使用NEC的UPD78F9222的做的空气净化器的源码.-Using NEC s UPD78F9222 the source of the air purifier.

车载净化器，实现空气净化，加热等功能。包含了定时器，AD转换，按键扫描等功能的实现-Car Purifier achieve air purification, heating and other functions. It contains the implementation of timers, AD conversion, key scan function