text1.c

液晶1602程序

#include<reg52.h>
sbit a_0=ACC^0;
bit flag=0;
sbit DQ=P2^2;
#define T_CONVER 0x44
#define T_CONFIG 0x5f              
#define T_READ   0xbe
#define T_WRITE 0x4e
#define T_ROM_JMP 0xcc
#define T_C0PY_E2 0x48
#define T_RECALL_E2 0xb8
#define T_cont   0.0625
bit T_sign;
unsigned char t_bai,t_shi,t_ge,t_fen,t_miao;

#define LCM1602_DB0_DB7 P0
sbit  LCM1602_RS=P3^5;
sbit  LCM1602_RW=P2^0;
sbit  LCM1602_E=P3^4;
sbit  LCM1602_Busy=P0^7;
unsigned char code DS18B20[]={"DS18B20 OK!"};
unsigned char code welcome[]={"High Sensor Temp"};
unsigned char code welcome1[]={"MADE By:ZhangHu"};
unsigned char code Temp[]={"Temp: "};


void delay(unsigned int delay_time)
{ while(delay_time--);}

void DS18B20_INIT()
{unsigned char i=1;
 while(flag==0)
 {DQ=1;
 delay(8);
 DQ=0;
 delay(52);
 DQ=1;
 delay(2);
 while(1)
  {i=DQ;
  if(i==0)
  {flag=1;
 delay(10);
 break;
 }}}
 flag=0;}


 
void DS18B20_send(unsigned char out_data)
{
 unsigned char i=0;
 for(i=8;i>0;i--)
 {DQ=0;
 ACC=out_data&0x01;
 DQ=a_0;
 delay(5);
 DQ=1;
 out_data>>=1;
 }}

 unsigned char DS18B20_read(void)
 {
  unsigned char i,in_data;
  in_data=0;
  for(i=8;i>0;i--)
  { DQ=0;
 in_data>>=1;
 DQ=1;
 if(DQ)
 in_data|=0x80;
 delay(4);}
 return(in_data);}

  
void ReadTemperature()
	   { float temp;
	   unsigned int y;
	    unsigned char T_L=0;
		unsigned char T_H=0;
		unsigned char k;
		DS18B20_INIT();
		DS18B20_send(T_ROM_JMP);
		DS18B20_send(T_CONVER);
		DS18B20_INIT();
		DS18B20_send(T_ROM_JMP);
		DS18B20_send(T_READ);
		T_L=DS18B20_read();
        T_H=DS18B20_read();
		
		k=T_H&0xf8;
		if(k==0xf8) 
		T_sign=1;
		else 
		T_sign=0;
		
		T_H=T_H&0x07;
		temp=(T_H*256+T_L)*T_cont;
        temp=temp*100;
		t_bai=(signed int)temp/10000;
		y=(signed int)temp%10000;
		t_shi=y/1000;
		y=(signed int)y%1000;
		t_ge=y/100;
		y=(signed int)y%100;
		t_fen=y/10;
		t_miao=(signed int)y%10;
		}

		
void LCM1602_Delay(unsigned char count)
{ unsigned char i;
while(--count!=0)
{for(i=0;i<125;i++);}}
    
void  LCM1602_TestBusy(void)
{do{LCM1602_DB0_DB7=0xff;
                     LCM1602_RS=0;
					 LCM1602_RW=1;
					 LCM1602_E=0;
					 LCM1602_Delay(2);
                     LCM1602_E=1;
					 }
					 while(LCM1602_Busy);}

					 void LCM1602_WriteCmd(unsigned char LCM1602_command)
					 {LCM1602_DB0_DB7=LCM1602_command;
					  LCM1602_RS=0;
					 LCM1602_RW=0;
					 LCM1602_E=0;
					 //LCM1602_Delay(2);
					 LCM1602_TestBusy();
                     LCM1602_E=1;}
					   
					 void LCM1602_WriteData(unsigned char LCM1602_data)
					 {LCM1602_DB0_DB7=LCM1602_data;
					 LCM1602_RS=1;
					 LCM1602_RW=0;
					 LCM1602_E=0;
					 //LCM1602_Delay(2);
					 LCM1602_TestBusy();
                     LCM1602_E=1;
					}

					void LCM1602_Init(void)
                    {LCM1602_WriteCmd(0x01);
					//LCM1602_Delay(2);
                     LCM1602_WriteCmd(0x38);
					 //LCM1602_Delay(2);
                     LCM1602_WriteCmd(0x06);
					// LCM1602_Delay(2);
                     LCM1602_WriteCmd(0x0c);
					 //LCM1602_Delay(2);
                
					 }
			
			   	void print(unsigned char a,unsigned char *str)
				{
				 LCM1602_WriteCmd(a);
				 while(*str!='\0')
				 { LCM1602_WriteData(*str++);}
				 *str=0;}
				 
				 void print1(unsigned char B,unsigned char t)
				 {
				  LCM1602_WriteCmd(B);
                  LCM1602_WriteData(t);} 

				  void main(void)
				  {
				   LCM1602_Init();
                   print(0x80,welcome);
				  print(0xc0,welcome1);
				   //print(0xC0,DS18B20);
			      LCM1602_Init();
                   while(1)
				   {
				    ReadTemperature();
				    print(0x80,DS18B20);
					 print(0xc0,Temp);
					 if(T_sign==1)
					 print1(0xc7,0x2b);
					 if(t_bai!=0)
					 print1(0xc8,t_bai+0x30);
					 else 
					 print1(0xc8,0x20);
                     print1(0xc9,t_shi+0x30);
					 print1(0xca,t_ge+0x30);
					 print1(0xcb,0x2e);
					 print1(0xcc,t_fen+0x30);
					 print1(0xcd,t_miao+0x30);
					 print1(0xce,0x43);
}
}