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        msp430單片機的ds18b20測溫度c程序
        
						
        
				作者：
				時間：2016-11-27
				來源：網絡

							
				
				
				
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        // 功能函數定義

        unsigned char DS18B20_Init(void){
        unsigned char result;
        DS18B20_DIR |= DS18B20_DQ;// ow output
        DS18B20_OUT &= ~DS18B20_DQ;// DS18B20_DQ=0;
        DelayX10us(48);// Bus master pulling low 480us minimum;
        DS18B20_OUT |= DS18B20_DQ;// DS18B20_DQ=1;
        DelayX10us(6);// Resister pull up 15-60us;
        DS18B20_DIR &= ~DS18B20_DQ;// ow input
        result = DS18B20_IN & DS18B20_DQ;
        DS18B20_DIR |= DS18B20_DQ;// ow output
        DelayX10us(48);// End of timeslot total 480us;
        return(result);// any 1 wire device ?result:=1 no devide; ?result:=0 have device;
        }//Intialization the 1-wire devices;

        unsigned char DS18B20_Init_2(void){
        unsigned char result;
        DS18B20_DIR |= DS18B20_DQ_2;// ow output
        DS18B20_OUT &= ~DS18B20_DQ_2;// DS18B20_DQ=0;
        DelayX10us(48);// Bus master pulling low 480us minimum;
        DS18B20_OUT |= DS18B20_DQ_2;// DS18B20_DQ=1;
        DelayX10us(6);// Resister pull up 15-60us;
        DS18B20_DIR &= ~DS18B20_DQ_2;// ow input
        result = DS18B20_IN & DS18B20_DQ_2;
        DS18B20_DIR |= DS18B20_DQ_2;// ow output
        DelayX10us(48);// End of timeslot total 480us;
        return(result);// any 1 wire device ?result:=1 no devide; ?result:=0 have device;
        }//Intialization the 1-wire devices;


        unsigned char DS18B20_ReadBit(void){
        unsigned char result;
        DS18B20_DIR |= DS18B20_DQ;// ow output
        DS18B20_OUT &= ~DS18B20_DQ;// DS18B20_DQ=0;
        _NOP();// Start of timeslot;
        DS18B20_OUT |= DS18B20_DQ;// DS18B20_DQ=1;
        _NOP();_NOP();_NOP();_NOP();
        // Wait from the start;
        DS18B20_DIR &= ~DS18B20_DQ;// ow input
        result = DS18B20_IN & DS18B20_DQ;
        DS18B20_DIR |= DS18B20_DQ;// ow output
        return(result);// return the result of the 1-wire devide;
        }//Read a bit on the 1-wire bus;

        unsigned char DS18B20_ReadBit_2(void){
        unsigned char result;
        DS18B20_DIR |= DS18B20_DQ_2;// ow output
        DS18B20_OUT &= ~DS18B20_DQ_2;// DS18B20_DQ=0;
        _NOP();// Start of timeslot;
        DS18B20_OUT |= DS18B20_DQ_2;// DS18B20_DQ=1;
        _NOP();_NOP();_NOP();_NOP();
        // Wait from the start;
        DS18B20_DIR &= ~DS18B20_DQ_2;// ow input
        result = DS18B20_IN & DS18B20_DQ_2;
        DS18B20_DIR |= DS18B20_DQ_2;// ow output
        return(result);// return the result of the 1-wire devide;
        }//Read a bit on the 1-wire bus;


        void DS18B20_WriteBit(unsigned char oww_dat){
        DS18B20_DIR |= DS18B20_DQ;// ow output
        DS18B20_OUT &= ~DS18B20_DQ;// DS18B20_DQ=0;
        if (1 == oww_dat)
        DS18B20_OUT |= DS18B20_DQ;// DS18B20_DQ=1;
        DelayX10us(10);// Remain the state for 100us;
        DS18B20_OUT |= DS18B20_DQ;// DS18B20_DQ=1;
        }//Write a bit to the 1-wire bus;

        void DS18B20_WriteBit_2(unsigned char oww_dat){
        DS18B20_DIR |= DS18B20_DQ_2;// ow output
        DS18B20_OUT &= ~DS18B20_DQ_2;// DS18B20_DQ=0;
        if (1 == oww_dat)
        DS18B20_OUT |= DS18B20_DQ_2;// DS18B20_DQ=1;
        DelayX10us(10);// Remain the state for 100us;
        DS18B20_OUT |= DS18B20_DQ_2;// DS18B20_DQ=1;
        }//Write a bit to the 1-wire bus;


        unsigned char DS18B20_ReadByte(void){
        unsigned char i;
        unsigned char result=0;
        for(i = 0; i8; i++){
        if(DS18B20_ReadBit())
        result |= 0x01 < i;
        DelayX10us(12);// ??
        }
        return(result);// return the result of the 1-wire device;
        }//Read a byte from the 1-wire bus;

        unsigned char DS18B20_ReadByte_2(void){
        unsigned char i;
        unsigned char result=0;
        for(i = 0; i8; i++){
        if(DS18B20_ReadBit_2())
        result |= 0x01 < i;
        DelayX10us(12);// ??
        }
        return(result);// return the result of the 1-wire device;
        }//Read a byte from the 1-wire bus;


        void DS18B20_WriteByte(unsigned char oww_dat){
        unsigned char i,temp;
        for(i = 0; i8; i++){
        temp = oww_dat >> i;
        temp &= 0x01;
        DS18B20_WriteBit(temp);
        }
        DelayX10us(7);// ??
        }//Write a byte to the 1-wire bus;

        void DS18B20_WriteByte_2(unsigned char oww_dat){
        unsigned char i,temp;
        for(i = 0; i8; i++){
        temp = oww_dat >> i;
        temp &= 0x01;
        DS18B20_WriteBit_2(temp);
        }
        DelayX10us(7);// ??
        }//Write a byte to the 1-wire bus;
        
				
            
                
			
							
        
                
			            
                            
              
            
        
		
        
		
        
		
        
		
        
		
        
			
          
				
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            			            msp430單片機ds18b2
                        
            
        
            
			
        
		
        	
		

	

        
	
	
        
		
        
			
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