BCrou
New Contributor
New ContributorForum Discussion
CheepinC_altera
Regular Contributor
Regular ContributorHi,
As I understand it, your have some inquiries related to loopback mode using TTK. As I checked through the Quartus user guide, seems like I am unable to find the "Reverse serial" loopback mode for the TTK. The information that I found is for serial loopback. Would you mind to share with me the specific Quartus version, A10 device as well as a TTK screenshot? Thank you.
By the way, to avoid any confusion, it is recommended for you to directly write to the specific registers. You may refer to the following sections in the A10 XCVR PHY user guide for further details:
1. Reverse Serial Loopback Mode (Pre-CDR)
2. Reverse Serial Loopback Mode (Post-CDR)
Please let me know if there is any concern. Thank you.
Best regards,
Chee Pin
BCrouNew Contributor
New ContributorHello Chee,
I am using version 18.1 of the Quartus Prime Standard Edition. I have to use the Standard Edition because some aspects of a design I am using do not work with the Pro Edition. I am using an Intel ® Arria10® SoC 10AS066K3F40E2SG. Here is TTK screenshot showing Reverse serial option under Loopback mode:
[cid:image001.jpg@01D568AC.DC971490]
Note that this screenshot also shows the tcl script log for a proc I created called set_reverse_serial_pre_loop_phy that sets the bits for all of the channels to the configuration in the document to which you refer identified as “Pre-CDR”:
[cid:image002.png@01D568AC.DC971490]
And another screenshot showing the printout from a modified version of the status_dump_all proc that adds all the registers shown in the above:
[cid:image003.jpg@01D568AC.DC971490]
Is that the only way to be sure how the Reverse serial loopback is set (Pre or Post-CDR)? Is it possible to know what TTK does?
Bill Croughwell
System Engineer
LUMEOVA
Email: bill.croughwell@lumeova.com
Mobile: 919-308-7051<tel:908-229-4651>
