BurnInTest Linux (ARM) Serial port question

[PXCScott]

Hi!

Trying to get the serial ports on my Arm (MX8MPlus) based system working via loopback. Device is running Yocto and kernel 5.4.47

From cmdline_config.txt

<Serial>

<Test>
## Device to test - ttys0, ttys1 etc to ttys63
Device ttymxc0
## Test Mode - Loopback or Detect
TestMode Loopback
</Test>

<Test>
## Device to test - ttys0, ttys1 etc to ttys63
Device ttymxc2
## Test Mode - Loopback or Detect
TestMode Loopback
</Test>

When running the status page indicates an error .. and I am not sure why ttymxc0 becomes ttyMXc0 or ttymxc2 becomes ttyMXc2 but I suspect this may be a cause of the issue.



the resulting log (BiTLog2.log) indicates the ports cannot be found which I believe is caused by the uppercase characters.

BiTLog2.log



Any idea how / why the serial port names are being changed and how I can communicate with these serial ports?

Thanks in advance!

Scott

[David.K (Passmark)]

Looks like there's a problem handling some arm devices, this will be fixed in the next update.

In the meantime you can create a symbolic link to the correct serial port.

sudo ln -s /dev/ttymxc0 /dev/ttyMXc0

sudo ln -s /dev/ttymxc2 /dev/ttyMXc2

[PXCScott]

Thanks! This worked just fine. Not sure why I didn't think of that!