tempre.c

个人单片机入门程序集合 。很适合刚学单片机的人。用的是keil proteus

#include<reg51.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char

#define lcd_bus P1
uchar offset=0x80;

// lcd
sbit rs=P3^0;
sbit rw=P3^1;
sbit e =P3^2;
/**********************定义PT2262接收引脚P2.0P2.1P2.2P2.3***************/
#define re_bus P2



delay(uchar d)
{
        while(--d);
}


/**********判断忙标志，返回的是一个位BF**********/
bit lcd_busy(void)
{
        uchar bflag;     
        rs=0;
        rw=1;
        _nop_();
        e=1;
        _nop_();
        lcd_bus=0xff;
        bflag=lcd_bus;
        e=0;
        return(bit)(bflag&0x80);    //BF=1 busy   
}



/*********写命令，有两个参数，第一个是要写的命令控制字，
第二个是用来控制是否进行忙标志的判断。
busyflag=1：判断；为 0：不判断****************/
void lcd_wrcmd(uchar cmd)
{
        while(lcd_busy());
        lcd_bus=cmd;
        rs=0;
        rw=0;
        _nop_();
        e=1;
        _nop_();
        _nop_();
        e=0; 
}


/************向液晶片写数据***************/
void lcd_wrdata( uchar lcddata)
{
        while(lcd_busy());
        lcd_bus=lcddata;
        rs=1;
        rw=0;
        _nop_();
        e=1;
        _nop_();
        _nop_();
        e=0;
}

/****************初始化***************/
void lcd_ini(void)
{
        lcd_wrcmd(0x38); 
        delay(100);
        lcd_wrcmd(0x0c);
        delay(100);
        lcd_wrcmd(0x06);
        delay(100);
        lcd_wrcmd(0x01);
        delay(100);
}

uchar re_temp(void)
{
   uchar  receive,remsb.relsb;
   do
   {re_bus=0xff;
    receive=re_bus;
    receive=receive&0x0f;
    }while(receive!=0x0f)
    remsb=receive;


   {receive=re_bus;
    receive=<<4;
    receive1=re_bus;
    re=receive|receive1;