COM iMX25 Bootloader U-Boot: Difference between revisions

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== FAQ ==
== FAQ ==
== Downloads ==
:'''Q: Entering Bootloader console is not possible?'''
* [[media:U-boot (V1.11.2.0).zip|Download U-Boot binary (v1.11.2.0)]]
:'''A:''' Up to U-Boot version V1.14.0.0 it was possible to enter the bootloader console by pressing any key (e.g. "Enter"). Since version V1.15.0.0 it is not possible to enter to the bootloader console by pressing a various key (e.g. "Enter") anymore. You have to send "DEL" (ASCII 0x7F) to the device. We recommend you to use the terminal program '''teraterm''' if you are working on windows and to use '''kermit''' or '''minicom''' if you use linux on your pc.  
* [[media:settings_DataImage_4_3inch_FG040360DSSWBG03.zip|Settings DataImage 4,3" Display (FG040360DSSWBG03) (for U-Boot Version v1.7.0.0)]]
::You can configure teraterm to send "DEL" when the delete key or the backspace key is pressed by clicking through the menu to <code> Setup->Keyboard-Setup </code> and enable the required checkbox.
* [[media:settings_PrimeView_7inch_PM070WT3.zip|Settings PrimeView 7" Display (PM070WT3) (for U-Boot Version v1.7.0.0)]]
* [[media:DHupdate_example.zip|DHupdate.ini file example (for U-Boot Version v1.10.0.0 or higher)]]


== Console commands ==
::Kermit is sending a "DEL" if you hit the backspace key.
=== NAND Flash ===


:'''Nand Flash Read'''
::Minicom is able to send "DEL" when you hit the backspace key if you configure minicom to do that within a terminal window:
:::{| class="wikitable"
|<code> $ minicom -s </code>
|-
|navigate to <code> Screen and keyboard </code>
|-
|press "B"
|}


:''nand read <SDRAM address> <NAND Flash address> <Bytes>''


:Example: nand read 80000000 400000 b40000
:'''Q: Update from U-Boot V1.11.2.0 to V1.14.0.0 or higher?'''
:'''A:''' Follow the six steps:
:#Copy new U-Boot binary to MicroSD Card
:#Insert MicroSD Card to core module and connect DHCOM UART1 to host PC
:#Start core module and enter bootloader console by pressing "del" during start
:#Call the command "nand erase c0000 bffff" and press enter
:#Call the command "update bootloader" and press enter
:#Restart the core module. The bootloader is updated now.


:Description: Copies 11,25MByte from NAND Flash address 0x40_0000 to SDRAM address 0x8000_0000
:'''Q: Update from U-Boot V1.5.0.0 or V1.7.0.0 to V1.14.0.0 or higher?'''
:'''A:''' Follow the sixsteps:
:#Copy new U-Boot binary, splash bitmap, new [[COM iMX25 Bootloader U-Boot#DHCOM settings|settings]] binary and [[COM iMX25 Bootloader U-Boot#DHupdate.ini file|DHupdate.ini]] file to MicroSD Card
:#:DHupdate.ini file [update] content:
:#::splash *.bmp
:#::settings *.bin
:#Insert MicroSD Card to core module and connect DHCOM UART1 to host PC
:#Start core module and enter bootloader console by pressing "del" during start
:#Call the command "nand erase 80000 3ffff" and press enter
:#Call the command "update bootloader u-boot.bin" and press enter
:#After Update restart the core module and wait until bootloader has updateted splashimage and settings block (to prevent update repetition delete the update files from MicroSD Card after a successful update)
::Note: It is neccessary to flash the OS image again, if OS image was already flashed before bootloader update.


:'''Nand Flash Erase'''
== Changelog ==
:[[COM iMX25 Bootloader Changelog|Changelog Files]]


:''nand erase <Block base address> <Bytes>''
== Downloads ==
 
Please have a look at the[[COM_iMX25-D2#Downloads| iMX25 Downloads]] section.
:Example: nand erase 400000 40000
 
:Description: Deletes NAND Flash content from address 0x40_0000 to 0x43_FFFF
 
:Note: The Bytes information needs to be block size aligned!
 
:'''Nand Flash Write'''
 
:''nand write <SDRAM address> <NAND Flash address> <Bytes>''
 
:Example: nand write 80000000 400000 b40000
 
:Description: Cpoies 11,25MByte from SDRAM address 0x8000_0000 to NAND Flash address 0x40_0000
 
:Note: The Bytes information needs to be page size aligned!
 
:'''Show bad NAND Flash blocks'''
 
:''nand bad''
 
:Description: Shows the bad NAND Flash blocks.
 
