> well, this little hello-program I want to launch from redboot is just > my example to climb the learning curve of how it has to be done. The > code-part of the program I ultimately want to launch from redboot is > too big to go into RAM. So it has to run from flash. And I need redboot to > have a loader on board, so the application can be updated if required. > Unfortunately I can not use the bootloader that comes with all > AT91SAM7x-based systems, because it (SAM_BA) supports USB and the > serial debug-I/F only and both of them are not implemented (not accesible) on > the board I am using here - hence (a minimum) redboot was identified as the > solution of the problem. > > The FIS in my case only has to take a small script that launches my > big-app if UART0 or UART1 does not receive a ctrl-c character during a timeout > interval of a few seconds. In such a case it would abort the script and > one would be able to use redboot for downloading a program (direct load > into flash). Any comments on these ideas?
Hi Robert, I don't know the AT91SAM7 stuff too well, but I guess as was pointed out, there's a CDL option to change the startup location of a flash app just for the AT91s. From the perspective of what you're trying to do with Redboot and the timeouts, there shouldn't be any problem. I don't know the specifics of that particular AT91 option, and how it behaves, but fundamentally, there's nothing wrong with what you're trying to do. --Chris
