HITL with voxl 2
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@Eric-Katzfey
The issue is fixed. It was a hardware issue. I changed the ftdi cable and the issue was solved. The previous FTDI cable was not allowing me to change anything in /sys/bus/usb-serial/devices/ttyUSB0 directory. The file latency_timer was also not there. However with the other cable, there is no such issue. Thank you for your valuable input. -
For 3.3v J18 jst port which port of ftdi cable should be used, CTS# or RTS# ?
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@Tamas-Pal-0 For UART it is just GND, TX, and RX
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@Eric-Katzfey you mean we only have to connect 3 pins in j18 port ?
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@Tamas-Pal-0 Yes, the fourth pin is power and we don't want that one.
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Is there any way to verify that FTDI cable is connected properly with J18 port ?
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@Tamas-Pal-0 The easiest way would be to recompile the modalai_dsp PX4 driver to add more debug messages. But if you aren't comfortable with that then we'll need to come up with something else.
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How to do that? Is there any other way to this ?
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@Tamas-Pal-0 The simulator will be sending heartbeat messages out over the serial cable. You can use the
screenprogram to see if anything is coming from voxl 2 in the serial cable. -
@Eric-Katzfey How to use screen program in this case ?
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@Tamas-Pal-0
screenis just a standard Linux program. There are many ways to check the output of the serial port. To start, you could always just docat /dev/ttyUSB0and see if anything is coming out. This post shows how to get a hex dump: https://superuser.com/questions/1402386/view-serial-device-output-in-console-in-hex -
The problem is solved. The problem was with ftdi cable. Thank you for your valuable inputs
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@Tamas-Pal-0 Excellent! How were you able to determine that it was the cable?
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@Eric-Katzfey @Tamas-Pal-0 For future users troubleshooting HITL setup, I was having the same issue as above. This cable would not allow me to set the latency or share data with the VOXL 2 through J18 port, but this cable works as intended.
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@Taylor-Presley Right. Some cables work some don't.
