PCI Based RIO cards synchronization

[natarajan.ramasamy@honeywell.com]

Hi,

I have two PCI based 7833R cards with me. I would like to synchronize both the cards analog inputs with microseconds accuracy.could any of you please suggest me what is the best way for synchronizing both the PCI cards analog inputs?

Early responce will be very much appreciated.

-Nataraj.

[Shreyas]

Hi,

You might have a look at this 

Let me know if this helps!

[orelb]

Hi.

I've read the link you've posted, but still can't find any way to synchronize two PCI-7833R cards using the RTSI cable.

I know how to make the master FPGA generate a pulse train and send it over one of the RTSI channels, but aside from triggering the slave and letting it run on its own clock, is there a way to synchronize both clocks?

Any help would be appreciated.

Thanks.

[natarajan.ramasamy@honeywell.com · Accepted solution]

Hello,

 RIOCards Synchronization:

In my Application,

• Available FPGA Cards: 7833R (1) and 7833R (2)

• Card1 will act as a master and card2 will act as a slave.

• 1 Sec continuous square pulse will be generated from master card and the same will be fed to another digital input of same card as well slave card.

Channel connection details for Synchronizing two FPGA cards:

Card1 (Box1) DIO1 should be connected to Card1 DIO2 (Box 1)

Card1 (Box1) DIO1 should be connected to Card2 DIO1 (Box2)

• Rising edge of the square pulse will be detected in both the cards. The moment rising edge detected, acquisition will be started in both the cards.

• Every one minute rising edge will be detected in both the cards for synchronization, then acquisition will be started.

Hope it helps!

Regards,

Natarajan.

[orelb]

Thanks for the quick reply...

Can you please post some kind of an example for me?  It would really help me to see something visual.

Thanks again!

[orelb]

If I understand your method correctly, there is always an 80 MHz jitter between the two cards...

Correct?