STC单片机进行四路AD转化并送LCD串行显示-STC microcontroller four AD converted and sent to the LCD serial display

自己写的STC单接口AD键盘，只需一个AD口驱动16字键盘-Write your own STC single interface to AD keyboard, just a 16-character keyboard port driver AD

STC单片机IO模拟串行SPI读写AD转换芯片ADS7822，可简单移植后直接使用，单片机时钟采用12M外接晶振。-STC microcontroller serial IO simulation SPI writable AD conversion chip ADS7822, can simply be used directly after transplantation, microcontroller clock uses 12M external crystal.