S32K148-LPTMR(裸机开发)

根据芯片手册进行配置：

//==========================================================================
//初始化LPTMR0
//==========================================================================

void lptmr0_init(void)
{
    uint32_t *PCC_LPTMR0_ptr;
    uint32_t *CSR_ptr;
    uint32_t *PSR_ptr;
    uint32_t *CMR_ptr;

    PCC_LPTMR0_ptr = (uint32_t *)(PCC_BASE + 0x100);
    *PCC_LPTMR0_ptr |= (1<<31) | (1<<30) |(1<<24);//使能LPTMR0时钟

    CSR_ptr = (uint32_t *)LPTMR0_BASE;
    PSR_ptr = (uint32_t *)(LPTMR0_BASE + 0x4);
    CMR_ptr = (uint32_t *)(LPTMR0_BASE + 0x8);

/*
    *PSR_ptr = 0x00000005;//lptmr_clk:1khz LPO,presacler bypass

    *CMR_ptr = 1000;     //1s
    *CSR_ptr = 0x00000041;//中断使能，定时器模式，开启定时器
*/

    *PSR_ptr = 0x00000010;//lptmr_clk:8Mhz SIRC,prescaler enbale,precaler value = 8(0010b),分频之后8M/8=1M
    *CMR_ptr = 1000;     //1ms
    *CSR_ptr = 0x00000041;//中断使能，定时器模式，开启定时器

    S32_NVIC_EnableIRQ(LPTMR0_IRQn);//使能中断ID
}

void LPTMR0_IRQHandler(void)
{
 LPTMR0->CSR |=    (1<<7);//清除中断标志
 count_1s++;
 if(count_1s == 1000)
 {
     count_1s = 0;
     gpio_reverse(PTe, 21);
 }

 count_1ms++;
 /*给2ms任务周期调用*/
 count_2ms++;

 /*给5ms任务周期调用*/
 count_5ms++;

 /*给10ms任务周期调用*/
 count_10ms++;

 /*给100ms任务周期调用*/
 count_100ms++;

 /*给250ms任务周期调用*/
 count_250ms++;

 /*给500ms任务周期调用*/
 count_500ms++;

 /*给1000ms任务周期调用*/
 count_1000ms++;
}