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STM32: make PWM driver into a common file 

The pwmout driver is very similar for each STM32 family.

The only family specific part is defined in pwmout_device.h file.
It mainly contains few specific information:
- The mapping of PWM/TIMERS to APB1 or APB2 so that we can get the clock
- The clock calculation uses the right APB clock, which was sometimes
not the case before and could have lead to errors in case dividers were
enabled on APB clock settings. This case is now covered.
- Inactivation of inverted support on feaw families
pull/3795/head
Laurent MEUNIER 2017-02-16 15:28:25 +01:00
parent 293b9fc297
commit 1cbb3e18ac
19 changed files with 841 additions and 1923 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

214
targets/TARGET_STM/TARGET_STM32F0/pwmout_api.c
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@ -1,214 +0,0 @@
/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2014, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#include "pwmout_api.h"
#if DEVICE_PWMOUT
#include "cmsis.h"
#include "pinmap.h"
#include "mbed_error.h"
#include "PeripheralPins.h"
static TIM_HandleTypeDef TimHandle;
void pwmout_init(pwmout_t* obj, PinName pin) {
// Get the peripheral name from the pin and assign it to the object
obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
MBED_ASSERT(obj->pwm != (PWMName)NC);
// Get the functions (timer channel, (non)inverted) from the pin and assign it to the object
uint32_t function = pinmap_function(pin, PinMap_PWM);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
obj->inverted = STM_PIN_INVERTED(function);
// Enable TIM clock
#if defined(TIM1_BASE)
if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
#endif
#if defined(TIM2_BASE)
if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
#endif
#if defined(TIM3_BASE)
if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
#endif
#if defined(TIM14_BASE)
if (obj->pwm == PWM_14) __TIM14_CLK_ENABLE();
#endif
#if defined(TIM15_BASE)
if (obj->pwm == PWM_15) __TIM15_CLK_ENABLE();
#endif
#if defined(TIM16_BASE)
if (obj->pwm == PWM_16) __TIM16_CLK_ENABLE();
#endif
#if defined(TIM17_BASE)
if (obj->pwm == PWM_17) __TIM17_CLK_ENABLE();
#endif
// Configure GPIO
pinmap_pinout(pin, PinMap_PWM);
obj->pin = pin;
obj->period = 0;
obj->pulse = 0;
obj->prescaler = 1;
pwmout_period_us(obj, 20000); // 20 ms per default
}
void pwmout_free(pwmout_t* obj) {
// Configure GPIO
pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
}
void pwmout_write(pwmout_t* obj, float value) {
TIM_OC_InitTypeDef sConfig;
int channel = 0;
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
if (value < (float)0.0) {
value = 0.0;
} else if (value > (float)1.0) {
value = 1.0;
}
obj->pulse = (uint32_t)((float)obj->period * value);
// Configure channels
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.Pulse = obj->pulse / obj->prescaler;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
switch (obj->channel) {
case 1:
channel = TIM_CHANNEL_1;
break;
case 2:
channel = TIM_CHANNEL_2;
break;
case 3:
channel = TIM_CHANNEL_3;
break;
case 4:
channel = TIM_CHANNEL_4;
break;
default:
return;
}
if (HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel) != HAL_OK) {
error("Cannot initialize PWM\n");
}
if (obj->inverted) {
HAL_TIMEx_PWMN_Start(&TimHandle, channel);
} else {
HAL_TIM_PWM_Start(&TimHandle, channel);
}
}
float pwmout_read(pwmout_t* obj) {
float value = 0;
if (obj->period > 0) {
value = (float)(obj->pulse) / (float)(obj->period);
}
return ((value > (float)1.0) ? (float)(1.0) : (value));
}
void pwmout_period(pwmout_t* obj, float seconds) {
pwmout_period_us(obj, seconds * 1000000.0f);
}
void pwmout_period_ms(pwmout_t* obj, int ms) {
pwmout_period_us(obj, ms * 1000);
}
void pwmout_period_us(pwmout_t* obj, int us) {
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
float dc = pwmout_read(obj);
__HAL_TIM_DISABLE(&TimHandle);
/* To make it simple, we use to possible prescaler values which lead to:
* pwm unit = 1us, period/pulse can be from 1us to 65535us
* or
* pwm unit = 500us, period/pulse can be from 500us to ~32.76sec
* Be careful that all the channels of a PWM shares the same prescaler
*/
if (us > 0xFFFF) {
obj->prescaler = 500;
} else {
obj->prescaler = 1;
}
TimHandle.Init.Prescaler = ((SystemCoreClock / 1000000) * obj->prescaler) - 1;
if (TimHandle.Init.Prescaler > 0xFFFF)
error("PWM: out of range prescaler");
TimHandle.Init.Period = (us - 1) / obj->prescaler;
if (TimHandle.Init.Period > 0xFFFF)
error("PWM: out of range period");
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if (HAL_TIM_PWM_Init(&TimHandle) != HAL_OK) {
error("Cannot initialize PWM");
}
// Save for future use
obj->period = us;
// Set duty cycle again
pwmout_write(obj, dc);
__HAL_TIM_ENABLE(&TimHandle);
}
void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
}
void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
pwmout_pulsewidth_us(obj, ms * 1000);
}
void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
float value = (float)us / (float)obj->period;
pwmout_write(obj, value);
}
#endif

83
targets/TARGET_STM/TARGET_STM32F0/pwmout_device.h Normal file
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@ -0,0 +1,83 @@
/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2017, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#ifndef MBED_PWMOUT_DEVICE_H
#define MBED_PWMOUT_DEVICE_H
#include "cmsis.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef DEVICE_PWMOUT
typedef enum {
PWMOUT_ON_APB1 = 0,
PWMOUT_UNKNOWN = 1
} PwmoutApb;
/* Structure to describe Timers to APB */
typedef struct pwm_apb_map {
PWMName pwm; // an index entry for each EXIT line
PwmoutApb pwmoutApb;
} pwm_apb_map_t;
/* there is only 1 APB clock in F0 family */
#define PWMOUT_APB2_NOT_SUPPORTED
static const pwm_apb_map_t pwm_apb_map_table[] =
{
#if defined(TIM2_BASE)
{PWM_2, PWMOUT_ON_APB1},
#endif
#if defined(TIM3_BASE)
{PWM_3, PWMOUT_ON_APB1},
#endif
#if defined(TIM14_BASE)
{PWM_14, PWMOUT_ON_APB1},
#endif
#if defined(TIM1_BASE)
{PWM_1, PWMOUT_ON_APB1},
#endif
#if defined(TIM15_BASE)
{PWM_15, PWMOUT_ON_APB1},
#endif
#if defined(TIM16_BASE)
{PWM_16, PWMOUT_ON_APB1},
#endif
#if defined(TIM17_BASE)
{PWM_17, PWMOUT_ON_APB1},
#endif
{(PWMName) 0, PWMOUT_UNKNOWN}
};
#endif // DEVICE_PWMOUT
#endif

