# Logic 2.3.19 Does USB LS and FS work at all? **URL:** \ **Category:** Logic 2 Software\ **Created:** [February 26, 2021, 1:54pm UTC](https://discuss.saleae.com/t/logic-2-3-19-does-usb-ls-and-fs-work-at-all/931 "2021-02-26T13:54:35Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![KurtE](https://yyz2.discourse-cdn.com/flex030/user_avatar/discuss.saleae.com/kurte/32/189_2.png) [@KurtE](https://discuss.saleae.com/u/KurtE)\ **Post date:** [February 26, 2021, 1:54pm UTC](https://discuss.saleae.com/t/logic-2-3-19-does-usb-ls-and-fs-work-at-all/931/1 "2021-02-26T13:54:36Z")
I thought I would try a quick capture to see how hard it might be to modify the USB LS and FS analyzer to maybe have a new decode level - like Packet with Data… But first thought I would try a capture with current release and I am a bit rusty so don’t remember which is the D+ versus D- but I tried both ways… So far the analyzer that is part of the build is not analyzing anything. It sits at 0% and if I try different settings it always just shows RESET only at start like: ![screenshot](https://canada1.discourse-cdn.com/flex030/uploads/saleae/original/1X/2b049af94cc4e8d2c5a036765cf2afcbb1f693e8.jpeg) So wondering if it is working at all with current build? Here is a partial capture. [USB\_Mouse\_startup.sal](https://discuss.saleae.com/uploads/short-url/rmw4lOYqOxCgbapHHbty22Ht13q.sal) (26.6 KB) Now back to playing. Note: What I wanted to really capture was the startup of a thumb drive, but as expected it is running at the 480mhz and nothing shows up in the analyzer. ---
**Author:** ![timreyes](https://yyz2.discourse-cdn.com/flex030/user_avatar/discuss.saleae.com/timreyes/32/108_2.png) [@timreyes](https://discuss.saleae.com/u/timreyes)\ **Post date:** [February 27, 2021, 12:20am UTC](https://discuss.saleae.com/t/logic-2-3-19-does-usb-ls-and-fs-work-at-all/931/2 "2021-02-27T00:20:21Z")
@KurtE The usb analyzer in your capture might have had the incorrect speed setting. Setting to 1.5Mbps solved it for me. Can you double check that? ![Screen Shot 2021-02-26 at 3.20.04 PM](https://canada1.discourse-cdn.com/flex030/uploads/saleae/original/1X/af00aaee5b160c906fce7411605dd74384e7f4a0.png) Here is the updated capture file: [updated-USB\_Mouse\_startup.sal](https://discuss.saleae.com/uploads/short-url/jx83Q3gMm4nHMzUEP9ZAsy0ncAl.sal) (24.1 KB) ---
**Author:** ![markgarrison](https://yyz2.discourse-cdn.com/flex030/user_avatar/discuss.saleae.com/markgarrison/32/23_2.png) [@markgarrison](https://discuss.saleae.com/u/markgarrison)\ **Post date:** [February 27, 2021, 1:47am UTC](https://discuss.saleae.com/t/logic-2-3-19-does-usb-ls-and-fs-work-at-all/931/3 "2021-02-27T01:47:55Z")
> [@KurtE](#): > > Now back to playing. Note: What I wanted to really capture was the startup of a thumb drive, but as expected it is running at the 480mhz and nothing shows up in the analyzer. Kurt, one thing we’ve done in the past is to plug a USB 2.0 high speed device into a USB 1.1 hub. They can be hard to find though. I think we picked one up off of Amazon 5-8 years ago. ---
**Author:** ![KurtE](https://yyz2.discourse-cdn.com/flex030/user_avatar/discuss.saleae.com/kurte/32/189_2.png) [@KurtE](https://discuss.saleae.com/u/KurtE)\ **Post date:** [February 27, 2021, 12:47pm UTC](https://discuss.saleae.com/t/logic-2-3-19-does-usb-ls-and-fs-work-at-all/931/4 "2021-02-27T12:47:17Z")
Thanks, it is working. I actually started off yesterday with low speed, but for some reason it would not detect it properly… Not sure why… I tried all 4 combinations of Speed and which pin is + and - Maybe it was just having an off day. Also good idea of trying to go through a slow hub. Which is an interesting point of wondering what the HUB is I am testing on the T4.1 with USB thumb drives… Thanks again