STM32_RFDA4005/Core/Src/RFDAproto.c

#include "RFDAproto.h"
#include "usbd_cdc_if.h"

#define RFDA_TIM TIM1 //timer [CH1] --- PA8
#define RFDA_TIM_ARR 10U
#define RFDA_TIM_CCR1 7U

#define LE_AND_DATA_PORT GPIOA
#define LE_S GPIO_BSRR_BS1 //[LE] --- PA1
#define LE_R GPIO_BSRR_BR1
#define DATA_S GPIO_BSRR_BS2 //[DATA] --- PA2
#define DATA_R GPIO_BSRR_BR2
#define DMA_CH DMA1_Channel5
#define BUF_LEN 7U
uint32_t buf[BUF_LEN];
uint8_t i;

void PWM_init(void){

	SET_BIT(RFDA_TIM->BDTR,TIM_BDTR_MOE);//OUTPUT ENABLE

	SET_BIT(RFDA_TIM->CCER, TIM_CCER_CC1E); //Capture/Compare 1 output enable
}
void PWM(uint8_t ar,uint8_t cc){
	//TIM CFG
    CLEAR_BIT(RFDA_TIM->CR1, TIM_CR1_CEN); //turn off counter
    CLEAR_BIT(RFDA_TIM->CCER, TIM_CCER_CC1E); //disable data OUTPUT
	WRITE_REG(RFDA_TIM->ARR,ar); //SET autoreload value
	WRITE_REG(RFDA_TIM->CCR1,cc);//SET capture-compare value
	WRITE_REG(RFDA_TIM->CNT,0U); //Set TIM counter to zero
	SET_BIT(RFDA_TIM->CCER, TIM_CCER_CC1E); //enable data OUTPUT
    SET_BIT(RFDA_TIM->EGR, TIM_EGR_UG); //update gen
	SET_BIT(RFDA_TIM->CR1,TIM_CR1_CEN); //enable counter

}

/**
  * @brief This function handles DMA1 channel2 global interrupt.
  */
void DMA1_Channel5_IRQHandler(void)
{
  /* USER CODE BEGIN DMA1_Channel2_IRQn 0 */
//	CLEAR_BIT(RFDA_TIM->CR1, TIM_CR1_CEN); //turn off counter
//	CLEAR_BIT(RFDA_TIM->CCER, TIM_CCER_CC1E); //disable data channel
//	WRITE_REG(LE_AND_DATA_PORT->BSRR,LE_S|DATA_R); //LE SET and DATA RESET at the END of transfer
//	SET_BIT(DMA1->IFCR, DMA_IFCR_CTCIF5); //CTCIFx: Channel x transfer complete flag clear (x = 1 ..7)
  /* USER CODE END DMA1_Channel2_IRQn 0 */

  /* USER CODE BEGIN DMA1_Channel2_IRQn 1 */


  /* USER CODE END DMA1_Channel2_IRQn 1 */
}