NIM_DSP6748/code/hlx/tr_timer.c

/*
 * tr_timer.c
 *
 *  Created on: 2025年7月25日
 *      Author: 龙三郎
 *      定时不大准，需要精准定时，试用芯片提供的定时器
 */
#include "tr_timer.h"

// 定时器
static unsigned int BaseTime = 0;

void BaseTimeIncremental(void)
{
    BaseTime++;
}

unsigned int GetPassedTime(struct TimerStruct * timer)
{
    if(timer->flag == 0)
    {
        timer->flag = 1;
        timer->time = BaseTime;
        return 0;
    }
    else if(timer->flag != 1)
    {
        return 0;
    }
    else if(BaseTime >= timer->time)
    {
        return BaseTime - timer->time;
    }
    else
    {
        return 0xFFFFFFFF - timer->time + BaseTime;
    }
}

void ClearTimer(struct TimerStruct * timer)
{
    timer->flag = 0;
    timer->time = 0;
}

// 延时函数
void DelayMs(unsigned int ms)
{
    struct TimerStruct timer = {
        .time = 0,
        .flag = 0,
    };
    while(GetPassedTime(&timer) < ms){}
}