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Picozed SDR Development Board not powering up

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44 posts / 0 new
farhan
Junior(0)
Picozed SDR Development Board not powering up

Hi there
I have just received my Picozed SDR SOM Development Kit. I have followed the quick start guide but the SOM is simply not powering up. Only one red LED DS8 turns on when i switch the board on and then nothing further. Plz help guys it is urgent. Thnx in advance

farhan
Junior(0)
Ok guys further investigation

Ok guys further investigation reveals that the SOM requires power enable signal (apparently active high as per SOM doc) to turn on but my carrier board pulls it down as soon as i turn on the power and it remains like that afterwards. why is it like this plz help guys

thermalpilot
Junior(0)
Only DS8 led lit.

My freshly on-boxed Picozed SD SOM Development Kit exhibits the identical DS8 led lit condition.

mbrown
Moderator(7)
Working on it today!

Gentlemen,
 
Sorry to hear you're having trouble.  We're working on understanding this issue today.
DS8 on the PZSDRCC-FMC board indicates that it is successfully generates 5.0V, which is used to power the SOM (VIN).
Each PZSDRCC-FMC board is tested at the manufacturer, so I don't suspect you have bad carrier cards. 
Our theory is that the firmware in the ADM1166 located on the AES-7ZPZ-SDR2-G SOM is programmed with a threshold for the VIN voltage that is too tight.  If the ADM1166 doesn't see a valid VIN voltage, the SOM will not power up.  We suspect this is what you are experiencing.
 
We'll continue working on it and I will provide an update first thing in the morning.
 
Thanks,
/Matt

farhan
Junior(0)
ok correction board is giving

ok correction board is giving logic high on power en to SOM but nothing further is happening the no other LED on SOM or the carrier board is turning on guys. plzz help

farhan
Junior(0)
i also have the same theory

i also have the same theory because TP2 on the SOM is reading 4.96V but power good led DS3 on SOM is not lighting up indicating that power supervisory IC is not completing its sequence. plz help me with this issue i am looking for a solution urgently. do i have to RMA the board ?

mbrown
Moderator(7)
Root cause found

We found the root cause.  It is *not* faulty hardware. 
 
As we suspected, the threshold check of the voltage "VH" programmed into the ADM1166 (power sequencer) on the SOM was too tight.  VH is the first check performed by the ADM1166.  Therefore on some hardware combinations the SOM doesn't power up because the VIN voltage falls below the threshold (only by 10mV or so).
 
The ADM1166 I2C lines connect directly to the Zynq device and therefore can be reprogrammed from software.  We are working on that software now and will publish it ASAP (target =Monday 2/29 ).
 
Thank you for your patience and sorry for the inconvenience. 
 
Farhan -- I will contact you via private message to see if you need an interim fix today.
 
Thanks,
Matt

farhan
Junior(0)
still waiting for solution

still waiting for solution guys

mbrown
Moderator(7)
SW Update Complete

We have the software update for the ADM1166 ready.  It will be included in our next production build of SOMs.
 
For those experiencing this issue now, I will private message each of you with instructions to update your SOM or return it for a replacement.
 
Thanks again for your patience!
/Matt

mdagostino
Junior(0)
No power to SOM

Matt,
I am also experiencing this issue, can you pm me the instructions please.
Mark

pdaderko
Junior(6)
I too am having the DS8 LED

I too am having the DS8 LED only problem on my board. Can you please send me the instructions for updating the SOM?

Thanks,
Pat

pdaderko
Junior(6)
Hmm... maybe I don't have the

Hmm... maybe I don't have the same problem?

A co-worker had another dev kit, so I borrowed his FMC Carrier Card, and my module booted right up on it. Thinking maybe there's a slight power difference between our carriers, I updated the ADM1166 on my SOM while connected to his carrier (following the command line instructions from: https://wiki.analog.com/resources/eval/user-guides/pzsdr/power-and-seque... ). Everything looked to be successful (said: "Successfully reprogrammed the ADM1166 EEPROM. ... reboot the board to load the new configuration."). Rebooting on his carrier worked fine, but I still have the same DS8 only LED on my carrier.

I assume this ADM1166 update is on Github? Do I have a defective carrier card?

