ARM-TIMER使用

最新推荐文章于 2025-06-29 01:08:47 发布

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最新推荐文章于 2025-06-29 01:08:47 发布

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分类专栏： ARM 文章标签： ARM TIMER

本文链接：https://blog.youkuaiyun.com/J_1234567890/article/details/51045859

使用TIMER的寄存器配置

void Timer_Init(Timer_Base_TypeDef timer_base)
{
    U8 timerx = timer_base.timerx;
    //Timer input clock Frequency = PCLK / {prescaler value+1} / {divider value}
    //{prescaler value} = 0~255
    //{divider value} = 2, 4, 8, 16

    /*根据选择的timer0~4进行不同bit位的预分频设置*/
    if (timer_base.timerx == TIMER0 || timer_base.timerx == TIMER1)
    {
  
  //TCFG0-bit[7,0]for Timer 0 and 1.
        TCFG0 &= ~0xff;
        TCFG0 |= timer_base.prescaler;
    }
    else if (timer_base.timerx == TIMER2 \
             || timer_base.timerx == TIMER3 \
             || timer_base.timerx == TIMER4 )
    {
  
  //TCFG0-bit[15,8]for Timer 2 and 3 and 4.
        TCFG0 &= ~0xff00;
        TCFG0 |= (timer_base.prescaler << 8);
    }

    /*配置分频系数*/
    //timer_base.timerx在这里用于控制多少位
    TCFG1 &= ~(0xf << (timer_base.timerx * 4));
    TCFG1 |= (timer_base.mux << (timer_base.timerx * 4));

    /*定时器的初值配置*/
    switch(timerx)
    {
        case TIMER0:
            TCNTB0 = timer_base.timer_count ;
            break;
        case TIMER1:
            TCNTB1 = timer_base.timer_count ;
            break;
        case TIMER2:
            TCNTB2 = timer_base.timer_count ;
            break;
        case TIMER3:
            TCNTB3 = timer_base.timer_count ;
            brea