numled.c

这是关于AVR单片机学习的初步开发

//ICC-AVR application builder : 2005-3-2 下午 09:56:10
// Target : M8
// Crystal: 11.059Mhz

#include <iom8v.h>
#include <macros.h>

char num[10] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

void port_init(void)
{
 PORTB = 0xCF;
 DDRB  = 0x30;
 PORTC = 0x4F; //m103 output only
 DDRC  = 0x30;
 PORTD = 0xFF;
 DDRD  = 0xFF;
}

//call this routine to initialise all peripherals
void init_devices(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 port_init();

 MCUCR = 0x00;
 GICR  = 0x00;
 TIMSK = 0x00; //timer interrupt sources
 SEI(); //re-enable interrupts
 //all peripherals are now initialised
}

void delay(void)
{
 unsigned int i,j,z;
 for(i=0;i<10000;i++);
 {	for(j=0;j<10000;j++)
 	{	for(z=0;z<100;z++);}
 }
}


void main(void)
{
 char i;
 init_devices();
 
 while(1)
 {
 PORTB |= 0x10;//位选1
 for(i=0;i<=9;i++)
 {	PORTD = num[i];
 	delay();
 } 
 PORTB &= ~0x10;
  
 PORTB |= 0x20;//位选2
 for(i=0;i<=9;i++)
 {	PORTD = num[i];
 	delay();
 }
 PORTB &= ~0x20;
  
 PORTC |= 0x10;//位选3
 for(i=0;i<=9;i++)
 {	PORTD = num[i];
 	delay();
 }
 PORTC &= ~0x10;
 
 PORTC |= 0x20;//位选4
 for(i=0;i<=9;i++)
 {	PORTD = num[i];
 	delay();
 }
 PORTC &= ~0x20;
 
 }   
}