SDFileSystem which uses SimpleDMA to efficiently write to the SD card, while other Threads in the RTOS continue running

Dependencies:   FATFileSystem RTOS_SPI

Dependents:   SDFileSystem_RTOS_HelloWorld RdGasUseMonitor keiki2017 keiki2018

Fork of SDFileSystem by mbed official

shortlog@1a4ffe455d3c: not found in manifest