A game machines (swing machine) class of small procedures, 8051, KEIL compiler, for your reference. Expert on the free, because I am also a rookie. The game is a MP3 player, PWM modulation, coin after the motor starts, four solenoid valves control the pole.

MP3-PWM12月9日热气球\EEPROM.c
....................\EEPROM.LST
....................\EEPROM.OBJ
....................\mb004.h
....................\mb2003.h
....................\music.c
....................\music.h
....................\music.LST
....................\music.OBJ
....................\queue_error_0
....................\queue_error_3
....................\queue_error_4
....................\queue_error_5
....................\STARTUP.A51
....................\STARTUP.LST
....................\STARTUP.OBJ
....................\wtv
....................\wtv.c
....................\wtv.hex
....................\wtv.lnp
....................\wtv.LST
....................\wtv.M51
....................\wtv.OBJ
....................\wtv.Opt
....................\wtv.plg
....................\wtv.Uv2
....................\wtv_Opt.Bak
....................\说明.txt
MP3-PWM12月9日热气球

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