PIC16LF1508单片机无法进入定时器中断1

1万 · 2022-2-19 14:18

本帖最后由 pzsh 于 2022-2-22 16:43 编辑

程序框架是使用MCC进行配置。
定时器1初始化如下：
void TMR1_Initialize(void)
{
//Set the Timer to the options selected in the GUI

//T1GSS T1G_pin; TMR1GE disabled; T1GTM disabled; T1GPOL low; T1GGO_nDONE done; T1GSPM disabled;
T1GCON = 0x00;

TMR1H = 0xFF;

TMR1L = 0xE1;          //时间1ms

// Clearing IF flag before enabling the interrupt.
PIR1bits.TMR1IF = 0;

// Load the TMR value to reload variable
timer1ReloadVal=(uint16_t)((TMR1H << 8) | TMR1L);

// Enabling TMR1 interrupt.
PIE1bits.TMR1IE = 1;

// Set Default Interrupt Handler
TMR1_SetInterruptHandler(TMR1_DefaultInterruptHandler);

// T1CKPS 1:1; T1OSCEN disabled; nT1SYNC synchronize; TMR1CS LFINTOSC; TMR1ON enabled;
T1CON = 0xC1;
}
定时器1中断程序如下：
void TMR1_ISR(void)
{

// Clear the TMR1 interrupt flag
PIR1bits.TMR1IF = 0;

TMR1_WriteTimer(timer1ReloadVal);

Bug_Check();

Read_Key_Value();

// ticker function call;
// ticker is 1 -> Callback function gets called everytime this ISR executes
TMR1_CallBack();
}

中断处理程序如下：
void __interrupt() INTERRUPT_InterruptManager (void)
{
// interrupt handler
if(INTCONbits.TMR0IE == 1 && INTCONbits.TMR0IF == 1)
{
      TMR0_ISR();
}
else if(INTCONbits.PEIE == 1)
{
      if(PIE1bits.TMR1IE == 1 && PIR1bits.TMR1IF == 1)
      {
         TMR1_ISR();
      }
      else
      {
         //Unhandled Interrupt
      }
}
else
{
      //Unhandled Interrupt
}
}

主程序如下：
void main(void)
{
SYSTEM_Initialize();

// Enable the Global Interrupts
INTERRUPT_GlobalInterruptEnable();

// Enable the Peripheral Interrupts
INTERRUPT_PeripheralInterruptEnable();

// Disable the Global Interrupts
//INTERRUPT_GlobalInterruptDisable();

// Disable the Peripheral Interrupts
//INTERRUPT_PeripheralInterruptDisable();

//TMR1_StartTimer();

//TMR1_SetInterruptHandler(TMR1_ISR);

uint16_t t;

t = TMR1_ReadTimer();

while(1)
{
      WDT_Disable();

      Power_Low_Check();
      t = TMR1_ReadTimer();
      Key_Handle();

      Reset_Time_Judge();

      Reset_Task();

      Led_Blink();

      WDT_Enable();

      SLEEP();
}
}

按道理来说定时器初始化后TMR1ON都已经设为1了，全局中断和外设中断一开启应该就能开启计时，但是经过读取，两次的t都是FFE2，计数值感觉都没变，打断点调试了一下发现也没有进入中断，求大佬指点。