forked from logzhan/RobotHardware-UESTC
97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
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/*
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********************************************************************************************************
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<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>delay.c
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<EFBFBD><EFBFBD> <EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>us ms
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<EFBFBD><EFBFBD> ע<EFBFBD><EFBFBD>
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<EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD>https://shop60670850.taobao.com
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<EFBFBD><EFBFBD> <EFBFBD>ߣ<EFBFBD>lilianhe
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<EFBFBD><EFBFBD> <EFBFBD><EFBFBD>: 2017-2-6
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*********************************************************************************************************
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*/
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/*
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********************************************************************************************************
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD>
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1.2017-2-6<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD>е<EFBFBD><EFBFBD>ó<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>ֹ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ȷ,<EFBFBD><EFBFBD><EFBFBD><EFBFBD>do while<EFBFBD>ṹ!
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*********************************************************************************************************
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*/
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#include "delay.h"
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static u8 fac_us=0;//us<75><73>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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static u16 fac_ms=0;//ms<6D><73>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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/*
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********************************************************************************************************
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD>Delay_Init(u8 SYSCLK)
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>ӳٺ<EFBFBD><EFBFBD><EFBFBD>
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Ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӣ<EFBFBD>SYSTICK<EFBFBD><EFBFBD>ʱ<EFBFBD>ӹ̶<EFBFBD>ΪHCLKʱ<EFBFBD>ӵ<EFBFBD>1/8<EFBFBD><EFBFBD>SYSCLK:ϵͳʱ<EFBFBD><EFBFBD>
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<EFBFBD><EFBFBD> ע<EFBFBD><EFBFBD>
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<EFBFBD><EFBFBD> <EFBFBD><EFBFBD>: 2017-2-6
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*********************************************************************************************************
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*/
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void Delay_Init(u8 SYSCLK)
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{
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// SysTick->CTRL&=0xfffffffb;//bit2<74><32><EFBFBD><EFBFBD>,ѡ<><D1A1><EFBFBD>ⲿʱ<E2B2BF><CAB1> HCLK/8
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SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8); //ѡ<><D1A1><EFBFBD>ⲿʱ<E2B2BF><CAB1> HCLK/8
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fac_us=SYSCLK/8;
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fac_ms=(u16)fac_us*1000;
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}
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/*
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********************************************************************************************************
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD>Delay_ms(u16 nms)
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD>ʱnms
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Ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӣ<EFBFBD>//SysTick->LOADΪ24λ<34>Ĵ<EFBFBD><C4B4><EFBFBD>,<2C><><EFBFBD><EFBFBD>,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱΪ:
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//nms<=0xffffff*8*1000/SYSCLK
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//SYSCLK<4C><4B>λΪHz,nms<6D><73>λΪms
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//<2F><>72M<32><4D><EFBFBD><EFBFBD><EFBFBD><EFBFBD>,nms<=1864
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<EFBFBD><EFBFBD> ע<EFBFBD><EFBFBD>
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<EFBFBD><EFBFBD> <EFBFBD><EFBFBD>: 2017-2-6
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*********************************************************************************************************
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*/
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void Delay_ms(u16 nms)
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{
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u32 temp;
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SysTick->LOAD=(u32)nms*fac_ms;//ʱ<><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(SysTick->LOADΪ24bit)
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SysTick->VAL =0x00; //<2F><><EFBFBD>ռ<EFBFBD><D5BC><EFBFBD><EFBFBD><EFBFBD>
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SysTick->CTRL=0x01 ; //<2F><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>
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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=0x00; //<2F>رռ<D8B1><D5BC><EFBFBD><EFBFBD><EFBFBD>
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SysTick->VAL =0X00; //<2F><><EFBFBD>ռ<EFBFBD><D5BC><EFBFBD><EFBFBD><EFBFBD>
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}
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/*
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********************************************************************************************************
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD>void Delay_us(u32 nus)
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD>ʱnus
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Ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӣ<EFBFBD>
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<EFBFBD><EFBFBD> ע:
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<EFBFBD><EFBFBD> <EFBFBD><EFBFBD>: 2017-2-6
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*********************************************************************************************************
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*/
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void Delay_us(u32 nus)
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{
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u32 temp;
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SysTick->LOAD=nus*fac_us; //ʱ<><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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SysTick->VAL=0x00; //<2F><><EFBFBD>ռ<EFBFBD><D5BC><EFBFBD><EFBFBD><EFBFBD>
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SysTick->CTRL=0x01 ; //<2F><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>
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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=0x00; //<2F>رռ<D8B1><D5BC><EFBFBD><EFBFBD><EFBFBD>
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SysTick->VAL =0X00; //<2F><><EFBFBD>ռ<EFBFBD><D5BC><EFBFBD><EFBFBD><EFBFBD>
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}
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//------------------End of File----------------------------
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