一段简单的程序求教~！本人菜鸟……求解~万分感谢！

napoleon90 · 发表于 2010-8-16 20:14:10

#include <hidef.h>    /* common defines and macros */
#include "derivative.h"    /* derivative-specific definitions */
#include<mc9s12dg128.h>
#define EnableInterrupt  asm("cli") //开中断
#define disableInterrupt asm("sei") //关中断
int count,m;

const char Dtable[10] =
// 0 1 2 3 4    5 6 7 8 9
  {0xC0,0xF9,0xA4,0xB0,0x99, 0x92,0x82,0xF8,0x80,0x90};
//片选表

void timerint()
{
TSCR1=0x80;
TSCR2=0x05;    //分频p=32 则中断一次为1/23秒

}

void LEDInit(void)
{
DDRA = 0xFF; //数据口为输出
DDRP= 0x00; //位选口为输入
}

void mcuint()
{
DisableInterrupts;
CLKSEL_PLLSEL=0;
PLLCTL_PLLON=0;
SYNR=0X02;
REFDV=0X01;
PLLCTL_PLLON=1;
while((CRGFLG&0X08)==0X00);
CLKSEL_PLLSEL=1;             //fbus=48mhz
EnableInterrupts;
}

__interrupt  void isr(void)
{

  DisableInterrupts;
count++;
if(count==23)
{
LEDshow(m++);
delay(500);
count=0;
  if(m==9)
  {

m=0;
delay(20);
LEDshow(m);
delay(100);

  }

}
TFLG2=0x80;
EnableInterrupts;
}

void delay(int i)
{
int j;
for(j=0;j<500;j++)
while(i--);
}

void LEDshow(int b)
{

  PORTA=Dtable;

}


void main(void) {

DisableInterrupts;
   mcuinit();
   LEDInit();
   timerint() ;
   TSCR2 |= 0x80;
   count=0;
   m=0;
   EnableInterrupts;
   for(;;);

}

求大神指点……