[NANO130] Support PWM

pull/4631/head
MS30 CCChang12 2017-04-21 13:21:46 +08:00
parent 3f09447ded
commit 3be0aaf8aa
4 changed files with 235 additions and 2 deletions

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@ -37,6 +37,25 @@ uint32_t PWM_ConfigOutputChannel (PWM_T *pwm,
uint32_t u32ChannelNum, uint32_t u32ChannelNum,
uint32_t u32Frequency, uint32_t u32Frequency,
uint32_t u32DutyCycle) uint32_t u32DutyCycle)
{
return PWM_ConfigOutputChannel2(pwm, u32ChannelNum, u32Frequency, u32DutyCycle, 1);
}
/**
* @brief This function config PWM generator and get the nearest frequency in edge aligned auto-reload mode
* @param[in] pwm The base address of PWM module
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~5
* @param[in] u32Frequency Target generator frequency
* @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 100. 10 means 10%, 20 means 20%...
* @return Nearest frequency clock in nano second
* @note Since every two channels, (0 & 1), (2 & 3), (4 & 5), shares a prescaler. Call this API to configure PWM frequency may affect
* existing frequency of other channel.
*/
uint32_t PWM_ConfigOutputChannel2 (PWM_T *pwm,
uint32_t u32ChannelNum,
uint32_t u32Frequency,
uint32_t u32DutyCycle,
uint32_t u32Frequency2)
{ {
uint32_t i; uint32_t i;
uint32_t u32ClkSrc; uint32_t u32ClkSrc;
@ -66,7 +85,8 @@ uint32_t PWM_ConfigOutputChannel (PWM_T *pwm,
} }
for(; u8Divider < 17; u8Divider <<= 1) { // clk divider could only be 1, 2, 4, 8, 16 for(; u8Divider < 17; u8Divider <<= 1) { // clk divider could only be 1, 2, 4, 8, 16
i = (u32PWM_Clock / u32Frequency) / u8Divider; // Note: Support frequency < 1
i = (uint64_t) u32PWM_Clock * u32Frequency2 / u32Frequency / u8Divider;
// If target value is larger than CNR * prescale, need to use a larger divider // If target value is larger than CNR * prescale, need to use a larger divider
if(i > (0x10000 * 0x100)) if(i > (0x10000 * 0x100))
continue; continue;

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@ -165,6 +165,11 @@ uint32_t PWM_ConfigOutputChannel(PWM_T *pwm,
uint32_t u32ChannelNum, uint32_t u32ChannelNum,
uint32_t u32Frequency, uint32_t u32Frequency,
uint32_t u32DutyCycle); uint32_t u32DutyCycle);
uint32_t PWM_ConfigOutputChannel2(PWM_T *pwm,
uint32_t u32ChannelNum,
uint32_t u32Frequency,
uint32_t u32DutyCycle,
uint32_t u32Frequency2);
uint32_t PWM_ConfigCaptureChannel (PWM_T *pwm, uint32_t PWM_ConfigCaptureChannel (PWM_T *pwm,
uint32_t u32ChannelNum, uint32_t u32ChannelNum,
uint32_t u32UnitTimeNsec, uint32_t u32UnitTimeNsec,

