file_write

static errno_t file_write(
　　aal_device_t * device - file device, data will be wrote onto
　　void * buff - buffer, data stored in
　　blk_t block - start position for writing
　　count_t count - number of blocks to be write
)

device

file device, data will be wrote onto

buff

buffer, data stored in

block

start position for writing

count

number of blocks to be write