現場總線控制系統的推廣和應用，迫切需要自主開發總線型智能儀表來替代傳統儀
表。本文選用帶有CAN 總線接口的68HCS12 系列微控制器和MPX5000 系列壓力傳感器，
開發了一種基于微控制器的總線型壓力測控系統。硬件設計方面主要包括微控制器模塊、傳感器模塊、液晶顯示模塊、通信模塊、電源模塊以及儀表的抗干擾措施的設計;軟件方面運用模塊化設計方法，繪制了程序流程圖，采用匯編語言與C 語言混合編寫。
關鍵字: 測控系統；微控制器；壓力；總線
Abstract: The application of the CAN control system requires intelligent instrument based on
CAN to take the place of traditional instrument. In order to meet with requirements of fieldbus
instruments, an pressure measuring and controlling system based on microprocessor with fieldbus technology is developed. It is exploited using MPX5000 series pressure sensor and 68HCS12 series microcontroller with CAN interface. For the hardware design, it introduced several modules including the microcontroller module, the sensor module, the LCD module, the communication module, the power module and the anti-jamming measures. The software is programmed via C and assembly language.
Keywords: Measuring and Controlling System; Microcontroller; Pressure; Bus