84 lines
3.2 KiB
C
84 lines
3.2 KiB
C
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/******************** (C) COPYRIGHT 2020 GEEKIMU *******************************
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* File Name : delay.c
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* Current Version : V2.0 & ST 3.5.0
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* Author : zhanli 719901725@qq.com & JustFeng.
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* Date of Issued : 2015.5.15 zhanli : Create
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* Comments : STM32ϵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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********************************************************************************/
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#include <stdint.h>
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#include "delay.h"
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#include "misc.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;
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/**----------------------------------------------------------------------
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* Function : Delay_Init
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* Description : <EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֧<EFBFBD><EFBFBD>ucos<EFBFBD><EFBFBD>
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* Author : zhanli&719901725@qq.com
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* Date : 2015/2/13 zhanli
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*---------------------------------------------------------------------**/
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void Delay_Init(void)
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{
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// ѡ<><D1A1><EFBFBD>ⲿʱ<E2B2BF><CAB1> HCLK/8
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SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8);
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// Ϊϵͳʱ<CDB3>ӵ<EFBFBD>1/8
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fac_us = SystemCoreClock / 8000000;
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// <20><>ucos<6F><73>,<2C><><EFBFBD><EFBFBD>ÿ<EFBFBD><C3BF>ms<6D><73>Ҫ<EFBFBD><D2AA>systickʱ<6B><CAB1><EFBFBD><EFBFBD>
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fac_ms = (uint16_t)fac_us * 1000;
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}
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/**----------------------------------------------------------------------
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* Function : Delay_DeInit
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* Author : zhanli&719901725@qq.com
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* Description : <EFBFBD><EFBFBD><EFBFBD>³<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֧<EFBFBD><EFBFBD>ucos<EFBFBD><EFBFBD>
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* Date : 2015/2/13 zhanli
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*---------------------------------------------------------------------**/
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void Delay_DeInit(void){
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SysTick->CTRL = 0;
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}
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/**----------------------------------------------------------------------
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* Function : Delay_Ms(uint32_t ms)
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* Description : <EFBFBD><EFBFBD>ʱn<EFBFBD><EFBFBD><EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ȡֵ<EFBFBD><EFBFBD><EFBFBD>ܴ<EFBFBD><EFBFBD><EFBFBD>1864.SysTick->LOADΪ
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24λ<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>,<EFBFBD><EFBFBD><EFBFBD><EFBFBD>,<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱΪ:
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nms <= 0xffffff * 8 * 1000 / SYSCLK; SYSCLK<EFBFBD><EFBFBD>λΪHz,nms<EFBFBD><EFBFBD>
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λΪms.<EFBFBD><EFBFBD>Ӧ72M<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ,nms<=1864nms<EFBFBD><EFBFBD>
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* Author : zhanli&719901725@qq.com
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* Date : 2015/2/13 zhanli
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*---------------------------------------------------------------------**/
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void Delay_Ms(uint32_t ms)
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{
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uint32_t temp;
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SysTick->LOAD =(u32)ms*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|=SysTick_CTRL_ENABLE_Msk ; //<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&=~SysTick_CTRL_ENABLE_Msk; //<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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* Function : Delay_Us(uint32_t nus)
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* Description : <EFBFBD><EFBFBD>ʱn<EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ȡֵ<EFBFBD><EFBFBD><EFBFBD>ܴ<EFBFBD><EFBFBD><EFBFBD>1864us
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* Author : zhanli&719901725@qq.com
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* Date : 2015/2/13 zhanli
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*---------------------------------------------------------------------**/
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void Delay_Us(uint32_t nus)
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{
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uint32_t 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|=SysTick_CTRL_ENABLE_Msk ; //<2F><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>
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do{
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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><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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