108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
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#include "systick_delay.h"
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#include "hk32f030m.h"
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static uint8_t fac_us = 0;
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static uint16_t fac_ms = 0;
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/*******************************************************************************
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* @2017-12-16
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* Function Name : delay_init
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* Description : <EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>
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* Input : none
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* Output : none
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* Return : none
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* SYSTICK<EFBFBD><EFBFBD>ʱ<EFBFBD>ӹ̶<EFBFBD>ΪHCLKʱ<EFBFBD>ӵ<EFBFBD>1/8
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* SYSCLK:ϵͳʱ<EFBFBD><EFBFBD>
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*******************************************************************************/
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void delay_init(void)
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{
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SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8);
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fac_us = SystemCoreClock/8000000;
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fac_ms = (uint16_t)fac_us*1000;
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}
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/*******************************************************************************
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* @2017-12-16
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* Function Name : delay_us
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* Description : us<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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* Input : nus--<EFBFBD><EFBFBD>ʱʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ
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* Output : none
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* Return : none
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*******************************************************************************/
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void delay_us(uint32_t nus)
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{
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if( nus > 0 )
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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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{
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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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/*******************************************************************************
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* @2017-12-16
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* Function Name : delay_ms
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* Description : <EFBFBD><EFBFBD>ʱnms<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>
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ע<EFBFBD><EFBFBD>nms<EFBFBD>ķ<EFBFBD>Χ
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SysTick->LOADΪ24λ<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
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SYSCLK<EFBFBD><EFBFBD>λΪHz,nms<EFBFBD><EFBFBD>λΪms
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<EFBFBD><EFBFBD>32M<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>,nms<=4194
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* Input :
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* Output :
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* Return :
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*******************************************************************************/
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void delay_ms(uint16_t nms)
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{
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uint32_t temp;
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if( nms > 0 )
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{
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SysTick->LOAD=(uint32_t)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|=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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