Pressure Measuring and Controlling System with Bus Structure based on Microcontroller

The application of the CAN control system requires intelligent instrument based on CAN to take the place of traditional instru-ment. 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.