PCA 1000(1) JLINK/UART visible on Linux?

RE: PCA 1000(1) JLINK/UART visible on Linux?

Yngve Halmø — Wed, 29 Oct 2014 08:23:19 GMT

Actually, by some stroke of magic, I'm now getting data out from ttyACM0 despite the error. I guess I have to figure out a way to talk to the modem then, instead of a USB device. If anyone has any ideas that would be helpful, but that's not a Nordic problem. Cheers.

RE: PCA 1000(1) JLINK/UART visible on Linux?

Yngve Halmø — Wed, 29 Oct 2014 08:10:07 GMT

It was installed automatically by the jlink debian package. So it's there. But I don't if the rules are correct/work as intended.

RE: PCA 1000(1) JLINK/UART visible on Linux?

Håkon Alseth — Wed, 29 Oct 2014 08:03:01 GMT

Did you add the udev rules for jlink? Should be a 99-jlink.rules that you need to copy into /etc/udev/rules.d/

RE: PCA 1000(1) JLINK/UART visible on Linux?

Yngve Halmø — Wed, 29 Oct 2014 07:39:09 GMT

I get the following output in syslog when I connect the USB device:

Oct 29 08:15:53 jobbox ModemManager[862]: Could not grab port (tty/ttyACM0): 'Cannot add port 'tty/ttyACM0', unhandled serial type' Oct 29 08:15:53 jobbox ModemManager[862]: Couldn't create modem for device at '/sys/devices/pci0000:00/0000:00:1c.6/0000:0f:00.0/usb3/3-2': Failed to find primary AT port

Any idea what the problem is?

(I am using ubuntu 14.04 x64)

RE: PCA 1000(1) JLINK/UART visible on Linux?

Håkon Alseth — Tue, 21 Oct 2014 13:22:32 GMT

Hi,

Under linux, the device will enumerate as a "USB modem" (a subclass of USB CDC), and it should be accessible under /dev/ttyACMx, where x is normally 0 unless you have more of this specific usb class connected to your PC. To see if the enumeration is successful, you can do something like this:

dmesg | grep SEGGER

It should post something similar to this:

[   28.805067] usb 1-2: Manufacturer: SEGGER

Note that you may have to be root in order to access the com-port, depending on how your distro is setup. I used "putty" to setup the serial communication.

Also be sure to read the JLink readme file. You may have to add a udev rule, depending on your system.

Cheers, Håkon