Thanks,
Pat

mgrando
Junior(0)
I have the same problem

I have the exact same problem with my board. I woul dlike to send it back for replacement. What informaiton do you need?

mbrown
Moderator(7)
Hi Mark.  Will do. /Matt

Hi Mark.  Will do.
/Matt

tarikkazaz
Junior(0)
Could you PM me too - Same issue

I am having same issue.

tarikkazaz
Junior(0)
Same issue

Hi,

I am having exactly same issue.

mbrown
Moderator(7)
Will do tarikkazaz

Will do tarikkazaz
/Matt

maxb326
Junior(0)
Same issue

hello,
I just plugged my card today and i think I have the same issue. Could someone help me ?
Maxime

maxb326
Junior(0)
Same issue

Nevermind my card is working now

saketh
Junior(0)
HDMI not working but able to boot using UART

I was able to boot the Picozed SDR development kit over UART and view the linux boot in the terminal but unable to view the Linux display in my monitor using HDMI port.What are the possible reasons for this ?

mbrown
Moderator(7)
Do you have a mouse/keyboard

Do you have a mouse/keyboard connected to the USB2.0 OTG port on the carrier as described in the Quick Start Card?
 
Do you have the USB2.0 OTG Vbus jumper set as shown in the Quick Start Card?
 
Often you'll need to provide activity (wiggle the mouse) on the USB2.0 port just after Linux boots in order to wake up the Ubuntu desktop screen saver.
 
/Matt

saketh
Junior(0)
Yes, I have a USB hub

Yes, I have a USB hub connected to USB2.0 OTG port on the carrier to which i have connected the mouse and keyboard. I have followed the quick start guide and set the Vbus jumper and the boot mode to SD card and it is booting fine through UART to my PC, but am unable to get the display using HDMI interface.

mbrown
Moderator(7)
Okay, this is strange.  Let's

Okay, this is strange.  Let's determine the software version you have. 
 
Please insert the SD card into your PC, open the file "Version" in a text editor, and let me know what version is listed.
 
Thanks,
Matt

saketh
Junior(0)
It is "boot_2015_r1_2015_12

It is "boot_2015_r1_2015_12_22".

mbrown
Moderator(7)
Thanks for checking.  That

Thanks for checking.  That checks out.
 
Other things you might confirm:
- is the USB hub functioning?
- does your monitor support 1080p?  See this post on ez.analog.com

saketh
Junior(0)
No issues with Hub and Monitor

Thanks for the support Mr Brown. Yes,the Hub is functioning fine and the monitor which is being used supports 1080p. I tried a different monitor aswell. I have gone through the post which was of little help only. Any insights into solving the issue will be highly appreciated.

mbrown
Moderator(7)
Any progress?

Any progress?

mbrown
Moderator(7)
Check HEAC_N signal (DS1 LED)

On your carrier card, the LED DS1 (located near the HDMI connector)  indicates the presence of an attached HDMI monitor.
Is yours lit when you attach your monitor?
 
/Matt

saketh
Junior(0)
DS1 LED - Red and Blinking

Yes the DS1 LED is lit when connected to the monitor. The LED is red and is blinking every 10 secs.

mbrown
Moderator(7)
Thanks for the extra detail. 

Thanks for the extra detail.  It really sounds as though it's something with your monitors.  Are they the same brand? 
 
I'm using Acer monitors, though we see the kit working with a wide variety of monitors from mainstream vendors.  With my Acer monitor, which has a built-in switch to choose HDMI vs DVI inputs, I notice that DS1 on the carrier briefly blinks off then back on when switching between inputs on my monitor.
 
Your scenario seems to indicate that the ADV7511 on the carrier sees a connected monitor and illuminates DS1.  Then, for some reason, the presence detect signal goes away causing the ADV7511 to turn off DS1. Perhaps your monitor isn't recognizing a supported resolution and is cycling through it's alternate inputs?
 
/Matt
 
 

pdaderko
Junior(6)
Any idea why my SOM boots

Any idea why my SOM boots fine on one FMC carrier card, but only lights DS8 on another? Defective carrier, ADM1166 problem, something else? Any suggestions of what I can check to troubleshoot it?

Thanks,
Pat

mbrown
Moderator(7)
Run ADM1166 update script

The ADM1166 firmware needs an update.  Just plug the SOM onto the carrier that allows it to power up.  Then follow the update instructions posted here:
https://wiki.analog.com/resources/eval/user-guides/pzsdr/power-and-seque...
Programming the ADM1166 Power Sequencer - Using Linux or Hyperterminal Program
 
/Matt

pdaderko
Junior(6)
Thanks for the reply...

Thanks for the reply... unfortunately, I tried the update, but it didn't seem to make any difference (I posted a couple replies a few days ago, but it looks like they got buried further up in the thread).

After doing the update, everything looked to be successful (it said: "Successfully reprogrammed the ADM1166 EEPROM. ... reboot the board to load the new configuration."). But it still only worked on the one carrier.

