http://www.coocox.com/index.html
CooCox Colink is a small ARM Cortex M3 JTAG hardware debugging probe. It integrates seamlessly into IAR Embedded Workbench, Keil RealView MDK, CooCox CoDebugger and CooCox CoFlash.
CooCox CoOS is an embedded real-time multi-task OS specially for ARM Cortex M3
CooCox CoDebugger is a debugger which was designed based on Eclipse platform's sub-projects DSDP (Device Software Development Platform). It integrates the leanest graphical user interface and the most frequently used debugging tools. CooCox CoDebugger supports debugging a CoBuilder or CDT project or an ELF file
CooCox CoFlash is a Cortex M3 Flash Programmer which supports both GUI and command line user interface. It integrates the frequently used functions of programming and erasing full chip or sectors. CooCox CoFlash supports programming a .bin or .elf file.
примеры и т.д. (MP3 на Atmel пример есть) http://www.coocox.com/EXAMPLE/SAM3U_MP3_CoOS.htm
не понял это все на шару?