U-Boot: Quick reference - Revision history

Urim at 12:00, 26 October 2017

2017-10-26T12:00:12Z

Grinberg: /* GPIO support */

2013-05-09T11:54:01Z

‎GPIO support

Grinberg at 14:04, 16 August 2012

2012-08-16T14:04:25Z

Mike at 07:45, 23 December 2009

2009-12-23T07:45:35Z

New page

This page provides quick U-Boot command reference. Please refer to the [http://www.denx.de/wiki/U-Boot/Documentation U-Boot project documentation] for detailed descriptions of the features listed below.
To get more information about a specific command, type {{cmd|help [command]}} in the U-Boot command line.

== Information commands ==
* {{cmd|bdinfo}} - print Board Info structure
* {{cmd|coninfo}} - print console devices and information
* {{cmd|flinfo}} - print FLASH memory information
* {{cmd|help}} - print online help

== Memory commands ==
* {{cmd|base}} - print or set address offset
* {{cmd|crc32}} - checksum calculation
* {{cmd|cmp}} - memory compare
* {{cmd|cp}} - memory copy
* {{cmd|md}} - memory display
* {{cmd|mm}} - memory modify (auto incrementing)
* {{cmd|mtest}} - simple RAM test
* {{cmd|mw}} - memory write (fill)
* {{cmd|nm}} - memory modify (constant address)
* {{cmd|loop}} - infinite loop on address range

== Flash memory commands ==
* {{cmd|cp}} - memory copy
* {{cmd|flinfo}} - print FLASH memory information
* {{cmd|erase}} - erase FLASH memory
* {{cmd|protect}} - enable or disable FLASH write protection

== Execution control commands ==
* {{cmd|autoscr}} - run script from memory
* {{cmd|bootm}} - boot application image from memory
* {{cmd|go}} - start application at address 'addr'
* {{cmd|loop}} - infinite loop on address range
* {{cmd|exit}} - exit script

== Download commands ==
* {{cmd|bootp}} - boot image via network using BOOTP/TFTP protocol
* {{cmd|dhcp}} - invoke DHCP client to obtain IP/boot params
* {{cmd|loadb}} - load binary file over serial line (kermit mode)
* {{cmd|loads}} - load S?Record file over serial line
* {{cmd|rarpboot}} - boot image via network using RARP/TFTP protocol
* {{cmd|tftpboot}} - boot image via network using TFTP protocol
* {{cmd|nfs}} - boot image via network using NFS protocol
* {{cmd|ping}} - send ICMP ECHO REQUEST to network host

== Environment variables commands ==
* {{cmd|printenv}} - print environment variables
* {{cmd|saveenv}} - save environment variables to persistent storage
* {{cmd|setenv}} - set environment variables
* {{cmd|run}} - run commands in an environment variable
* {{cmd|bootd}} - boot default, i.e., run 'bootcmd'

== File system support commands ==
* {{cmd|fatinfo}} - print information about a FAT file system
* {{cmd|fatload}} - load binary file from a FAT file system
* {{cmd|fatls}} - list files in a FAT file system directory (default /)
* {{cmd|fsinfo}} - print information about JFFS2 file system
* {{cmd|fsload}} - load binary file from a JFFS2 file system image
* {{cmd|ls}} - list files in a JFFS2 file system directory (default /)

== NAND flash support ==
* {{cmd|nand}} - NAND sub-system control
* {{cmd|nboot}} - boot from NAND device

== MMC support ==
* {{cmd|mmcinit}} - detect MMC card

== USB support ==
* {{cmd|usb}} - USB sub-system control
* {{cmd|usbboot}} - boot from USB device

== Bitmap support ==
* {{cmd|bmp}} - manipulate BMP image data

== Miscellaneous commands ==
* {{cmd|echo}} - echo arguments to console
* {{cmd|reset}} - Perform RESET of the CPU
* {{cmd|sleep}} - delay execution for some time
* {{cmd|version}} - print monitor version
* {{cmd|test}} - minimal test, like /bin/bash
* {{cmd|?}} - alias for {{cmd|help}}

[[Category:U-Boot|Quick reference]]

@@ Line 74: / Line 74: @@
 * {{cmd|nandecc}} -  switch OMAP3 NAND ECC calculation algorithm
 * {{cmd|nboot}} -  boot from NAND device
 == Partition commands ==

@@ Line 99: / Line 99: @@
 == Bitmap support ==
 * {{cmd|bmp}} -  manipulate BMP image data
 == Miscellaneous commands ==

@@ Line 1: / Line 1: @@
 This page provides quick U-Boot command reference. Please refer to the [http://www.denx.de/wiki/U-Boot/Documentation U-Boot project documentation] for detailed descriptions of the features listed below.
 To get more information about a specific command, type {{cmd|help [command]}} in the U-Boot command line.
 == Information commands ==
@@ Line 25: / Line 26: @@
 * {{cmd|erase}} -  erase FLASH memory
 * {{cmd|protect}} -  enable or disable FLASH write protection
 == Execution control commands ==
 * {{cmd|autoscr}} -  run script from memory
 * {{cmd|bootm}} -  boot application image from memory
 * {{cmd|go}} -  start application at address 'addr'
@@ Line 37: / Line 43: @@
 * {{cmd|dhcp}} -  invoke DHCP client to obtain IP/boot params
 * {{cmd|loadb}} -  load binary file over serial line (kermit mode)
 * {{cmd|loads}} -  load S?Record file over serial line
 * {{cmd|rarpboot}} -  boot image via network using RARP/TFTP protocol
@@ Line 44: / Line 51: @@
 == Environment variables commands ==
 * {{cmd|printenv}} -  print environment variables
 * {{cmd|saveenv}} -  save environment variables to persistent storage
@@ Line 49: / Line 58: @@
 * {{cmd|run}} -  run commands in an environment variable
 * {{cmd|bootd}} -  boot default, i.e., run 'bootcmd'
 == File system support commands ==
@@ Line 54: / Line 64: @@
 * {{cmd|fatload}} -  load binary file from a FAT file system
 * {{cmd|fatls}} -  list files in a FAT file system directory (default /)
 * {{cmd|fsinfo}} -  print information about JFFS2 file system
 * {{cmd|fsload}} -  load binary file from a JFFS2 file system image
@@ Line 60: / Line 72: @@
 == NAND flash support ==
 * {{cmd|nand}} -  NAND sub-system control
 * {{cmd|nboot}} -  boot from NAND device
 == MMC support ==
-* {{cmd|mmcinit}} -  detect MMC card
+* {{cmd|mmc}} -  MMC sub system
 == USB support ==
 * {{cmd|usb}} -  USB sub-system control
 * {{cmd|usbboot}} -  boot from USB device
 == Bitmap support ==
@@ Line 79: / Line 107: @@
 * {{cmd|test}} -  minimal test, like /bin/bash
 * {{cmd|?}} - alias for {{cmd|help}}
+* {{cmd|showvar}} - print local hushshell variables
 [[Category:U-Boot|Quick reference]]