一种51单片机接收电话线上DTMF(拨号DTMF的应用程序)文件列表: testdtmf ........\A51.EXE ........\C51.EXE ........\C51S.LIB ........\DISPLAY.C ........\ht9200.c ........\L51.EXE ........\MAIN.C ........\MAIN.HEX ........\main.LST ........\main.OBJ ........\OH51.EXE ........\OKEY.C ........\OTimer.c ........\PubDcl.dcl ........\REG52.H ........\SERIAL.C ........\STARTUP ........\STARTUP.A51 ........\startup.LST ........\STARTUP.M51 ........\startup.OBJ ........\VALUEDEF.H……