uboot MMC read/write command usage

Category: Embedded Linux 2012-02-14 17:33 1170 people reading reviews (0) Favorite reports

MMC read is used to read MMC content to memory,

MMC write is used to write memory contents into the MMC

Specific usage,

MMC read <device num> addr blk# cnt [partition]

MMC write <device num> addr blk# cnt [partition]

MMC list

Device num is the unit number of the MMC and can be queried through the MMC list

Addr is the memory address

blk# is the block number within the MMC

Number of CNT blocks

Examples of Use:

MMC write 2 0x90000000 0x600 0x10

Start the memory 0x90000000, the length is 16x512 size data, writes to the 2nd MMC device block offset position is 0x600 place

MMC read 2 0x90000000 0x600 0x10

Offset the second MMC device block to 0x600 at the beginning of the 16x512 size, read out to memory 0x90000000