基于FPGA的温度计设计。感温原件测量环境温度并显示在七段数码管上，可选择华氏温度或摄氏温度显示，超过预设温度有提示音，超过温度上限后会发出警报。- FPGA-based design of the thermometer. Original ambient temperature measured and displayed on the seven-segment LED, selectable Fahrenheit or Celsius temperature display, tem