/* Includes ----------------------------------------------------------------- */
#include "bsp\buzzer.h"

#include <main.h>
#include <tim.h>

/* Private define ----------------------------------------------------------- */
/* Private macro ------------------------------------------------------------ */
/* Private typedef ---------------------------------------------------------- */
/* Private variables -------------------------------------------------------- */
/* Private function  -------------------------------------------------------- */
/* Exported functions ------------------------------------------------------- */
int8_t BSP_Buzzer_Start(void) {
  if (HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_4) == HAL_OK) return BSP_OK;
  return BSP_ERR;
}

/**
 * @brief 设置蜂鸣器频率和占空比
 * @param freq 
 * @param duty_cycle 
 * @return 
 */
int8_t BSP_Buzzer_Set(float freq, float duty_cycle) {
  uint16_t pulse = (uint16_t)(duty_cycle * (float)UINT16_MAX);
  __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_4, pulse);

  pulse = (uint16_t)freq;
  __HAL_TIM_PRESCALER(&htim3, pulse);
  return BSP_OK;
}

int8_t BSP_Buzzer_Stop(void) { 
  if (HAL_TIM_PWM_Stop(&htim3, TIM_CHANNEL_4) == HAL_OK) return BSP_OK;
  return BSP_ERR;
}