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This commit is contained in:
tkl 2016-08-09 12:28:01 +02:00
parent d14354e47c
commit b80a44a4d9
5 changed files with 128 additions and 34 deletions
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12
source/firmware/arch/stm32f4xx/driver/include/stm32f4_pwm.h
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@ -27,8 +27,14 @@ struct stm32f4_pwm {
};
int stm32f4_pwm_open(struct stm32f4_pwm *pwm);
int stm32f4_pwm_close(struct stm32f4_pwm *pwm);
int stm32f4_pwm_set_duty_cycle(struct stm32f4_pwm *pwm, unsigned int duty_cycle_percent);
int stm32f4_pwm_open(const void *pwm);
int stm32f4_pwm_close(const void *pwm);
int stm32f4_pwm_set_duty_cycle(const void *pwm, unsigned int duty_cycle_percent);
static const struct pwm_fp stm32f4_pwm_fp = {
.open = stm32f4_pwm_open,
.close = stm32f4_pwm_close,
.set_duty_cycle = stm32f4_pwm_set_duty_cycle,
};
#endif /* SOURCE_FIRMWARE_ARCH_STM32F4XX_DRIVER_INCLUDE_STM32F4_PWM_H_ */

72
source/firmware/arch/stm32f4xx/driver/stm32f4_pwm.c
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@ -5,8 +5,11 @@
* Author: tkl
*/
#include <stdint.h>
#include <stddef.h>
#include "stm32f4xx.h"
#include "pwm.h"
#include "stm32f4_pwm.h"
struct stm32f4_pwm_object {
@ -25,75 +28,86 @@ static struct stm32f4_pwm_object stm32f4_pwm_object = {
.channel_4_max_period = 0,
};
int stm32f4_pwm_open(struct stm32f4_pwm *pwm)
int stm32f4_pwm_open(const void *pwm)
{
if(NULL == pwm)
return -1;
struct stm32f4_pwm *this = (struct stm32f4_pwm *)pwm;
uint32_t clk_ahb_timer = 0, clk_ahb_gpio = 0;
uint8_t gpio_af_timer = 0;
if(pwm->timer == TIM4) {
if(this->timer == TIM4) {
clk_ahb_timer = RCC_APB1Periph_TIM4;
gpio_af_timer = GPIO_AF_TIM4;
}
RCC_APB1PeriphClockCmd(clk_ahb_timer, ENABLE);
if(pwm->port == GPIOD) {
if(this->port == GPIOD) {
clk_ahb_gpio = RCC_AHB1Periph_GPIOD;
}
RCC_AHB1PeriphClockCmd(clk_ahb_gpio, ENABLE);
GPIO_Init(pwm->port, (GPIO_InitTypeDef *)pwm->port_cfg);
GPIO_PinAFConfig(pwm->port, pwm->pin_src, gpio_af_timer);
GPIO_Init(this->port, (GPIO_InitTypeDef *)this->port_cfg);
GPIO_PinAFConfig(this->port, this->pin_src, gpio_af_timer);
TIM_TimeBaseInit(pwm->timer, (TIM_TimeBaseInitTypeDef *)pwm->timer_cfg);
TIM_TimeBaseInit(this->timer, (TIM_TimeBaseInitTypeDef *)this->timer_cfg);
switch(pwm->channel) {
switch(this->channel) {
case channel_1:
TIM_OC1Init(pwm->timer, (TIM_OCInitTypeDef *)pwm->output_compare_cfg);
TIM_OC1PreloadConfig(pwm->timer, TIM_OCPreload_Enable);
stm32f4_pwm_object.channel_1_max_period = pwm->timer_cfg->TIM_Period + 1;
TIM_OC1Init(this->timer, (TIM_OCInitTypeDef *)this->output_compare_cfg);
TIM_OC1PreloadConfig(this->timer, TIM_OCPreload_Enable);
stm32f4_pwm_object.channel_1_max_period = this->timer_cfg->TIM_Period + 1;
break;
case channel_2:
TIM_OC2Init(pwm->timer, (TIM_OCInitTypeDef *)pwm->output_compare_cfg);
TIM_OC2PreloadConfig(pwm->timer, TIM_OCPreload_Enable);
