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GasFlowMeter/User/bsp/delay/core_delay.c

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流量计算机 完成流量计算代码的C转换
2025-07-06 07:50:36 +00:00
/**
******************************************************************
* @file core_delay.c
* @author fire
* @version V1.0
* @date 2018-xx-xx
* @brief ʹ<EFBFBD><EFBFBD><EFBFBD>ں˼Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD><EFBFBD>ʱ
******************************************************************
* @attention
*
* ʵ<EFBFBD><EFBFBD>ƽ̨:Ұ<EFBFBD><EFBFBD> STM32H750 <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
* <EFBFBD><EFBFBD>̳ :http://www.firebbs.cn
* <EFBFBD>Ա<EFBFBD> :https://fire-stm32.taobao.com
*
******************************************************************
*/
#include "./delay/core_delay.h"
/*
**********************************************************************
* ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ؼĴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
**********************************************************************
*/
/*
<EFBFBD><EFBFBD>Cortex-M<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>DWT(Data Watchpoint and Trace)<EFBFBD><EFBFBD>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>32λ<EFBFBD>ļĴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>CYCCNT<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
<EFBFBD><EFBFBD>¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>еĸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܼ<EFBFBD>¼<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>
8.94s=2<EFBFBD><EFBFBD>32<EFBFBD>η<EFBFBD>/480000000
(<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD>Ƶ<EFBFBD><EFBFBD>Ϊ480M<EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>ε<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ1/480M=2.08ns)
<EFBFBD><EFBFBD>CYCCNT<EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD>󣬻<EFBFBD><EFBFBD><EFBFBD>0<EFBFBD><EFBFBD><EFBFBD>¿<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>ϼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
ʹ<EFBFBD><EFBFBD>CYCCNT<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>裺
1<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD>DWT<EFBFBD><EFBFBD><EFBFBD>裬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˵<EFBFBD><EFBFBD>ԼĴ<EFBFBD><EFBFBD><EFBFBD>DEMCR<EFBFBD><EFBFBD>λ24<EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD>д1ʹ<EFBFBD><EFBFBD>
2<EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD>CYCCNT<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>֮ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>0
3<EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD>CYCCNT<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>DWT_CTRL(<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϻ궨<EFBFBD><EFBFBD>ΪDWT_CR)<EFBFBD><EFBFBD>λ0<EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD>д1ʹ<EFBFBD><EFBFBD>
*/
#define DWT_CR *(__IO uint32_t *)0xE0001000
#define DWT_CYCCNT *(__IO uint32_t *)0xE0001004
#define DEM_CR *(__IO uint32_t *)0xE000EDFC
#define DEM_CR_TRCENA (1 << 24)
#define DWT_CR_CYCCNTENA (1 << 0)
/**
* @brief <EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
* @param <EFBFBD><EFBFBD>
* @retval <EFBFBD><EFBFBD>
* @note ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
*/
HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
{
/* ʹ<><CAB9>DWT<57><54><EFBFBD><EFBFBD> */
DEM_CR |= (uint32_t)DEM_CR_TRCENA;
/* DWT CYCCNT<4E>Ĵ<EFBFBD><C4B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>0 */
DWT_CYCCNT = (uint32_t)0u;
/* ʹ<><CAB9>Cortex-M DWT CYCCNT<4E>Ĵ<EFBFBD><C4B4><EFBFBD> */
DWT_CR |= (uint32_t)DWT_CR_CYCCNTENA;
return HAL_OK;
}
/**
* @brief <EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>ǰʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
* @param <EFBFBD><EFBFBD>
* @retval <EFBFBD><EFBFBD>ǰʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>DWT_CYCCNT<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ
*/
uint32_t CPU_TS_TmrRd(void)
{
return ((uint32_t)DWT_CYCCNT);
}
/**
* @brief <EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>ǰʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
* @param <EFBFBD><EFBFBD>
* @retval <EFBFBD><EFBFBD>ǰʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>DWT_CYCCNT<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ
*/
uint32_t HAL_GetTick(void)
{
return ((uint32_t)DWT_CYCCNT/SysClockFreq*1000);
}
/**
* @brief <EFBFBD><EFBFBD><EFBFBD><EFBFBD>CPU<EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD>־<EFBFBD>ȷ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>32λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
* @param us : <EFBFBD>ӳٳ<EFBFBD><EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD>λ1 us
* @retval <EFBFBD><EFBFBD>
* @note ʹ<EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD><EFBFBD>CPU_TS_TmrInit<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ܼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
<EFBFBD><EFBFBD>ʹ<EFBFBD>ܺ<EFBFBD>CPU_TS_INIT_IN_DELAY_FUNCTION
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱֵΪ8<EFBFBD>룬<EFBFBD><EFBFBD>8*1000*1000
*/
void CPU_TS_Tmr_Delay_US(uint32_t us)
{
uint32_t ticks;
uint32_t told,tnow,tcnt=0;
/* <20>ں<EFBFBD><DABA><EFBFBD><EFBFBD>ڲ<EFBFBD><DAB2><EFBFBD>ʼ<EFBFBD><CABC>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><C4B4><EFBFBD><EFBFBD><EFBFBD> */
#if (CPU_TS_INIT_IN_DELAY_FUNCTION)
/* <20><>ʼ<EFBFBD><CABC>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
HAL_InitTick(5);
#endif
ticks = us * (GET_CPU_ClkFreq() / 1000000); /* <20><>Ҫ<EFBFBD>Ľ<EFBFBD><C4BD><EFBFBD><EFBFBD><EFBFBD> */
tcnt = 0;
told = (uint32_t)CPU_TS_TmrRd(); /* <20>ս<EFBFBD><D5BD><EFBFBD>ʱ<EFBFBD>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD>ֵ */
while(1)
{
tnow = (uint32_t)CPU_TS_TmrRd();
if(tnow != told)
{
/* 32λ<32><CEBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǵ<EFBFBD><C7B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
if(tnow > told)
{
tcnt += tnow - told;
}
/* <20><><EFBFBD><EFBFBD>װ<EFBFBD><D7B0> */
else
{
tcnt += UINT32_MAX - told + tnow;
}
told = tnow;
/*ʱ<>䳬<EFBFBD><E4B3AC>/<2F><><EFBFBD><EFBFBD>Ҫ<EFBFBD>ӳٵ<D3B3>ʱ<EFBFBD><CAB1>,<2C><><EFBFBD>˳<EFBFBD> */
if(tcnt >= ticks)break;
}
}
}
/*********************************************END OF FILE**********************/
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