84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
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/*
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* stm32f4_pwm.c
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*
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* Created on: Aug 9, 2016
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* Author: tkl
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*/
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#include <stdint.h>
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#include <stddef.h>
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#include "stm32f4xx.h"
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#include "gpio.h"
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#include "stm32f4_gpio.h"
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#include "pwm.h"
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#include "stm32f4_pwm.h"
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#pragma pack(push)
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#pragma pack(1)
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struct stm32f4_pwm_object {
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uint8_t used_channels;
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uint32_t channel_1_max_period;
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uint32_t channel_2_max_period;
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uint32_t channel_3_max_period;
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uint32_t channel_4_max_period;
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};
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#pragma pack(pop)
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int stm32f4_pwm_open(const void *pwm)
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{
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if(NULL == pwm)
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return -1;
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struct stm32f4_pwm *this = (struct stm32f4_pwm *)pwm;
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stm32f4_gpio_open(this->pwm_gpio);
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if(this->timer_handle->Instance == TIM4) {
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__HAL_RCC_TIM4_CLK_ENABLE();
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}
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HAL_TIM_PWM_Init(this->timer_handle);
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HAL_TIM_PWM_ConfigChannel(this->timer_handle, this->output_compare_cfg, this->channel);
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TIM_MasterConfigTypeDef sMasterConfig;
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sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
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sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
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HAL_TIMEx_MasterConfigSynchronization(this->timer_handle, &sMasterConfig);
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TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig;
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sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
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sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
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sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
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sBreakDeadTimeConfig.DeadTime = 0;
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sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
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sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
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sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
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HAL_TIMEx_ConfigBreakDeadTime(this->timer_handle, &sBreakDeadTimeConfig);
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HAL_TIM_Base_Start(this->timer_handle);
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HAL_TIM_PWM_Start(this->timer_handle, this->channel);
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return 0;
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}
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int stm32f4_pwm_close(const void *pwm)
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{
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if(NULL == pwm)
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return -1;
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stm32f4_pwm_set_duty_cycle(pwm, 0);
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struct stm32f4_pwm *this = (struct stm32f4_pwm *)pwm;
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HAL_TIM_Base_Stop(this->timer_handle);
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HAL_TIM_PWM_Stop(this->timer_handle, this->channel);
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return 0;
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}
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int stm32f4_pwm_set_duty_cycle(const void *pwm, unsigned int duty_cycle_percent)
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{
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if(NULL == pwm)
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return -1;
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struct stm32f4_pwm *this = (struct stm32f4_pwm *)pwm;
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__HAL_TIM_SET_COMPARE(this->timer_handle, this->channel, this->timer_handle->Init.Period * duty_cycle_percent / 100);
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return 0;
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}
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