With STC12C5A60S2 MCU can directly read and play wav file in the SD card. Due to the limited speed of 51 single-chip, memory is very small, the program uses double buffering, so that sounds very smooth. The peripheral circuits dac0832+ lm324 analog signal conversion circuit is simple, here is not to the circuit diagram.

41SD鍗?
41SD鍗?36KEILLCD
................\GUI_Basic.H
................\GUI_Basic.c
................\GUI_Basic.lst
................\GUI_Basic.obj
................\GUI_Config.H
................\GUI_Type.H
................\KEILLCD
................\KEILLCD.M51
................\KEILLCD.ORC
................\KEILLCD.Uv2.bak
................\KEILLCD.hex
................\KEILLCD.lnp
................\KEILLCD.opt.bak
................\KEILLCD.plg
................\KEILLCD.uvopt
................\KEILLCD.uvproj
................\KEILLCD_Opt.Bak
................\KEILLCD_Uv2.Bak
................\LCD.H
................\LCD.lst
................\LCD.obj
................\MyTypeDef.h
................\STARTUP.A51
................\STARTUP.LST
................\STARTUP.OBJ
................\Source
................\......\LCD.H
................\......\LCD.c
................\......\LYGUI
................\......\.....\GUI_Basic.H
................\......\.....\GUI_Basic.c
................\......\.....\GUI_Config.H
................\......\.....\GUI_Type.H
................\......\.....\fontlib.h
................\......\MyTypeDef.h
................\......\main.c
................\fontlib.h
................\main.lst
................\main.obj
................\sd.c
................\sd.h
41SD鍗?9325TP.h
41SD鍗?sd
41SD鍗?sd.LST
41SD鍗?sd.M51
41SD鍗?sd.OBJ
41SD鍗?sd.Uv2.bak
41SD鍗?sd.c
41SD鍗?sd.h
41SD鍗?sd.hex
41SD鍗?sd.lnp
41SD鍗?sd.opt.bak
41SD鍗?sd.plg
41SD鍗?sd.uvopt
41SD鍗?sd.uvproj
41SD鍗?sd_Opt.Bak
41SD鍗?sd_Uv2.Bak
41SD鍗?sd_uvopt.bak
41SD鍗?sd_uvproj.bak

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