main.c

AVR单片机ATmega16(L)应用实例—红外线转速仪

//ICC-AVR application builder : 2007-9-20 10:30:53
// Target : m16
// Crystal: 8.0000Mhz

#include <iom16v.h>
#include <macros.h>
#include "head.h"
#define uchar unsigned char
#define uint unsigned int
#define xtal 8

extern void WaitForEnable(void);
extern void LcdWriteData(uchar W);
extern void LcdWriteCommand(uchar CMD,uchar Attribc);
extern void InitLcd(void);
extern void Display(uchar dd);
extern void DisplayOneChar(uchar x,uchar y,uchar Wdata);
extern void ePutstr(uchar x,uchar y,uchar const *ptr);

		
uchar Start=0,WorkFlag;
uint WorkTime,DisTime,Counter;
uint DisVal;
uint cnt;
uchar Flag,IntFlag,JS=0;
uint tx,cx;
uint disx[4];
uchar DisFlag=1,EndFlag,BeginFlag=0;

const uchar cs0[]={"ShangHai"};//欢迎界面
const uchar cs1[]={"-Tester-"};//欢迎界面
const uchar cs2[]={"Testing-"};//测试界面
const uchar dsp[]={"RPM:    "};//测试界面

//TIMER2 initialize - prescale:64
// WGM: Normal
// desired value: 1mSec
// actual value:  1.000mSec (0.0%)
void timer2_init(void)
{
 TCCR2 = 0x00; //stop
 ASSR  = 0x00; //set async mode
 TCNT2 = 0x83; //setup
 OCR2  = 0x7D;
 TCCR2 = 0x04; //start
}

void port_init(void)
{
 PORTA = 0x00;
 DDRA  = 0xFF;
 PORTB = 0x00;
 DDRB  = 0xFF;
 PORTC = 0x00; //m103 output only
 DDRC  = 0x00;
 PORTD = 0xFF;
 DDRD = 0xFF;
 DDRD  = 0x63;
}

//call this routine to initialize all peripherals
void init_devices(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 port_init();
 timer2_init();

 MCUCR = 0x01;
 GICR  = 0x40;
 TIMSK = 0x40; //timer interrupt sources
 SEI(); //re-enable interrupts
 //all peripherals are now initialized
}

/**********************欢迎界面********************/
void display1(void)
{
LcdWriteCommand(0x01,1); //清屏，检测忙信号
ePutstr(0,0,cs0);
ePutstr(0,1,cs1);
}

void display2(void)
{
LcdWriteCommand(0x01,1); //清屏，检测忙信号
ePutstr(0,0,cs2);
ePutstr(0,1,dsp);
}

//****************************************
void Delay_1ms(void)		//1mS延时子函数
{ uint i;
 for(i=1;i<(uint)(xtal*124);i++)
    ;
}
//=============================================
void Delay_nms(uint n)		//n*1mS延时子函数
{
 uint i=0;
   while(i<n)
   {Delay_1ms();WDR();
    i++;
   }
}

/**********************主函数*****************************/
void main(void)
{	uchar temp;
    float count,time,x;
	Delay_nms(400);
	init_devices();
	InitLcd();
	display1();	   //显示Test界面
	Delay_nms(2000);
	display2();		   //显示Work状态
	DisFlag=1;
	      
	/********************************************/
		while(1)               //无限循环
		{  WDR();
		     
		   	if(DisFlag==1)//如果显示标志为1
		   	{
				  time=(float)tx;count=(float)cx;
				  x=count/time;x=x*30000;DisVal=(uint)x;//数学计算
				  
				  disx[3]=(DisVal/1000)%10;disx[2]=(DisVal/100)%10;
				  disx[1]=(DisVal%100)/10;disx[0]=DisVal%10;
				  DisplayOneChar(4,1,disx[3]+0x30);//显示数据
				  DisplayOneChar(5,1,disx[2]+0x30);
				  DisplayOneChar(6,1,disx[1]+0x30);
				  DisplayOneChar(7,1,disx[0]+0x30);
				  DisFlag=0;WorkTime=0;DisTime=0;EndFlag=0;
				  Start=0;cnt=0;
			}
			else  		//否则进行取样
			{     
			do{temp=PIND&0x04;WDR();JS=1;//等待下降沿后下一次测试
			    if(Counter>1500){Counter=0;JS=0;DisFlag=1;cx=0;goto END;}
			  }
			 while(temp==0x04);
				  BeginFlag=1;Start=1;GICR=0x40;//重开INT0
			END:;	  
			}
		}
}		   

#pragma interrupt_handler timer2_ovf_isr:5
void timer2_ovf_isr(void)
{
 TCNT2 = 0x83; //reload counter value
 SEI();
 if(BeginFlag==1)
  {
   DisTime++;
   if(DisTime>1300){DisFlag=1;DisTime=0;BeginFlag=0;} //开显示
  } 
   if(Start==1){WorkTime++;}
   if(WorkTime==1000){EndFlag=1;}
   if(JS==1)Counter++;	
   
}

#pragma interrupt_handler int0_isr:2
void int0_isr(void)
{
uchar y;
SEI();	
 //external interupt on INT0
 	y=PIND&0x04;
	 JS=0;Counter=0;	
	 if((Start==1)&&(y==0x00))cnt++;
	 //**********************
	 if((Start==1)&&(y==0x04))
	 {  
	    cnt++;
	    if(EndFlag==1){tx=WorkTime;cx=cnt;EndFlag=0;
						Start=0;GICR=0x00;}//关闭INT0中断
	 }
	
 }