6537

[leosgb]

Hi,

I am trying to acquire some digital samples (2 x 16 bits in one PCIe 6537) using Burst handshake protocol. I have the cable adapter configured as follows:

6537 side          6533 side                  desc.

4                        4                                Clock

1                        6                                Ack

0                        2                                Req

Surprisingly nothing happens when I have my clock (in the VB .NET program) set to PFI4. But when I change it to PFI5 I get an ACK signal on my peripheral.

I noticed that nothing happens in the clock on the peripheral, though.

I wonder if I am supposed to change my cable adapter so that it connects PFI4 from my 6533 side (peripheral) to PFI5 in my 6537side. Is this right?

I have another thread treating of this issue but from the programming side at:

http://forums.ni.com/ni/board/message?board.id=232&message.id=5688&jump=true

Thank you.

---ADDED:

I am not sure how my thread ended up with this meaningless title. It was supposed to be PCIe 6537 configure export clock to read data.

Message Edited by leosgb on 11-30-2007 04:08 PM

[jcarbonell]

Hi leosgb:

The 6537 doesn't support the clock on PFI4 for input (i.e. PFI4 as a clock is supported for only output).  It's not working because your not catching the configuration error or your code is ignoring the configuration error.

Jeff

---

@leosgb wrote:

Hi,

I am trying to acquire some digital samples (2 x 16 bits in one PCIe 6537) using Burst handshake protocol. I have the cable adapter configured as follows:

6537 side          6533 side                  desc.

4                        4                                Clock

1                        6                                Ack

0                        2                                Req

Surprisingly nothing happens when I have my clock (in the VB .NET program) set to PFI4. But when I change it to PFI5 I get an ACK signal on my peripheral.

I noticed that nothing happens in the clock on the peripheral, though.

I wonder if I am supposed to change my cable adapter so that it connects PFI4 from my 6533 side (peripheral) to PFI5 in my 6537side. Is this right?

I have another thread treating of this issue but from the programming side at:

http://forums.ni.com/ni/board/message?board.id=232&message.id=5688&jump=true

Thank you.

---ADDED:

I am not sure how my thread ended up with this meaningless title. It was supposed to be PCIe 6537 configure export clock to read data.

Message Edited by leosgb on 11-30-2007 04:08 PM

---

[Matthew_W]

 Hi Leosgb,

 What jcarbonell said is exactly correct. The clock source can be PFI5, not PFI4. This can be seen in the NI 6536/6537 help here:
 


 What you have described is the 6533 exporting a clock to a PFI, that PFI line is then physically jumpered to PFI-5 on the 6537 side of the connector. . The 6537 sample clock source is set as PFI-5.

 Have a great morning!
 
 Best regards,

 MatthewW
Applications Engineer
 National Instruments
 

 



Message Edited by Matthew W on 12-03-2007 12:09 PM