60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
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#include "delay.h"
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#include "stdint.h"
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#include "stm32f10x.h"
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static uint8_t fac_us=0; //us<75><73>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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static uint16_t fac_ms=0; //ms<6D><73>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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void DelayInit(void)
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{
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//ѡ<><D1A1><EFBFBD>ⲿʱ<E2B2BF><CAB1>
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SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8);
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fac_us=SystemCoreClock/8000000; //<2F><><EFBFBD><EFBFBD>Ϊϵͳʱ<CDB3>ӵ<EFBFBD>1/8
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fac_ms=(u16)fac_us*1000;
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}
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void Delay_us(unsigned int us)
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{
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u32 temp;
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SysTick->LOAD=us*fac_us; //<2F><><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>
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SysTick->VAL=0x00; //<2F><><EFBFBD>ռ<EFBFBD>ʱ<EFBFBD><CAB1>
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SysTick->CTRL|=SysTick_CTRL_ENABLE_Msk;
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do
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{
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temp=SysTick->CTRL;
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}
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while(temp&0x01&&!(temp&(1<<16))); //<2F>ȴ<EFBFBD>ʱ<EFBFBD>䵽<EFBFBD><E4B5BD>
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SysTick->CTRL&=~SysTick_CTRL_ENABLE_Msk; //<2F>رռ<D8B1>ʱ<EFBFBD><CAB1>
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SysTick->VAL=0x00; //<2F><><EFBFBD>ռ<EFBFBD>ʱ<EFBFBD><CAB1>
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}
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void Delay_ms(unsigned int ms)
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{
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u32 temp;
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SysTick->LOAD=ms*fac_ms;
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SysTick->VAL=0x00;
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SysTick->CTRL|=SysTick_CTRL_ENABLE_Msk;
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do
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{
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temp=SysTick->CTRL;
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}
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while(temp&0x01&&!(temp&(1<<16)));
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SysTick->CTRL&=~SysTick_CTRL_ENABLE_Msk;
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SysTick->VAL=0x00;
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}
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void Delay_s(unsigned int s)
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{
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unsigned char i;
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for(i=0;i<s;i++)
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{
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Delay_ms(1000);
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}
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}
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