mbed OS 5 bootloader for AT45 SPI Flash

Bootloader used for firmware updates over LoRaWAN. Tested with L-Tek FF1705 - based on Multi-Tech xDot.

How to build

1. Install mbed CLI and the GNU ARM Embedded Toolchain.

2. Import this project:

   $ mbed import https://github.com/armmbed/lorawan-fota-bootloader
   

3. Build the project:

   $ mbed compile -m xdot_l151cc -t GCC_ARM --profile ./profiles/release.json
   

Note that the bootloader size is currently set to 0x7000, but you can set this lower when building for a release profile if you need more space for your application.

Debug messages

If you want to see debug messages on the serial port (baud rate 9,600):

1. Build with:

   $ mbed compile -m xdot_l151cc -t GCC_ARM --profile ./profile/develop.json
   

Acknowledgements

Based on the initial work by Chris Snow.