EEPW论坛

#include <mega16.h>
flash unsigned char led_7[13]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0X07,0X7F,0X6F,0x77,0x7C,0x40};
flash unsigned char position[8]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};
unsigned char dis_buff[8];
unsigned char key_time_counter;
unsigned char posit;
unsigned char key_time_ok;
void display(void)
{
        PORTC=0xff;
PORTA=led_7[dis_buff[posit]];
PORTC=position[posit];
if(++posit>=8)posit=0;
}
#pragma interrupt_handler timer0_comp_isr:20
void timer0_comp_isr(void)
{
   display();
   if(++key_time_counter>=5)
   {
      key_time_counter=0;
 key_time_ok=1;
   }
}
# define No_key   255
# define K1_1   1
# define K1_2   2
# define K1_3   3
# define K2_1   4
# define K2_2   5
# define K2_3   6
# define K3_1   7
# define K3_2   8
# define K3_3   9
# define K4_1   10
# define K4_2   0
# define K4_3   11
# define Key_mask   0b00000111
unsigned char read_keyboard()
{
   static unsigned char key_state=0,key_value,key_line;
   unsigned char key_return=No_key,i;
   switch(key_state)
   {
   case0:
     key_line=0b00001000;
for(i=1;i<=4;i++)
{
  PORTD=~key_line;
  PORTD=~key_line;
key_value=Key_mask&PIND;
if(key_value==Key_mask)
key_line<<=1;
else
{
key_state++;
break;
}
} 
     break;
 case1:
     if(key_value==(Key_mask&PIND))
{
  switch(key_line|key_value)
  {
 case 0b00001110: key_return = K1_1;break;              
 case 0b00001101: key_return = K1_2;break;               
 case 0b00001011: key_return = K1_3;break;              
 case 0b00010110: key_return = K2_1;break; 
 case 0b00010101: key_return = K2_2;break; 
 case 0b00010011: key_return = K2_3;break; 
 case 0b00100110: key_return = K3_1;break; 
 case 0b00100101: key_return = K3_2;break; 
 case 0b00100011: key_return = K3_3;break; 
 case 0b01000110: key_return = K4_1;break;
 case 0b01000101: key_return = K4_2;break;  
 case 0b01000011: key_return = K4_3;break;
  }
  key_state++;
}
     else
key_state--;
break;
case2:
  PORTD=0b00000111;
  PORTD=0b00000111;
  if((Key_mask&PIND)==Key_mask)
        key_state=0;
break;   
   }
      return key_return;
}
void main(void)
{
  unsigned char i,key_temp;
    PORTA=0x00;
DDRA=0xFF;
    PORTC=0xFF;
DDRC=0xFF;
PORTD=0xFF;
DDRD=0xF8;
TCCR0=0x0B;
TCNT0=0x00;
OCR0=0x7C;
TIMSK=0x02;
for(i=0;i<8;i++)
{dis_buff[i]=12;}
SREG=SREG|0x80;
while(1)
{  
if(key_time_ok)
{
key_time_ok=0;
key_temp=read_keyboard();
if(key_temp!=No_key)
{
  for(i=0;i<7;i++)
  {dis_buff[i]=dis_buff[i+1];}
  dis_buff[7]=key_temp;
}  
}
 };
}
这程序有哪些错可以帮忙纠正吗，硬件要怎么接线