摘要：美国德州仪器公司推出的MSP430系列单片机具有低功耗、高性能及丰富的片上外围模块等优点，适合用于手持式仪器仪表中；其中MSP430FG43X单片机内部集成有可编程模拟运放等模块更适合用于便携式医疗器械中。文中给出了心率参数测量的理论基础，提出了心率测量仪设计的整体方案，对各子模块设计进行了详细的方案论证。硬件设计采用Protel 99 SE软件，完成了系统的电源电路、时钟电路，心电信号采集与预处理电路、LCD显示电路、与PC机通信接口电路等模块的电路原理图及PCB板图的设计与实现。软件设计完成了程序模块规划，心电信号处理、心率值计算及各接口模块的程序设计；给出了系统初始化，心电信号处理，心率值计算及LCD心率显示等模块程序设计的详细流程；在EW430 V3.20A开发平台下，通过与PC机相连的MSP430FETP140仿真器，将程序下载到MSP430FG439芯片的FLASH中，实现了心电信号的采集、处理、显示的编程与调试。通过系统软硬件联机调试，完成了心率测量仪的设计。给出了设计过程中遇到问题的分析与处理结果。
关键词：心率测量；MSP430FG439；INA321
Design of Heart Rate Meter Based on MSP430
Abstract: The Texas Instruments’ MSP430 series
microcontroller are widely used in portable apparatus, which have
the advantages of ultra-low power, high performance and rich
peripheral modules, especially the MSP430FG439 has the programmable
amplifier which is suitable for portable medical instrument. The
principle and design scheme of measuring heart rate is described in
the dissertation. Protel 99SE is used in hardware design, which
completed schematic and printed circuit board (PCB) design
including power supply circuit, clock circuit, electrocardiogram
(ECG) signal gathering and pretreatment circuit, liquid crystal
display (LCD) circuit，the communication circuit between MSP430 and
Person Computer (PC). The detailed flow chart of modular
programming, system initialization, ECG signal processing, heart
rate’s calculating and displaying is given in software design.
Under platform of IAR Embedded Workbench for MSP430 V3.20A (EW430
V3.20A), through the MSP430FETP140 emulator which connected to the
PC, the programs can be downloaded to the target chip’s flash
memory, realized the capture, disposal, display's programming and
debugging of the ECG. signal.
Key words: Heart rate measurement, MSP430FG439, INA321
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