基于FPGA的数字温度计设计  

Design of digital thermometer based on FPGA

作　　者：王庆春[1] 何晓燕[2] 

机构地区：[1]安康学院电子信息技术研究中心,安康725000 [2]安康学院数学与统计学院,安康725000

出　　处：《国外电子测量技术》2017年第4期94-98,共5页Foreign Electronic Measurement Technology

基　　金：陕西省教育厅科研项目(14JK1018);安康学院研究项目(JG08103)资助

摘　　要：为了采用FPGA技术开发出低成本的温度测量系统,通过分析数字温度传感器DS18B20的单总线通信协议,严格按照传感器的通信时序要求,使用有限状态机(FSM)设计出了DS18B20的单总线通信控制器(IP核)。并以此单总线控制器为核心在EP2C8Q208C8FPGA开发板上开发出了完整的温度测量与显示系统,最终的测试结果表明,所设计的单总线控制器不但能够稳定驱动DS18B20进行温度参数的测量,而且在FPGA片上构建的测温系统硬件实现代价低至了410个逻辑单元、完成一次温度测量的用时也只有754.7ms。AIn order to develop a low cost temperature measurement system based on FPGA, through analyzing the 1-wire bus communication protocol of digital temperature sensor DS18B20 in this paper, strictly according with the communica- tion timing requirements of sensors, the 1-wire bus communication controller （IP core） had been designed with finite state machine （FSM）. Moreover, the 1-wire bus controller core and other modules form a complete temperature meas- urement and display system on EP2C8Q208C8 FPGA development board, the final test results show that the 1-wire bus controller not only can drive the DS18B20 stably to measure the temperature, and the temperature measurement system based on FPGA in the hardware implementation cost low to 410 Logic Elements （LEs）, a temperature measurement time only 754.7ms.

关 键 词：FPGA DS18B20温度传感器 有限状态机 数字温度计 

分 类 号：TN06[电子电信—物理电子学]