本温度采集系统是利用DS18B20把温度读出，然后通过单片机解码发送给6位数码管，数码管显示出当前的温度值。DS18B20返回的温度值是两字节的十六进制数据。负数用反码表示。单片机直接通过串口把两字节的十六进制数据传送到上位机，上位机对温度数据进行解码变显示。

　　单片机的串口参数可以通过，下面两个宏来设置：

　　#define XTAL 11059200 // CUP　　晶振频率

　　#define baudrate 9600 // 通信波特率

默认设置如上。

-The temperature acquisition system is to use DS18B20 to read the temperature, and then through the single-chip decoding is sent to the 6 digital tube, digital tube displays the current temperature value. Return to the DS18B20 temperature value is two byte sixteen hexadecimal data. Negative with complement representation. MCU directly through the serial port to two bytes sixteen hexadecimal data transfer to PC, PC on temperature data are decoded into display.



MCU serial port parameters can be obtained by the following two macros to set:



# define XTAL 11059200/CUP oscillator frequency



# define baudrate 9600// communication baud rate



The default settings above.