42 lines
797 B
C
42 lines
797 B
C
#include "stm32f10x.h"
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/**
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* @brief 微秒级延时
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* @param xus 延时时长，范围：0~233015
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* @retval 无
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*/
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void Delay_us(uint32_t xus)
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{
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SysTick->LOAD = 72 * xus; //设置定时器重装值
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SysTick->VAL = 0x00; //清空当前计数值
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SysTick->CTRL = 0x00000005; //设置时钟源为HCLK，启动定时器
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while(!(SysTick->CTRL & 0x00010000)); //等待计数到0
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SysTick->CTRL = 0x00000004; //关闭定时器
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}
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/**
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* @brief 毫秒级延时
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* @param xms 延时时长，范围：0~4294967295
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* @retval 无
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*/
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void Delay_ms(uint32_t xms)
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{
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while(xms--)
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{
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Delay_us(1000);
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}
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}
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/**
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* @brief 秒级延时
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* @param xs 延时时长，范围：0~4294967295
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* @retval 无
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*/
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void Delay_s(uint32_t xs)
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{
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while(xs--)
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{
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Delay_ms(1000);
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}
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}
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