SFU - Second Stage Bootloader for MKR Boards with MKRMEM Shield

[aentinger]

SFU is a second stage bootloader for MKR boards with MKRMEM shield. The SFU is loaded by the ATSAMD21G18 bootloader and in turn loads the firmware image stored on the MKRMEM shield.

Requires: Arduino MKR board + Arduino MKR MEM Shield

How-to-use:

• Include <SFU.h> at the top of your sketch

#include <SFU.h>

• Export the binary via Menu Sketch -> Export Compiled Binary
• Convert sketch to C byte array file Binary.h

cat MY_SKETCH.bin | xxd --include > Binary.h

• Copy Binary.h to SFU/examples/SFU_LoadBinary
• Use sketch SFU_LoadBinary to download binary update file to MKRMEM shield
• Upload your SFU-enabled sketch - the update is performed automatically and then your sketch is started.

[aentinger]

Successfully tested with MKR WiFi 1010 + MKR MEM Shield.