Gordon, Thanks for your quick response. Being quite bloody minded about he whole deal I'm interested in developing a Device Interface that will act as a dedicated device driver for the 6008. I understand that I can write a CoreAudio compliant USB device interface for the Mac but I'm just a little uncertain where to start really. I have all the example code from NI with the header file for DAQ so I guess I must have enough ingredients to make the cake with.... Just don't have the recipe yet haha.
I would value your opinion as to how to get started. The reason I am looking to use SignalScope and a multi IO is that I am putting together a watch/clock timing device.... I don't want to spend the >£1k on a bought one when I'm not likely to use it enough.... I'm quite happy putting something together that I'm happy with. I intend to use on analog input for the mic pickup on the clock or watch and another input I intend to connect some kind of timing device.... Probably a 555 chip with a low volt "blip" which I can set to between 1Hz and 10Hz. The intention then is to overlay both input signals and compare in SignalScope..... Misalignment between the two traces indicating bad regulation. As a result I'm not really looking for a high spec ADC/USB device since I'm not trying to bring in a full audio spectrum... If you see what I mean? Thanks again for the response. Hope you can get me started in the right direction! Best regards Andrew Sent from my iPad > On 5 Jan 2015, at 21:17, Gordon Rankin <[email protected]> wrote: > > Andrew, > > I use Ben Fabers stuff all the time. It requires that the device be Audio > compliant. Meaning it should show up in the System Preferences as an Audio > Input/Output device or in the Audio Midi settings. > > You would be better off using an nice audio ADC converter. Depending on your > needs I could send you some that I have worked on. > > Thanks, > Gordon > >> On 1/5/15, 3:00 PM, [email protected] wrote: >> >> ---------------------------------------------------------------------- >> >> Message: 1 >> Date: Mon, 05 Jan 2015 10:19:14 +0000 >> From: Andrew Glassby <[email protected]> >> To: [email protected] >> Subject: National Instruments USB Device not showing in list of >> available devices >> Message-ID: <[email protected]> >> Content-Type: text/plain; charset=utf-8 >> >> Hi all, >> >> This is a bit of a pre-emptive email while I try to contact National >> Instruments. I have a USB-6008 multi I/O USB device; Supplies 8 of analog >> I/O or 8 of digital I/O. If I plug the device in I can see that Mac OS X >> (10.10) picks it up from the system report. Unfortunately when I try to >> access this device from Faber Acoustics SignalScope the option to use it as >> an input device doesn’t show. I have used the generic apps supplied with the >> device from NI and these work But I guess they are working directly with the >> device rather than through a Device Interface. >> >> I’m trying to understand how to develop a USB device interface but the >> documentation isn’t the most obvious source of information. What I want to >> do with this device is to take two analog inputs (essentially audio pickups) >> and trace them using Faber’s SignalScope. I believe that I should be writing >> a USB Device Interface so that it shows up in SignalScopes Input device >> list??? If not I would appreciate a redirection. If my logic IS correct >> where do I start?? >> >> I have looked at the USB PlugIn sample from Apple but I don’t understand how >> you expose the device correctly. By simply adding the Product and Device >> ID’s (taken from the system report) does this mean that all the USB device >> is exposed?? I’m thinking not… so How do I do this? NI supply some >> rudimentary access code written in C/C++ with the device. Should I be >> looking to use the access functions from this code in the Device Interface >> code? >> >> Hope this isn’t too basic a set of questions!! >> >> Kindest Regards >> >> Andrew >> >> >> ------------------------------ >> >> _______________________________________________ >> Usb mailing list >> [email protected] >> https://lists.apple.com/mailman/listinfo/usb >> >> End of Usb Digest, Vol 12, Issue 1 >> ********************************** > _______________________________________________ Do not post admin requests to the list. They will be ignored. Usb mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/usb/archive%40mail-archive.com This email sent to [email protected]
