COM AM35 Bootloader U-Boot: Difference between revisions

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== FAQ ==
== FAQ ==
:'''Q: Entering Bootloader console is not possible?'''
:'''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"). From version V1.15.0.0 it is only possible to enter the bootloader console by pressing the "del" key.
:'''A:''' It is not possible to enter to the bootloader console by pressing any key (e.g. "Enter") on your keyboard. You have to press "del" key. If your terminal software does not send the "delete" key we recommend to use teraterm. The ASCII value of the delete key is 0x7F.
 
:'''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.
 
:'''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.


== Changelog ==
== Changelog ==
Line 43: Line 21:


== Enter Bootloader Console ==
== Enter Bootloader Console ==
:#Connect DHCOM UART1 via null modem cable to the Host PC
:#Connect DHCOM UART1 (FF UART) via null modem cable to the RS232 Port of your PC
:#Start terminal program (e.g. Tera Term) on the Host PC with the following settings:
:#Start terminal program (e.g. Tera Term) on the Host PC with the following settings:
:#:Baud rate: 38400
:#:Baud rate: 38400

Revision as of 14:26, 8 May 2012

FAQ

Q: Entering Bootloader console is not possible?
A: It is not possible to enter to the bootloader console by pressing any key (e.g. "Enter") on your keyboard. You have to press "del" key. If your terminal software does not send the "delete" key we recommend to use teraterm. The ASCII value of the delete key is 0x7F.

Changelog

Changelog Files

Downloads

Bootloader Binary
Settings Files
DHupdate.ini example
Update Bitmap example files
Splash Image examples

Enter Bootloader Console

  1. Connect DHCOM UART1 (FF UART) via null modem cable to the RS232 Port of your PC
  2. Start terminal program (e.g. Tera Term) 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

How to do Updates

How to create a settings.bin file

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