:'''Show NAND FLash content'''
 
:''nand dump <NAND Flash address>''
 
:Example: nand dump 400000
 
:Description: Shows the content of the specified NAND Flash block
 
=== LCD contoller ===
 
:'''Show LCD controller settings'''
 
:''lcdinfo''
 
:Example: 
  Display Resolution: 800 x 480 pixels
  Display Type:      Active Color Display
  Pixel Clock:        22 MHz
  Bits per Pixel:    16 Bits/Pixel
  Pixel Polarity:    Active High
  VSYNC Polarity:    Active Low
  HSYNC Polarity:    Active Low
  Clock Polarity:    Pos. Edge
  Output En Polarity: Active High
  HSYNC Puls Width:  64 Clock Cycles
  HSYNC Back Porch:  86 Clock Cycles
  HSYNC Front Porch:  42 Clock Cycles
  VSYNC Puls Width:  2 Line Cycles
  VSYNC Back Porch:  33 Line Cycles
  VSYNC Front Porch:  10 Line Cycles
 
=== GPIO's ===
 
:'''Show DHCOM GPIO settings'''
 
:''gpioinfo''
 
:Example:
  GPIO_A: Direction = Input
          State    = 0
  GPIO_B: Direction = Input
          State    = 0
  GPIO_C: Direction = Input
          State    = 0
  GPIO_D: Direction = Input
          State    = 0
  GPIO_E: Direction = Input
          State    = 1
  GPIO_F: Direction = Input
          State    = 1
  GPIO_G: Direction = Output
          State    = 1
  GPIO_H: Direction = Input
          State    = 1
  GPIO_I: Direction = Input
          State    = 1
  GPIO_J: Direction = Input
          State    = 1
  GPIO_K: Direction = Input
          State    = 0
 
=== SD/MMC Card ===
 
:'''Switch between MicroSD and SD Slot'''
 
:''mmcswitch <Slot number>''
 
:Example: mmcswitch 2
 
:Description: Switch between SD/MMC Slots: 1 --> SD/MMC Slot, 2 --> MicroSD Slot
 
:'''Initialize SD/MMC Card'''
 
:''mmcinit''
 
:Description: Initialize new inserted SD Card
 
=== Filesystem ===
 
:'''Show Filesystem information'''
 
:''fatinfo <interface> <device>''
 
:Example: fatinfo mmc 1
 
Interface: MMC
  Device 1: Vendor: Man 094150 Snr 266e068c Rev: 1.0 Prod: AF UD
            Type: Removable Hard Disk
            Capacity: 121.2 MB = 0.1 GB (248320 x 512)
  Partition 1: Filesystem: FAT16 "NO NAME    "
 
:'''List files'''
 
:''fatls <interface> <device> <directory>''
 
:Example 1: fatls mmc 1
 
:Example 2: fatls mmc 1 /folder
 
:'''Load Files from SD Card to SDRAM'''
 
:''fatload <interface> <device> <SDRAM address> <directory+filename>''
 
:Example 1: fatload mmc 1 80100000 nk.gz
 
:Example 2: fatload mmc 1 80100000 /folder/nk.gz
 
=== Ethernet ===
 
:'''Load File via TFTP to SDRAM'''
 
:''tftp <SDRAM address> <directory+filename>''
 
:Example: tftp 80100000 nk.gz
 
:Example TFTP Server: "Winagents TFTP Server Manager"
 
:Note: For TFTP download it is necessary to config the ENV variables "ipaddr" and "serverip"
 
:'''Ping'''
 
:''ping <IP address>''
 
:Example: ping 192.168.55.32
 
:'''Read PHY register via MII interface'''
 
:''mii dump <PHY address> <PHY register>''
 
:Example: mii dump 1 0
 
:Description: Shows PHY control register content.
 
=== Environment ===
 
:'''Show ENV variables'''
 
:''printenv''
 
bootdelay=0
baudrate=38400
ipaddr=192.168.55.230
serverip=192.168.55.36
gatewayip=192.168.55.36
netmask=255.255.255.0
frias=5
kernel=uImage
bootargs=console=ttymxc0,115200 root=/dev/mmcblk0p2
nandbootwince=update;bootwince 00200000
splashimage=0x000c0000
save_ENV_to_flash=setenv ENVinFlash 1; saveenv
ENVinFlash=1
ethaddr=00:04:a3:34:b6:0d
ethact=FEC0
winceimagetype=nk.gz
winceimagesize=00ba55ee
loadaddr=00200000
bootcmd=run nandbootwince
filesize=212050
Environment size: 449/262140 bytes
 
:'''Set ENV variables'''
 
:''setenv <ENV name> <ENV value>''
 
:Example: setenv ipaddr 192.168.55.2
 
:Note: If you need to edit "bootcmd" it is necessary to insert ";" between the unique commands. You can enter ";" at the command line with "\;".
 
