[U-Boot] using a GPIO to toggle tftp boot mode
I'm hoping to come up with a way to configure a recovery mechanism using uboot. the idea is if the main OS image needs to be reflashed, or for recovery options.
what are my options for configuring uboot to use a different set of configuration options based on the state of a GPIO line (button)?
thanks! -CG
Hi Chris,
Le 04/07/2011 07:50, Chris Gray a écrit :
I'm hoping to come up with a way to configure a recovery mechanism using uboot. the idea is if the main OS image needs to be reflashed, or for recovery options.
what are my options for configuring uboot to use a different set of configuration options based on the state of a GPIO line (button)?
The cleanest and simplest course would be to use script commands to set up GPIO if it is not already done by the U-Boot code, and set the bootcmd variable to test the GPIO port value on boot and run an internal or tftp boot accordingly. You may want to make sure your board has the HUSH command line interpreter enabled.
thanks!
np.
-CG
Amicalement,
simple & genius. thanks!
On Sun, Jul 3, 2011 at 11:12 PM, Albert ARIBAUD albert.u.boot@aribaud.netwrote:
Hi Chris,
Le 04/07/2011 07:50, Chris Gray a écrit :
I'm hoping to come up with a way to configure a recovery mechanism using
uboot. the idea is if the main OS image needs to be reflashed, or for recovery options.
what are my options for configuring uboot to use a different set of configuration options based on the state of a GPIO line (button)?
The cleanest and simplest course would be to use script commands to set up GPIO if it is not already done by the U-Boot code, and set the bootcmd variable to test the GPIO port value on boot and run an internal or tftp boot accordingly. You may want to make sure your board has the HUSH command line interpreter enabled.
thanks!
np.
-CG
Amicalement,
Albert.
participants (2)
-
Albert ARIBAUD -
Chris Gray