基于ARM Cortex-M4F(TM4C123)单片机 ，用微控制器的I2C模块接TMP75数字温度传感器测温；按要求对测温结果进行处理
【基本功能】
（1）使用Timer 定时方式测温，测温频率2次/秒
（2）从UART 输出实时温度，温度值以如下方式显示:
　　 Actual temperature = 34.9375 Centigrade. （每0.5秒更新一次）
（3）在液晶屏上显示实时温度，按如下方式显示。（每0.5秒更新）
　　 第1行: 温度寄存器字节1，T11-T4，HEX或DEC格式均可
　　 第2行: 温度寄存器字节2，T3-T0，HEX或DEC格式均可
　　 第3行: 温度= 20.0625 ℃ （包括小数）(Based on the ARM Cortex-M4F (TM4C123) MCU, the I2C module of the microcontroller is connected with the TMP75 digital temperature sensor to measure the temperature, and the temperature measurement result is processed according to the requirement.
[basic function]
(1) use Timer timing mode to measure the temperature and measure the frequency 2 times / sec.
(2) output real-time temperature and temperature values from UART display as follows:
Actual temperature = 34.9375 Centigrade. (updated every 0.5 seconds)
(3) display the real-time temperature on the LCD screen as shown in the following way. (update every 0.5 seconds)
First line: temperature register byte 1, T11-T4, HEX or DEC format can be.
Second line: temperature register byte 2, T3-T0, HEX or DEC format can be.
Third lines: temperature = 20.0625 C (including decimal))