基于HART协议的智能仪器HART通信的实现

Basing on the analysis of the feature and application of HART protocol, the paper has designed a communication module used for instrument based on HART, which includes host and slave units, includes hardware circuits and software design. The design has used ultra Low-Power Consumption and High-Performance MCU MSP430F149 and HART Modulation-demodulation Special-purpose Chip SYM20C15 .Compare with the traditional design, the design has improved the integrated level, the reliability of communication, and reduced the power consumption. The design can be used for the transformation of traditional instruments into HART instruments, and the design of communication ports of HART-compliant instruments. The reliability of the designed HART communication has demonstrated the feasibility of the design.