Hobby Components USB 8CH 24MHz Logic Analyser (HCTEST0006)

Test equipments and accessories
AntalVincz
Posts: 2
Joined: Tue Jul 12, 2016 7:54 am

Re: Hobby Components USB 8CH 24MHz Logic Analyser (HCTEST000

Post by AntalVincz » Tue Jul 12, 2016 3:24 pm

Hi Andrew,

I downloaded again, but doesn't work.
We try some computer.

Do you send me on email?

av (at) clarioncomms.com

Thank you.

andrew
Site Admin
Posts: 804
Joined: Sun Aug 05, 2012 4:15 pm

Re: Hobby Components USB 8CH 24MHz Logic Analyser (HCTEST000

Post by andrew » Wed Jul 13, 2016 7:50 am

From your PM I believe you have resolved the problem.
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RedEyer
Posts: 3
Joined: Tue Aug 09, 2016 6:39 pm

Re: Hobby Components USB 8CH 24MHz Logic Analyser (HCTEST000

Post by RedEyer » Tue Aug 09, 2016 6:48 pm

Hello guys,

I have this device, but there are 3.3V and 0.4 mA on all 8 channels, and this current influences on my measurements (I can't analyze I2C protocol).

Is it normal?
And
Could anybody measure channels output voltage and current?

Thanks!

andrew
Site Admin
Posts: 804
Joined: Sun Aug 05, 2012 4:15 pm

Re: Hobby Components USB 8CH 24MHz Logic Analyser (HCTEST000

Post by andrew » Wed Aug 10, 2016 8:57 am

The analyser uses a 74HC245 as buffer to the input pins. This is powered from a 3.3V supply but there are some resistors between this buffer and the pins so that it be used with 5V logic. These resistors are quite low in value so there will also be some loading of a few mA when connected to 5V logic and you should expect to see ~3.3V at the pins when left floating.

If the loading effect is pulling your I2C bus low you could try adding some external resistors in series with the logic analysers inputs. I'd start at about 10K. Alternatively you may want to check that you do have external pull-ups on your I2C bus and that they are the correct value.
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RedEyer
Posts: 3
Joined: Tue Aug 09, 2016 6:39 pm

Re: Hobby Components USB 8CH 24MHz Logic Analyser (HCTEST000

Post by RedEyer » Wed Aug 10, 2016 3:46 pm

Thanks andrew!
It is strange, I thought that device should work from the box. Maybe I should to change channel resistors in this device?

andrew
Site Admin
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Joined: Sun Aug 05, 2012 4:15 pm

Re: Hobby Components USB 8CH 24MHz Logic Analyser (HCTEST000

Post by andrew » Thu Aug 11, 2016 8:29 am

Yes, it's not an issue I've seen myself with I2C because at worst case it should only pull the signal down to >3.3V. The device(s) on your I2C bus are must not like this. Changing the resistors is certainly one option if you're comfortable with desoldering/soldering surface mount resistors but they are in 4 way resistor packs, not single resistors. Also I would strongly recommend testing it with external resistors first to determine a value that works with your setup.
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ast8346
Posts: 1
Joined: Sun Aug 28, 2016 6:14 pm

Re: Hobby Components USB 8CH 24MHz Logic Analyser (HCTEST000

Post by ast8346 » Sun Aug 28, 2016 6:35 pm

Hello,
I have got the same problem as the person I have quoted below.
The device comes up with VID 0925 and PID 3881
I understand that was some batch error. Could you please email me instructions about how to fix this issue? ast8346@yandex.ru
Thanks
MartynHill wrote:Thank you Andrew!

The instructions and links to latest downloads you sent via PM has done the trick with this device - re-flashed with the FX2 image.

After all my previous messing about, I had to dig-deep in to Windows to expunge the previous driver files and associated INF files before the final step of loading the FX2 drivers would succeed and then allow PulseView to recognise the device - which now appears as 'Cypress FX2' in the analyser.

That was fun - thanks again!

Terrific support and service - for what is unlikely to be a particularly profitable sale for HC!

I'll make sure to rate that in my eBay feedback :-)

Happy weekend!
M.

andrew
Site Admin
Posts: 804
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Re: Hobby Components USB 8CH 24MHz Logic Analyser (HCTEST000

Post by andrew » Tue Aug 30, 2016 8:48 am

Sorry about that. I've just replied to your email with a solution.
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Anthony
Posts: 3
Joined: Wed Oct 26, 2016 1:52 am

Re: Hobby Components USB 8CH 24MHz Logic Analyser (HCTEST000

Post by Anthony » Wed Oct 26, 2016 2:23 am

I've installed the distro's package of sigrok on Linux Mint 17.3 Rosa and the OS sees the logic analyser but sigrok-cli doesn't.

