- From: Hugh Gibson <hgibson_at_cfa.harvard.edu>
- Date: Tue, 18 Mar 2003 21:09:00 -0500 (EST)
I am using streaming Analogue Input, similar to cmd.c very successfully. However, I need to synchronise some external electronics to the data-taking and I therefore need a synchronising signal. All the PFI lines associated with Analogue Input seem to be permanently tri-state and float high (PF0,PF1,PF2). I understand these lines can show the state of the internal logic if they are configured to be outputs? The AI_Output_Control_Register (0x60) is set to 0x32e in ni_ai_reset which I think should set the convert line to active low. However, all seems to be permanently tri-state. Am I missing something? I think I can code around this, by making the trigger source external, and synchronising the AI data-taking to the external source, but I would prefer to synch up the external electronics to the DAQ card. Any hints would be appreciated, Thanks, Hugh hgibson_at_cfa.harvard.edu
Received on 2003-03-19Z02:09:00