121 capacitive keyboard development information, schematics, c51 source.

touch_shield客户资料\Code\Touch_Shield_Example\types.h
....................\....\....................\mpr121.h
....................\....\....................\defs.h
....................\....\Touch_Shield_Example
....................\....\....................\Touch_Shield_Example.ino
....................\....\....................\i2c.h
touch_shield客户资料
....................\Code
....................\....\MPR121 Touch Shield 产品测试指南.docx
....................\....\MPR121测试程序 51单片机.rar
....................\MPR121.pdf
....................\MPR121快速使用指南.pdf
....................\原理图
....................\......\Touch Shield.pdf

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