Restoring UP Board BIOS Image
Per an earlier post, I managed to brick my UP Board by flashing the 2G/4G Bios update onto a 1GB Board. Now, I'm following the https://wiki.up-community.org/Bios_Update wiki to try to restore the image. I'm connecting to the W25Q64W SOIC using a pomona clip, and I'm running it through an Total Phase SPI Level Shifter. The level shifter provides 1.8V to the BIOS chip and shifts the levels from 1.8 to 3.3. On the 3.3 side I'm using a shikra.
I've triple checked all voltages and connections.
I'm running flashmon with the following command:
sudo flashrom -p ft2232_spi:type=232H
This returns back an unknown SPI device ID message. Through the use of ftdiflash, I've determined that the BIOS chip is returning all zeroes on all SPI transactions.
I was just wondering if anyone else has tried to do in situ bios rom programming on the up board before? The wiki claims you can do it, but I'm thinking that something on the board may be pulling the lines low. Other than that I'm not sure what else could be going wrong, maybe I could take a look at the SPI lines on a scope when I get access to one.