为什么单片机没有输出?

只看该作者 · 2014-10-23 18:21

本人最近新接触PIC单片机,遇到一些麻烦.
采用的是MCU芯片是PIC16F1503,
开发工具MPLAB X IDE,XC8编译器.PICkit3仿真器.
暂时先先控制两个LED灯,以确认单片机工作正常,
但是把如下代码烧录后,LED没反应,经测量,单片机没输出.
请教各位前辈,这个代码是否有问题?先谢谢各位了.

// CONFIG1
#pragma config FOSC = INTOSC
#pragma config WDTE = OFF
#pragma config PWRTE = ON
#pragma config MCLRE = ON
#pragma config CP = OFF
#pragma config BOREN = OFF
#pragma config CLKOUTEN = OFF
// CONFIG2
#pragma config WRT = OFF
#pragma config STVREN = ON
#pragma config BORV = 25
#pragma config LPBOR = OFF
#pragma config LVP = OFF

#define K1P    RC4
#define K1    LATC4

#define TX    LATC5
#define RX    RA4
#define LED1 LATC2
#define LED2 LATC3

typedef unsigned char U8;
typedef unsigned int U16;

U16 IsSendCmd,Timeout;

void System_Init()
{

OSCCON    = 0b01111010;
OPTION_REG  = 0b10000000;
IOCIE=0;
PEIE=0;
GIE=0;

ANSELA    = 0b00000000;
ANSELC    = 0b00000000;
TRISA    = 0b00110100;
TRISC    = 0b00000000;
PORTA    = 0b00000000;
PORTC    = 0b00000000;

/* Port Interrupt Config */
IOCAF2 = 0; //INT_Pin
IOCAP2=1; //Positive edge
IOCAN2=1; //Negative edge

IOCAF4 = 0; //RX_Pin
IOCAP4=1;
IOCAN4=1;

IOCAF5 = 0; //ZERO_Pin
IOCAP5=1;
IOCAN5=1;

/* TIME2 Config */
PR2=0x7D;       //125
T2CON=0x02;    //16M  1:16 Fosc/4,  -> 0.25MHz -> 4us
TMR2=0;
TMR2ON=1;
TMR2IE=1;

IOCIE=1;
PEIE=1;
GIE=1;
}

void interrupt ISR(void)
{
if(TMR2IE&&TMR2IF)    //Timer2 500us
{
      TMR2IF=0;
      Timeout ++;
      if(Timeout >= 2000)          // 1S
      {
         Timeout = 0;
         IsSendCmd = 1;
      }
}
}

void main()
{
System_Init();

while(1)
{
      if(IsSendCmd)
      {
         IsSendCmd = 0;

         if(LED1 == 1)
         {
            LED1 = 0;
            LED2 = 1;
         }
         else
         {
            LED1 = 1;
            LED2 = 0;
         }
      }
}
}