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wjasper / Linux_Drivers

Open source Linux device drivers
GNU General Public License v3.0
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Support for USB-1408FS-Plus #25

Closed anand97 closed 5 years ago

anand97 commented 5 years ago

Support for USB-1408FS Plus is mentioned, but the corresponding test file doesn't exist. The test file for USB-1408FS doesn't seem to recognise the device.

wjasper commented 5 years ago

The usb-1408FS-Plus and the usb-1208FS-Plus are very similar. Use the file test-usb1208FS-Plus to test out your device.

mazerj commented 5 years ago

This is a bit off the original question, but I was wondering if anybody who's used the MC USB devices with comedi might have an idea of the lag on these devices if they're used in a polling mode (e.g., using comedi_data_read)? I know this is not the right way to sample, but I'm dealing with a legacy app situation, where the incoming data needs to be timestamped to the host computer's clock (within 1ms) and can't easily be done with a triggering or sync pulse. The way my app does it now is to poll and timestamp a das1602 in a tight loop, which, although ugly, works reasonably well for 1khz sampling. I'd like to switch to a USB device for various reasons, but have never found a good way to sync the incoming data stream to the cpu clock... Thanks Jamie

On Sun, Apr 14, 2019 at 6:17 AM Warren Jasper notifications@github.com wrote:

The usb-1408FS-Plus and the usb-1208FS-Plus are very similar. Use the file test-usb1208FS-Plus to test out your device.

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-- James Mazer Department of Cell Biology & Neuroscience Montana State University, Bozeman, MT james.mazer@montana.edu 406-994-5947 http://kernel.montana.edu

cboulay commented 5 years ago

Hi Jamie,

For sync'ing data streams I use labstreaminglayer (LSL). I created a LSL app for the 1608FS about 4 years ago. I needed something cross platform so I came up with some hybrid between Warren Jasper's drivers (from 4 years ago) and the official drivers. It worked at the time but I'm sure it has since rotted. Last year I started to look at the MCC-UniversalLibrary interface but the project requirements changed so I abandoned it (branch is still there though).