gjt211:
I am trying to implement this on a Feather M0 WiFi and can't get it to work.It seems SDCARD_SS_PIN for the SD is set to 4, which in the Feather M0 WiFi is already in use by the ATWINC1500 WiFi module.
From what I can work out, I need change the SDCARD_SS_PIN in SDUBoot.ini then build via command line with build.sh but on my Mac this is failing.
Can anyone help please?
FYI: I already have working code that downloads the updated firmware to SD card as update.bin but it will never use it as the SS pin is wrong.
SDU supports M0 in new version of Arduino SAMD core (1.6.20). It was in GitHub version from Aug 30.