205
targets/TARGET_STM/TARGET_STM32F1/pwmout_api.c
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@ -1,205 +0,0 @@
/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2014, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#include "pwmout_api.h"
#if DEVICE_PWMOUT
#include "cmsis.h"
#include "pinmap.h"
#include "mbed_error.h"
#include "PeripheralPins.h"
static TIM_HandleTypeDef TimHandle;
void pwmout_init(pwmout_t* obj, PinName pin)
{
// Get the peripheral name from the pin and assign it to the object
obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
MBED_ASSERT(obj->pwm != (PWMName)NC);
// Get the functions (timer channel, (non)inverted) from the pin and assign it to the object
uint32_t function = pinmap_function(pin, PinMap_PWM);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
obj->inverted = STM_PIN_INVERTED(function);
// Enable TIM clock
if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
// Configure GPIO
pinmap_pinout(pin, PinMap_PWM);
obj->pin = pin;
obj->period = 0;
obj->pulse = 0;
obj->prescaler = 1;
pwmout_period_us(obj, 20000); // 20 ms per default
}
void pwmout_free(pwmout_t* obj)
{
// Configure GPIO
pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
}
void pwmout_write(pwmout_t* obj, float value)
{
TIM_OC_InitTypeDef sConfig;
int channel = 0;
int complementary_channel = 0;
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
if (value < (float)0.0) {
value = 0.0;
} else if (value > (float)1.0) {
value = 1.0;
}
obj->pulse = (uint32_t)((float)obj->period * value);
// Configure channels
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.Pulse = obj->pulse / obj->prescaler;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
switch (obj->channel) {
case 1:
channel = TIM_CHANNEL_1;
break;
case 2:
channel = TIM_CHANNEL_2;
break;
case 3:
channel = TIM_CHANNEL_3;
break;
case 4:
channel = TIM_CHANNEL_4;
break;
default:
return;
}
if (HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel) != HAL_OK) {
error("Cannot initialize PWM\n");
}
if (obj->inverted) {
HAL_TIMEx_PWMN_Start(&TimHandle, channel);
} else {
HAL_TIM_PWM_Start(&TimHandle, channel);
}
}
float pwmout_read(pwmout_t* obj)
{
float value = 0;
if (obj->period > 0) {
value = (float)(obj->pulse) / (float)(obj->period);
}
return ((value > (float)1.0) ? (float)(1.0) : (value));
}
void pwmout_period(pwmout_t* obj, float seconds)
{
pwmout_period_us(obj, seconds * 1000000.0f);
}
void pwmout_period_ms(pwmout_t* obj, int ms)
{
pwmout_period_us(obj, ms * 1000);
}
void pwmout_period_us(pwmout_t* obj, int us)
{
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
float dc = pwmout_read(obj);
__HAL_TIM_DISABLE(&TimHandle);
/* To make it simple, we use to possible prescaler values which lead to:
* pwm unit = 1us, period/pulse can be from 1us to 65535us
* or
* pwm unit = 500us, period/pulse can be from 500us to ~32.76sec
* Be careful that all the channels of a PWM shares the same prescaler
*/
if (us > 0xFFFF) {
obj->prescaler = 500;
} else {
obj->prescaler = 1;
}
TimHandle.Init.Prescaler = ((SystemCoreClock / 1000000) * obj->prescaler) - 1;
if (TimHandle.Init.Prescaler > 0xFFFF)
error("PWM: out of range prescaler");
TimHandle.Init.Period = (us - 1) / obj->prescaler;
if (TimHandle.Init.Period > 0xFFFF)
error("PWM: out of range period");
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
HAL_TIM_PWM_Init(&TimHandle);
// Save for future use
obj->period = us;
// Set duty cycle again
pwmout_write(obj, dc);
__HAL_TIM_ENABLE(&TimHandle);
}
void pwmout_pulsewidth(pwmout_t* obj, float seconds)
{
pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
}
void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
{
pwmout_pulsewidth_us(obj, ms * 1000);
}
void pwmout_pulsewidth_us(pwmout_t* obj, int us)
{
float value = (float)us / (float)obj->period;
pwmout_write(obj, value);
}
#endif

72
targets/TARGET_STM/TARGET_STM32F1/pwmout_device.h Normal file
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@ -0,0 +1,72 @@
/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2017, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#ifndef MBED_PWMOUT_DEVICE_H
#define MBED_PWMOUT_DEVICE_H
#include "cmsis.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef DEVICE_PWMOUT
typedef enum {
PWMOUT_ON_APB1 = 0,
PWMOUT_ON_APB2 = 1,
PWMOUT_UNKNOWN = 2
} PwmoutApb;
/* Structure to describe Timers to APB */
typedef struct pwm_apb_map {
PWMName pwm; // an index entry for each EXIT line
PwmoutApb pwmoutApb;
} pwm_apb_map_t;
static const pwm_apb_map_t pwm_apb_map_table[] =
{
#if defined(TIM1_BASE)
{PWM_1, PWMOUT_ON_APB2},
#endif
#if defined(TIM2_BASE)
{PWM_2, PWMOUT_ON_APB1},
#endif
#if defined(TIM3_BASE)
{PWM_3, PWMOUT_ON_APB1},
#endif
#if defined(TIM4_BASE)
{PWM_4, PWMOUT_ON_APB1},
#endif
{(PWMName) 0, PWMOUT_UNKNOWN}
};
#endif // DEVICE_PWMOUT
#endif

1
targets/TARGET_STM/TARGET_STM32F2/objects.h
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@ -128,6 +128,7 @@ struct i2c_s {
struct pwmout_s {
PWMName pwm;
PinName pin;
uint32_t prescaler;
uint32_t period;
uint32_t pulse;
uint8_t channel;

282
targets/TARGET_STM/TARGET_STM32F2/pwmout_api.c
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@ -1,282 +0,0 @@
/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2016, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#include "pwmout_api.h"
#if DEVICE_PWMOUT
#include "cmsis.h"
#include "pinmap.h"
#include "mbed_error.h"
#include "PeripheralPins.h"
static TIM_HandleTypeDef TimHandle;
void pwmout_init(pwmout_t* obj, PinName pin)
{
// Get the peripheral name from the pin and assign it to the object
obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
MBED_ASSERT(obj->pwm != (PWMName)NC);
// Get the functions (timer channel, (non)inverted) from the pin and assign it to the object
uint32_t function = pinmap_function(pin, PinMap_PWM);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
obj->inverted = STM_PIN_INVERTED(function);
// Enable TIM clock
#if defined(TIM1_BASE)
if (obj->pwm == PWM_1) __HAL_RCC_TIM1_CLK_ENABLE();
#endif
#if defined(TIM2_BASE)
if (obj->pwm == PWM_2) __HAL_RCC_TIM2_CLK_ENABLE();
#endif
#if defined(TIM3_BASE)
if (obj->pwm == PWM_3) __HAL_RCC_TIM3_CLK_ENABLE();
#endif
#if defined(TIM4_BASE)
if (obj->pwm == PWM_4) __HAL_RCC_TIM4_CLK_ENABLE();
#endif
#if defined(TIM5_BASE)
if (obj->pwm == PWM_5) __HAL_RCC_TIM5_CLK_ENABLE();
#endif
#if defined(TIM8_BASE)
if (obj->pwm == PWM_8) __HAL_RCC_TIM8_CLK_ENABLE();
#endif
#if defined(TIM9_BASE)
if (obj->pwm == PWM_9) __HAL_RCC_TIM9_CLK_ENABLE();
#endif
#if defined(TIM10_BASE)
if (obj->pwm == PWM_10) __HAL_RCC_TIM10_CLK_ENABLE();
#endif
#if defined(TIM11_BASE)
if (obj->pwm == PWM_11) __HAL_RCC_TIM11_CLK_ENABLE();
#endif
#if defined(TIM12_BASE)
if (obj->pwm == PWM_12) __HAL_RCC_TIM12_CLK_ENABLE();
#endif
#if defined(TIM13_BASE)
if (obj->pwm == PWM_13) __HAL_RCC_TIM13_CLK_ENABLE();
#endif
#if defined(TIM14_BASE)
if (obj->pwm == PWM_14) __HAL_RCC_TIM14_CLK_ENABLE();
#endif
// Configure GPIO
pinmap_pinout(pin, PinMap_PWM);
obj->pin = pin;
obj->period = 0;
obj->pulse = 0;
pwmout_period_us(obj, 20000); // 20 ms per default
}
void pwmout_free(pwmout_t* obj)
{
// Configure GPIO
pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
}
void pwmout_write(pwmout_t* obj, float value)
{
TIM_OC_InitTypeDef sConfig;
int channel = 0;
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
if (value < (float)0.0) {
value = 0.0;
} else if (value > (float)1.0) {
value = 1.0;
}
obj->pulse = (uint32_t)((float)obj->period * value);
// Configure channels
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.Pulse = obj->pulse;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
switch (obj->channel) {
case 1:
channel = TIM_CHANNEL_1;
break;
case 2:
channel = TIM_CHANNEL_2;
break;
case 3:
channel = TIM_CHANNEL_3;
break;
case 4:
channel = TIM_CHANNEL_4;
break;
default:
return;
}
if (HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel) != HAL_OK) {
error("Cannot initialize PWM\n");
}
if (obj->inverted) {
HAL_TIMEx_PWMN_Start(&TimHandle, channel);
} else {
HAL_TIM_PWM_Start(&TimHandle, channel);
}
}
float pwmout_read(pwmout_t* obj)
{
float value = 0;
if (obj->period > 0) {
value = (float)(obj->pulse) / (float)(obj->period);
}
return ((value > (float)1.0) ? (float)(1.0) : (value));
}
void pwmout_period(pwmout_t* obj, float seconds)
{
pwmout_period_us(obj, seconds * 1000000.0f);
}
void pwmout_period_ms(pwmout_t* obj, int ms)
{
pwmout_period_us(obj, ms * 1000);
}
void pwmout_period_us(pwmout_t* obj, int us)
{
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
RCC_ClkInitTypeDef RCC_ClkInitStruct;
uint32_t PclkFreq;
uint32_t APBxCLKDivider;
float dc = pwmout_read(obj);
__HAL_TIM_DISABLE(&TimHandle);
// Get clock configuration
// Note: PclkFreq contains here the Latency (not used after)
HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &PclkFreq);
// Get the PCLK and APBCLK divider related to the timer
switch (obj->pwm) {
// APB1 clock
#if defined(TIM2_BASE)
case PWM_2:
#endif
#if defined(TIM3_BASE)
case PWM_3:
#endif
#if defined(TIM4_BASE)
case PWM_4:
#endif
#if defined(TIM5_BASE)
case PWM_5:
#endif
#if defined(TIM12_BASE)
case PWM_12:
#endif
#if defined(TIM13_BASE)
case PWM_13:
#endif
#if defined(TIM14_BASE)
case PWM_14:
#endif
PclkFreq = HAL_RCC_GetPCLK1Freq();
APBxCLKDivider = RCC_ClkInitStruct.APB1CLKDivider;
break;
// APB2 clock
#if defined(TIM1_BASE)
case PWM_1:
#endif
#if defined(TIM8_BASE)
case PWM_8:
#endif
#if defined(TIM9_BASE)
case PWM_9:
#endif
#if defined(TIM10_BASE)
case PWM_10:
#endif
#if defined(TIM11_BASE)
case PWM_11:
#endif
PclkFreq = HAL_RCC_GetPCLK2Freq();
APBxCLKDivider = RCC_ClkInitStruct.APB2CLKDivider;
break;
default:
return;
}
TimHandle.Init.Period = us - 1;
// TIMxCLK = PCLKx when the APB prescaler = 1 else TIMxCLK = 2 * PCLKx
if (APBxCLKDivider == RCC_HCLK_DIV1)
TimHandle.Init.Prescaler = (uint16_t)((PclkFreq) / 1000000) - 1; // 1 us tick
else
TimHandle.Init.Prescaler = (uint16_t)((PclkFreq * 2) / 1000000) - 1; // 1 us tick
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if (HAL_TIM_PWM_Init(&TimHandle) != HAL_OK) {
error("Cannot initialize PWM\n");
}
// Set duty cycle again
pwmout_write(obj, dc);
// Save for future use
obj->period = us;
__HAL_TIM_ENABLE(&TimHandle);
}
void pwmout_pulsewidth(pwmout_t* obj, float seconds)
{
pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
}
void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
{
pwmout_pulsewidth_us(obj, ms * 1000);
}
void pwmout_pulsewidth_us(pwmout_t* obj, int us)
{
float value = (float)us / (float)obj->period;
pwmout_write(obj, value);
}
#endif