I did notice on the one that isn't working, the green LEDs on the SOM flash very briefly (then turn off, and only DS8 stays illuminated). Does that mean the ADM1166 tried to start up, and then shut down due to a fault?

Thanks,
Pat

Charly_k
Junior(0)
Answer to Pat's question.

Hi Pat,
Can you check the voltage level at pin 1 and 2 of D1 (on the SOM) If the ADM1166 sees the right voltage on pin 2 (3.8<VH<4.8) it should pull pin 30 of U7 (VIN_EN) high to 12V. That will happen in the ADM1166 is programmed properly.
Charly

Charly_k
Junior(0)
Are you still having the same issue?

Hi Farhan,
Can you check the voltage level at pin 1 and 2 of D1 (on the SOM) If the ADM1166 sees the right voltage on pin 2 (3.8<VH<4.8) it should pull pin 30 of U7 (VIN_EN) high to 12V. That will happen in the ADM1166 is programmed properly.
Charly

pdaderko
Junior(6)
Hi Charly,

Hi Charly,

Thanks for the reply... unfortunately, D1 is on the bottom of the module, which is difficult to probe. But I did test at pin 10 (VH), and have 4.65V, and checked pin 30, and have 11.99V. But, the board isn't powering up (LEDs D3 and D4 on the SOM flash very briefly).

Anything else I should check?

Thanks,
Pat

Charly_k
Junior(0)
Is that the same voltage you

Is that the same voltage you read if you used the Carrier board that works?

Also if you can, you need to go through all the voltages that are coming to the ADM1166 to make sure they are all in the right range.

Looking at the schematic you should see the voltages that are monitored and in what order:
https://wiki.analog.com/resources/eval/user-guides/pzsdr/power-and-seque...

At this point, it doesn't make sense that one carrier works fine and the other doesn't. Unless the sequencer is not programmed right.

Charly

Charly_k
Junior(0)
Also maybe you can reprogram

Also maybe you can reprogram the ADM1166 using the latest files from Github which our engineer just cleaned up the page and posted the latest.

Charly

pdaderko
Junior(6)
The voltage on the working

The voltage on the working carrier board was 4.60V, so slightly different, but not by much.

I just tried the latest ADM1166 load from Github... it seems like it added slightly more delay than the old one, but still only works on the one board.

I'll go through the timing diagram and see if I can figure out where it's failing. I don't know if this is a hint or not, but a lot of the voltages are nearly 0V on the non-working carrier (no voltages out of U8 or U15)... it might just be that they're not getting the enable signals or something though.

Thanks,
Pat

pdaderko
Junior(6)
Hmm... going through the

Hmm... going through the timing diagram, it seems assert 3.3V_EN, but not MGTAVCC_EN. Looking at MGTAVCC on the scope, it appears that it may be slightly too high (around 1.06V)... I believe that should be closer to 1.0V (the diagram says good needs to be between 0.95V and 1.051V).

It looks like R241 and R242 set that voltage, though checking them in-circuit doesn't seem to give me good readings, so I'll pull the resistors and see how close they are to their nominal values.

Pat

mbrown
Moderator(7)
The carrier regulators will

The carrier regulators will not enable unless the SOM 1.8V supply (U18) releases it's PGOOD signal, ensuring that the Zynq core voltage is online before the carrier can enable the Zynq I/O rails.
 
You said that you see both SOM green LEDs light briefly. That tells me the PG_MODULE signal is released momentarily by both SOM and Carrier.  That should mean that all supplies were measured valid for one moment.
 
Did you uncover any other symptoms that might help us debug?
 
Thanks,
/Matt
 
 
 

pdaderko
Junior(6)
I checked out those resistors

I checked out those resistors under the microscope, and R241 looked a little weird. Under closer inspection, I could see it was actually missing some of its film.

I pulled it, and it was reading about 21K, rather than 16.2K. I dug out a new one from an old kit I had laying around and replaced it... fired it up, and it WORKS!

It's hard to get a good picture through the microscope (no fancy camera microscope here), but you can sorta see what I'm referring to in this pic: http://imgur.com/8Cm9SQN .

Thanks for the help!

Pat

Charly_k
Junior(0)
Glad you were able to zoom in

Glad you were able to zoom in on the issue and resolve it.

You can enjoy the SOM board now :)

Charly

mbrown
Moderator(7)
Great debug work!  Sorry you

Great debug work!  Sorry you had to go through that.
 
These boars are all tested after assembly, so something must have happened during shipping.
 
/Matt