DS90UB949-Q1EVM: Analog Launchpad software unstable; does not detect hardware correctly

Joshua Dunn55

Part Number: DS90UB949-Q1EVM
Other Parts Discussed in Thread: DS90UB948-Q1EVM, ALP

Hello,

I'm trying to use the Analog Launchpad software along with the serializer/deserializer pair DS90UB949-Q1EVM and DS90UB948-Q1EVM. I'm having the following problems with the software:

1. The software frequently freezes, stops responding, and occasionally even crashes. An error message directs me to the MainGUI.exe.log file, which contains the following information:

Traceback (most recent call last):
File "C:\Program Files (x86)\Texas Instruments\Analog LaunchPAD v1.57.0010\Profiles\FPDL3Base\FPDLink3_GUI.py", line 305, in OnTabSelect
s.tabDispatch[s.currTabTxt]()
File "C:\Program Files (x86)\Texas Instruments\Analog LaunchPAD v1.57.0010\Profiles\FPDL3Base\FPDLink3_GUI.py", line 426, in UpdatePatternGenTab
Selected = s.board.deviceList[0]
IndexError: list index out of range
Traceback (most recent call last):
File "C:\Program Files (x86)\Texas Instruments\Analog LaunchPAD v1.57.0010\Profiles\FPDL3Base\FPDLink3_GUI.py", line 305, in OnTabSelect
s.tabDispatch[s.currTabTxt]()
File "C:\Program Files (x86)\Texas Instruments\Analog LaunchPAD v1.57.0010\Profiles\FPDL3Base\FPDLink3_GUI.py", line 426, in UpdatePatternGenTab
Selected = s.board.deviceList[0]
IndexError: list index out of range

2. The software does not properly detect the EVM hardware. It seems to think I'm connected to a DS90UB925/24 pair.I corrected the problem in the "Devices" task by following the instructions in the EVM datasheet to load the correct profiles for my hardware. However, the Information tab still lists the wrong hardware. For reference, it looks similar to the picture in the linked thread. Following the instructions given in that thread, I switched to demo mode and set it up with the 949 device profile. Here is a screenshot of what that looks like:

Also per those instructions, I tried to find the values of registers F0-F5. The registers tab lists them all as 00, but I'm not convinced this is accurate since every other register I checked also listed its value as 00. The registers tab took a long time to load and nearly crashed the software, so maybe those are just dummy timeout values?

over 6 years ago

0 Vishy Viswanathan over 6 years ago

TI__Mastermind 21685 points

Joshua,

Please check the board jumper settings and power connection. We have seen ALP connection issues when board is incorrectly powered or not powered at all. Could you upload a picture of the board? I can also double check.

Thanks,
Vishy

0 Joshua Dunn55 over 6 years ago in reply to Vishy Viswanathan

Intellectual 460 points

Hi Vishy,

Here's a picture of the board. I went through the datasheet when I was setting the board up and I thought I followed all the directions for the jumper settings, but it's certainly possible I missed something.

Thanks,

Josh

0 Joshua Dunn55 over 6 years ago in reply to Joshua Dunn55

Intellectual 460 points

UPDATE: After looking back through the datasheet, it seems Jumper 41 was set incorrectly. Moving the bridge from 1-2 to 2-3 took care of a lot of the instability in the software. The GUI now detects the 949 properly in the information tab. However, it still lists the partner board as a 926 (see below):

0 Vishy Viswanathan over 6 years ago in reply to Joshua Dunn55

TI__Mastermind 21685 points

Joshua,

Thanks for checking and updating. For the deserializer partner information to update you have to connect Ux948EVM to the Ux949EVM by STP cable. See user guide section 1.15. Is it already connected?

Thanks,

Vishy

0 Joshua Dunn55 over 6 years ago in reply to Vishy Viswanathan

Intellectual 460 points

Hi Vishy,

The boards are connected through the secondary FPD-Link III connectors using 4 coaxial cables, since we had trouble sourcing a proper cable to mate with the Rosenberger connectors. Is it possible there are special jumper settings that are needed to switch to these connectors?

Thanks,

Josh Dunn

0 Vishy Viswanathan over 6 years ago in reply to Joshua Dunn55

TI__Mastermind 21685 points

Josh,

For SMA some resistors need to be populated. See schematic below

Thanks,

Vishy

0 Joshua Dunn55 over 6 years ago in reply to Vishy Viswanathan

Intellectual 460 points

Hi Vishy,

Are there similar resistors which need to be populated on the deserializer board? Are these resistors just 0 ohm bridges or do they need to have specific values?

Thanks,
Josh Dunn

0 Vishy Viswanathan over 6 years ago in reply to Joshua Dunn55

TI__Mastermind 21685 points

Josh,

Termination resistors (R109, R112, R114, R118) should be 50ohm. Others are 0ohm bridges. I gave the schematic snippet from User Guide. There's also a BOM table in the user guide you can double check against.

I quickly checked 948EVM user guide. Yes, in 948EVM also there are such resistors to switch from STP to coax.

Thanks,
Vishy

0 Joshua Dunn55 over 6 years ago in reply to Vishy Viswanathan

Intellectual 460 points

Hi Vishy,

I see. Well, we will work on sourcing an STP cable. We'd like to avoid having to modify the boards at all. In any case, the software works when communicating with the 949, but I think I'm having another jumper issue with the 948 board. Here is a photo of the board (I think all the switches are set properly, and I didn't see any information in the datasheet about jumper settings, but it's always possible I missed something):

Just like with the 949, the software is sluggish and doesn't recognize the board properly in the info screen:

Please let me know if anything on the board looks amiss.

Thanks,

Josh Dunn

0 Vishy Viswanathan over 6 years ago in reply to Joshua Dunn55

TI__Mastermind 21685 points

Josh,

Looks like S3 switch inputs are reversed:
1 and 2 inputs should be low
3 should be high

Now 1 and 2 are high and 3 (PDB) is low. If PDB is low, device won't connect. Please check.

Thanks,
Vishy

0 Joshua Dunn55 over 6 years ago in reply to Vishy Viswanathan

Intellectual 460 points

Hi Vishy,

This solved the problem. Thank you very much for all the help!

Josh Dunn

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DS90UB949-Q1EVM: Analog Launchpad software unstable; does not detect hardware correctly