Cross-compile PC-ble-driver for arm7-32bit architecture on x86-64bit linux host

[K.Khan]

Hi All,

 

       We have tested the DFU(nrf52840) from a central to the target device over the BLE. In which a central device attached to the PC(x86-64bit Linux) via a Serial USB. We run this test using nrfuti on linux machine and it's work. Now we want to create the same environment for the gateway which is based on arm7-32bit architecture. We successfully installed the nrfutil on arm32 arch, but we stuck when run the DFU command because pc-ble-driver shard object not created for x86_32.

" raise RuntimeError("Could not load shared library {} : '{}'.".format(shlib_path, error))
RuntimeError: Could not load shared library /usr/lib/python3.5/site-packages/pc_ble_driver_py/lib/linux/x86_32/libpc_ble_driver_shared_sd_api_v3.so : '/usr/lib/python3.5/site-packages/pc_ble_driver_py/lib/linux/x86_32/libpc_ble_driver_shared_sd_api_v3.so: cannot open shared object file: No such file or directory'. "

    We tried to follow the steps given at https://github.com/NordicSemiconductor/pc-ble-driver#Compiling-pc-ble-driver-from-source, but facing an error when we run a command

$ vcpkg install asio catch2 spdlog
Error: Invalid vcpkg root directory /home/kashif/Downloads/pc-ble-driver-master/build/home/kashif/vcpkg: No such file or directory

Questions:

1. Does the steps mentioned in above link, will help to cross-compile the pc-ble-driver for arm-32bit arch.
2. if no, then can you please share what steps need to be followed for cross-compilation.

Thank You,

K.Khan

[K.Khan]

Hi,

We have successfully build the libraries and compile everything on RPI-2(ARM-32 bit core).  We have installed the following :

python3.8

nrfutil version- 6.1.0

pc-ble-driver-py version - 0.15.0

pc-ble-driver - 4.1.2

  After all, We connected a NRF52840 custom board with RPI ( flashed with a connectivity firmware 'connectivity_4.1.2_usb_for_s132_5.1.0.hex' only) . We are able to run 'nrfutil dfu' command over RPI and successfully updated the firmware to another NRF52840(flashed with bootloader and softdevice) over ble. 

Sometimes we are getting below mentioned error during dfu:

" File "/usr/local/lib/python3.8/site-packages/pc_ble_driver_py-0.15.0-py3.8-linux-armv7l.egg/pc_ble_driver_py/ble_driver.py", line 103, in wrapper

    raise NordicSemiException(

pc_ble_driver_py.exceptions.NordicSemiException: Failed to ble_gattc_write. Error code: NRF_ERROR_SD_RPC_NO_RESPONSE" 

Can anyone please let us know, Why are we getting this error?

What action can be taken to resolve this?

Thank You!

K.Khan

[Stian Røed Hafskjold]

Hi, can you try to turn off the MSD like described here: https://docs.zephyrproject.org/1.12.0/tools/nordic_segger.html#disabling-the-mass-storage-device-functionality

[K.Khan]

Hi,

"Hi, can you try to turn off the MSD like described here:"

I tried to turn off the MSD, I run the command on JLinkExe:

> MSDDisable

it shows "Probe configured successfully". But still getting the same error during dfu.

Is there any other way to resolve the issue?

Thank You,

K.Khan