Artesyn COMX-P2020 BSP User Guide (July 2014) - Manual (Page 62)

U-boot Deployment
COMX-P2020 BSP User Guide (6806800L84B) 62
sf write addr offset len - write `len' bytes from memory
at `addr' to flash at `offset'
sf erase offset len - erase `len' bytes from `offset'
5.4.10 SD Card
The U-boot provides the standard command "mmc" to check, read, erase and write SD Card.
This part is not included in this document.
=> help mmc
mmc - MMC sub system
Usage:
mmc read <device num> addr blk# cnt
mmc write <device num> addr blk# cnt
mmc rescan <device num>
mmc list - lists available devices
5.4.11 USB
COMX-P2020 implements a dual-role (DR) USB module. This module is connected to
USB2514i which can provide 4 downstream ports. U-boot can scan the USB devices which
connected with USB2514i. If the device is a storage device, then U-boot can read and write the
block of the device.
The U-boot provides standard command: usb to find and read USB storage devices. This part is
not included in this document.
=> help usb
usb - USB sub-system
Usage:
usb reset - reset (rescan) USB controller
usb stop [f] - stop USB [f]=force stop