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@ -0,0 +1,208 @@
/* mbed Microcontroller Library
* Copyright (c) 2015-2017 Nuvoton
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "pwmout_api.h"
#if DEVICE_PWMOUT
#include "cmsis.h"
#include "pinmap.h"
#include "PeripheralPins.h"
#include "nu_modutil.h"
#include "nu_miscutil.h"
#include "nu_bitutil.h"
struct nu_pwm_var {
uint32_t en_msk;
};
static struct nu_pwm_var pwm0_01_var = {
.en_msk = 0
};
static struct nu_pwm_var pwm0_23_var = {
.en_msk = 0
};
static struct nu_pwm_var pwm1_01_var = {
.en_msk = 0
};
static struct nu_pwm_var pwm1_23_var = {
.en_msk = 0
};
static uint32_t pwm_modinit_mask = 0;
static const struct nu_modinit_s pwm_modinit_tab[] = {
{PWM_0_0, PWM0_CH01_MODULE, CLK_CLKSEL1_PWM0_CH01_S_HCLK, 0, PWM0_RST, PWM0_IRQn, &pwm0_01_var},
{PWM_0_1, PWM0_CH01_MODULE, CLK_CLKSEL1_PWM0_CH01_S_HCLK, 0, PWM0_RST, PWM0_IRQn, &pwm0_01_var},
{PWM_0_2, PWM0_CH23_MODULE, CLK_CLKSEL1_PWM0_CH23_S_HCLK, 0, PWM0_RST, PWM0_IRQn, &pwm0_23_var},
{PWM_0_3, PWM0_CH23_MODULE, CLK_CLKSEL1_PWM0_CH23_S_HCLK, 0, PWM0_RST, PWM0_IRQn, &pwm0_23_var},
{PWM_1_0, PWM1_CH01_MODULE, CLK_CLKSEL2_PWM1_CH01_S_HCLK, 0, PWM1_RST, PWM1_IRQn, &pwm1_01_var},
{PWM_1_1, PWM1_CH01_MODULE, CLK_CLKSEL2_PWM1_CH01_S_HCLK, 0, PWM1_RST, PWM1_IRQn, &pwm1_01_var},
{PWM_1_2, PWM1_CH23_MODULE, CLK_CLKSEL2_PWM1_CH23_S_HCLK, 0, PWM1_RST, PWM1_IRQn, &pwm1_23_var},
{PWM_1_3, PWM1_CH23_MODULE, CLK_CLKSEL2_PWM1_CH23_S_HCLK, 0, PWM1_RST, PWM1_IRQn, &pwm1_23_var},
{NC, 0, 0, 0, 0, (IRQn_Type) 0, NULL}
};
static void pwmout_config(pwmout_t* obj);
void pwmout_init(pwmout_t* obj, PinName pin)
{
obj->pwm = (PWMName) pinmap_peripheral(pin, PinMap_PWM);
MBED_ASSERT((int) obj->pwm != NC);
const struct nu_modinit_s *modinit = get_modinit(obj->pwm, pwm_modinit_tab);
MBED_ASSERT(modinit != NULL);
MBED_ASSERT(modinit->modname == obj->pwm);
PWM_T *pwm_base = (PWM_T *) NU_MODBASE(obj->pwm);
uint32_t chn = NU_MODSUBINDEX(obj->pwm);
// NOTE: Channels 0/1, 2/3 share a clock source.
if ((((struct nu_pwm_var *) modinit->var)->en_msk & 0xF) == 0) {
// Select clock source of paired channels
CLK_SetModuleClock(modinit->clkidx, modinit->clksrc, modinit->clkdiv);
// Enable clock of paired channels
CLK_EnableModuleClock(modinit->clkidx);
}
// Wire pinout
pinmap_pinout(pin, PinMap_PWM);
// Default: period = 10 ms, pulse width = 0 ms
obj->period_us = 1000 * 10;
obj->pulsewidth_us = 0;
pwmout_config(obj);
// Enable output of the specified PWM channel
PWM_EnableOutput(pwm_base, 1 << chn);
PWM_Start(pwm_base, 1 << chn);
((struct nu_pwm_var *) modinit->var)->en_msk |= 1 << chn;
if (((struct nu_pwm_var *) modinit->var)->en_msk) {
// Mark this module to be inited.
int i = modinit - pwm_modinit_tab;
pwm_modinit_mask |= 1 << i;
}
}
void pwmout_free(pwmout_t* obj)
{
PWM_T *pwm_base = (PWM_T *) NU_MODBASE(obj->pwm);
uint32_t chn = NU_MODSUBINDEX(obj->pwm);
PWM_ForceStop(pwm_base, 1 << chn);
const struct nu_modinit_s *modinit = get_modinit(obj->pwm, pwm_modinit_tab);
MBED_ASSERT(modinit != NULL);