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/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2017, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#ifndef MBED_PWMOUT_DEVICE_H
#define MBED_PWMOUT_DEVICE_H
#include "cmsis.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef DEVICE_PWMOUT
typedef enum {
PWMOUT_ON_APB1 = 0,
PWMOUT_ON_APB2 = 1,
PWMOUT_UNKNOWN = 2
} PwmoutApb;
/* Structure to describe Timers to APB */
typedef struct pwm_apb_map {
PWMName pwm; // an index entry for each EXIT line
PwmoutApb pwmoutApb;
} pwm_apb_map_t;
static const pwm_apb_map_t pwm_apb_map_table[] =
{
#if defined(TIM2_BASE)
{PWM_2, PWMOUT_ON_APB1},
#endif
#if defined(TIM3_BASE)
{PWM_3, PWMOUT_ON_APB1},
#endif
#if defined(TIM4_BASE)
{PWM_4, PWMOUT_ON_APB1},
#endif
#if defined(TIM5_BASE)
{PWM_5, PWMOUT_ON_APB1},
#endif
#if defined(TIM12_BASE)
{PWM_12, PWMOUT_ON_APB1},
#endif
#if defined(TIM13_BASE)
{PWM_13, PWMOUT_ON_APB1},
#endif
#if defined(TIM14_BASE)
{PWM_14, PWMOUT_ON_APB1},
#endif
#if defined(TIM1_BASE)
{PWM_1, PWMOUT_ON_APB2},
#endif
#if defined(TIM8_BASE)
{PWM_8, PWMOUT_ON_APB2},
#endif
#if defined(TIM9_BASE)
{PWM_9, PWMOUT_ON_APB2},
#endif
#if defined(TIM10_BASE)
{PWM_10, PWMOUT_ON_APB2},
#endif
#if defined(TIM11_BASE)
{PWM_11, PWMOUT_ON_APB2},
#endif
{(PWMName) 0, PWMOUT_UNKNOWN}
};
#endif // DEVICE_PWMOUT
#endif

