这篇应用报告描述了一种低成本,基于 MSP430™ LaunchPad Value Line开发工具包(MSP-EXP430G2)的监测心率解决方案,此开发工具包使用MSP430G2xx微控制器(MCU)。心电图(EKG)信号在被送到微处理器取样和处理之前已经被一块子板放大和过滤。每分钟心跳数据通过Lanuchpad上的反向通道UART-overUSB传送给电脑。而且,可以通过一个连接在子板上的六排针的eZ430射频(RF)目标使用 SimplicitTI™网络协议来无线传输数据。此系统电源可来自USB电源,一个CR20323伏纽扣电池,或者两个AA/AAA电池。
目录
1 简介 ........................................................................................................................... 2
2 硬件描述 ...................................................................................................................... 3
3 软件 ........................................................................................................................... 6
4 参考 ........................................................................................................................... 7
Appendix A 放大器的选择 ....................................................................................................... 9
Appendix B 使用反向通道UART的USB有线连接演示 ...................................................................... 11
Appendix C 通过eZ430射频目标板的无线UART演示 ....................................................................... 13
Appendix D 硬件原理图 ........................................................................................................ 15
List of Figures
1 人体心脏解剖图(左)和心电图(右) .................................................................................... 2
2 手指检测电路原理图 ........................................................................................................ 3
3 软件流程图................................................................................................................... 6
4 心率监测设置(左边)和电脑上的UART输出(右边) ................................................................ 7
5 硬件原理图(1/2页) ......................................................................................................... 15
6 硬件原理图(2/2页) ......................................................................................................... 16
List of Tables
1 LaunchPad端口/引脚功能对应表 - 左排针 ............................................................................... 4
2 LaunchPad端口/引脚功能对应表 - 右排针 ............................................................................... 4
3 电源电流消耗 ................................................................................................................ 5
4 仪表放大器的比较........................................................................................................... 9
5 运放的比较 ................................................................................................................. 10