52 lines
1.1 KiB
Plaintext
52 lines
1.1 KiB
Plaintext
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/***
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***************************************************************************
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* @file delay.c
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* @version V1.0.0
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* @brief delay接口相关函数
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***************************************************************************
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* @description
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*
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* SysTick定时器配置为1ms中断，实现毫秒延时
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*
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***************************************************************************
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***/
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#include "delay.h"
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static __IO u32 TimingDelay; //计数变量
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// 函数：延时初始化
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// 说明：配置 SysTick 为1ms中断，并启动定时器
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//
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void Delay_Init(void)
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{
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SysTick_Config(SystemCoreClock / 1000); //配置SysTick时钟为1ms中断
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}
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// 函数：计时函数
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// 说明：在 SysTick 中断服务函数里被调用
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//
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void OS_CPU_SysTickHandler(void)
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{
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if (TimingDelay != 0)
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{
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TimingDelay--;
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}
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}
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// 函数：毫秒延时
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// 参数：nTime - 延时时间，单位ms
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// 说明：每次调用都会重新给TimingDelay赋值，实现 n 毫秒的延时，最大延时 4294967295 ms。
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//
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void Delay_ms(u32 nTime)
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{
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TimingDelay = nTime;
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while(TimingDelay != 0);
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}
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