mp3 ecpand hdd drive! 51 source ,mcu is atmel 89c51

Atmel
.....\snd1c-demo-hdd-0_2_0
.....\....................\demo
.....\....................\....\demo_hdd
.....\....................\....\........\bin
.....\....................\....\........\...\emul.bat
.....\....................\....\........\...\player.hex
.....\....................\....\........\...\player.Uv2
.....\....................\....\........\CHANGES.txt
.....\....................\....\........\doc
.....\....................\....\........\...\snd1-demo-manual-2_0_x.pdf
.....\....................\....\........\INSTALL.txt
.....\....................\....\........\LICENSE.txt
.....\....................\....\........\NEWS.txt
.....\....................\....\........\obj
.....\....................\....\........\...\obj.txt
.....\....................\....\........\README.txt
.....\....................\....\........\src
.....\....................\....\........\...\clock
.....\....................\....\........\...\.....\clock.c
.....\....................\....\........\...\.....\clock.h
.....\....................\....\........\...\display
.....\....................\....\........\...\.......\disp.c
.....\....................\....\........\...\.......\disp.h
.....\....................\....\........\...\.......\disp_task.c
.....\....................\....\........\...\.......\disp_task.h
.....\....................\....\........\...\file
.....\....................\....\........\...\....\fat.c
.....\....................\....\........\...\....\fat.h
.....\....................\....\........\...\....\file.c
.....\....................\....\........\...\....\file.h
.....\....................\....\........\...\....\wav.h
.....\....................\....\........\...\kbd
.....\....................\....\........\...\...\kbd_task.c
.....\....................\....\........\...\...\kbd_task.h
.....\....................\....\........\...\mass
.....\....................\....\........\...\....\usb_task.c
.....\....................\....\........\...\....\usb_task.h
.....\....................\....\........\...\mem
.....\....................\....\........\...\...\hard.h
.....\....................\....\........\...\...\hard_.h
.....\....................\....\........\...\...\mem_task.c
.....\....................\....\........\...\...\mem_task.h
.....\....................\....\........\...\mode
.....\....................\....\........\...\....\mode_task.c
.....\....................\....\........\...\....\mode_task.h
.....\....................\....\........\...\song
.....\....................\....\........\...\....\song_drv.c
.....\....................\....\........\...\....\song_drv.h
.....\....................\....\........\...\....\song_task.c
.....\....................\....\........\...\....\song_task.h
.....\....................\....\........\...\system
.....\....................\....\........\...\......\config.h
.....\....................\....\........\...\......\isp.a51
.....\....................\....\........\...\......\main.c
.....\....................\....\........\...\......\scheduler.c
.....\....................\....\........\...\......\scheduler.h
.....\....................\....\........\...\......\startup.a51
.....\....................\....\........\...\......\variable.c
.....\....................\....\........\...\tool
.....\....................\....\........\...\....\tool_task.c
.....\....................\....\........\...\....\tool_task.h
.....\....................\....\........\...\voice
.....\....................\....\........\...\.....\voice_drv.c
.....\....................\....\........\...\.....\voice_drv.h
.....\....................\....\........\...\.....\voice_task.c
.....\....................\....\........\...\.....\voice_task.h
.....\....................\....\........\tst
.....\....................\....\........\...\PLAYER.INI
.....\....................\lib
.....\....................\...\adc
.....\....................\...\...\adc_drv.c
.....\....................\...\...\adc_drv.h
.....\....................\...\aud
.....\....................\...\...\aud_drv.c
.....\....................\...\...\aud_drv.h
.....\.......

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