89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
#include "bsp_pwm.h"
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#include "buzzer.h"
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#include "bsp_dwt.h"
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static PWMInstance *buzzer;
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static alarm_level_e now_alarm_level = ALARM_OFFLINE;
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void BuzzerOn(PWMInstance *buzzer );
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/**
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*
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* @brief 蜂鸣器报警函数
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* @param alarm_level 报警级别
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*/
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void BuzzerPlay(alarm_level_e alarm_level)
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{
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static alarm_level_e last_alarm_level = ALARM_LEVEL_LOW;
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if(((int)DWT_GetTimeline_s() % 5)<1) //每5秒检查一次
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{
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last_alarm_level = ALARM_LEVEL_LOW;
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now_alarm_level = ALARM_OFFLINE;
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}
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if(last_alarm_level <= now_alarm_level) //如果当前报警级别大于等于上一次报警级别,则更新报警级别
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{
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now_alarm_level = alarm_level;
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}
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last_alarm_level = alarm_level;
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}
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/**
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* @brief 蜂鸣器初始化
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*
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*/
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void buzzer_init()
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{
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PWM_Init_Config_s buzzer_config = {
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.htim = &htim4,
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.channel= TIM_CHANNEL_3,
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.period = 1,
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.pulse = 10000,
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.callback = BuzzerOn,
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};
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buzzer = PWMRegister(&buzzer_config);
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}
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/**
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* @brief 开启蜂鸣器
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*
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* @param buzzer
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*/
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//*@todo: 优化报警声，应类似D__,DDD,B__,BBB等报警声
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void BuzzerOn(PWMInstance *buzzer )
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{
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switch (now_alarm_level)
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{
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case ALARM_LEVEL_LOW:
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PWMSetPeriod(buzzer, 1);
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PWMSetPulse(buzzer, 10000);
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break;
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case ALARM_LEVEL_BELOW_MEDIUM:
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PWMSetPeriod(buzzer, 2);
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PWMSetPulse(buzzer, 10000);
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break;
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case ALARM_LEVEL_MEDIUM:
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PWMSetPeriod(buzzer, 3);
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PWMSetPulse(buzzer, 10000);
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break;
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case ALARM_LEVEL_ABOVE_MEDIUM:
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PWMSetPeriod(buzzer, 4);
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PWMSetPulse(buzzer, 10000);
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break;
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case ALARM_LEVEL_HIGH:
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PWMSetPeriod(buzzer, 5);
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PWMSetPulse(buzzer, 10000);
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break;
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default:
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PWMSetPulse(buzzer, 0);
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break;
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}
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}
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