97 lines
3.2 KiB
C
97 lines
3.2 KiB
C
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/*
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*********************************************************************************************************
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*
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* ģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> : <EFBFBD><EFBFBD><EFBFBD>ݹ۲<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(DWT)ģ<EFBFBD><EFBFBD>
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* <EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> : bsp_dwt.c
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*********************************************************************************************************
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*/
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#include "bsp.h"
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/*
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*********************************************************************************************************
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* <EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>
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*********************************************************************************************************
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*/
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#define DWT_CYCCNT *(volatile unsigned int *)0xE0001004
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#define DWT_CR *(volatile unsigned int *)0xE0001000
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#define DEM_CR *(volatile unsigned int *)0xE000EDFC
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#define DBGMCU_CR *(volatile unsigned int *)0xE0042004
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#define DEM_CR_TRCENA (1 << 24)
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#define DWT_CR_CYCCNTENA (1 << 0)
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/*
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*********************************************************************************************************
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* <EFBFBD><EFBFBD> <EFBFBD><EFBFBD> <EFBFBD><EFBFBD>: bsp_InitDWT
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* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>: <EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>DWT. <EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> bsp_Init() <EFBFBD><EFBFBD><EFBFBD>á<EFBFBD>
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* <EFBFBD><EFBFBD> <EFBFBD><EFBFBD>: <EFBFBD><EFBFBD>
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* <EFBFBD><EFBFBD> <EFBFBD><EFBFBD> ֵ: <EFBFBD><EFBFBD>
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*********************************************************************************************************
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*/
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void bsp_InitDWT(void)
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{
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DEM_CR |= (unsigned int)DEM_CR_TRCENA; /* Enable Cortex-M4's DWT CYCCNT reg. */
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DWT_CYCCNT = (unsigned int)0u;
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DWT_CR |= (unsigned int)DWT_CR_CYCCNTENA;
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}
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/*
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*********************************************************************************************************
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* <EFBFBD><EFBFBD> <EFBFBD><EFBFBD> <EFBFBD><EFBFBD>: bsp_DelayUS
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* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>: <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>CPU<EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD>֣<EFBFBD>32λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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* OSSchedLock(&err);
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* bsp_DelayUS(5);
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* OSSchedUnlock(&err); <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>ӵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>
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* <EFBFBD><EFBFBD> <EFBFBD><EFBFBD>: _ulDelayTime <EFBFBD>ӳٳ<EFBFBD><EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD>λ1 us
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* <EFBFBD><EFBFBD> <EFBFBD><EFBFBD> ֵ: <EFBFBD><EFBFBD>
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*********************************************************************************************************
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*/
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void bsp_DelayUS(uint32_t _ulDelayTime)
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{
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uint32_t tCnt, tDelayCnt;
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uint32_t tStart;
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tStart = DWT_CYCCNT; /* <20>ս<EFBFBD><D5BD><EFBFBD>ʱ<EFBFBD>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD>ֵ */
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tCnt = 0;
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tDelayCnt = _ulDelayTime * (SystemCoreClock / 1000000); /* <20><>Ҫ<EFBFBD>Ľ<EFBFBD><C4BD><EFBFBD><EFBFBD><EFBFBD> */
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while(tCnt < tDelayCnt)
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{
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tCnt = DWT_CYCCNT - tStart; /* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><D0A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>32λ<32><CEBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>¼<EFBFBD><C2BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><C8BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD><C8B7><EFBFBD><EFBFBD> */
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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>: bsp_DelayMS
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* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>: Ϊ<EFBFBD><EFBFBD><EFBFBD>õײ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>RTOS<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>и<EFBFBD><EFBFBD>õļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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* ר<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ<EFBFBD><EFBFBD><EFBFBD>ӳٺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵײ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ms<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ڳ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӱ<EFBFBD><EFBFBD>ʵʱ<EFBFBD>ԡ<EFBFBD>
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* <EFBFBD><EFBFBD> <EFBFBD><EFBFBD>: n <EFBFBD>ӳٳ<EFBFBD><EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD>λ1 ms
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* <EFBFBD><EFBFBD> <EFBFBD><EFBFBD> ֵ: <EFBFBD><EFBFBD>
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*********************************************************************************************************
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*/
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void bsp_DelayMS(uint32_t _ulDelayTime)
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{
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bsp_DelayUS(1000*_ulDelayTime);
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}
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void bsp_DelayDWT(uint32_t _ulDelayTime)
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{
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uint32_t tCnt, tDelayCnt;
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uint32_t tStart;
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tCnt = 0;
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tDelayCnt = _ulDelayTime; /* <20><>Ҫ<EFBFBD>Ľ<EFBFBD><C4BD><EFBFBD><EFBFBD><EFBFBD> */
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tStart = DWT_CYCCNT; /* <20>ս<EFBFBD><D5BD><EFBFBD>ʱ<EFBFBD>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD>ֵ */
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while(tCnt < tDelayCnt)
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{
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tCnt = DWT_CYCCNT - tStart; /* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><D0A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>32λ<32><CEBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>¼<EFBFBD><C2BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><C8BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD><C8B7><EFBFBD><EFBFBD> */
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}
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}
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/***************************** END OF FILE *********************************/
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