Howto export nRF51DK project from online mbed compiler to ARM GCC toolchain?

[arneme]

I have tried to export a very simple mbed program (blinks LED1 and LED2 and writes to Serial (USBTX, USBRX)) with no success. I am running on an Ubuntu 32 bit distro. This is what I have done:

1. Exported the program from mbed online compiler (developer.mbed.org/compiler) as GCC ARM Embedded:

2. Installed the GCC ARM Toolchain (launchpad.net/gcc-arm-embedded) in /usr/local

3. Modified the following in the Makefile associated with the export in 1):

GCC_BIN = /usr/local/gcc-arm-none-eabi-5_2-2015q4/bin/

SOFTDEVICE = mbed/TARGET_NRF51_DK/TARGET_NORDIC/TARGET_MCU_NRF51822/Lib/s110_nrf51822_8_0_0/s110_nrf51822_8.0.0_softdevice.hex

The SOFTDEVICE entry was modified since the original exported Makefile referred to an older version that was not part of the export.

4. Installed srecord (sudo apt-get install srecord) to support the SREC_CAT definition in the Makefile

5. executed make clean; make; make merge

The make targets executed with success and produced a combined.hex file. The combined.hex file was dropped in the JLINK folder but unfortunately does not run.

Dropping the hex file produced by mbed to JLINK folder works fine.

What have I missed?

[paul_tanner]

Is there another way to compile programs with the mbed online compiler and somehow include the softdevice? In other words is there an easier way than exporting and building with GCC. (It would be good to have a tutorial on soft devices with the mbed IDE.)