51 control STA013 to realize MP3 audio decoding, realize the initialization of STA013, volume adjustment, mute, sound quality setting, channel control. Meanwhile, the display of LCD is controlled by RS232 serial port. The code was debugged and passed.

STA
...\CONFIG.H
...\E2ROM.C
...\E2ROM.H
...\I2C.C
...\I2C.H
...\LCD.C
...\LCD.H
...\MAIN.C
...\MP3DATA.C
...\MP3DATA.H
...\SERIAL.C
...\SERIAL.H
...\sta.c
...\sta.h
...\TIME.C
...\TIME.H

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