main.i

用AVR实现简单按键的程序与proteus的结合

#line 1 "F:\电子设计\proteus\RUNNIN~1\main.c"














void port_init(void)
{
 PORTA = 0x0F;
 DDRA  = 0x0F;
 PORTB = 0x0F;
 DDRB  = 0x00;
 PORTC = 0x00;
 DDRC  = 0x00;
 PORTD = 0xFF;
 DDRD  = 0x05;
}


void init_devices(void)
{

 CLI();
 port_init();

 MCUCR = 0x00;
 GICR  = 0x00;
 TIMSK = 0x00;
 SEI();

}

void delay(void)
{
 unsigned char i;
 for(i=254;i!=0;i--)
 {
  asm("nop");
 }
}

void main(void)
{
 unsigned char temp;
 init_devices();
 while(1)
 {
  temp=PINB;
  delay();
  if(temp==PINB)
  {
  PORTA=PINB;
  }
 }
}