【MPC5744P】S32DS配置etimer, pit中断

DEVKIT-mpc5744p配置etimer中断

软件：S32 Design Studio for Power Architecture Version 2.1
新建工程,配置与生成代码
本文工程下载

1. Components双击添加eTimer模块, 改名
   
2. 改成上下沿计数模式
   
3. 主要时钟输入改为分频输入
   
4. 双击ClockMan1, 可以看到eTimer1的时钟源也是MOTC, 下边可以改MOTC的时钟源, 最后一个选项卡可以看eTimer具体时钟频率
   
5. 保存,生成代码
6. 在main.c里添加业务代码

   // 中断函数
   void ETIMER0_Ch0_IRQHandler(void)
   {
   #define CNT_TIMEOUT     2
       static uint32_t cnt=CNT_TIMEOUT;
       if(--cnt==0)
       {
           /* RED LED toggle */
           PINS_DRV_TogglePins(PTC,(1 << 12));
           cnt=CNT_TIMEOUT;
       }
       /* need to reset flags */
       ETIMER_DRV_ClearInterruptStatus(0,ETIMER_CH_IRQ_FLAGS_TOF,0);
   }
   // 定时器中断的初始化
   /* setup ETIMERx channels */
   ETIMER_DRV_Init(INST_ETIMER0);
   ETIMER_DRV_InitChannel(INST_ETIMER0, 0, &eTimer0_etimer_user_channel_config0);
   /* Enable ETIMER0 channel 0 interrupt and install an ISR */
   IRQn_Type etimer0_ch0_irq_id = ETIMER_DRV_GetInterruptNumber(0,ETIMER_IRQ_CH0);
   INT_SYS_InstallHandler(etimer0_ch0_irq_id, &ETIMER0_Ch0_IRQHandler, (isr_t*) 0);
   INT_SYS_EnableIRQ(etimer0_ch0_irq_id);
   /* enable interrupts */
   ETIMER_DRV_EnableInterruptSource(INST_ETIMER0,ETIMER_CH_IRQ_SOURCE_TOFIE,0);
   /* start channel operation */
   ETIMER_DRV_StartTimerChannels(INST_ETIMER0, (ETIMER_ENABLE_CH0));
   

7. 编译,Debug

pit中断

PIT_DRV_Init(INST_PIT1, &pit1_InitConfig);
PIT_DRV_InitChannel(INST_PIT1, &pit1_ChnConfig0);
PIT_DRV_StartChannel(INST_PIT1, pit1_ChnConfig0.hwChannel);

void PIT_Ch0_IRQHandler(void)
{
    PINS_DRV_TogglePins(PTC, (1<<13));
	PIT_DRV_ClearStatusFlags(INST_PIT1, pit1_ChnConfig0.hwChannel);     /* Clear channel 0 interrupt flag */
}