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targets/TARGET_STM/TARGET_STM32F3/pwmout_api.c
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@ -1,259 +0,0 @@
/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2015, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#include "pwmout_api.h"
#if DEVICE_PWMOUT
#include "cmsis.h"
#include "pinmap.h"
#include "mbed_error.h"
#include "PeripheralPins.h"
static TIM_HandleTypeDef TimHandle;
void pwmout_init(pwmout_t* obj, PinName pin)
{
// Get the peripheral name from the pin and assign it to the object
obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
MBED_ASSERT(obj->pwm != (PWMName)NC);
// Get the pin function and assign the used channel to the object
uint32_t function = pinmap_function(pin, PinMap_PWM);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
obj->inverted = STM_PIN_INVERTED(function);
#if defined(TIM1_BASE)
if (obj->pwm == PWM_1) __HAL_RCC_TIM1_CLK_ENABLE();
#endif
#if defined(TIM2_BASE)
if (obj->pwm == PWM_2) __HAL_RCC_TIM2_CLK_ENABLE();
#endif
#if defined(TIM3_BASE)
if (obj->pwm == PWM_3) __HAL_RCC_TIM3_CLK_ENABLE();
#endif
#if defined(TIM4_BASE)
if (obj->pwm == PWM_4) __HAL_RCC_TIM4_CLK_ENABLE();
#endif
#if defined(TIM5_BASE)
if (obj->pwm == PWM_5) __HAL_RCC_TIM5_CLK_ENABLE();
#endif
#if defined(TIM8_BASE)
if (obj->pwm == PWM_8) __HAL_RCC_TIM8_CLK_ENABLE();
#endif
#if defined(TIM9_BASE)
if (obj->pwm == PWM_9) __HAL_RCC_TIM9_CLK_ENABLE();
#endif
#if defined(TIM10_BASE)
if (obj->pwm == PWM_10) __HAL_RCC_TIM10_CLK_ENABLE();
#endif
#if defined(TIM11_BASE)
if (obj->pwm == PWM_11) __HAL_RCC_TIM11_CLK_ENABLE();
#endif
#if defined(TIM12_BASE)
if (obj->pwm == PWM_12) __HAL_RCC_TIM12_CLK_ENABLE();
#endif
#if defined(TIM13_BASE)
if (obj->pwm == PWM_13) __HAL_RCC_TIM13_CLK_ENABLE();
#endif
#if defined(TIM14_BASE)
if (obj->pwm == PWM_14) __HAL_RCC_TIM14_CLK_ENABLE();
#endif
#if defined(TIM15_BASE)
if (obj->pwm == PWM_15) __HAL_RCC_TIM15_CLK_ENABLE();
#endif
#if defined(TIM16_BASE)
if (obj->pwm == PWM_16) __HAL_RCC_TIM16_CLK_ENABLE();
#endif
#if defined(TIM17_BASE)
if (obj->pwm == PWM_17) __HAL_RCC_TIM17_CLK_ENABLE();
#endif
#if defined(TIM18_BASE)
if (obj->pwm == PWM_18) __HAL_RCC_TIM18_CLK_ENABLE();
#endif
#if defined(TIM19_BASE)
if (obj->pwm == PWM_19) __HAL_RCC_TIM19_CLK_ENABLE();
#endif
#if defined(TIM20_BASE)
if (obj->pwm == PWM_20) __HAL_RCC_TIM20_CLK_ENABLE();
#endif
// Configure GPIO
pinmap_pinout(pin, PinMap_PWM);
obj->pin = pin;
obj->period = 0;
obj->pulse = 0;
obj->prescaler = 1;
pwmout_period_us(obj, 20000); // 20 ms per default
}
void pwmout_free(pwmout_t* obj)
{
// Configure GPIO
pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
}
void pwmout_write(pwmout_t* obj, float value)
{
TIM_OC_InitTypeDef sConfig;
int channel = 0;
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
if (value < (float)0.0) {
value = 0.0;
} else if (value > (float)1.0) {
value = 1.0;
}
obj->pulse = (uint32_t)((float)obj->period * value);
// Configure channels
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.Pulse = obj->pulse / obj->prescaler;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
switch (obj->channel) {
case 1:
channel = TIM_CHANNEL_1;
break;
case 2:
channel = TIM_CHANNEL_2;
break;
case 3:
channel = TIM_CHANNEL_3;
break;
case 4:
channel = TIM_CHANNEL_4;
break;
default:
return;
}
if (HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel) != HAL_OK) {
error("Cannot initialize PWM");
}
if (obj->inverted) {
HAL_TIMEx_PWMN_Start(&TimHandle, channel);
} else {
HAL_TIM_PWM_Start(&TimHandle, channel);
}
}
float pwmout_read(pwmout_t* obj)
{
float value = 0;
if (obj->period > 0) {
value = (float)(obj->pulse) / (float)(obj->period);
}
return ((value > (float)1.0) ? (float)(1.0) : (value));
}
void pwmout_period(pwmout_t* obj, float seconds)
{
pwmout_period_us(obj, seconds * 1000000.0f);
}
void pwmout_period_ms(pwmout_t* obj, int ms)
{
pwmout_period_us(obj, ms * 1000);
}
void pwmout_period_us(pwmout_t* obj, int us)
{
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
float dc = pwmout_read(obj);
__HAL_TIM_DISABLE(&TimHandle);
// Update the SystemCoreClock variable
SystemCoreClockUpdate();
/* To make it simple, we use to possible prescaler values which lead to:
* pwm unit = 1us, period/pulse can be from 1us to 65535us
* or
* pwm unit = 500us, period/pulse can be from 500us to ~32.76sec
* Be careful that all the channels of a PWM shares the same prescaler
*/
if (us > 0xFFFF) {
obj->prescaler = 500;
} else {
obj->prescaler = 1;
}
TimHandle.Init.Prescaler = ((SystemCoreClock / 1000000) * obj->prescaler) - 1;
if (TimHandle.Init.Prescaler > 0xFFFF)
error("PWM: out of range prescaler");
TimHandle.Init.Period = (us - 1) / obj->prescaler;
if (TimHandle.Init.Period > 0xFFFF)
error("PWM: out of range period");
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if (HAL_TIM_PWM_Init(&TimHandle) != HAL_OK) {
error("Cannot initialize PWM");
}
// Save for future use
obj->period = us;
// Set duty cycle again
pwmout_write(obj, dc);
__HAL_TIM_ENABLE(&TimHandle);
}
void pwmout_pulsewidth(pwmout_t* obj, float seconds)
{
pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
}
void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
{
pwmout_pulsewidth_us(obj, ms * 1000);
}
void pwmout_pulsewidth_us(pwmout_t* obj, int us)
{
float value = (float)us / (float)obj->period;
pwmout_write(obj, value);
}
#endif

87
targets/TARGET_STM/TARGET_STM32F3/pwmout_device.h Normal file
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/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2017, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#ifndef MBED_PWMOUT_DEVICE_H
#define MBED_PWMOUT_DEVICE_H
#include "cmsis.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef DEVICE_PWMOUT
typedef enum {
PWMOUT_ON_APB1 = 0,
PWMOUT_ON_APB2 = 1,
PWMOUT_UNKNOWN = 2
} PwmoutApb;
/* Structure to describe Timers to APB */
typedef struct pwm_apb_map {
PWMName pwm; // an index entry for each EXIT line
PwmoutApb pwmoutApb;
} pwm_apb_map_t;
static const pwm_apb_map_t pwm_apb_map_table[] =
{
#if defined(TIM2_BASE)
{PWM_2, PWMOUT_ON_APB1},
#endif
#if defined(TIM3_BASE)
{PWM_3, PWMOUT_ON_APB1},
#endif
#if defined(TIM4_BASE)
{PWM_4, PWMOUT_ON_APB1},
#endif
#if defined(TIM1_BASE)
{PWM_1, PWMOUT_ON_APB2},
#endif
#if defined(TIM8_BASE)
{PWM_8, PWMOUT_ON_APB2},
#endif
#if defined(TIM15_BASE)
{PWM_15, PWMOUT_ON_APB2},
#endif
#if defined(TIM16_BASE)
{PWM_16, PWMOUT_ON_APB2},
#endif
#if defined(TIM17_BASE)
{PWM_17, PWMOUT_ON_APB2},
#endif
#if defined(TIM20_BASE)
{PWM_20, PWMOUT_ON_APB2},
#endif
{(PWMName) 0, PWMOUT_UNKNOWN}
};
#endif // DEVICE_PWMOUT
#endif

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targets/TARGET_STM/TARGET_STM32F4/pwmout_device.h Normal file
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/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2017, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#ifndef MBED_PWMOUT_DEVICE_H
#define MBED_PWMOUT_DEVICE_H
#include "cmsis.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef DEVICE_PWMOUT
typedef enum {
PWMOUT_ON_APB1 = 0,
PWMOUT_ON_APB2 = 1,
PWMOUT_UNKNOWN = 2
} PwmoutApb;
/* Structure to describe Timers to APB */
typedef struct pwm_apb_map {
PWMName pwm; // an index entry for each EXIT line
PwmoutApb pwmoutApb;
} pwm_apb_map_t;
static const pwm_apb_map_t pwm_apb_map_table[] =
{
#if defined(TIM2_BASE)
{PWM_2, PWMOUT_ON_APB1},
#endif
#if defined(TIM3_BASE)
{PWM_3, PWMOUT_ON_APB1},
#endif
#if defined(TIM4_BASE)
{PWM_4, PWMOUT_ON_APB1},
#endif
#if defined(TIM5_BASE)
{PWM_5, PWMOUT_ON_APB1},
#endif
#if defined(TIM12_BASE)
{PWM_12, PWMOUT_ON_APB1},
#endif
#if defined(TIM13_BASE)
{PWM_13, PWMOUT_ON_APB1},
#endif
#if defined(TIM14_BASE)
{PWM_14, PWMOUT_ON_APB1},
#endif
#if defined(TIM1_BASE)
{PWM_1, PWMOUT_ON_APB2},
#endif
#if defined(TIM8_BASE)
{PWM_8, PWMOUT_ON_APB2},
#endif
#if defined(TIM9_BASE)
{PWM_9, PWMOUT_ON_APB2},
#endif
#if defined(TIM10_BASE)
{PWM_10, PWMOUT_ON_APB2},
#endif
#if defined(TIM11_BASE)
{PWM_11, PWMOUT_ON_APB2},
#endif
{(PWMName) 0, PWMOUT_UNKNOWN}
};
#endif // DEVICE_PWMOUT
#endif