:'''Save ENV variables'''
 
:''saveenv''
 
=== Update ===
 
:Note: See also Bootloader subitem Flash Update.
 
:'''iMX25_update.bmp file'''
 
:''update''
 
:Description: Starts Flash update with "iMX25_update.bmp" file.
 
:'''Command line'''
 
:''update <type> [filename]''
 
:Type:
 
:wince = WinCE image update (default file names nk.gz or nk.bin) + ENV update
 
:linux = Linux image update (default file name uImage) + ENV update (default script file name uImage.env)
 
:flash = Complete flash image update
 
:bootloader = Bootloader update (default file name u-boot.bin)
 
:splash = Bootbitmap update (default file name splash.bmp)
 
:settings = Settings block update (default file name settings.bin)
 
=== I2C ===
 
:'''List available devices'''
 
:''i2c probe''
 
Valid chip addresses: 00 57 6F
0x5F = DHCOM i.MX25 Core Module EEPROM
0x6F = DHCOM i.MX25 Core Module Real Time Clock
 
:'''Read'''
 
:''i2c md <I2C address> <I2C register> <Bytes>''
 
:Example: i2c md 57 0 10
 
:Description: Reads 10 Bytes from the offset 0.


:'''Write'''
== Enter Bootloader Console ==
:#Connect DHCOM UART1 via null modem cable to the Host PC
:#Start terminal program (recommended terminal program: [http://www.heise.de/download/teraterm-pro.html TeraTerm]) on the Host PC with the following settings:
:#:Baud rate: 38400
:#:Data: 8 bit
:#:Parity: none
:#:Stop bits: 1 bit
:#:Flow control: none
:#Press "del" on the Host PC during Core Module system start to enter bootloader console


:''i2c mw <I2C address> <I2C register> <Value> <Bytes>''
==U-boot console commands==
 
{{TemplateUbootCommands}}
:Example: i2c mw 57 0 aa 5
 
:Description: Writes 0xaa to 5 Bytes from the offset 0.
 
=== OS Boot ===
 
:'''WinCE'''
 
:''bootwince <Image address> [debug]''
 
:Example: bootwince 200000
 
:Description: The address 0x20_0000 specifies NAND Flash image address. The image is loaded from NAND flash to SDRAM. Next to that u-boot starts WinCE. The "debug" option make sure that the image wouldn't be started after uncompressing.
 
:Note: The Image address could also be an SDRAM address. But it is necessary to copy the Image (via tftp or nand flash commands) to the SDRAM before calling "bootwince".
 
:''bootwince tftp''
 
:Note: The ENV variables "loadaddr" and "bootfile" needs to be set before calling the command. For *.gz image types the "loadaddr" should be set to 0x8290_0000 and for *.bin images the address should be 0x8100_0000.


==NAND Flash allocation==
:'''Linux'''
:'''Linux'''
 
:{| class="wikitable"
:''bootm <Kernel address> [arg]''
|'''Bootloader'''
 
|0x0000_0000 - 0x000B_FFFF
:Note: When booting a Linux kernel,‘arg' can be the address of an initrd image.
 
=== Unzip ===
 
:''unzip <source address> <destination address>''
 
:Example: unzip 82900000 80100000
 
:Note: The unzip command is supporting the gzip file format.
 
=== Bitmap ===
 
:'''Information'''
 
:''bmp info <Bitmap address>''
 
Image size    : 800 x 480
Bits per pixel: 8
Compression  : 0
 
:'''Display'''
 
:'' bmp display <Bitmap SDRAM address> [x y]''
 
=== Memory ===
 
:'''Display'''
 
:''md[.b, .w, .l] <address> [count]''
 
:Example: md.b 80100000 100
 
:'''Write'''
 
:''mw[.b, .w, .l] <address> <value> [count]''
 
:Example: mw.b 80100000 aa 100
 
:Description: Writes the value 0xaa to the next 0x100 bytes from the address 0x8010_0000.
 
