Error Building Pixhawk in External mode

Help,I can't build on Matlab with PX4:

>> PixhawkPSP('/usr/local/MATLAB/px4')

Found compatible version R2017b Using Target Package path of /usr/local/MATLAB/px4

Error using sprintf Function is not defined for 'cell' inputs.

Error in codertarget.pixhawk.Px4PSP_Install_UI/build_firmware_callback

Error using matlab.ui.control.internal.controller.ComponentController/executeUserCallback (line 309) Error while evaluating Button PrivateButtonPushedFcn.

Operation terminated by user during PixhawkPSP (line 82)

[Steve Kuznicki]

We are looking into this and will provide a workaround/solution.

[Steve Kuznicki]

By the way - you don't need to "build" the firmware using this UI. I would suggest using the UI for downloading the firmware, then exit the UI. Then using a terminal window, go to the "Firmware" folder and issue a "make px4fmu-v2_default" (or whatever target you have). If you can build the firmware using this method, then you should be good to go using a Simulink model and "build".

Answer 1

[Erlantz Otaola]

The same problem here. I haven't found a solution yet.

[Erlantz Otaola]

We did eventually notice that we were using a gcc-7 compiler. The right way to do it is using the gcc-5.4 compiler, which solves that error.

[N/A]

Can you elaborate on the settings you set in Simulink, to get the ext_mode_intro.slx example working? For example, what settings need to be set in Simulation > Model Configuration Parameters > Hardware Board settings > Target hardware resources > External mode options?

I currently have

"Data Exchange Serial Port" = ttyACM0 (Ubuntu 18.04, Matlab 2017b, and since I use the USB cable directly, no FTDI)

"Baud Rate Select" = 115200

Furthermore, under Model Configuration Parameters > External mode configuration, I have:

"Transport layer" = serial . Mex-file name: ext_serial_win32_comm (unable to change that fromhere)

"MEX-file arguments" = 1 8 115200 5

I suspect that there is some discrepancy in defining these arguments, involving COM ports in Linux.

Any tips or suggestions are welcome!