Has anyone had success with Mint (an Ubuntu derivative) or got any idea what I could try or how to investigate further?

Thanks

# see if the logic analyser has been detected when plugged in
$ dmesg | grep 'device number' | tail -1
[932081.928113] usb 1-3: new high-speed USB device number 19 using ehci-pci
$ lsusb -s 19
Bus 001 Device 019: ID 1d50:608c OpenMoko, Inc.

$ sigrok-cli --scan
The following devices were found:
demo - Demo device with 8 probes: 0 1 2 3 4 5 6 7
alsa - ALSA: Intel 82801DB-ICH4 Intel 82801DB-ICH4 with 2 probes: Ch_0 Ch_1
alsa - ALSA: Intel 82801DB-ICH4 Intel 82801DB-ICH4 - MIC ADC with 2 probes: Ch_0 Ch_1
alsa - ALSA: Intel 82801DB-ICH4 Intel 82801DB-ICH4 - MIC2 ADC with 2 probes: Ch_0 Ch_1
alsa - ALSA: Intel 82801DB-ICH4 Intel 82801DB-ICH4 - ADC2 with 2 probes: Ch_0 Ch_1

Web search started with the advice here
https://sigrok.org/wiki/Building#Cannot ... her_device

Lastly I checked that the installation looked complete and has the correct version of udev rules

$ find /usr /etc -name '*sigrok*' | xargs ls -ld # check installation is complete
-rw-r--r-- 1 root root 8385 Oct 24 04:46 /etc/udev/rules.d/z60_libsigrok.rules.txt
-rwxr-xr-x 1 root root 39544 Sep 8 2013 /usr/bin/sigrok-cli
lrwxrwxrwx 1 root root 24 Mar 6 2014 /usr/lib/libsigrokdecode.so.1 -> libsigrokdecode.so.1.0.0
-rw-r--r-- 1 root root 35124 Mar 6 2014 /usr/lib/libsigrokdecode.so.1.0.0
lrwxrwxrwx 1 root root 18 Mar 6 2014 /usr/lib/libsigrok.so.1 -> libsigrok.so.1.0.0
-rw-r--r-- 1 root root 310948 Mar 6 2014 /usr/lib/libsigrok.so.1.0.0
drwxr-xrwx 2 root root 4096 Oct 24 04:24 /usr/local/share/sigrok-firmware
-rw-r--r-- 1 root root 8120 Nov 27 2015 /usr/local/share/sigrok-firmware/fx2lafw-sigrok-fx2-16ch.fw
-rw-r--r-- 1 root root 8120 Nov 27 2015 /usr/local/share/sigrok-firmware/fx2lafw-sigrok-fx2-8ch.fw
drwxr-xr-x 3 root root 4096 Oct 24 02:03 /usr/share/libsigrokdecode

$ find /lib /usr -name '*libusb*' | xargs ls -ld
-rw-r--r-- 1 root root 1790 Mar 2 2014 /lib/firmware/carl9170fw/extra/libusb-zeropacket.diff
lrwxrwxrwx 1 root root 19 Feb 4 2016 /lib/i386-linux-gnu/libusb-0.1.so.4 -> libusb-0.1.so.4.4.4
-rw-r--r-- 1 root root 30100 Dec 3 2013 /lib/i386-linux-gnu/libusb-0.1.so.4.4.4
lrwxrwxrwx 1 root root 19 Feb 4 2016 /lib/i386-linux-gnu/libusb-1.0.so.0 -> libusb-1.0.so.0.1.0
-rw-r--r-- 1 root root 91856 Dec 11 2013 /lib/i386-linux-gnu/libusb-1.0.so.0.1.0
-rw-r--r-- 1 root root 26140 Oct 21 2013 /usr/lib/libusbmuxd.so.1.0.8
lrwxrwxrwx 1 root root 19 Feb 4 2016 /usr/lib/libusbmuxd.so.2 -> libusbmuxd.so.1.0.8

$ grep 'sigrok FX2 LA (8ch)' /etc/udev/rules.d/z60_libsigrok.rules.txt # check file version
# sigrok FX2 LA (8ch)

Anthony
Posts: 3
Joined: Wed Oct 26, 2016 1:52 am

Re: Hobby Components USB 8CH 24MHz Logic Analyser (HCTEST000

Post by Anthony » Wed Oct 26, 2016 10:32 pm

$ sigrok-cli -V
sigrok-cli 0.4.0
Using libsigrok 0.2.0 (lib version 1:0:0).
Using libsigrokdecode 0.2.0 (lib version 1:0:0).

$ sigrok-cli --driver=fx2lafw:conn=1d50.608c --samples 8
No devices found.

$ sigrok-cli --driver=demo --samples 8 -p 1
libsigrok 0.2.0
Acquisition with 1/8 probes at 200 kHz
1:01110111

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