:'''Copy'''
 
:''cp[.b, .w, .l] <source> <destination> <count>''
 
== Hardware settings ==
The Hardware settings could be configured via the DHCOM settings file in flash memory. The file contains the following settings:
:[[Image:DHCOM Settings Block.png|1000px]]
 
(Supported from U-Boot v1.11.0.1 or higher)
 
'''Settings Block description:'''
{|class="wikitable"
|-
! Settings Name: !! Description: !! Unit:
|-
| VALIDATION_ID ||„DH“ ||
|-
| DISPLAY_ID|| unique ID of Display ||
|-
| LENGTH || Length of the settings block ||
|-
| X_RESOLUTION || Display x resolution || pixel
|-
| Y_RESOLUTION || Display y resolution || pixel
|-
| PIXEL_CLOCK || Pixel clock || kHz
|-
| LCD_CONFIG_FLAGS || LCD Configuration Register || see description
|-
| HSW || Horizontal synchronization pulse width || pixel clocks
|-
| VSW || Vertical synchronisation pulse width || line clocks
|-
| HFP || Horizontal front porch || pixel clocks
|-
| HBP || Horizontal back porch || pixel clocks
|-
|-
| VFP || Vertical front porch || line clocks
|'''Internal'''
|0x000C_0000 - 0x0027_FFFF
|-
|-
| VBP || Vertical back porch || line clocks
|'''Linux Kernel'''
|0x0028_0000 - 0x005F_FFFF
|-
|-
| DATALINES || count of datalines || number of datalines
|'''Flashdisk'''
|-
|0x0060_0000 - ...
| ACB || AC Bias frequency ||
|-
| ACBI || AC Bias transitions per interrupt ||
|-
| || ||
|-
| GPIO_DIR || DHCOM GPIO default direction register || see description
|-
| GPIO_STATE || DHCOM GPIO default state register || see description
|-
| HW_CONFIG_FLAGS || Hardware Configuration Register || see description
|}
|}


'''LCD_CONFIG_FLAGS description:'''
:'''WinCE'''
{|class="wikitable"
:{| class="wikitable"  
|-
|'''Bootloader'''
! Settings Name: !! Description: !! Unit:
|0x0000_0000 - 0x000B_FFFF
|-
|IVS || Inverted Vertical Sync Pulse || 0 active high / 1 active low
|-
|IHS || Inverted Horizontal Sync || 0 active high / 1 active low
|-
|IPC || Inverted Pixel Clock || 0 Data is driven on rising edge / 1 Data is driven on falling edge
|-
|IOE || Inverted Output Enable || 0 active high / 1 active low
|-
|IDATA ||Inverted Data || 0 active high / 1 active low
|-
|ACT_PAS || Active or passiv matrix display || 0 passiv / 1active
|-
|PWM_POL || PWM polarity || 0 low state backlight off and high state backlight on / 1 low state backlight on and high state backlight off
|-
|BL_EN_GPIO || Backlight enable GPIO number || 0 no backlight enable GPIO / 1 DHCOM GPIO_A / 2 DHCOM GPIO_B / … / 9 = DHCOM GPIO_I
|-
|IBL || Inverted Backlight Enable || 0 active high / 1 active low
|}
 
'''GPIO_DIR description:'''
{|class="wikitable"
|-
! Settings Name: !! Description: !! Unit:
|-
|GPIO_A_DIR || DHCOM GPIO_A direction || 1 input / 0 output
|-
|-
|GPIO_B_DIR || DHCOM GPIO_B direction || 1 input / 0 output
|'''Internal'''
|0x000C_0000 - 0x0027_FFFF
|-
|-
|… || ||
|'''WinCE Image'''
|-
|0x0028_0000 - 0x01FF_FFFF
|GPIO_I_DIR || DHCOM GPIO_I direction || 1 input / 0 output
|-
|-
|'''Flashdisk'''
|0x0200_0000 - ...
|}
|}


'''GPIO_STATE description:'''
==[[DHCOM Flash Update|How to do Updates]]==
{|class="wikitable"
|-
! Settings Name: !! Description: !! Unit:
|-
|GPIO_A_STATE || DHCOM GPIO_A default state if dir = output || 1 high / 0 low
|-
|GPIO_B_STATE || DHCOM GPIO_B default state if dir = output || 1 high / 0 low
|-
|… || ||
|-
|GPIO_I_STATE || DHCOM GPIO_I default state if dir = output || 1 high / 0 low
|-
|}
 
'''HW_CONFIG_FLAGS description:'''
{|class="wikitable"
|-
! Settings Name: !! Description: !! Unit:
|-
|SILENT_MODE || Disable Bootloader messages on FFUART || 0 enabled FFUART outputs / 1 disabled FFUART outputs
|-
|UPDATE_DEV || Configures auto update storage devices || 0b000000 All Update Medias disabled
0bxxxxx1 Update via MicroSD Slot
 
0bxxxx1x Update via SD/MMC Slot
 
0bxxx1xx Update via USB Host 1
 
0bxx1xxx Update via USB OTG
 
0bx1xxxx Update via USB Host 2
 
0b1xxxxx Update via Ethernet
|-
|LCD_MODE || Enable Bootloader messages on LCD Display || 1 enabled / 1 disabled
|-
|}
 
