Hi Wolfgang,
On 04/16/2014 12:12 AM, Wolfgang Denk wrote:
What I don't understand is wether you actually want to use this radio transceiver as console interface device in U-Boot, or not. If you want to use it, then just do, and spend thoughts on restricting access to legitimate users and uses.
I do not want to use the radio transceiver as console interface, but maintain the possibility to connect a serial cable to the same UART when I messed it up.
You could implement somewhere in the init code a test that checks the state of the GPIO,and then modifies environment settings (say, bootdelay, or even bootcnt - so you could auto-switch between bootcmd and altbootcmd) to behave one way of the other. Actually this could even be scripted - say in "preboot", so you don't even write a single line of code.
That is a great idea. The following line works fine:
#define CONFIG_PREBOOT "if gpio input 8; then setenv bootdelay 0; else setenv bootdelay -1; fi"
Thank you very much!
Greetings, Florian