iar9-8.c

手把手教你学AVR单片机C程序设计实验程序

#include <iom16.h>
#include<intrinsics.h>
#include "lcd1602_8bit.c"
uchar __flash title1[]={"ICP test"};
uchar __flash title2[]={"ICP1:"};
#define uchar unsigned char
#define uint unsigned int
#define xtal 8
uint value;
uchar flag=0x00;

void port_init(void)		
{	
 DDRA=0xff;
 PORTA=0x00;
 DDRB=0xff;
 PORTB=0x00;
 PORTD = 0xff; 
 DDRD  = 0xff;
 __no_operation();
 DDRD  = 0x00;
}	

void timer1_init(void)
{
 TCCR1B = 0x00; //stop
 TCNT1H = 0x00; //setup
 TCNT1L = 0x00;
 OCR1AH = 0x1E;
 OCR1AL = 0x84;
 OCR1BH = 0x1E;
 OCR1BL = 0x84;
 ICR1H  = 0x1E;
 ICR1L  = 0x84;
 TCCR1A = 0x00;
 TCCR1B = 0x05; //start Timer
}

/*********************************************/
void init_devices(void)	
{	
 __disable_interrupt(); //disable all interrupts  
 port_init();		
 timer1_init();	
 MCUCR = 0x00;
 GICR  = 0x00;
 TIMSK = 0x24; //timer interrupt sources
 __enable_interrupt();//re-enable interrupts 
}							

/******************主函数******************/
void main(void)
{	
init_devices();
Delay_nms(400);
InitLcd();
ePutstr(4,0,title1);
ePutstr(3,1,title2);
    while(1)			
    {	
       DisplayOneChar(8,1,(value/10000)+0x30); 
       DisplayOneChar(9,1,((value%10000)/1000)+0x30); 
       DisplayOneChar(10,1,((value%1000)/100)+0x30); 
       DisplayOneChar(11,1,((value%100)/10)+0x30); 
       DisplayOneChar(12,1,(value%10)+0x30); 
    }
}

#pragma vector=TIMER1_CAPT_vect
__interrupt void timer1_capt_isr(void)
{
 //timer 1 input capture event, read (int)value in ICR1 using;
 value=(uint)ICR1L;            //Read low byte first (important)
 value|=(uint)ICR1H << 8; //Read high byte and shift into top byte
}

#pragma vector=TIMER1_OVF_vect
__interrupt void timer1_ovf_isr(void)
{ __enable_interrupt();
 //TIMER1 has overflowed
 TCNT1H = 0x00; //reload counter high value
 TCNT1L = 0x00; //reload counter low value
}