== Flash Update ==
The follwing updates are possible with the Bootloader:
# Bootloader
# Splashimage
# Settings
# Linux image
# WinCE image
 
=== Overview ===
:[[Image:Flash Update Overview.png|1020px]]
 
=== Modes ===
==== Automatically Update ====
:(Supported from U-Boot v1.10.0.0 or higher)
:Is called after the start of the bootloader. The functionality tries to update the flash content '''via the DHupdate.ini file''' (Please have a look at [[COM iMX25 Bootloader U-Boot#DHupdate.ini file|DHupdate.ini file]]). The update mechanism is searching for the update files on the specified storage devices. The update devices must be defined at the settings block (Please have a look at [[COM iMX25 Bootloader U-Boot#Hardware settings|Hardware settings]]). With the DHupdate.ini file you have the possibility to run more then one updates, e.g. OS image and settings block.
 
==== Command line Update ====
#Instruction: "update"
#:(Supported from U-Boot v1.10.0.0 or higher)
#:The functionality tries to update the flash content '''via the DHupdate.ini file'''. In contrast to Automatically Update the update mechanism is searching on every available storage device for the update files.
#Instruction: "update <type> [filename]"
#:(Supported from U-Boot v1.5.0.0 or higher)
#:The functionality '''doesn't use the DHupdate.ini file'''. It allows only one update and the update mechanism is searching on every available storage device for the update files. With the <type> parameter you have to specify the update type.
#:The <type> parameter could be specified as follows:
#::* wince = WinCE image update + ENV update
#::* linux = Linux image update + ENV update
#:::Note: If you run linux update, u-boot searches also for an update ENV script. This script modifies the ENV for Linux. The name of the script must be the image name with the ending .env. You can also run an update without an script file. In this case u-boot only updates the image and the ENV remains unchanged.
#::* bootloader = Bootloader update
#:::Note: The ENV in Flash memory is created on the first start of u-boot. If you run a bootloader update and the ENV at the new bootloader has changed, the ENV in Flash memory remains unchanged with the bootloader update. But you could delete the ENV block in flash memory before the update, then u-boot will create the new default ENV at the next start after the bootloader update.
#::* splash = Bootbitmap update
#::* settings = Settings block update
#:::Note: Please have a look at [[COM iMX25 Bootloader U-Boot#Hardware settings|Hardware settings]].
#:The [filename] parameter could be used to specify a non default filename. The default filenames are:
#::* wince = default file names nk.gz or nk.bin
#::* linux = default file name uImage + default script file name uImage.env
#::* bootloader = default file name u-boot.bin
#::* splash = default file name splash.bmp
#::* settings = default file name settings.bin
 
=== DHupdate.ini file ===
:The DHupdate.ini file is a text file, which describes the user specified update mechanism.
 
:[[Image:DHupdate_file_layout.png|700px]]
 
 
:For DHupdate.ini File Example, please have a look at the Please have a look at [[COM iMX25 Bootloader U-Boot#Downloads|Download area]].
:'''Note:''' It is necessary to use UNIX End Of Line conversion!!!


:Update progress LED description:
==[[DHCOM Settings|How to create a settings.bin file]]==
::The LED GPIO is activated as soon as update has started. This takes roughly 6 - 8 seconds. If the update was finished without an error, the LED GPIO is deactivated. If an error occurs during the update the LED GPIO begins blinking.
::LED error code:
::1 LED blinking interval = DHupdate.ini File error (Wrong file content or no valid file found)
::2 LED blinking interval = Necessary File for Update not found
::3 LED blinking interval = Flash write or erase error
::4 LED blinking interval = Wrong OS Image type (e.g. no WinCE *.gz or *.bin file)
::5 LED blinking interval = Specified file not valid (e.g. linux *.env file)

Latest revision as of 14:36, 24 July 2015

FAQ

Q: Entering Bootloader console is not possible?
A: Up to U-Boot version V1.14.0.0 it was possible to enter the bootloader console by pressing any key (e.g. "Enter"). Since version V1.15.0.0 it is not possible to enter to the bootloader console by pressing a various key (e.g. "Enter") anymore. You have to send "DEL" (ASCII 0x7F) to the device. We recommend you to use the terminal program teraterm if you are working on windows and to use kermit or minicom if you use linux on your pc.
You can configure teraterm to send "DEL" when the delete key or the backspace key is pressed by clicking through the menu to Setup->Keyboard-Setup and enable the required checkbox.
Kermit is sending a "DEL" if you hit the backspace key.
Minicom is able to send "DEL" when you hit the backspace key if you configure minicom to do that within a terminal window:
$ minicom -s
navigate to Screen and keyboard
press "B"