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targets/TARGET_STM/TARGET_STM32F7/pwmout_api.c
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@ -1,253 +0,0 @@
/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2015, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#include "pwmout_api.h"
#if DEVICE_PWMOUT
#include "cmsis.h"
#include "pinmap.h"
#include "mbed_error.h"
#include "PeripheralPins.h"
static TIM_HandleTypeDef TimHandle;
void pwmout_init(pwmout_t* obj, PinName pin)
{
// Get the peripheral name from the pin and assign it to the object
obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
MBED_ASSERT(obj->pwm != (PWMName)NC);
// Get the functions (timer channel, (non)inverted) from the pin and assign it to the object
uint32_t function = pinmap_function(pin, PinMap_PWM);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
obj->inverted = STM_PIN_INVERTED(function);
// Enable TIM clock
if (obj->pwm == PWM_1) __HAL_RCC_TIM1_CLK_ENABLE();
if (obj->pwm == PWM_2) __HAL_RCC_TIM2_CLK_ENABLE();
if (obj->pwm == PWM_3) __HAL_RCC_TIM3_CLK_ENABLE();
if (obj->pwm == PWM_4) __HAL_RCC_TIM4_CLK_ENABLE();
if (obj->pwm == PWM_8) __HAL_RCC_TIM8_CLK_ENABLE();
if (obj->pwm == PWM_9) __HAL_RCC_TIM9_CLK_ENABLE();
if (obj->pwm == PWM_10) __HAL_RCC_TIM10_CLK_ENABLE();
if (obj->pwm == PWM_11) __HAL_RCC_TIM11_CLK_ENABLE();
if (obj->pwm == PWM_12) __HAL_RCC_TIM12_CLK_ENABLE();
if (obj->pwm == PWM_13) __HAL_RCC_TIM13_CLK_ENABLE();
if (obj->pwm == PWM_14) __HAL_RCC_TIM14_CLK_ENABLE();
// Configure GPIO
pinmap_pinout(pin, PinMap_PWM);
obj->pin = pin;
obj->period = 0;
obj->pulse = 0;
obj->prescaler = 1;
pwmout_period_us(obj, 20000); // 20 ms per default
}
void pwmout_free(pwmout_t* obj)
{
// Configure GPIO
pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
}
void pwmout_write(pwmout_t* obj, float value)
{
TIM_OC_InitTypeDef sConfig;
int channel = 0;
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
if (value < (float)0.0) {
value = 0.0;
} else if (value > (float)1.0) {
value = 1.0;
}
obj->pulse = (uint32_t)((float)obj->period * value);
// Configure channels
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.Pulse = obj->pulse / obj->prescaler;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
switch (obj->channel) {
case 1:
channel = TIM_CHANNEL_1;
break;
case 2:
channel = TIM_CHANNEL_2;
break;
case 3:
channel = TIM_CHANNEL_3;
break;
case 4:
channel = TIM_CHANNEL_4;
break;
default:
return;
}
if (HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel) != HAL_OK) {
error("Cannot configure PWM channel\n");
}
if (obj->inverted) {
HAL_TIMEx_PWMN_Start(&TimHandle, channel);
} else {
HAL_TIM_PWM_Start(&TimHandle, channel);
}
}
float pwmout_read(pwmout_t* obj)
{
float value = 0;
if (obj->period > 0) {
value = (float)(obj->pulse) / (float)(obj->period);
}
return ((value > (float)1.0) ? (float)(1.0) : (value));
}
void pwmout_period(pwmout_t* obj, float seconds)
{
pwmout_period_us(obj, seconds * 1000000.0f);
}
void pwmout_period_ms(pwmout_t* obj, int ms)
{
pwmout_period_us(obj, ms * 1000);
}
void pwmout_period_us(pwmout_t* obj, int us)
{
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
RCC_ClkInitTypeDef RCC_ClkInitStruct;
uint32_t PclkFreq;
uint32_t APBxCLKDivider;
float dc = pwmout_read(obj);
__HAL_TIM_DISABLE(&TimHandle);
// Get clock configuration
// Note: PclkFreq contains here the Latency (not used after)
HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &PclkFreq);
// Get the PCLK and APBCLK divider related to the timer
switch (obj->pwm) {
// APB1 clock
case PWM_2:
case PWM_3:
case PWM_4:
case PWM_5:
case PWM_12:
case PWM_13:
case PWM_14:
PclkFreq = HAL_RCC_GetPCLK1Freq();
APBxCLKDivider = RCC_ClkInitStruct.APB1CLKDivider;
break;
// APB2 clock
case PWM_1:
case PWM_8:
case PWM_9:
case PWM_10:
case PWM_11:
PclkFreq = HAL_RCC_GetPCLK2Freq();
APBxCLKDivider = RCC_ClkInitStruct.APB2CLKDivider;
break;
default:
return;
}
/* To make it simple, we use to possible prescaler values which lead to:
* pwm unit = 1us, period/pulse can be from 1us to 65535us
* or
* pwm unit = 500us, period/pulse can be from 500us to ~32.76sec
* Be careful that all the channels of a PWM shares the same prescaler
*/
if (us > 0xFFFF) {
obj->prescaler = 500;
} else {
obj->prescaler = 1;
}
// TIMxCLK = PCLKx when the APB prescaler = 1 else TIMxCLK = 2 * PCLKx
if (APBxCLKDivider == RCC_HCLK_DIV1)
TimHandle.Init.Prescaler = (uint16_t)(((PclkFreq) / 1000000) * obj->prescaler) - 1; // 1 us tick
else
TimHandle.Init.Prescaler = (uint16_t)(((PclkFreq * 2) / 1000000) * obj->prescaler) - 1; // 1 us tick
if (TimHandle.Init.Prescaler > 0xFFFF)
error("PWM: out of range prescaler");
TimHandle.Init.Period = (us - 1) / obj->prescaler;
if (TimHandle.Init.Period > 0xFFFF)
error("PWM: out of range period");
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if (HAL_TIM_PWM_Init(&TimHandle) != HAL_OK) {
error("Cannot initialize PWM\n");
}
// Save for future use
obj->period = us;
// Set duty cycle again
pwmout_write(obj, dc);
__HAL_TIM_ENABLE(&TimHandle);
}
void pwmout_pulsewidth(pwmout_t* obj, float seconds)
{
pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
}
void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
{
pwmout_pulsewidth_us(obj, ms * 1000);
}
void pwmout_pulsewidth_us(pwmout_t* obj, int us)
{
float value = (float)us / (float)obj->period;
pwmout_write(obj, value);
}
#endif

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/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2017, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#ifndef MBED_PWMOUT_DEVICE_H
#define MBED_PWMOUT_DEVICE_H
#include "cmsis.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef DEVICE_PWMOUT
typedef enum {
PWMOUT_ON_APB1 = 0,
PWMOUT_ON_APB2 = 1,
PWMOUT_UNKNOWN = 2
} PwmoutApb;
/* Structure to describe Timers to APB */
typedef struct pwm_apb_map {
PWMName pwm; // an index entry for each EXIT line
PwmoutApb pwmoutApb;
} pwm_apb_map_t;
static const pwm_apb_map_t pwm_apb_map_table[] =
{
#if defined(TIM2_BASE)
{PWM_2, PWMOUT_ON_APB1},
#endif
#if defined(TIM3_BASE)
{PWM_3, PWMOUT_ON_APB1},
#endif
#if defined(TIM4_BASE)
{PWM_4, PWMOUT_ON_APB1},
#endif
#if defined(TIM5_BASE)
{PWM_5, PWMOUT_ON_APB1},
#endif
#if defined(TIM12_BASE)
{PWM_12, PWMOUT_ON_APB1},
#endif
#if defined(TIM13_BASE)
{PWM_13, PWMOUT_ON_APB1},
#endif
#if defined(TIM14_BASE)
{PWM_14, PWMOUT_ON_APB1},
#endif
#if defined(TIM1_BASE)
{PWM_1, PWMOUT_ON_APB2},
#endif
#if defined(TIM8_BASE)
{PWM_8, PWMOUT_ON_APB2},
#endif
#if defined(TIM9_BASE)
{PWM_9, PWMOUT_ON_APB2},
#endif
#if defined(TIM10_BASE)
{PWM_10, PWMOUT_ON_APB2},
#endif
#if defined(TIM11_BASE)
{PWM_11, PWMOUT_ON_APB2},
#endif
{(PWMName) 0, PWMOUT_UNKNOWN}
};
#endif // DEVICE_PWMOUT
#endif

