Hi,
On 10-07-16 23:13, Steven Saunderson wrote:
Hi,
I have an A33 powered tablet (10" PendoPad) and I'm trying to get it to boot
from SD card. I'd like to change this Android box into a Linux box.
I'm using the latest U-Boot with settings from the A33 configs that are supplied. I have a
monitor connected to the UART0 pins on the board and can see the boot0/boot1 output when the
tablet boots from NAND. But when I try to boot from SD card all I see are strings of jibberish
(e.g. "2666&& "). I've tried monitoring at different baud rates.
I realise that U-Boot won't get very far because probably many other settings
are wrong for the hardware. But I thought I would be able to at least get some
sensible output on UART0.
I'm writing u-boot-sunxi-with-spl to offset 8kB in the SD card. Is this
correct for the A33 ?
Yes that is correct.
Does anybody have any suggestions I can try ?
How did you create your u-boot defconfig? It sounds like you're not using the
right uart
pins, for most A33 tablets you need:
CONFIG_SYS_EXTRA_OPTIONS="CONS_INDEX=5"
In you're u-boot defconfig, if you already have that then try dropping it :)
I would advice you to start with a pre-existing defconfig, e.g the
ga10h_v1_1_defconfig, which is for a 10" tablet, which with some luck
maybe a lot like yours (all tablets seem to copy from the same reference
design, and other then the wifi / accelerometer / touchscreen and
chosen lcd panel seem to all be identical.
Regards,
Hans
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