Software Libraries to Support Tiny MCUs
Support page for TCP/IP Stack, File System (similar to FAT, but simplified), Sound playback (ADPCM/PCM), and Flash File system. Primarily R8C and M16C Tiny devices are supported.
The link address is: http://america.renesas.com/fmwk.jsp?cnt=/tiny_app_softlib_tools_product_landing.jsp&fp=/products/tools/middleware_and_drivers/tiny_soft&site=i

