ad7715芯片的控制代码，ps2键盘代码，和语言播报-ad7715 chip control code, ps2 keyboard code, and language broadcast

this source code for led matrix project with ps2 keyboard,this project use a arduino duemilanove for cpu.thank you.-this is source code for led matrix project with ps2 keyboard,this project use a arduino duemilanove for cpu.thank you.