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/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2015, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#include "pwmout_api.h"
#if DEVICE_PWMOUT
#include "cmsis.h"
#include "pinmap.h"
#include "mbed_error.h"
#include "PeripheralPins.h"
static TIM_HandleTypeDef TimHandle;
void pwmout_init(pwmout_t* obj, PinName pin)
{
// Get the peripheral name from the pin and assign it to the object
obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
MBED_ASSERT(obj->pwm != (PWMName)NC);
// Get the pin function and assign the used channel to the object
uint32_t function = pinmap_function(pin, PinMap_PWM);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
obj->inverted = STM_PIN_INVERTED(function);
// Enable TIM clock
if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
#if defined(TIM3_BASE)
if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
#endif
if (obj->pwm == PWM_21) __TIM21_CLK_ENABLE();
#if defined(TIM22_BASE)
if (obj->pwm == PWM_22) __TIM22_CLK_ENABLE();
#endif
// Configure GPIO
pinmap_pinout(pin, PinMap_PWM);
obj->pin = pin;
obj->period = 0;
obj->pulse = 0;
obj->prescaler = 1;
pwmout_period_us(obj, 20000); // 20 ms per default
}
void pwmout_free(pwmout_t* obj)
{
// Configure GPIO
pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
}
void pwmout_write(pwmout_t* obj, float value)
{
TIM_OC_InitTypeDef sConfig;
int channel = 0;
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
if (value < (float)0.0) {
value = 0.0;
} else if (value > (float)1.0) {
value = 1.0;
}
obj->pulse = (uint32_t)((float)obj->period * value);
// Configure channels
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.Pulse = obj->pulse / obj->prescaler;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_ENABLE;
switch (obj->channel) {
case 1:
channel = TIM_CHANNEL_1;
break;
case 2:
channel = TIM_CHANNEL_2;
break;
case 3:
channel = TIM_CHANNEL_3;
break;
case 4:
channel = TIM_CHANNEL_4;
break;
default:
return;
}
if (HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel) != HAL_OK) {
error("Cannot initialize PWM");
}
HAL_TIM_PWM_Start(&TimHandle, channel);
}
float pwmout_read(pwmout_t* obj)
{
float value = 0;
if (obj->period > 0) {
value = (float)(obj->pulse) / (float)(obj->period);
}
return ((value > (float)1.0) ? (float)(1.0) : (value));
}
void pwmout_period(pwmout_t* obj, float seconds)
{
pwmout_period_us(obj, seconds * 1000000.0f);
}
void pwmout_period_ms(pwmout_t* obj, int ms)
{
pwmout_period_us(obj, ms * 1000);
}
void pwmout_period_us(pwmout_t* obj, int us)
{
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
float dc = pwmout_read(obj);
__HAL_TIM_DISABLE(&TimHandle);
/* To make it simple, we use to possible prescaler values which lead to:
* pwm unit = 1us, period/pulse can be from 1us to 65535us
* or
* pwm unit = 500us, period/pulse can be from 500us to ~32.76sec
* Be careful that all the channels of a PWM shares the same prescaler
*/
if (us > 0xFFFF) {
obj->prescaler = 500;
} else {
obj->prescaler = 1;
}
TimHandle.Init.Prescaler = ((SystemCoreClock / 1000000) * obj->prescaler) - 1;
if (TimHandle.Init.Prescaler > 0xFFFF)
error("PWM: out of range prescaler");
TimHandle.Init.Period = (us - 1) / obj->prescaler;
if (TimHandle.Init.Period > 0xFFFF)
error("PWM: out of range period");
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if (HAL_TIM_PWM_Init(&TimHandle) != HAL_OK) {
error("Cannot initialize PWM");
}
// Save for future use
obj->period = us;
// Set duty cycle again
pwmout_write(obj, dc);
__HAL_TIM_ENABLE(&TimHandle);
}
void pwmout_pulsewidth(pwmout_t* obj, float seconds)
{
pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
}
void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
{
pwmout_pulsewidth_us(obj, ms * 1000);
}
void pwmout_pulsewidth_us(pwmout_t* obj, int us)
{
float value = (float)us / (float)obj->period;
pwmout_write(obj, value);
}
#endif

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/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2017, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#ifndef MBED_PWMOUT_DEVICE_H
#define MBED_PWMOUT_DEVICE_H
#include "cmsis.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef DEVICE_PWMOUT
#define PWMOUT_INVERTED_NOT_SUPPORTED
typedef enum {
PWMOUT_ON_APB1 = 0,
PWMOUT_ON_APB2 = 1,
PWMOUT_UNKNOWN = 2
} PwmoutApb;
/* Structure to describe Timers to APB */
typedef struct pwm_apb_map {
PWMName pwm; // an index entry for each EXIT line
PwmoutApb pwmoutApb;
} pwm_apb_map_t;
static const pwm_apb_map_t pwm_apb_map_table[] =
{
#if defined(TIM2_BASE)
{PWM_2, PWMOUT_ON_APB1},
#endif
#if defined(TIM3_BASE)
{PWM_3, PWMOUT_ON_APB1},
#endif
#if defined(TIM21_BASE)
{PWM_21, PWMOUT_ON_APB2},
#endif
#if defined(TIM22_BASE)
{PWM_22, PWMOUT_ON_APB2},
#endif
{(PWMName) 0, PWMOUT_UNKNOWN}
};
#endif // DEVICE_PWMOUT
#endif

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/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2014, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#include "pwmout_api.h"
#if DEVICE_PWMOUT
#include "cmsis.h"
#include "pinmap.h"
#include "mbed_error.h"
#include "PeripheralPins.h"
static TIM_HandleTypeDef TimHandle;
void pwmout_init(pwmout_t* obj, PinName pin)
{
// Get the peripheral name from the pin and assign it to the object
obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
if (obj->pwm == (PWMName)NC) {
error("PWM error: pinout mapping failed.");
}
// Get the functions (timer channel, (non)inverted) from the pin and assign it to the object
uint32_t function = pinmap_function(pin, PinMap_PWM);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
obj->inverted = STM_PIN_INVERTED(function);
// Enable TIM clock
if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
if (obj->pwm == PWM_4) __TIM4_CLK_ENABLE();
if (obj->pwm == PWM_5) __TIM5_CLK_ENABLE();
if (obj->pwm == PWM_9) __TIM9_CLK_ENABLE();
if (obj->pwm == PWM_10) __TIM10_CLK_ENABLE();
if (obj->pwm == PWM_11) __TIM11_CLK_ENABLE();
// Configure GPIO
pinmap_pinout(pin, PinMap_PWM);
obj->pin = pin;
obj->period = 0;
obj->pulse = 0;
obj->prescaler = 1;
pwmout_period_us(obj, 20000); // 20 ms per default
}
void pwmout_free(pwmout_t* obj)
{
// Configure GPIO
pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
}
void pwmout_write(pwmout_t* obj, float value)
{
TIM_OC_InitTypeDef sConfig;
int channel = 0;
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
if (value < (float)0.0) {
value = 0.0;
} else if (value > (float)1.0) {
value = 1.0;
}
obj->pulse = (uint32_t)((float)obj->period * value);
// Configure channels
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.Pulse = obj->pulse / obj->prescaler;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
#ifdef TIM_OCIDLESTATE_RESET
sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
#endif
#ifdef TIM_OCNIDLESTATE_RESET
sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
#endif
switch (obj->channel) {
case 1:
channel = TIM_CHANNEL_1;
break;
case 2:
channel = TIM_CHANNEL_2;
break;
case 3:
channel = TIM_CHANNEL_3;
break;
case 4:
channel = TIM_CHANNEL_4;
break;
default:
return;
}
if (HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel) != HAL_OK) {
error("Cannot initialize PWM\n");
}
HAL_TIM_PWM_Start(&TimHandle, channel);
}
float pwmout_read(pwmout_t* obj)
{
float value = 0;
if (obj->period > 0) {
value = (float)(obj->pulse) / (float)(obj->period);
}
return ((value > (float)1.0) ? (float)(1.0) : (value));
}
void pwmout_period(pwmout_t* obj, float seconds)
{
pwmout_period_us(obj, seconds * 1000000.0f);
}
void pwmout_period_ms(pwmout_t* obj, int ms)
{
pwmout_period_us(obj, ms * 1000);
}
void pwmout_period_us(pwmout_t* obj, int us)
{
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
float dc = pwmout_read(obj);
__HAL_TIM_DISABLE(&TimHandle);
/* To make it simple, we use to possible prescaler values which lead to:
* pwm unit = 1us, period/pulse can be from 1us to 65535us
* or
* pwm unit = 500us, period/pulse can be from 500us to ~32.76sec
* Be careful that all the channels of a PWM shares the same prescaler
*/
if (us > 0xFFFF) {
obj->prescaler = 500;
} else {
obj->prescaler = 1;
}
TimHandle.Init.Prescaler = ((SystemCoreClock / 1000000) * obj->prescaler) - 1;
if (TimHandle.Init.Prescaler > 0xFFFF)
error("PWM: out of range prescaler");
TimHandle.Init.Period = (us - 1) / obj->prescaler;
if (TimHandle.Init.Period > 0xFFFF)
error("PWM: out of range period");
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if (HAL_TIM_PWM_Init(&TimHandle) != HAL_OK) {
error("Cannot initialize PWM");
}
// Save for future use
obj->period = us;
// Set duty cycle again
pwmout_write(obj, dc);
__HAL_TIM_ENABLE(&TimHandle);
}
void pwmout_pulsewidth(pwmout_t* obj, float seconds)
{
pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
}
void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
{
pwmout_pulsewidth_us(obj, ms * 1000);
}
void pwmout_pulsewidth_us(pwmout_t* obj, int us)
{
float value = (float)us / (float)obj->period;
pwmout_write(obj, value);
}
#endif

