Thread: PWM signals from computer?
View Single Post
  #5   Spotlight this post!  
Unread 30-07-2009, 15:39
Russ Beavis Russ Beavis is offline
Registered User
no team
  
Join Date: Nov 2005
Location: Manchester, NH - DEKA R&D Corp.
Posts: 341
Russ Beavis has a reputation beyond reputeRuss Beavis has a reputation beyond reputeRuss Beavis has a reputation beyond reputeRuss Beavis has a reputation beyond reputeRuss Beavis has a reputation beyond reputeRuss Beavis has a reputation beyond reputeRuss Beavis has a reputation beyond reputeRuss Beavis has a reputation beyond reputeRuss Beavis has a reputation beyond reputeRuss Beavis has a reputation beyond reputeRuss Beavis has a reputation beyond repute
Re: PWM signals from computer?
The 37-pin interface on the digital sidecar isn't related in any direct way to the 25-pin parallel port on a PC. The 10 PWM outputs from the DSC are "bit-banged" from the digital output module in the cRIO. The DSC is only present to buffer the cRIO's outputs and thereby provide additional current. Using the DSC would help if you can bit-bang the parallel port outputs with resolution in the 10s of microseconds or better (but I don't think that you can reliably twiddle those bits as needed).

Russ