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mbed-os/targets/TARGET_STM/pinmap.c

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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.
*******************************************************************************
*/
#include "mbed_assert.h"
#include "pinmap.h"
#include "PortNames.h"
#include "mbed_error.h"
#include "pin_device.h"
extern GPIO_TypeDef *Set_GPIO_Clock(uint32_t port_idx);
#if defined(DUAL_PAD) // STM32H7
typedef struct {
PinName pin;
uint32_t LL_AnalogSwitch;
} PinAnalogSwitch;
const PinAnalogSwitch PinMapAnalogSwitch[] = {
{PA_0, LL_SYSCFG_ANALOG_SWITCH_PA0},
{PA_1, LL_SYSCFG_ANALOG_SWITCH_PA1},
{PC_2, LL_SYSCFG_ANALOG_SWITCH_PC2},
{PC_3, LL_SYSCFG_ANALOG_SWITCH_PC3},
{NC, 0}
};
/**
* Configure Analog dualpad switch if necessary
* LL_AnalogSwitch: LL define to be used to configure Analog switch
*/
static void configure_dualpad_switch(PinName pin, int function, uint32_t LL_AnalogSwitch)
{
if (LL_AnalogSwitch == 0) {
return ;
}
if (((function & STM_MODE_ANALOG) != STM_MODE_ANALOG)
&& ((pin & DUAL_PAD) == DUAL_PAD)) {
/**
* We don't configure an analog function but the pin is an analog pad
* Pxy_C. In this cases Analog switch should be closed
*/
LL_SYSCFG_CloseAnalogSwitch(LL_AnalogSwitch);
return ;
} else {
/**
* Either we configure an analog function,
* or it is not an analog function but it is not an analog pad Pxy_C.
* In both cases Analog switch should be opened
* Note: direct ADC is restricted to Pxy_C, pin only
*/
LL_SYSCFG_OpenAnalogSwitch(LL_AnalogSwitch);
return ;
}
}
/**
* In case of dual pad, determine whether gpio needs to be configured
* pLL_AnalogSwitch: pointer used to retrun LL define to be used to configure
* Analog switch
* return: true when gpio must be configured
*/
static bool is_dualpad_switch_gpio_configurable(PinName pin, int function, uint32_t *pLL_AnalogSwitch)
{
PinAnalogSwitch *AnalogSwitch = (PinAnalogSwitch *) PinMapAnalogSwitch;
/* Read through PinMapAnalogSwitch array */
while (AnalogSwitch->pin != NC) {
/* Check whether pin is or is associated to dualpad Analog Input */
if ((AnalogSwitch->pin | DUAL_PAD) == (pin | DUAL_PAD)) {
*pLL_AnalogSwitch = AnalogSwitch->LL_AnalogSwitch;
if (((function & STM_MODE_ANALOG) == STM_MODE_ANALOG)
&& ((pin & DUAL_PAD) == DUAL_PAD)) {
/**
* We configure an analog function and the pin is an analog pad Pxy_C
* In this case gpio configuration must be skipped
*/
return false;
} else {
return true;
}
}
AnalogSwitch ++;
}
*pLL_AnalogSwitch = 0;
return true;
}
#endif /* DUAL_PAD */
const uint32_t ll_pin_defines[16] = {
LL_GPIO_PIN_0,
LL_GPIO_PIN_1,
LL_GPIO_PIN_2,
LL_GPIO_PIN_3,
LL_GPIO_PIN_4,
LL_GPIO_PIN_5,
LL_GPIO_PIN_6,
LL_GPIO_PIN_7,
LL_GPIO_PIN_8,
LL_GPIO_PIN_9,
LL_GPIO_PIN_10,
LL_GPIO_PIN_11,
LL_GPIO_PIN_12,
LL_GPIO_PIN_13,
LL_GPIO_PIN_14,
LL_GPIO_PIN_15
};
/**
* Configure pin (mode, speed, output type and pull-up/pull-down)
*/
void pin_function(PinName pin, int data)
{
if (pin == NC) {
return;
}
// Get the pin informations
uint32_t mode = STM_PIN_FUNCTION(data);
uint32_t afnum = STM_PIN_AFNUM(data);
uint32_t speed = STM_PIN_SPEED(data);
uint32_t port = STM_PORT(pin);
uint32_t ll_pin = ll_pin_defines[STM_PIN(pin)];
uint32_t ll_mode = 0;
#if defined(DUAL_PAD)
uint32_t LL_AnalogSwitch = 0;
if (!is_dualpad_switch_gpio_configurable(pin, data, &LL_AnalogSwitch)) {
/* Skip gpio configuration */
configure_dualpad_switch(pin, data, LL_AnalogSwitch);
return;
}
#endif /* DUAL_PAD */
// Enable GPIO clock
GPIO_TypeDef *const gpio = Set_GPIO_Clock(port);
/* Set default speed to high.
* For most families there are dedicated registers so it is
* not so important, register can be set at any time.
* But for families like F1, speed only applies to output.
