Using TIC ASIC Features in the NI GPIB/VXI

Hi,
I am trying to utilize a feature detailed in the NI tutorial Triggering With NI-VXI of the TIC ASIC within the NI GPIB/VXI controller in my application. I am trying to generate a simple SYNC trigger (low going pulse) on VXI TTL0, map that trigger to the External connector of the GPIB/VXI (GPIO1) with signal conditioning, specifically - stretch the trigger pulse to one clock cycle Synchronously based on the clock signal applied to the EXT clock input (GPIO 3). I have managed to generate the trigger on VXI TTL0 and map it to GPIO1 with the following string commands:
"MapTrigTrig 0, 41, #b0000;*WAI;SrcTrig 0, 4, 0"
The following command which is supposed to use the EXT Clock behaves identically to the last... I'm not sure it did anything...
"MapTrigTrig 0, 41, #b1000;*WAI;SrcTrig 0, 4, 0"
When I try to tell it to synchronize with the external clock:
"MapTrigTrig 0, 41, #b1001;*WAI;SrcTrig 0, 4, 0"
I lose the trigger mapping all together... It is still on the backplane, but not coming out of GPIO1
And when I try to tell it to do everything I want, Map it to GPIO1, Use External Clock, Sync with Edge of Clock, and Stretch to one Cycle min:
"MapTrigTrig 0, 41, #b1101;*WAI;SrcTrig 0, 4, 0"
I still get nothing out of the mapping, but sourcing the backplane is still working...
Any help with this would be greatly appreciated.
Thank You, Stephen.

Hi,
You can set up the GPIB-VXI/C to be either a Message-Based or a register-Based VXI device. Normally, the GPIB-VXI/C should be a message-Based device. In Register-Based mode, however, the GPIB-VXI/C can reside virtually transparently in the VXI system for use as a debugging tool. It can still access the VXIbus directly as a bus master, perform Word Serial operations and GPIB transactions, and use Code Instruments. None of the functionality is removed; however, the Resource Manager does not grant any Servants to a Register-Based GPIB-VXI/C.
You didn't reply to my question: What is your NI-VXI driver version?
You will have some informations about the configuration of your GPIB-VXI and more details concerning the register-based or message-based used , at the following link: http://www.ni.com/pdf/manuals/320404c.pdf
Message Edité par ManuelR le 11-23-2006 10:56 AM
Manuel R
AE dans une autre vie

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Using TIC ASIC Features in the NI GPIB/VXI

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