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/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2017, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#ifndef MBED_PWMOUT_DEVICE_H
#define MBED_PWMOUT_DEVICE_H
#include "cmsis.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef DEVICE_PWMOUT
/* L1 HAL do not offer Output Compare idle nor inverted mode*/
#define PWMOUT_INVERTED_NOT_SUPPORTED
typedef enum {
PWMOUT_ON_APB1 = 0,
PWMOUT_ON_APB2 = 1,
PWMOUT_UNKNOWN = 2
} PwmoutApb;
/* Structure to describe Timers to APB */
typedef struct pwm_apb_map {
PWMName pwm; // an index entry for each EXIT line
PwmoutApb pwmoutApb;
} pwm_apb_map_t;
static const pwm_apb_map_t pwm_apb_map_table[] =
{
#if defined(TIM2_BASE)
{PWM_2, PWMOUT_ON_APB1},
#endif
#if defined(TIM3_BASE)
{PWM_3, PWMOUT_ON_APB1},
#endif
#if defined(TIM4_BASE)
{PWM_4, PWMOUT_ON_APB1},
#endif
#if defined(TIM5_BASE)
{PWM_5, PWMOUT_ON_APB1},
#endif
#if defined(TIM9_BASE)
{PWM_9, PWMOUT_ON_APB2},
#endif
#if defined(TIM10_BASE)
{PWM_10, PWMOUT_ON_APB2},
#endif
#if defined(TIM11_BASE)
{PWM_11, PWMOUT_ON_APB2},
#endif
{(PWMName) 0, PWMOUT_UNKNOWN}
};
#endif // DEVICE_PWMOUT
#endif

222
targets/TARGET_STM/TARGET_STM32L4/pwmout_api.c
View File

@ -1,222 +0,0 @@
/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2015, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#include "pwmout_api.h"
#if DEVICE_PWMOUT
#include "cmsis.h"
#include "pinmap.h"
#include "mbed_error.h"
#include "PeripheralPins.h"
static TIM_HandleTypeDef TimHandle;
void pwmout_init(pwmout_t* obj, PinName pin)
{
// Get the peripheral name from the pin and assign it to the object
obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
MBED_ASSERT(obj->pwm != (PWMName)NC);
// Get the pin function and assign the used channel to the object
uint32_t function = pinmap_function(pin, PinMap_PWM);
MBED_ASSERT(function != (uint32_t)NC);
obj->channel = STM_PIN_CHANNEL(function);
obj->inverted = STM_PIN_INVERTED(function);
// Enable TIM clock
if (obj->pwm == PWM_1) __HAL_RCC_TIM1_CLK_ENABLE();
if (obj->pwm == PWM_2) __HAL_RCC_TIM2_CLK_ENABLE();
#if defined(TIM3_BASE)
if (obj->pwm == PWM_3) __HAL_RCC_TIM3_CLK_ENABLE();
#endif
#if defined(TIM4_BASE)
if (obj->pwm == PWM_4) __HAL_RCC_TIM4_CLK_ENABLE();
#endif
#if defined(TIM5_BASE)
if (obj->pwm == PWM_5) __HAL_RCC_TIM5_CLK_ENABLE();
#endif
#if defined(TIM8_BASE)
if (obj->pwm == PWM_8) __HAL_RCC_TIM8_CLK_ENABLE();
#endif
if (obj->pwm == PWM_15) __HAL_RCC_TIM15_CLK_ENABLE();
if (obj->pwm == PWM_16) __HAL_RCC_TIM16_CLK_ENABLE();
#if defined(TIM17_BASE)
if (obj->pwm == PWM_17) __HAL_RCC_TIM17_CLK_ENABLE();
#endif
// Configure GPIO
pinmap_pinout(pin, PinMap_PWM);
obj->pin = pin;
obj->period = 0;
obj->pulse = 0;
obj->prescaler = 1;
pwmout_period_us(obj, 20000); // 20 ms per default
}
void pwmout_free(pwmout_t* obj)
{
// Configure GPIO
pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
}
void pwmout_write(pwmout_t* obj, float value)
{
TIM_OC_InitTypeDef sConfig;
int channel = 0;
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
if (value < (float)0.0) {
value = 0.0;
} else if (value > (float)1.0) {
value = 1.0;
}
obj->pulse = (uint32_t)((float)obj->period * value);
// Configure channels
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.Pulse = obj->pulse / obj->prescaler;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_ENABLE;
sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
switch (obj->channel) {
case 1:
channel = TIM_CHANNEL_1;
break;
case 2:
channel = TIM_CHANNEL_2;
break;
case 3:
channel = TIM_CHANNEL_3;
break;
case 4:
channel = TIM_CHANNEL_4;
break;
default:
return;
}
if (HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel) != HAL_OK) {
error("Cannot initialize PWM\n");
}
if (obj->inverted) {
HAL_TIMEx_PWMN_Start(&TimHandle, channel);
} else {
HAL_TIM_PWM_Start(&TimHandle, channel);
}
}
float pwmout_read(pwmout_t* obj)
{
float value = 0;
if (obj->period > 0) {
value = (float)(obj->pulse) / (float)(obj->period);
}
return ((value > (float)1.0) ? (float)(1.0) : (value));
}
void pwmout_period(pwmout_t* obj, float seconds)
{
pwmout_period_us(obj, seconds * 1000000.0f);
}
void pwmout_period_ms(pwmout_t* obj, int ms)
{
pwmout_period_us(obj, ms * 1000);
}
void pwmout_period_us(pwmout_t* obj, int us)
{
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
float dc = pwmout_read(obj);
__HAL_TIM_DISABLE(&TimHandle);
/* To make it simple, we use to possible prescaler values which lead to:
* pwm unit = 1us, period/pulse can be from 1us to 65535us
* or
* pwm unit = 500us, period/pulse can be from 500us to ~32.76sec
* Be careful that all the channels of a PWM shares the same prescaler
*/
if (us > 0xFFFF) {
obj->prescaler = 500;
} else {
obj->prescaler = 1;
}
TimHandle.Init.Prescaler = ((SystemCoreClock / 1000000) * obj->prescaler) - 1;
if (TimHandle.Init.Prescaler > 0xFFFF)
error("PWM: out of range prescaler");
TimHandle.Init.Period = (us - 1) / obj->prescaler;
if (TimHandle.Init.Period > 0xFFFF)
error("PWM: out of range period");
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if (HAL_TIM_PWM_Init(&TimHandle) != HAL_OK) {
error("Cannot initialize PWM\n");
}
// Save for future use
obj->period = us;
// Set duty cycle again
pwmout_write(obj, dc);
__HAL_TIM_ENABLE(&TimHandle);
}
void pwmout_pulsewidth(pwmout_t* obj, float seconds)
{
pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
}
void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
{
pwmout_pulsewidth_us(obj, ms * 1000);
}
void pwmout_pulsewidth_us(pwmout_t* obj, int us)
{
float value = (float)us / (float)obj->period;
pwmout_write(obj, value);
}
#endif

