Opening a custom serial port connection

Romain_Chiappinelli · January 11, 2019, 1:50pm

Hi everyone,

I would like to open a custom serial port to send custom data to my computer.
I tried to run the module examples/matlab_csv_serial however I am not able to run it successfully.

github.com

PX4/Firmware/blob/master/src/examples/matlab_csv_serial/matlab_csv_serial.c

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From the NSH console, I typed
maltab_csv_serial start /dev/ttyS1/

First question: I am assuming ttyS1 corresponds to Serial1, is that correct ? (there is a ttyS0, but no Serial0 on my hardware, I am using the AUAV-X2.1)

Connecting a uart to USB cable on the autopilot Serial1, I then open gtkterm, ensuring the same Bauds rate and configuration (8N1). But nothing is read in the desktop terminal.

Has anybody been able to run matlab_csv_serial ? Your comments are welcome.

Thanks,

Romain

Romain_Chiappinelli · January 11, 2019, 3:05pm

another point, my board is configured in HIL, are the uart connections enabled or disabled in HIL mode ? (because I expect the GPIO to be disabled)

Romain_Chiappinelli · January 28, 2019, 6:01pm

[partial solution]

I am able to send data to the uart using the code in matlab_csv_serial, but only on /dev/ttyS5/ which correspond to the debug port on the auav_x21. The problem is that other modules are writing to the debug port.

If I try to send data to /dev/ttyS2/ which correspond to TELEM2 (I also disable TELEM2 by putting SYS_COMPANION to 0), only few messages are sent (like 4 messages). Is there another application closing this serial port ?

Can anybody redirect me to some documentation ?

Charles_Armer · February 14, 2024, 11:50pm

Did you ever find a solution to this?

Romain_Chiappinelli · February 15, 2024, 3:20pm

Yes, I’m able to use the serial ports successfully. I’m using the Pixhawk 4 now and the serial ports are listed in the doc.