* SiM3 SDK * USB stack base on LUFA * FAT 12/16/32 support base on Fatfs * SD card driver support. * MCU platform is SiM3U167 Arm Cortex M3 core. Status ---------------------------------- * USB CDC class has been tested and works well. * Three VCP support added * Other classes need to be tested in future. * SD card SPI driver was done, not implement DMA support yet. * FATFS read/write file and directory list work OK.