stm32f4_pwm_object.channel_2_max_period = pwm->timer_cfg->TIM_Period + 1;
TIM_OC2Init(this->timer, (TIM_OCInitTypeDef *)this->output_compare_cfg);
TIM_OC2PreloadConfig(this->timer, TIM_OCPreload_Enable);
stm32f4_pwm_object.channel_2_max_period = this->timer_cfg->TIM_Period + 1;
break;
case channel_3:
TIM_OC3Init(pwm->timer, (TIM_OCInitTypeDef *)pwm->output_compare_cfg);
TIM_OC3PreloadConfig(pwm->timer, TIM_OCPreload_Enable);
stm32f4_pwm_object.channel_3_max_period = pwm->timer_cfg->TIM_Period + 1;
TIM_OC3Init(this->timer, (TIM_OCInitTypeDef *)this->output_compare_cfg);
TIM_OC3PreloadConfig(this->timer, TIM_OCPreload_Enable);
stm32f4_pwm_object.channel_3_max_period = this->timer_cfg->TIM_Period + 1;
break;
case channel_4:
TIM_OC4Init(pwm->timer, (TIM_OCInitTypeDef *)pwm->output_compare_cfg);
TIM_OC4PreloadConfig(pwm->timer, TIM_OCPreload_Enable);
stm32f4_pwm_object.channel_4_max_period = pwm->timer_cfg->TIM_Period + 1;
TIM_OC4Init(this->timer, (TIM_OCInitTypeDef *)this->output_compare_cfg);
TIM_OC4PreloadConfig(this->timer, TIM_OCPreload_Enable);
stm32f4_pwm_object.channel_4_max_period = this->timer_cfg->TIM_Period + 1;
break;
}
TIM_ARRPreloadConfig(pwm->timer, ENABLE);
TIM_Cmd(pwm->timer, ENABLE);
TIM_ARRPreloadConfig(this->timer, ENABLE);
TIM_Cmd(this->timer, ENABLE);
stm32f4_pwm_object.used_channels++;
return 0;
}
int stm32f4_pwm_close(struct stm32f4_pwm *pwm)
int stm32f4_pwm_close(const void *pwm)
{
if(NULL == pwm)
return -1;
struct stm32f4_pwm *this = (struct stm32f4_pwm *)pwm;
stm32f4_pwm_set_duty_cycle(pwm, 0);
stm32f4_pwm_object.used_channels--;
if(stm32f4_pwm_object.used_channels == 0) {
TIM_Cmd(pwm->timer, DISABLE);
TIM_Cmd(this->timer, DISABLE);
}
return 0;
}
int stm32f4_pwm_set_duty_cycle(struct stm32f4_pwm *pwm, unsigned int duty_cycle_percent)
int stm32f4_pwm_set_duty_cycle(const void *pwm, unsigned int duty_cycle_percent)
{
switch(pwm->channel) {
if(NULL == pwm)
return -1;
struct stm32f4_pwm *this = (struct stm32f4_pwm *)pwm;
switch(this->channel) {
case channel_1:
TIM_SetCompare1(pwm->timer, stm32f4_pwm_object.channel_1_max_period * duty_cycle_percent / 100);
TIM_SetCompare1(this->timer, stm32f4_pwm_object.channel_1_max_period * duty_cycle_percent / 100);
break;
case channel_2:
TIM_SetCompare2(pwm->timer, stm32f4_pwm_object.channel_2_max_period * duty_cycle_percent / 100);
TIM_SetCompare2(this->timer, stm32f4_pwm_object.channel_2_max_period * duty_cycle_percent / 100);
break;
case channel_3:
TIM_SetCompare3(pwm->timer, stm32f4_pwm_object.channel_3_max_period * duty_cycle_percent / 100);
TIM_SetCompare3(this->timer, stm32f4_pwm_object.channel_3_max_period * duty_cycle_percent / 100);
break;
case channel_4:
TIM_SetCompare4(pwm->timer, stm32f4_pwm_object.channel_4_max_period * duty_cycle_percent / 100);
TIM_SetCompare4(this->timer, stm32f4_pwm_object.channel_4_max_period * duty_cycle_percent / 100);
break;
}
return 0;
}

