mirror of
https://gitee.com/lzc56/MiaoUI.git
synced 2025-08-13 20:52:52 +00:00
62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
|
#include "HAL_Buzzer.h"
|
|||
|
|
|
|||
|
|
#define BUZZER_TIM TIM3
|
|||
|
|
#define BUZZER_CLOCK RCC_APB2Periph_GPIOB
|
|||
|
|
#define BUZZER_PORT GPIOB
|
|||
|
|
#define BUZZER_PIN GPIO_Pin_0
|
|||
|
|
|
|||
|
|
void HAL_Buzzer_Init(void)
|
|||
|
|
{
|
|||
|
|
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
|
|||
|
|
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
|
|||
|
|
|
|||
|
|
GPIO_InitTypeDef GPIO_InitStructure;
|
|||
|
|
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
|
|||
|
|
GPIO_InitStructure.GPIO_Pin = BUZZER_PIN; ;
|
|||
|
|
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
|
|||
|
|
GPIO_Init(BUZZER_PORT, &GPIO_InitStructure);
|
|||
|
|
|
|||
|
|
TIM_InternalClockConfig(BUZZER_TIM);
|
|||
|
|
|
|||
|
|
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
|
|||
|
|
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
|
|||
|
|
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
|
|||
|
|
TIM_TimeBaseInitStructure.TIM_Period = 1000 - 1; //ARR
|
|||
|
|
TIM_TimeBaseInitStructure.TIM_Prescaler = 72 - 1; //PSC
|
|||
|
|
TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
|
|||
|
|
TIM_TimeBaseInit(BUZZER_TIM, &TIM_TimeBaseInitStructure);
|
|||
|
|
|
|||
|
|
TIM_OCInitTypeDef TIM_OCInitStructure;
|
|||
|
|
TIM_OCStructInit(&TIM_OCInitStructure);
|
|||
|
|
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
|
|||
|
|
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //取反PWM波形
|
|||
|
|
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
|
|||
|
|
TIM_OCInitStructure.TIM_Pulse = 999; //CCR 默认占空比为50，音量50
|
|||
|
|
TIM_OC3Init(BUZZER_TIM, &TIM_OCInitStructure);
|
|||
|
|
|
|||
|
|
TIM_Cmd(BUZZER_TIM, DISABLE);
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* @brief 设置 PWM 的频率,需要完成传入 0 关闭 PWM
|
|||
|
|
*
|
|||
|
|
* @param frequency 频率值，单位为赫兹（Hz）
|
|||
|
|
*/
|
|||
|
|
void pwm_set_freq(uint32_t frequency)
|
|||
|
|
{
|
|||
|
|
if (frequency == 0) {
|
|||
|
|
// 停止定时器
|
|||
|
|
TIM_Cmd(BUZZER_TIM, DISABLE);
|
|||
|
|
} else {
|
|||
|
|
// 计算预分频值和周期值
|
|||
|
|
uint32_t prescaler = SystemCoreClock / frequency - 1;
|
|||
|
|
// 停止定时器
|
|||
|
|
TIM_Cmd(BUZZER_TIM, DISABLE);;
|
|||
|
|
// 更新预分频值和周期值
|
|||
|
|
TIM_PrescalerConfig(BUZZER_TIM, prescaler, TIM_PSCReloadMode_Update);
|
|||
|
|
// 重新启动定时器
|
|||
|
|
TIM_Cmd(BUZZER_TIM, ENABLE);
|
|||
|
|
}
|
|||
|
|
}
|