MP3-based STM32 implementation of a firmware code, can refer to

MP3_Player\add_to_Circle.bat
..........\CircleOS-3.72-Needed for MP3 Mono Playback[Unofficial]
..........\......................................................\BMPTOLCD
..........\......................................................\........\bmptolcd.exe
..........\......................................................\........\CircleOS_application
..........\......................................................\........\....................\add_to_Circle.bat
..........\......................................................\........\....................\Readme.txt
..........\......................................................\........\....................\rprj
..........\......................................................\........\....................\....\circle_api.h
..........\......................................................\........\....................\....\Circle_App.ld
..........\......................................................\........\....................\....\CircleOS_application.c
..........\......................................................\........\....................\....\CircleOS_application.rapp
..........\......................................................\........\....................\....\CircleOS_application.rprj
..........\......................................................\........\....................\....\example_bw_64_64.h
..........\......................................................\........\....................\....\objdebug
..........\......................................................\........\....................\....\........\add_to_Circle.bat
..........\......................................................\........\....................\....\........\CircleOS_application.elf
..........\......................................................\........\....................\....\........\CircleOS_application.elf.ld
..........\......................................................\........\....................\....\........\CircleOS_application.hex
..........\......................................................\........\....................\....\........\CircleOS_application.lst
..........\......................................................\........\....................\....\........\CircleOS_application.map
..........\......................................................\........\....................\....\........\CircleOS_application.o
..........\......................................................\........\....................\....\objrelease
..........\......................................................\........\....................\....\..........\add_to_Circle.bat
..........\......................................................\........\....................\....\..........\CircleOS_application.elf
..........\......................................................\........\....................\....\..........\CircleOS_application.elf.ld
..........\......................................................\........\....................\....\..........\CircleOS_application.hex
..........\......................................................\........\....................\....\..........\CircleOS_application.lst
..........\......................................................\........\....................\....\..........\CircleOS_application.map
..........\......................................................\........\....................\....\..........\CircleOS_application.o
..........\......................................................\........\....................\....\stm32f10x_conf.h
..........\......................................................\........\....................\src
..........\......................................................\........\....................\...\circle_api.h
..........\......................................................\........\....................\...\CircleOS_application.c
..........\......................................................\........\....................\...\CVS
..........\..........

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