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72 lines
1.6 KiB
72 lines
1.6 KiB
/*
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* Timer.c
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*
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* Created on: Feb 28, 2025
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* Author: bihon
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*/
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#include "Timer.h"
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uint16_t Timer_Value; //用于存储计时时间
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static uint16_t Time;//静态变量，用于实际计时
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volatile uint8_t Timer_Stop_Permission;//计时中断允许标志
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volatile uint8_t Timer_Stop_Mark; //计时器停止标志
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/**
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* @brief 设置定时器的计时时间
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* @param set_time 要设置的计时时间（单位：ms）
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* @param stop_perm 计时中断允许标志，0 表示不允许中断，1 表示允许中断
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* @return 设置成功返回 1，参数错误设置失败返回 0
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* @note 由于定时器周期为 2ms，实际计时时间为 set_time / 2
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*/
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uint8_t Timer_Set(uint16_t set_time, uint8_t stop_perm)
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{
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if(set_time >= 2)
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{
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Timer_Value = set_time / 2;
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Time = Timer_Value;//为定时器赋计数值
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Timer_Stop_Permission = stop_perm;//为定时器允许中断标志赋值
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Timer_Stop_Mark = 0;//定时器停止标志恢复默认值
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return 1;//设置成功
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}else
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{
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return 0;//参数错误，设置失败
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}
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}
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/**
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* @brief 开始倒计时，在定时器中断中调用
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* @return 计时结束返回 1，计时未结束或被停止返回 0，计时过程被打断返回2
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*/
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uint8_t Timer_Start_Count()
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{
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//定时器周期为2ms，实际计时数据为设定时间除2
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if(!Timer_Stop_Mark)
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{
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if(Time >= 0)
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{
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if(Time == 0)
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{
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return 1;//计时结束
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}
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Time--;
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return 0;//仍在计时
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}
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}else
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{
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Time = 0;//计数器清零
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return 2;//停止计时
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}
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}
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/**
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* @brief 停止定时器计时
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*/
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void Timer_Stop_Count()
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{
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if(Timer_Stop_Permission == 1)
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{
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Timer_Stop_Mark = 1;
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}
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}
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