I thought that the environment variables are separate from the uboot. I read here: http://docwiki.gumstix.org/Uboot#An_overview_of_flash that it is separate, which would make perfect sense as to why the reflash didn't work. I know I don't have a bad daughtercard because I changed the environment variable and then told uboot to restart my gumstix at which nothing came through either of the serial ports. I'm just trying to get my board fixed because I really don't want to spend money on a new one if I don't have to.
Dave Hylands <firstname.lastname@example.org> wrote:
> While working with my waysmall I changed the environment variable for the
> serial port that is used for console messages from the u-boot and kernel. I
> must have set it to the wrong port or something because now the green power
> light comes on but I don't get anything through either of the serial ports.
> I sent my motherboard to gumstix to get re-flashed thinking that reloading
> the u-boot would flash the default environment variables with
> it. According to gumstix, they re-flashed my board but still couldn't get a
> console message from it. I didn't realize that the u-boot environmental
> variables were located on a different part of the flash than the u-boot and
> that's probably why the re-flash didn't fix it (I assume only the part of
> the flash with the u-boot code was re-flashed). I have a friend with a
> jtag connector and the software to go about working with the flash. The
> problem is that if I an JTAG my board and access the flash how would I go
> about changing the environment variables. I have never had to work with the
> flash or JTAG before. If anyone can answer my question or has had a simalar
> problem and could offer some instructions or advice that would be great.
The u-boot environment variable ARE located in the same pages as u-boot.
So if it was reflashed and you're still not seeing any output, then
you may have a bad daughtercard/serial cable, etc, or the reflash may
not have actually worked.
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