- #include <iom16v.h>
- #include <macros.h>
- #define uchar unsigned char
- #define uint unsigned int
- uchar num;
- #pragma interrupt_handler miao:9
- #pragma data:code
- const table[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,
- 0x5E,0x79,0x71};
- void delay(uint ms)
- {
- uint i,j;
- for (i=0;i<ms;i++)
- for (j=0;j<1141;j++);
- }
- void show(uchar j,uchar k)
- {
- PORTA=table[k];
- delay(10);
- PORTC=table[j];
- delay(10);
- }
- void miao (void)
- {
- uchar a,b;
- TCNT1H=0X85;
- TCNT1L=0XED;
- a=num%10;
- b=num/10;
- show(a,b);
- }
- void main(void)
- {
- uint pre=0,cur=0;
- uchar j=0,k=0;
- DDRD=0x00;
- DDRA=0xff;
- DDRC=0xff;
- TCCR1B=0X04;
- TCNT1H=0X85;
- TCNT1L=0XED;
- TIMSK|=BIT(2);
- SREG|=BIT(7);
- show(j,k);
- delay(10);
- while(1)
- {
- cur = PIND&0x01;
- if(pre&(cur^pre)) num++;
- delay(1);
- pre=cur;
- }
- }
这样一个程序，用JTAG口仿真时，为什么数码管连接PA口的那个可以正常显示，连接PC口的那个却显示不正常。（实现的功能是计脉冲，PA口显示10位，PC口显示个位。）
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