sam3 version check changed

[cmetz]

I tried my very best, but please test it, i hate bash scripting!

added a new way to check whether a new firmware needs to be programmed into the sam3

• sam3s_rpi_sysfs_check.cfg does a 'flash verify_bank' against ch.bin
• sam3-program.bash matches the result of the verify against: -- 'contents differ' = new firmware -- 'sam3-gpnvm1: 0' == wrong boot mode, it should be 1
• reduced the retry counter from 30 to 5, if the program fails
• added a short sleep of 1s at the end of try_program to be sure everything is fine (not sure if it's needed)

[kdpatino]

Hello @cmetz . Thank You! I will test it :+1: If you want to know more about the Software inside the sam3s https://github.com/matrix-io/matrix-creator-mcu

[cmetz]

Hi @kdpatino,

Yeah, i read and compiled it, but first i want to check, if there is way to run and debug firmware without flashing it. Maybe there is a way with the integrated SAM-BA, but i'm a hardware noob.

This pullrequest can be enhanced further, e.g. fixing the boot option without flashing the firmware and vice versa, but i didn't want to make the script even more complex.

I'm still uncertain if its realy bad to flash the exact same firmeware everytime, because there is no explicit erase. (same for the gpnvm bits). i tried googleing it, but did not find any information about it. i'll ask a colleague next week.

i also wrote you a private message in the community. maybe we can discuss there if you have more time, after releasing the kernel drivers... 🥇