Q: Update from U-Boot V1.11.2.0 to V1.14.0.0 or higher?
A: Follow the six steps:
  1. Copy new U-Boot binary to MicroSD Card
  2. Insert MicroSD Card to core module and connect DHCOM UART1 to host PC
  3. Start core module and enter bootloader console by pressing "del" during start
  4. Call the command "nand erase c0000 bffff" and press enter
  5. Call the command "update bootloader" and press enter
  6. Restart the core module. The bootloader is updated now.
Q: Update from U-Boot V1.5.0.0 or V1.7.0.0 to V1.14.0.0 or higher?
A: Follow the sixsteps:
  1. Copy new U-Boot binary, splash bitmap, new settings binary and DHupdate.ini file to MicroSD Card
    DHupdate.ini file [update] content:
    splash *.bmp
    settings *.bin
  2. Insert MicroSD Card to core module and connect DHCOM UART1 to host PC
  3. Start core module and enter bootloader console by pressing "del" during start
  4. Call the command "nand erase 80000 3ffff" and press enter
  5. Call the command "update bootloader u-boot.bin" and press enter
  6. After Update restart the core module and wait until bootloader has updateted splashimage and settings block (to prevent update repetition delete the update files from MicroSD Card after a successful update)
Note: It is neccessary to flash the OS image again, if OS image was already flashed before bootloader update.

Changelog

Changelog Files

Downloads

Please have a look at the iMX25 Downloads section.

Enter Bootloader Console

  1. Connect DHCOM UART1 via null modem cable to the Host PC
  2. Start terminal program (recommended terminal program: TeraTerm) on the Host PC with the following settings:
    Baud rate: 38400
    Data: 8 bit
    Parity: none
    Stop bits: 1 bit
    Flow control: none
  3. Press "del" on the Host PC during Core Module system start to enter bootloader console

U-boot console commands

NAND-Flash

Read from NAND-Flash Device
nand read <SDRAM address> <NAND Flash address> <Bytes>
Example: nand read 80000000 400000 b40000
Description: Copies 11,25MByte from NAND Flash address 0x40_0000 to SDRAM address 0x8000_0000
Erase NAND-Flash blocks
nand erase <Block base address> <Bytes>
Example: nand erase 400000 40000
Description: Deletes NAND Flash content from address 0x40_0000 to 0x43_FFFF
Note: The Bytes information needs to be block size aligned!
Write to NAND-Flash Device
nand write <SDRAM address> <NAND-Flash address> <Bytes>
Example: nand write 80000000 400000 b40000
Description: Copies 11,25MByte from SDRAM address 0x8000_0000 to NAND Flash address 0x40_0000
Note: The Bytes information needs to be page size aligned!
Show bad NAND-Flash blocks
nand bad
Description: Shows the bad NAND-Flash blocks.
Show NAND-Flash content
nand dump <NAND-Flash address>
Example: nand dump 400000
Description: Shows the content of the specified NAND-Flash block

SPI Flash

Only available at iMX25

SPI Flash Init
sf probe <bus:cs> [frequency]
Example: sf probe 0:1
Description: Initializes the OnBoard SPI Flash
SPI Flash Read
sf read <SDRAM address> <SPI Flash address> <Bytes>
Example: sf read 80000000 40000 10000
Description: Copies 64kByte from SPI Flash address 0x4_0000 to SDRAM address 0x8000_0000
SPI Flash Write
sf write <SDRAM address> <SPI Flash address> <Bytes>
Example: sf write 80000000 40000 10000
Description: Copies 64kByte from SDRAM address 0x8000_0000 to SPI Flash address 0x4_0000
SPI Flash Erase
sf erase <SPI Flash address> <Bytes>
Example: sf erase 40000 10000
Description: Deletes SPI Flash content from address 0x4_0000 to 0x4_FFFF
Note: The Bytes information needs to be sector size aligned!

