test104.c

x9c104数控电阻的ＡＶＲ驱动程序

//ICC-AVR application builder : 2005-9-11 2:37:04
// Target : M16
// Crystal: 7.3728Mhz

#include <iom16v.h>
#include <macros.h>

void port_init(void)
{
 PORTA = 0x00;
 DDRA  = 0x00;
 PORTB = 0x00;
 DDRB  = 0x60;
 PORTC = 0x00; //m103 output only
 DDRC  = 0x00;
 PORTD = 0x00;
 DDRD  = 0x00;
}

//call this routine to initialize 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 initialized
}

/*-----------------------------------------------------------------------
延时函数
系统时钟：8M
-----------------------------------------------------------------------*/
void delay_1us(void)                 //1us延时函数
  {
   asm("nop");
  }

void delay_nus(unsigned int n)       //N us延时函数
  {
   unsigned int i=0;
   for (i=0;i<n;i++)
   delay_1us();
  }
  
void delay_1ms(void)                 //1ms延时函数
  {
   unsigned int i;
   for (i=0;i<1141;i++);
  }
  
void delay_nms(unsigned int n)       //N ms延时函数
  {
   unsigned int i=0;
   for (i=0;i<n;i++)
   delay_1ms();
  }
  
  
void delay(unsigned int x)  //1.5us左右
{
     while(x)
    {
       x--;
    }
}

//绿线,方向线,PD5
//黄线,加减线,PD6
void main(void)
{
 unsigned char i;
 init_devices();
 while(1)
 {
  PORTB|=(1<<5);
  for(i=0;i<50;i++)
   {
    PORTB|=(1<<6);
	delay_nms(500);
	PORTB&=~(1<<6);
	delay_nms(10);
   }
  delay_nms(5000);
  PORTB&=~(1<<5);
   for(i=0;i<50;i++)
   {
    PORTB|=(1<<6);
	delay_nms(500);
	PORTB&=~(1<<6);
	delay_nms(10);
   } 
 }
}