Question

您好，我正在尝试在PIC18F26K83上使用Timer1中断。我使用Micro C作为编译器。因此，我将计时器设置为30毫秒，然后在30毫秒后输入中断并点亮LED。但是它永远不会点亮LED（永远不会进入中断/永远不会发生中断。）。代码是：

 #define led LATA.RA2
void Clk_8Mhz(){
   //8 MHz clock
          //  OSCCON1 REGISTER
   NOSC2_BIT=1;
  NOSC1_BIT=1;
   NOSC0_BIT=0;//HF INTERNAL OSC
   //OSCFRQ REGISTER HFINTOSC FREQ. SELECTION


OSCCON1 =0b01100000; //HFINTOSC, Divider =1;
    FRQ3_BIT=0;
   FRQ2_BIT=0;
   FRQ1_BIT=1;
   FRQ0_BIT=1;    // 0011 :8MHz     //0100 = 16 Mhz
  }


  //Timer1
//Prescaler 1:1; TMR1 Preload = 5536; Actual Interrupt Time : 30 ms

void InitTimer1(){
  T1CON  = 0x01;
  TMR1IF_bit     = 0;
  TMR1H  = 0x15;
  TMR1L  = 0xA0;
  TMR1IE_bit     = 1;
  INTCON     = 0xC0;
}

void main (){
TRISA.B2=0;
led=0;
clk_8Mhz();
InitTimer1();
while(1){
 delay_ms(10);
}   }

void Interrupt(){
  if (TMR1IF_bit){
    TMR1IF_bit = 0;
    TMR1H    = 0x15;
    TMR1L    = 0xA0;
    led=1;
  }
}

此永不发生中断的原因可能是什么？预先感谢。

Answer 1

尝试将MVECEN配置位设置为OFF（CONFIG2L的一部分），因为您的void Interrupt()代码要求这样做，另请参见Official statement regarding the K42 and K83 family issues (Mikro C)

Support for Interrupt Vector table for K42/K83 families was not implemented, only the legacy interrupt approach was supported.

PIC timer1中断永远不会发生

1 个答案: