RE: hrs example -> buttonless dfu infinite loop

Vidar Berg — Tue, 05 Apr 2016 11:03:29 GMT

Could this be true? Meaning, could it be true that buttonless DFU apps cannot be built natively on a Mac using GCC? Does development of buttonless DFU apps require KEIL+Windows?

It was true up to the 8.1.0 release where GCC support added. In other words, SDK 8.1.0 and later should work out-of-the-box with GCC.

I tried the iPhone nRF toolbox, which exhibited the behavior below whenever I tried to update the device by selecting one of the application files hard-wired into the toolbox - i.e. hrs_s110_5.hex - selecting of course to update the Application only.

The bootloader from SDK 7 and later requires an "init" file as an extra safety measurement. More on that here and instructions on how to create it here. You can also test with the pre-made .zip files found in the SDK to verify that the bootloader is working: "\nRF51_SDK_10.0.0\examples\dfu\ble_dfu_send_hex\test_images_update_nrf51\dfu_test_app_hrm_s110.zip"

RE: hrs example -> buttonless dfu infinite loop

Ray — Mon, 04 Apr 2016 23:28:53 GMT

In case it is relevant I should perhaps add that I built the HRS sample application using GCC, with SDK 10.

I found an odd comment in this post: devzone.nordicsemi.com/.../

"Side note: If you use SDK v7.x and want to test buttonless example with gcc compiler, it may not work. The assembly code to branch from application to bootloader was made for KEIL only."

Could this be true? Meaning, could it be true that buttonless DFU apps cannot be built natively on a Mac using GCC? Does development of buttonless DFU apps require KEIL+Windows?