Buttonless DFU with GCC

[anasimtiaz]

Hi,

I seem to be stuck on a rather simple problem here which I am unable to figure out. I am using SDK 12.2 with PCA10040 board.

When I am compiling the experimental buttonless DFU example with gcc, the MCU doesn't start at all even after a reset. I am not using the bootloader at this point just the application itself with SoftDevice S132 v3.0.0.

However if I compile using Keil and follow exactly the same steps it works normally as expected advertising itself.

Here's what I did:

1. Compile buttonless dfu using gcc (gcc_app.hex)
2. Compile buttonless dfu using keil (keil_app.hex)
3. Erase the chip->Flash SD->Flash gcc_app.hex->Restart ---> This does not work
4. Erase the chip->Flash SD->Flash keil_app.hex->Restart ---> This works
5. Erase the chip->Flash SD->Flash ble_app_hrs (compiled with gcc) ---> This works, so no gcc toolchain issue here.

Just to be sure I am programming everything with nrfjprog on the command line so following exactly the same steps. The only difference being the hex file that is produced using gcc and keil.

What could I be doing wrong?

[anasimtiaz]

Still unsure why the app on its own doesn't work but with the bootloader + bootloader settings and following the link below, it seems to be fine:

devzone.nordicsemi.com/.../

[bjorn-spockeli]

@ai(anasimtiaz): This is one of the known issues with the experimental Buttonless DFU example in SDK v12.x.0, which are listed here. This has been fixed in SDK v12.3.0 and later.