I could use help with this problem. To simulate our custom board, I’m using Toradex Col Eval 3.2 with Col VF61 v1.2A processor. I erased NAND Flash to remove Windows eboot expecting that I could put it back by using UART A interface. However, I see nothing on the minicom terminal when I power the eval board. I tried pressing the recovery mode switch prior to power to place the processor in recovery mode. I’ve tried shorting the recovery pads together on the SOM. If I execute “update.sh -d /dev/ttyUSB0”, it fails with the error response “sudo: unable to execute vf_flash/imx_uart: No such file or directory” which I believe is caused by the VF61 processor not in recovery mode and not listening to UART A. I have followed the procedures in “VFxx Recovery Mode” repeatedly with no results. I’m using Ubuntu 14.04 Linux.
Background: We’re building custom board that will include the Toradex VF61 SOM. The board will not have SD card or USB port. It will have UART A interface and Ethernet . Our goal is to be able to remove Windows Eboot, somehow flash u-boot using UART A then have u-boot TFTP Linux over Ethernet.