LCD contoller

Show LCD controller settings
lcdinfo
Example output:
 Display Resolution: 800 x 480 pixels
 Display Type:       Active Color Display
 Pixel Clock:        22 MHz
 Bits per Pixel:     16 Bits/Pixel
 Pixel Polarity:     Active High
 VSYNC Polarity:     Active Low
 HSYNC Polarity:     Active Low
 Clock Polarity:     Pos. Edge
 Output En Polarity: Active High
 HSYNC Puls Width:   64 Clock Cycles
 HSYNC Back Porch:   86 Clock Cycles
 HSYNC Front Porch:  42 Clock Cycles
 VSYNC Puls Width:   2 Line Cycles
 VSYNC Back Porch:   33 Line Cycles
 VSYNC Front Porch:  10 Line Cycles

GPIO's

Show DHCOM GPIO settings
gpioinfo
Example output:
 GPIO_A: Direction = Input
         State     = 0
 GPIO_B: Direction = Input
         State     = 0
 GPIO_C: Direction = Input
         State     = 0
 GPIO_D: Direction = Input
         State     = 0
 GPIO_E: Direction = Input
         State     = 1
 GPIO_F: Direction = Input
         State     = 1
 GPIO_G: Direction = Output
         State     = 1
 GPIO_H: Direction = Input
         State     = 1
 GPIO_I: Direction = Input
         State     = 1
 GPIO_J: Direction = Input
         State     = 1
 GPIO_K: Direction = Input
         State     = 0

SD/MMC Card

DHCOM iMX25:
Switch between MicroSD and SD Slot
mmcswitch <Slot number>
Example: mmcswitch 2
Description: Switch between SD/MMC Slots: 1 --> SD/MMC Slot, 2 --> MicroSD Slot
Initialize SD/MMC Card
mmcinit
Description: Initialize new inserted SD Card


DHCOM AM35:
Switch between onboard microSD Slot and external SD - Card interface
mmc switch <Slot number>
Example: mmc switch 2
Description: available interfaces
  • 1 --> external SD/MMC Slot
  • 2 --> onboard microSD Slot
Initialize SD/MMC Card
mmc init
Description: Initialize new inserted SD Card

FAT - Filesystem

Show Filesystem information
fatinfo <interface> <device>
Example: fatinfo mmc 1
Interface: MMC
 Device 1: Vendor: Man 094150 Snr 266e068c Rev: 1.0 Prod: AF UD
           Type: Removable Hard Disk
           Capacity: 121.2 MB = 0.1 GB (248320 x 512)
 Partition 1: Filesystem: FAT16 "NO NAME    "
List files
fatls <interface> <device> <directory>
Example 1: fatls mmc 1
Example 2: fatls mmc 1 /folder
Load Files from SD Card to SDRAM
fatload <interface> <device> <SDRAM address> <directory+filename>
Example 1: fatload mmc 1 80100000 nk.gz
Example 2: fatload mmc 1 80100000 /folder/nk.gz

Ethernet

Load File via TFTP to SDRAM
tftp <SDRAM address> <directory+filename>
Example: tftp 80100000 nk.gz
Example TFTP Server: "Winagents TFTP Server Manager"
Note: For TFTP download it is necessary to config the ENV variables "ipaddr" and "serverip"
Load File via TFTP to SDRAM using DHCP
dhcp <SDRAM address> <directory+filename>
Example: dhcp 80100000 nk.gz
Example TFTP Server: "Winagents TFTP Server Manager"
Note: It is necessary to config the ENV variable "serverip" with the ip-address of your TFTP-Server
Ping
ping <IP address>
Example: ping 192.168.55.32
Read PHY register via MII interface
mii dump <PHY address> <PHY register>
DHCOM iMX25:
Example: mii dump 1 0
Description: Shows PHY control register content.
DHCOM AM35:
Example: mii dump 0 0
Remark: The standard MII registers 0-5 are supported by this command. When you are working with a DHCOM AM35 module only PHY address "0" is allowed.

Environment

Show ENV variables
printenv 
bootdelay=0
baudrate=38400
ipaddr=192.168.55.230
serverip=192.168.55.36
gatewayip=192.168.55.36
netmask=255.255.255.0
frias=5
kernel=uImage
bootargs=console=ttymxc0,115200 root=/dev/mmcblk0p2
nandbootwince=update;bootwince 00200000
splashimage=0x000c0000
save_ENV_to_flash=setenv ENVinFlash 1; saveenv
ENVinFlash=1
ethaddr=00:04:a3:34:b6:0d
ethact=FEC0
winceimagetype=nk.gz
winceimagesize=00ba55ee
loadaddr=00200000
bootcmd=run nandbootwince
filesize=212050
Environment size: 449/262140 bytes
Set ENV variables
setenv <ENV name> <ENV value>
Example: setenv ipaddr 192.168.55.2
Note: If you need to edit "bootcmd" it is necessary to insert ";" between the unique commands. You can enter ";" at the command line with "\;".
Save ENV variables
saveenv
Erase all ENV variables
eraseenv
Note: It is necessary to restart the system after "eraseenv", to restore the default ENV settings.