35
source/firmware/kernel/driver/include/pwm.h Normal file
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@ -0,0 +1,35 @@
/*
* pwm.h
*
* Created on: Aug 9, 2016
* Author: tkl
*/
#ifndef SOURCE_FIRMWARE_KERNEL_DRIVER_INCLUDE_PWM_H_
#define SOURCE_FIRMWARE_KERNEL_DRIVER_INCLUDE_PWM_H_
//! \brief Function pointer to the open function.
typedef int (*pwm_fp_open_t)(const void*);
//! \brief Function pointer to the close function.
typedef int (*pwm_fp_close_t)(const void*);
//! \brief Function pointer to the read function.
typedef int (*pwm_fp_set_duty_cycle_t)(const void*, unsigned int duty_cycle_percent);
struct pwm_fp {
const pwm_fp_open_t open;
const pwm_fp_close_t close;
const pwm_fp_set_duty_cycle_t set_duty_cycle;
};
struct pwm {
const void *arch_dep_device; //!< Architecture depended pwm device (i.e. stm32f10x_pwm_t).
const struct pwm_fp *fp; //!< Function pointer for the pwm driver access.
};
int pwm_open(const struct pwm *device);
int pwm_close(const struct pwm *device);
int pwm_set_duty_cycle(const struct pwm *device, unsigned int duty_cycle_percent);
#endif /* SOURCE_FIRMWARE_KERNEL_DRIVER_INCLUDE_PWM_H_ */

33
source/firmware/kernel/driver/pwm.c Normal file
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@ -0,0 +1,33 @@
/*
* pwm.c
*
* Created on: Aug 9, 2016
* Author: tkl
*/
#include <stddef.h>
#include <pwm.h>
int pwm_open(const struct pwm *device)
{
if(NULL == device)
return -1;
pwm_fp_open_t open = device->fp->open;
return open(device->arch_dep_device);
}
int pwm_close(const struct pwm *device)
{
if(NULL == device)
return -1;
pwm_fp_close_t close = device->fp->close;
return close(device->arch_dep_device);
}
int pwm_set_duty_cycle(const struct pwm *device, unsigned int duty_cycle_percent)
{
if(NULL == device)
return -1;
pwm_fp_set_duty_cycle_t set = device->fp->set_duty_cycle;
return set(device->arch_dep_device, duty_cycle_percent);
}

10
source/test/pwm/main.c
View File

@ -17,6 +17,8 @@
#include "shell.h"
#include "stm32f4xx.h"
#include "pwm.h"
#include "stm32f4_pwm.h"
/* apb1 clock = 84MHz */
@ -59,6 +61,10 @@ static struct stm32f4_pwm str32f4_pwm = {
.channel = channel_4,
};
static const struct pwm pwm_ch4 = {
.arch_dep_device = &str32f4_pwm,
.fp = &stm32f4_pwm_fp,
};
#define TH_STACK_SIZE 256
stack_t th_stack[TH_STACK_SIZE];
@ -66,8 +72,9 @@ struct thread_context th_ctx;
static void th_func(void *arg)
{
unsigned int duty = 0;
pwm_open(&pwm_ch4);
while(1) {
stm32f4_pwm_set_duty_cycle(&str32f4_pwm, duty);
pwm_set_duty_cycle(&pwm_ch4, duty);
sleep_ms(100);
duty++;
if(duty > 100)
@ -77,7 +84,6 @@ static void th_func(void *arg)
int main(void)
{
stm32f4_pwm_open(&str32f4_pwm);
thread_create(&th_ctx, th_stack, TH_STACK_SIZE, th_func, NULL, THREAD_PRIO_LOW);
schedule_start();