MBED_ASSERT(modinit->modname == obj->pwm);
((struct nu_pwm_var *) modinit->var)->en_msk &= ~(1 << chn);
if ((((struct nu_pwm_var *) modinit->var)->en_msk & 0xF) == 0) {
CLK_DisableModuleClock(modinit->clkidx);
}
if (((struct nu_pwm_var *) modinit->var)->en_msk == 0) {
// Mark this module to be deinited.
int i = modinit - pwm_modinit_tab;
pwm_modinit_mask &= ~(1 << i);
}
}
void pwmout_write(pwmout_t* obj, float value)
{
obj->pulsewidth_us = NU_CLAMP((uint32_t) (value * obj->period_us), 0, obj->period_us);
pwmout_config(obj);
}
float pwmout_read(pwmout_t* obj)
{
return NU_CLAMP((((float) obj->pulsewidth_us) / obj->period_us), 0.0f, 1.0f);
}
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);
}
// Set the PWM period, keeping the duty cycle the same.
void pwmout_period_us(pwmout_t* obj, int us)
{
uint32_t period_us_old = obj->period_us;
uint32_t pulsewidth_us_old = obj->pulsewidth_us;
obj->period_us = us;
obj->pulsewidth_us = NU_CLAMP(obj->period_us * pulsewidth_us_old / period_us_old, 0, obj->period_us);
pwmout_config(obj);
}
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)
{
obj->pulsewidth_us = NU_CLAMP(us, 0, obj->period_us);
pwmout_config(obj);
}
int pwmout_allow_powerdown(void)
{
uint32_t modinit_mask = pwm_modinit_mask;
#if 0
while (modinit_mask) {
int pwm_idx = nu_ctz(modinit_mask);
const struct nu_modinit_s *modinit = pwm_modinit_tab + pwm_idx;
if (modinit->modname != NC) {
PWM_T *pwm_base = (PWM_T *) NU_MODBASE(modinit->modname);
uint32_t chn = NU_MODSUBINDEX(modinit->modname);
// Disallow entering power-down mode if PWM counter is enabled.
if ((pwm_base->CNTEN & (1 << chn)) && pwm_base->CMPDAT[chn]) {
return 0;
}
}
modinit_mask &= ~(1 << pwm_idx);
}
#endif
return 1;
}
static void pwmout_config(pwmout_t* obj)
{
PWM_T *pwm_base = (PWM_T *) NU_MODBASE(obj->pwm);
uint32_t chn = NU_MODSUBINDEX(obj->pwm);
// NOTE: Support period < 1s
//PWM_ConfigOutputChannel(pwm_base, chn, 1000 * 1000 / obj->period_us, obj->pulsewidth_us * 100 / obj->period_us);
PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, obj->pulsewidth_us * 100 / obj->period_us, obj->period_us);
}
#endif

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@ -2633,7 +2633,7 @@
"supported_toolchains": ["ARM", "uARM", "GCC_ARM", "IAR"], "supported_toolchains": ["ARM", "uARM", "GCC_ARM", "IAR"],
"inherits": ["Target"], "inherits": ["Target"],
"progen": {"target": "numaker-pfm-nano130"}, "progen": {"target": "numaker-pfm-nano130"},
"device_has": ["I2C", "I2CSLAVE", "I2C_ASYNCH", "INTERRUPTIN", "LOWPOWERTIMER", "PORTIN", "PORTINOUT", "PORTOUT", "RTC", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "STDIO_MESSAGES", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH"], "device_has": ["I2C", "I2CSLAVE", "I2C_ASYNCH", "INTERRUPTIN", "LOWPOWERTIMER", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "STDIO_MESSAGES", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH"],
"release_versions": ["5"], "release_versions": ["5"],
"device_name": "NANO130KE3BN" "device_name": "NANO130KE3BN"
}, },