main.c

avr mega128+数字温度传感器18B20测试程序

/*--------------------------------------------------*/
/*             AVR-ARM开发网论坛                    */
/*           http://www.avrarm.com                  */
/*            AVR生成代码测试程序                   */
/*--------------------------------------------------*/
/*     程序由AVR辅助开发工具V2.1.1自动生成          */
/*     AVR系统的处理器为：   ATMega128               */
/*     AVR系统的晶振频率：   8.0000 Mhz             */
/*--------------------------------------------------*/

#include <iom128v.h>
#include <macros.h>
#include "ds18b20.h"
#include "delay.h"
/*   定义OCMJ4X8端口   */
//DATA_PORT=PORTA
#define data_port PORTA
//ASK=PORTE.6
#define ask (PINE&0x40)
//ANSWER=PORTE.7
#define set_answer asm("sbi 0x03,7")
#define clr_answer asm("cbi 0x03,7")
//RESTE=PORTC.3
#define set_reset asm("sbi 0x15,3")
#define clr_reset asm("cbi 0x15,3") 
#define wait  asm("nop\n nop")
extern  void ocmj_init(void);
extern void ocmj_write(unsigned char data);
extern  void asc_tran(unsigned char x,unsigned char y,unsigned char *asc_p);
/*     OCMJ4X8LCD初始化    */
 extern   void ocmj_init(void)
    {
	 MCUCR=0;
	 DDRA=0xff;
	 PORTA=0xff;
	 DDRE=0b10000000;
	 PORTE=0xff;
	 clr_reset;//LCD复位
	 delay_nms(10);
	 set_reset;
	 clr_answer;
	 delay_nms(10);
	 }
/*            写数据到LCD        */
extern void ocmj_write(unsigned char data)
    {
	 while(ask!=0)
	      ;
     data_port=data;
   	 wait;
	 set_answer;
	 wait;
	 while(ask==0)
	      ;		  
	 clr_answer; 
    }
/*          传送ASCII字母到LCD            */
/*          x:0x00~0x0f y:0~64            */	
extern void asc_tran(unsigned char x,unsigned char y,unsigned char *asc_p)
    {
	 x+=4;
	 while((*asc_p)!=0)
	    {
		 ocmj_write(0xf1);
		 ocmj_write(x);
		 ocmj_write(y);
		 ocmj_write(*asc_p);
		 asc_p++;
		 if (x<0x13) 
		    x++;
		 else
		   {
		    x=0x04;
			y+=8;		    
		   }	
		}	
	 }
//-----------------------------------------------------------
//主函数
//-----------------------------------------------------------
void main(void)
{
    unsigned int  temp=0,temp1,temp2;
    unsigned char  str[20];
    CLI();     
   ocmj_init();
   ocmj_write(0xf4);
   SEI();
     temp=resetDS18B20();  //检测DS1302的存在
 
   while(1)
   {
 
	 unsigned int temp=0;
     temp=readTempDS18B20();
	 //temp=(temp*0.0625);
	 itoa(str,temp,10);
     
	 asc_tran(0,8,str); 

	}
}