87
targets/TARGET_STM/TARGET_STM32L4/pwmout_device.h Normal file
View File

@ -0,0 +1,87 @@
/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2017, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#ifndef MBED_PWMOUT_DEVICE_H
#define MBED_PWMOUT_DEVICE_H
#include "cmsis.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef DEVICE_PWMOUT
typedef enum {
PWMOUT_ON_APB1 = 0,
PWMOUT_ON_APB2 = 1,
PWMOUT_UNKNOWN = 2
} PwmoutApb;
/* Structure to describe Timers to APB */
typedef struct pwm_apb_map {
PWMName pwm; // an index entry for each EXIT line
PwmoutApb pwmoutApb;
} pwm_apb_map_t;
static const pwm_apb_map_t pwm_apb_map_table[] =
{
#if defined(TIM2_BASE)
{PWM_2, PWMOUT_ON_APB1},
#endif
#if defined(TIM3_BASE)
{PWM_3, PWMOUT_ON_APB1},
#endif
#if defined(TIM4_BASE)
{PWM_4, PWMOUT_ON_APB1},
#endif
#if defined(TIM5_BASE)
{PWM_5, PWMOUT_ON_APB1},
#endif
#if defined(TIM1_BASE)
{PWM_1, PWMOUT_ON_APB2},
#endif
#if defined(TIM8_BASE)
{PWM_8, PWMOUT_ON_APB2},
#endif
#if defined(TIM15_BASE)
{PWM_15, PWMOUT_ON_APB2},
#endif
#if defined(TIM16_BASE)
{PWM_16, PWMOUT_ON_APB2},
#endif
#if defined(TIM17_BASE)
{PWM_17, PWMOUT_ON_APB2},
#endif
{(PWMName) 0, PWMOUT_UNKNOWN}
};
#endif // DEVICE_PWMOUT
#endif

137
targets/TARGET_STM/TARGET_STM32F4/pwmout_api.c → targets/TARGET_STM/pwmout_api.c
View File

@ -35,6 +35,7 @@
#include "pinmap.h"
#include "mbed_error.h"
#include "PeripheralPins.h"
#include "pwmout_device.h"
static TIM_HandleTypeDef TimHandle;
@ -87,7 +88,30 @@ void pwmout_init(pwmout_t* obj, PinName pin)
#if defined(TIM14_BASE)
if (obj->pwm == PWM_14) __HAL_RCC_TIM14_CLK_ENABLE();
#endif
#if defined(TIM15_BASE)
if (obj->pwm == PWM_15) __HAL_RCC_TIM15_CLK_ENABLE();
#endif
#if defined(TIM16_BASE)
if (obj->pwm == PWM_16) __HAL_RCC_TIM16_CLK_ENABLE();
#endif
#if defined(TIM17_BASE)
if (obj->pwm == PWM_17) __HAL_RCC_TIM17_CLK_ENABLE();
#endif
#if defined(TIM18_BASE)
if (obj->pwm == PWM_18) __HAL_RCC_TIM18_CLK_ENABLE();
#endif
#if defined(TIM19_BASE)
if (obj->pwm == PWM_19) __HAL_RCC_TIM19_CLK_ENABLE();
#endif
#if defined(TIM20_BASE)
if (obj->pwm == PWM_20) __HAL_RCC_TIM20_CLK_ENABLE();
#endif
#if defined(TIM21_BASE)
if (obj->pwm == PWM_21) __HAL_RCC_TIM21_CLK_ENABLE();
#endif
#if defined(TIM22_BASE)
if (obj->pwm == PWM_22) __HAL_RCC_TIM22_CLK_ENABLE();
#endif
// Configure GPIO
pinmap_pinout(pin, PinMap_PWM);
@ -124,10 +148,14 @@ void pwmout_write(pwmout_t* obj, float value)
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.Pulse = obj->pulse / obj->prescaler;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
#if defined(TIM_OCIDLESTATE_RESET)
sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
#endif
#if defined(TIM_OCNIDLESTATE_RESET)
sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
#endif
switch (obj->channel) {
case 1:
@ -150,9 +178,12 @@ void pwmout_write(pwmout_t* obj, float value)
error("Cannot initialize PWM\n");
}
#if !defined(PWMOUT_INVERTED_NOT_SUPPORTED)
if (obj->inverted) {
HAL_TIMEx_PWMN_Start(&TimHandle, channel);
} else {
} else
#endif
{
HAL_TIM_PWM_Start(&TimHandle, channel);
}
}
@ -180,9 +211,10 @@ void pwmout_period_us(pwmout_t* obj, int us)
{
TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
RCC_ClkInitTypeDef RCC_ClkInitStruct;
uint32_t PclkFreq;
uint32_t APBxCLKDivider;
uint32_t PclkFreq = 0;
uint32_t APBxCLKDivider = RCC_HCLK_DIV1;
float dc = pwmout_read(obj);
uint8_t i = 0;
__HAL_TIM_DISABLE(&TimHandle);
@ -190,82 +222,43 @@ void pwmout_period_us(pwmout_t* obj, int us)
// Note: PclkFreq contains here the Latency (not used after)
HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &PclkFreq);
// Get the PCLK and APBCLK divider related to the timer
switch (obj->pwm) {
// APB1 clock
#if defined(TIM2_BASE)
case PWM_2:
#endif
#if defined(TIM3_BASE)
case PWM_3:
#endif
#if defined(TIM4_BASE)
case PWM_4:
#endif
#if defined(TIM5_BASE)
case PWM_5:
#endif
#if defined(TIM12_BASE)
case PWM_12:
#endif
#if defined(TIM13_BASE)
case PWM_13:
#endif
#if defined(TIM14_BASE)
case PWM_14:
#endif
PclkFreq = HAL_RCC_GetPCLK1Freq();
APBxCLKDivider = RCC_ClkInitStruct.APB1CLKDivider;
break;
// APB2 clock
#if defined(TIM1_BASE)
case PWM_1:
#endif
#if defined(TIM8_BASE)
case PWM_8:
#endif
#if defined(TIM9_BASE)
case PWM_9:
#endif
#if defined(TIM10_BASE)
case PWM_10:
#endif
#if defined(TIM11_BASE)
case PWM_11:
#endif
PclkFreq = HAL_RCC_GetPCLK2Freq();
APBxCLKDivider = RCC_ClkInitStruct.APB2CLKDivider;
break;
default:
return;
/* Parse the pwm / apb mapping table to find the right entry */
while(pwm_apb_map_table[i].pwm != obj->pwm) {
i++;
}
/* To make it simple, we use to possible prescaler values which lead to:
* pwm unit = 1us, period/pulse can be from 1us to 65535us
* or
* pwm unit = 500us, period/pulse can be from 500us to ~32.76sec
* Be careful that all the channels of a PWM shares the same prescaler
*/
if (us > 0xFFFF) {
obj->prescaler = 500;
if(pwm_apb_map_table[i].pwm == 0)
error("Unknown PWM instance");
if(pwm_apb_map_table[i].pwmoutApb == PWMOUT_ON_APB1) {
PclkFreq = HAL_RCC_GetPCLK1Freq();
APBxCLKDivider = RCC_ClkInitStruct.APB1CLKDivider;
} else {
obj->prescaler = 1;
#if !defined(PWMOUT_APB2_NOT_SUPPORTED)
PclkFreq = HAL_RCC_GetPCLK2Freq();
APBxCLKDivider = RCC_ClkInitStruct.APB2CLKDivider;
#endif
}
/* By default use, 1us as SW pre-scaler */
obj->prescaler = 1;
// TIMxCLK = PCLKx when the APB prescaler = 1 else TIMxCLK = 2 * PCLKx
if (APBxCLKDivider == RCC_HCLK_DIV1)
TimHandle.Init.Prescaler = (uint16_t)(((PclkFreq) / 1000000) * obj->prescaler) - 1; // 1 us tick
TimHandle.Init.Prescaler = (((PclkFreq) / 1000000)) - 1; // 1 us tick
else
TimHandle.Init.Prescaler = (uint16_t)(((PclkFreq * 2) / 1000000) * obj->prescaler) - 1; // 1 us tick
TimHandle.Init.Prescaler = (((PclkFreq * 2) / 1000000)) - 1; // 1 us tick
TimHandle.Init.Period = (us - 1);
if (TimHandle.Init.Prescaler > 0xFFFF)
error("PWM: out of range prescaler");
TimHandle.Init.Period = (us - 1) / obj->prescaler;
if (TimHandle.Init.Period > 0xFFFF)
error("PWM: out of range period");
/* In case period or pre-scalers are out of range, loop-in to get valid values */
while ((TimHandle.Init.Period > 0xFFFF) || (TimHandle.Init.Period > 0xFFFF)) {
obj->prescaler = obj->prescaler * 2;
if (APBxCLKDivider == RCC_HCLK_DIV1)
TimHandle.Init.Prescaler = (((PclkFreq) / 1000000) * obj->prescaler) - 1;
else
TimHandle.Init.Prescaler = (((PclkFreq * 2) / 1000000) * obj->prescaler) - 1;
TimHandle.Init.Period = (us - 1) / obj->prescaler;
}
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;