Error in PX4 SITL with UAV Toolbox Support Package for PX4 Autopilots

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Salvatore Matteo Mennea
回答： Thiago Felippe 2023-9-20
I'm performing SITL on Windows 11 with jmavsim using UAV Toolbox Support Package for PX4 Autopilots but I got an error:
On the diagnostic view I got:
Top model targets built: Model Action Rebuild Reason ==================================================================================
openloop_2022b Code generated. Global variable px4_Bus_actuator_armed changed. 1 of 1 models built (0 models already up to date) Build duration: 0h 2m 11.97s
action: EXT_INIT Creating Target Handler (XCP on TCP/IP)... Build directory: D:\model validation\matlab2022b\openloop_2022b_ert_rtw Target name: 127.0.0.1 Target port: 17725 action: EXT_CONNECT Connecting to the target...
External Mode Open Protocol Connect command failed
Caused by:
  • Could not connect to target application: XCP TCP/IP error: Connect failed
Component:Simulink | Category:Block diagram error
Unable to connect to the 'PX4 Host Target' target for 'openloop_2022b'.
On the cmd, I got:

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采纳的回答

Thiago Felippe
Thiago Felippe 2023-9-20
I had the same problem. I found the following workaround:
  • Click in "Monitor & Tune"
  • Wait for the Simulink error. Wait a little more.
  • Don't close the command window nor the jMAVSim
  • Go in the down arrow in "Monitor & Tune" and change it to "Connect" (under "Step by Step Commands"). See image below:
  • Wait until the connection is made
  • Click in "Start" (it shows in place of "Monitor & Tune"). See image below:
  • And it is done!
I think the Simulink doesn't wait to PX4 Host Target to fully boot up before trying to communicate with it.

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