i.MX51 SODIMM PC Loading bootloader

This page shows the steps how to initiate On-Chip Debugging and load bootloader into i.MX51 SODIMM PC - Development kit.

JTAG Debugger and Programmer Installation

• Connect JTAG Cable to USB port on a computer. JTAG device should be automatically recognized and prepared for usage.
• Download OpenOCD v0.6.0 software
• Unzip the files

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Running Open On-Chip Debugger

Locate the folder where the software was unpacked. Run OpenOCD utility in command line (by using Total Commander or Windows Command Prompt):

openocd.exe -f wmx51w.cfg

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Debugging session was opened and running:
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Connecting to Open On-Chip Debugger session

Using Windows Telnet Client

Click on Start/Run (or press Windows key + R), and open the Telnet session using 4444 port:

telnet localhost 4444

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Telnet session is active and ready for use:
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Using terminal emulator

To open Telnet service using TeraTerm program, click on File/New Connection, select TCP/IP option and type 4444 into TCP port# field. The IP address to connect to is localhost (127.0.0.1):
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TeraTerm session is running and ready for use:
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Establishing serial connection

Open TeraTerm program, click on File/New Connection, choose Serial and select the port which was assigned to the JTAG device:
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A successful connection is created only if the following serial port settings are applied (115200, 8n1):
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Boot mode options

H902 jumper (BOOTMODE) allows to choose different bootloader sources:

• Serial boot (Internal boot) is enabled when a link is placed between pins 1 and 2
• Direct Boot is selected when pins 2 and 3 are shortened.

Important: In a standard module configuration serial (internal) boot mode is active by default. This setting has a higher priority than boot mode jumper selection. No boot mode changes are needed during firmware loading.

Direct Boot	Serial Boot

Loading bootloader

The following commands need to be placed inside Localhost Telnet session and executed one by one. Console logs are included for comparison:

reset_halt

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step

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resume

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vmx51_init

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boot

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Barebox was loaded into the i.MX51 SODIMM PC Module SRAM and executed:
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Module's MAC address is entered and setup (it can be found on the sticker placed on the module):
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As the fresh Barebox is stored in SRAM only at this point, switching the module off causes bootloader to erase. To store the new Barebox and use it automatically after power on, flashing the image is required. Follow this section to do so.