37 lines
1.4 KiB
C
37 lines
1.4 KiB
C
/* Includes ----------------------------------------------------------------- */
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#include "bsp/buzzer.h"
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#include <main.h>
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#include <tim.h>
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/* Private define ----------------------------------------------------------- */
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/* Private macro ------------------------------------------------------------ */
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/* Private typedef ---------------------------------------------------------- */
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/* Private variables -------------------------------------------------------- */
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/* Private function -------------------------------------------------------- */
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/* Exported functions ------------------------------------------------------- */
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int8_t BSP_Buzzer_Start(void) {
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if (HAL_TIM_PWM_Start(&htim12, TIM_CHANNEL_2) == HAL_OK) return BSP_OK;
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return BSP_ERR;
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}
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int8_t BSP_Buzzer_Set(float freq, float duty_cycle) {
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if (freq <= 0.0f || duty_cycle < 0.0f || duty_cycle > 1.0f) return BSP_ERR;
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uint32_t timer_clk = HAL_RCC_GetPCLK1Freq(); // 具体时钟频率请根据你的芯片和配置调整
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uint32_t prescaler = htim12.Init.Prescaler + 1;
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uint32_t period = (uint32_t)((float)timer_clk / (prescaler * freq)) - 1;
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__HAL_TIM_SET_AUTORELOAD(&htim12, period);
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uint32_t pulse = (uint32_t)(duty_cycle * (float)(period + 1));
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__HAL_TIM_SET_COMPARE(&htim12, TIM_CHANNEL_2, pulse);
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return BSP_OK;
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}
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int8_t BSP_Buzzer_Stop(void) {
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if (HAL_TIM_PWM_Stop(&htim12, TIM_CHANNEL_2) == HAL_OK) return BSP_OK;
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return BSP_ERR;
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}
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