Update

update <type> [filename]
Type:
auto = Start the automatic update with a DHupdate.ini file.
wince = WinCE image update (default file names nk.gz or nk.bin) + ENV update
linux = Linux image update (default file name uImage) + ENV update (default script file name uImage.env)
Remark:The ENV update script must have the same filename as the linux-kernel with the ending ".env". It is possible to update the environment of u-boot without a kernel update by inserting the filename of the ENV script.
rootfs = Create or replace the root-filesystem in the NAND-Flash (default file name fsroot.tar.gz). The rootfs update has to be the last item (or second to last item if you insert the reset command) in the DHupdate.ini file.
Remark: To run a "NAND-Flash root-filesystem update" you need a special linux-kernel which must have the filename "uImage.update" and must be available in the same diretory on your update-media as the DHupdate.ini file.
flash = Complete flash image update
bootloader = Bootloader update (default file name u-boot.bin)
splash = Bootbitmap update (default file name splash.bmp)
settings = Settings block update (default file name settings.bin)
eeprom = Display-Settings block update (default file name eeprom.bin)
reset = Execute a reset after a successfull update. A reset can only be the last item in a DHupdate.ini file.
Remark: Be careful with the reset command. You can easily build a endless update loop by mistake.
For further information look at DHCOM Flash Update.

I2C

List available devices
i2c probe 
Valid chip addresses: 00 57 6F
0x5F = DHCOM i.MX25 Core Module EEPROM
0x6F = DHCOM i.MX25 Core Module Real Time Clock
Read
i2c md <I2C address> <start address> <end address>
Example: i2c md 57 10 20
Description: Reads 16 Bytes from the address 0x10 to address 0x20.
Write
i2c mw <I2C address> <I2C register> <Value> <Bytes>
Example: i2c mw 57 0 aa 5
Description: Writes 0xaa to 5 Bytes from the offset 0.

OS Boot

WinCE
bootwince <Image address> [debug]
Example: bootwince 200000
Description: The address 0x20_0000 specifies NAND Flash image address. The image is loaded from NAND flash to SDRAM. Next to that u-boot starts WinCE. The "debug" option make sure that the image wouldn't be started after uncompressing.
Note: The Image address could also be an SDRAM address. But it is necessary to copy the Image (via tftp or nand flash commands) to the SDRAM before calling "bootwince".
bootwince tftp
Note: The ENV variables "loadaddr" and "bootfile" needs to be set before calling the command. For *.gz image types the "loadaddr" should be set to 0x8290_0000 and for *.bin images the address should be 0x8100_0000.
Linux
bootm <Kernel address> [arg]
Note: When booting a Linux kernel,‘arg' can be the address of an initrd image.

Unzip

unzip <source address> <destination address>
Example: unzip 82900000 80100000
Note: The unzip command is supporting the gzip file format.

Bitmap

Information
bmp info <Bitmap address> 
Image size    : 800 x 480
Bits per pixel: 8
Compression   : 0
Display
bmp display <Bitmap SDRAM address> [x y]

Memory

Display
md[.b, .w, .l] <address> [count]
Example: md.b 80100000 100
Write
mw[.b, .w, .l] <address> <value> [count]
Example: mw.b 80100000 aa 100
Description: Writes the value 0xaa to the next 0x100 bytes from the address 0x8010_0000.
Copy
cp[.b, .w, .l] <source> <destination> <count>

Show DHCOM Settings

settings
Example:
 VALIDATION_ID:    "DH"
 DISPLAY_ID:       0x00
 LENGTH:           0x2c
 X_RESOLUTION:     800 pixel
 Y_RESOLUTION:     480 pixel
 PIXEL_CLOCK:      22200 kHz
 LCD_CONFIG_FLAGS: 0x3e3
 HSW:              64 pixel clocks
 VSW:              2 line clocks
 HFP:              42 pixel clocks
 HBP:              86 pixel clocks
 VFP:              10 line clocks
 VBP:              33 line clocks
 DATALINES:        16
 ACB:              0
 ACBI:             0
 GPIO_DIR:         0x01ff
 GPIO_STATE:       0x0000
 HW_CONFIG_FLAGS:  0x001e

NAND Flash allocation

Linux
Bootloader 0x0000_0000 - 0x000B_FFFF
Internal 0x000C_0000 - 0x0027_FFFF
Linux Kernel 0x0028_0000 - 0x005F_FFFF
Flashdisk 0x0060_0000 - ...
WinCE
Bootloader 0x0000_0000 - 0x000B_FFFF
Internal 0x000C_0000 - 0x0027_FFFF
WinCE Image 0x0028_0000 - 0x01FF_FFFF
Flashdisk 0x0200_0000 - ...

How to do Updates

How to create a settings.bin file

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