*/
#if defined (TARGET_STM32F1)
if (mode == STM_PIN_OUTPUT) {
#endif
#if defined(DUAL_CORE) && (TARGET_STM32H7)
while (LL_HSEM_1StepLock(HSEM, CFG_HW_GPIO_SEMID)) {
}
#endif /* DUAL_CORE */
switch (speed) {
/* Default value for backward compatibility */
case STM_PIN_SPEED_MASK:
#if defined (LL_GPIO_SPEED_FREQ_VERY_HIGH)
LL_GPIO_SetPinSpeed(gpio, ll_pin, LL_GPIO_SPEED_FREQ_VERY_HIGH);
#else
LL_GPIO_SetPinSpeed(gpio, ll_pin, LL_GPIO_SPEED_FREQ_HIGH);
#endif
break;
default:
LL_GPIO_SetPinSpeed(gpio, ll_pin, speed);
break;
}
#if defined(DUAL_CORE) && (TARGET_STM32H7)
LL_HSEM_ReleaseLock(HSEM, CFG_HW_GPIO_SEMID, HSEM_CR_COREID_CURRENT);
#endif /* DUAL_CORE */
#if defined (TARGET_STM32F1)
}
#endif
switch (mode) {
case STM_PIN_INPUT:
ll_mode = LL_GPIO_MODE_INPUT;
break;
case STM_PIN_OUTPUT:
ll_mode = LL_GPIO_MODE_OUTPUT;
break;
case STM_PIN_ALTERNATE:
ll_mode = LL_GPIO_MODE_ALTERNATE;
// In case of ALT function, also set he afnum
stm_pin_SetAFPin(gpio, pin, afnum);
break;
case STM_PIN_ANALOG:
ll_mode = LL_GPIO_MODE_ANALOG;
break;
default:
MBED_ASSERT(0);
break;
}
#if defined(DUAL_CORE) && (TARGET_STM32H7)
while (LL_HSEM_1StepLock(HSEM, CFG_HW_GPIO_SEMID)) {
}
#endif /* DUAL_CORE */
LL_GPIO_SetPinMode(gpio, ll_pin, ll_mode);
#if defined(GPIO_ASCR_ASC0)
/* For families where Analog Control ASC0 register is present */
if (STM_PIN_ANALOG_CONTROL(data)) {
LL_GPIO_EnablePinAnalogControl(gpio, ll_pin);
} else {
LL_GPIO_DisablePinAnalogControl(gpio, ll_pin);
}
#endif
/* For now by default use Speed HIGH for output or alt modes */
if ((mode == STM_PIN_OUTPUT) || (mode == STM_PIN_ALTERNATE)) {
if (STM_PIN_OD(data)) {
LL_GPIO_SetPinOutputType(gpio, ll_pin, LL_GPIO_OUTPUT_OPENDRAIN);
} else {
LL_GPIO_SetPinOutputType(gpio, ll_pin, LL_GPIO_OUTPUT_PUSHPULL);
}
}
stm_pin_PullConfig(gpio, ll_pin, STM_PIN_PUPD(data));
#if defined(DUAL_PAD)
configure_dualpad_switch(pin, data, LL_AnalogSwitch);
#endif /* DUAL_PAD */
stm_pin_DisconnectDebug(pin);
#if defined(DUAL_CORE) && (TARGET_STM32H7)
LL_HSEM_ReleaseLock(HSEM, CFG_HW_GPIO_SEMID, HSEM_CR_COREID_CURRENT);
#endif /* DUAL_CORE */
}
/**
* Configure pin pull-up/pull-down
*/
void pin_mode(PinName pin, PinMode mode)
{
if (pin == NC) {
return;
}
uint32_t port_index = STM_PORT(pin);
uint32_t ll_pin = ll_pin_defines[STM_PIN(pin)];
// Enable GPIO clock
GPIO_TypeDef *gpio = Set_GPIO_Clock(port_index);
#if defined(DUAL_CORE) && (TARGET_STM32H7)
while (LL_HSEM_1StepLock(HSEM, CFG_HW_GPIO_SEMID)) {
}
#endif /* DUAL_CORE */
uint32_t function = LL_GPIO_GetPinMode(gpio, ll_pin);
if ((function == LL_GPIO_MODE_OUTPUT) || (function == LL_GPIO_MODE_ALTERNATE)) {
if ((mode == OpenDrainNoPull) || (mode == OpenDrainPullUp) || (mode == OpenDrainPullDown)) {
LL_GPIO_SetPinOutputType(gpio, ll_pin, LL_GPIO_OUTPUT_OPENDRAIN);
} else {
LL_GPIO_SetPinOutputType(gpio, ll_pin, LL_GPIO_OUTPUT_PUSHPULL);
}
}
if ((mode == OpenDrainPullUp) || (mode == PullUp)) {
stm_pin_PullConfig(gpio, ll_pin, GPIO_PULLUP);
} else if ((mode == OpenDrainPullDown) || (mode == PullDown)) {
stm_pin_PullConfig(gpio, ll_pin, GPIO_PULLDOWN);
} else {
stm_pin_PullConfig(gpio, ll_pin, GPIO_NOPULL);
}
#if defined(DUAL_CORE) && (TARGET_STM32H7)
LL_HSEM_ReleaseLock(HSEM, CFG_HW_GPIO_SEMID, HSEM_CR_COREID_CURRENT);
#endif /* DUAL_CORE */
}
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