On 15/11/2016 11:01, 黄喜 wrote: > Chris, > Is there any docs about use the jffs2 filesystem? Not that I know of. I suggest you take a look at the testsuite/fs_tests for examples of using the JFFS2. > How to > write the device driver for the flash? Writing a flash driver depends on the type of flash and how it is connected to the processor. Chris