Hi, I need to set a GPIO output high as early as possible during the startup and keep it active until the system shuts down. What I did so far:
- Use GPIO 0.7 for testing - Set GPIO0.7 high in python script automatically after startup -> GPIO becomes high approx. 24s after power-on - Modify device tree to set GPIO0.7 high -> GPIO becomes high approx. 9s after startup - Set GPIO0.7 high in u-boot scipt (/boot/boot.scr) -> GPIO becomes high after approx. 3.5s, but becomes low again after approx. 6s My problem now is that the GPIO becomes low for approx. 3s after it was set by u-boot and before the device tree. I guess I need to understand the kernel boot process a little bit better. Any suggestion, where to start or any hint where to look at? Regards Axel -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
