这是4x4的键盘扫描程序，已验证且灵敏度很高不加上拉，不是扫描方式，只提取特征码。只要4竖线，4横线。-This is a 4x4 keyboard scanner, a high sensitivity has been verified and do not pull with, rather than scanning only signature extraction. As long as 4 vertical, 4 horizontal.

ST7735R驱动芯片的1.77寸彩色液晶8位并口驱动程序。参考时下了很多本站别的代码，感觉写的都不好，要么不全，要么不是并口。现在把我写的传上来供后来人参考。包括底层写命令、数据、初始化、画点、画横线、画竖线，带注释，希望对你有用。-ST7735R driver chip 1.77-inch color LCD 8-bit parallel port driver. Reference nowadays many site other code, feel to write is not go