Bootup failure


#1

Hi,

When I try to connect a sensor board to the Dragonboard using the 2 GPIOs, a black screen full of the error sysrq: SysRq : HELP : loglevel(0-9) reboot (b) crash©… appears.
Then my linux won’t start.
What can be the reason for this? I would like to read the GPIO data but apparently it crashes everything then?


#2

Hi @greenh,

Are you using breadboard and trying to connect GPIO on LS connectors?
It looks like you are having kernel error message.

There are several resources about using GPIO on 96Boards.

http://www.96boards.org/blog/bringing-standardization-linux-gpio-96boards/

https://github.com/96boards/Starter_Kit_for_96Boards

http://www.96boards.org/blog/programing-i2c-devices-libmraa-libupm/