Cannot connect

[darkbox]

Hi, I am new to pulseview and logic analyzers for that matter. I've uploaded the latest firmware to a rp2040 zero board but is not detected by pulseview and the "choose driver" dropdown is empty.

I need to install something else?

lsusb shows the device conected as:

Bus 003 Device 011: ID 16c0:27dd Van Ooijen Technische Informatica CDC-ACM class devices (modems)

using Ubuntu 23.04

[dotcypress]

Hey @darkbox
Could you please run ls /dev/tty*?

[darkbox]

The output is:

/dev/tty    /dev/tty23  /dev/tty39  /dev/tty54      /dev/ttyS1   /dev/ttyS25
/dev/tty0   /dev/tty24  /dev/tty4   /dev/tty55      /dev/ttyS10  /dev/ttyS26
/dev/tty1   /dev/tty25  /dev/tty40  /dev/tty56      /dev/ttyS11  /dev/ttyS27
/dev/tty10  /dev/tty26  /dev/tty41  /dev/tty57      /dev/ttyS12  /dev/ttyS28
/dev/tty11  /dev/tty27  /dev/tty42  /dev/tty58      /dev/ttyS13  /dev/ttyS29
/dev/tty12  /dev/tty28  /dev/tty43  /dev/tty59      /dev/ttyS14  /dev/ttyS3
/dev/tty13  /dev/tty29  /dev/tty44  /dev/tty6       /dev/ttyS15  /dev/ttyS30
/dev/tty14  /dev/tty3   /dev/tty45  /dev/tty60      /dev/ttyS16  /dev/ttyS31
/dev/tty15  /dev/tty30  /dev/tty46  /dev/tty61      /dev/ttyS17  /dev/ttyS4
/dev/tty16  /dev/tty31  /dev/tty47  /dev/tty62      /dev/ttyS18  /dev/ttyS5
/dev/tty17  /dev/tty32  /dev/tty48  /dev/tty63      /dev/ttyS19  /dev/ttyS6
/dev/tty18  /dev/tty33  /dev/tty49  /dev/tty7       /dev/ttyS2   /dev/ttyS7
/dev/tty19  /dev/tty34  /dev/tty5   /dev/tty8       /dev/ttyS20  /dev/ttyS8
/dev/tty2   /dev/tty35  /dev/tty50  /dev/tty9       /dev/ttyS21  /dev/ttyS9
/dev/tty20  /dev/tty36  /dev/tty51  /dev/ttyACM0    /dev/ttyS22
/dev/tty21  /dev/tty37  /dev/tty52  /dev/ttyprintk  /dev/ttyS23
/dev/tty22  /dev/tty38  /dev/tty53  /dev/ttyS0      /dev/ttyS24

I guess it is this one:
/dev/ttyACM0

[dotcypress]

Is this /dev/ttyACM0 disappear when disconnecting Pico?
Also could you try following command: sigrok-cli -d ols:conn=/dev/ttyACM0 --scan?

[darkbox]

Is this /dev/ttyACM0 disappear when disconnecting Pico?

yes

Also could you try following command: sigrok-cli -d ols:conn=/dev/ttyACM0 --scan?

sigrok-cli -d ols:conn=/dev/ttyACM0  --scan
Driver ols not found.

[darkbox]

I've been looking for a solution on the Sigrok web but didn't find anything related.
For what I understood, all the drivers are on share library called libsigrok which looks like is installed already.
This are the packages installed on my system (apt list --installed | grep "sigrok"):

libsigrok4/lunar,now 0.5.2-4 amd64 [installed]
libsigrokcxx4/lunar,now 0.5.2-4 amd64 [installed]
libsigrokdecode4/lunar,now 0.5.3-4 amd64 [installed,automatic]
sigrok-cli/lunar,now 0.7.2-1 amd64 [installed]
sigrok-firmware-fx2lafw/lunar,lunar,now 0.1.7-1 all [installed]
sigrok/lunar,lunar,now 0.3 all [installed]
pulseview/lunar,now 0.4.2-3 amd64 [installed,automatic]

[darkbox]

Update: I've tested it in Windows 10 and works. So maybe there is some problem with the builds of Pulseview for Ubuntu.
Meanwhile I'll use Windows and if I found a solution in the future, I'll post it here.

[Loc15]

I had the same problem on Ubuntu and Manjaro but it works if run pulseview with sudo:
sudo pulseview
The problem is the permission to acces to /dev/ttyACM0. https://stackoverflow.com/questions/49063139/why-do-i-need-to-execute-sudo-chmod-arw-dev-ttyacm0-command-again-after-every

[FathiMahdi]

I have the same issue even with sudo :

sudo sigrok-cli -d ols:conn=/dev/tty.usbmodem_ula_1 --scan
Driver ols not found.

[krayon]

Driver ols not found
This suggests that whilst you do have sigrok-cli and libsigrok installed, the version (or package) you have doesn't support the ols driver.

You can see a list of supported drivers by running:

sigrok-cli --list-supported

---

UPDATE:

Seems to be an Ubuntu bug where libsigrok supports no hardware at all.

If you're brave, you could install the Debian versions as they don't seem to be effected. It should work but I've not tried it as I don't use Ubuntu.