We’ve been changing the MAC address of Colibri T20 modules to use our company’s MAC address range with WinCE successfully for many years. I set the MAC address on the T20 by setting the registry key [HKLM\Comm\AX88772B1\Params\NetworkAddress] as described in this post:
We are in the process of migrating our products from the T20 to the iMX6 due to the T20 becoming obsolete. But this technique doesn’t work on the iMX6. I tried simply writing to the registry key [HKLM\Comm\ENET1\Params\NetworkAddress] on the iMX6 but that had no effect.
Can you tell me how to change the MAC address on the iMX6 with WinCE?
Hi @alex.tx modifying those settings also changes the serial number of the module which is returned by calling Sys_GetConfigInt(hSys, L"Serial8", &serial)
Is it not possible to set the MAC address without corrupting the serial number in the config block? The T20 had this issue too, but using the registry key was a way to work around it and change only the MAC address without affecting the serial number.
Recording my solution in case anyone else needs to do this.
I’m looking for a method which can be easily automated on our production line. Using a registry key on the T20 was very convenient and easy to automate. Accessing the bootloader menu isn’t easy as we don’t expose the serial port used by the bootloader in our product design, and it wouldn’t be elegant to have to use the bootloader menu on the production line. So what I have implemented is to have my firmware store a backup copy of the Colibri serial number so I can access it later to track the modules, and then call the ConfigBlockEditor tool using a batch file as a command line parameter. The batch file looks like this: