DS90UB929-Q1EVM: EVM board not displaying image on display

Hi Hamza,

The comprehensive information you gave me is difficult to understand exactly the situation. Can you provide me more information?

• Can you read the I2C address on the script properly?
• Is it able to see that the LOCK LED on the EVM is high?
• Please share the setup photo and the ALP information tab screenshot if it is possible.

You can look at the 929 EVM user guide. (SNLU172) 1.7 Quick Start Guide would be helpful.

Best,

Josh

Hello Josh,

My apologies for the confusing initial message I provided. Basically, what I am trying to do is output an image to an external display using the TI board. The board has the serializer which connects to the desializer of another board that is with the display. I was able to get a link for the partner board in the ALP software but I am not able to use any of the Pattern Generator functions to control the display. 

As you can see I do have a connection between the partner board and the actual device. Along with that I am linked to the deserializer and the video source. I am wondering if there are certain settings I need to alter to allow for the Pattern Generation features to work. I have attached that screen capture below as well as a capture of the EVM board. 

Thank for all the help!

Hamza

Hi Hamza,

Please check the steps below.

1. Check EVM configuration and jumper are matched with user guide
2. On pattern generator tab, make sure the timing source between external from HDMI source or internal 
3. Click apply button after video control setting
4. Check Enable pattern generator
5. Check color bars or any option you want.
6. Check PCLK on information tab for SER and DES are matching the sending PCLK.

Best,

Josh

Hello Josh,

Thanks for the reply but I am still not getting any pattern on my display. I have having issues syncing the PCLK from my SER and DES as shown in the image below

I have also uploaded images of the HDMI and Pattern generation tab along with the register outputs. Please let me know if any more information is needed.

[REGISTERS]
Device = ALP Nano 1 - DS90UB929, Connector 1
Comments = "Register Data"
Date = 08/22/2023
Time = 14:20:00
Reg = 0,0x0000,0x18
Reg = 0,0x0001,0x00
Reg = 0,0x0003,0xDA
Reg = 0,0x0004,0x80
Reg = 0,0x0005,0x00
Reg = 0,0x0006,0x58
Reg = 0,0x0007,0xA0
Reg = 0,0x0008,0xB0
Reg = 0,0x0009,0x00
Reg = 0,0x000A,0x6C
Reg = 0,0x000B,0x00
Reg = 0,0x000C,0x07
Reg = 0,0x000D,0x20
Reg = 0,0x000E,0x00
Reg = 0,0x000F,0x00
Reg = 0,0x0010,0x00
Reg = 0,0x0011,0x00
Reg = 0,0x0012,0x00
Reg = 0,0x0013,0x88
Reg = 0,0x0014,0x00
Reg = 0,0x0015,0x01
Reg = 0,0x0016,0xFE
Reg = 0,0x0017,0x1E
Reg = 0,0x0018,0x7F
Reg = 0,0x0019,0x7F
Reg = 0,0x001A,0x01
Reg = 0,0x001B,0x00
Reg = 0,0x001C,0x00
Reg = 0,0x001D,0x00
Reg = 0,0x001E,0x01
Reg = 0,0x001F,0xF7
Reg = 0,0x0020,0x03
Reg = 0,0x0021,0x00
Reg = 0,0x0022,0x25
Reg = 0,0x0023,0x00
Reg = 0,0x0024,0x00
Reg = 0,0x0025,0x00
Reg = 0,0x0026,0x00
Reg = 0,0x0027,0x00
Reg = 0,0x0028,0x01
Reg = 0,0x0029,0x20
Reg = 0,0x002A,0x20
Reg = 0,0x002B,0xE0
Reg = 0,0x002C,0x00
Reg = 0,0x0030,0x00
Reg = 0,0x0031,0x00
Reg = 0,0x0032,0x00
Reg = 0,0x0033,0x00
Reg = 0,0x0034,0x00
Reg = 0,0x0035,0x00
Reg = 0,0x0036,0x00
Reg = 0,0x0037,0x00
Reg = 0,0x0038,0x00
Reg = 0,0x0039,0x00
Reg = 0,0x003A,0x00
Reg = 0,0x003B,0x00
Reg = 0,0x003C,0x00
Reg = 0,0x003D,0x00
Reg = 0,0x003E,0x00
Reg = 0,0x003F,0x00
Reg = 0,0x0040,0x14
Reg = 0,0x0041,0x4E
Reg = 0,0x0042,0x00
Reg = 0,0x0043,0x00
Reg = 0,0x0044,0x80
Reg = 0,0x0045,0x00
Reg = 0,0x0046,0x00
Reg = 0,0x0047,0x00
Reg = 0,0x0048,0x01
Reg = 0,0x0049,0x68
Reg = 0,0x004A,0x01
Reg = 0,0x004B,0xD0
Reg = 0,0x004C,0x02
Reg = 0,0x004D,0x00
Reg = 0,0x004E,0x00
Reg = 0,0x004F,0x00
Reg = 0,0x0050,0x97
Reg = 0,0x0051,0xA1
Reg = 0,0x0052,0x1E
Reg = 0,0x0053,0x00
Reg = 0,0x0054,0x08
Reg = 0,0x0055,0x0C
Reg = 0,0x0056,0x00
Reg = 0,0x0057,0x00
Reg = 0,0x0058,0x00
Reg = 0,0x0059,0x00
Reg = 0,0x005A,0xDD
Reg = 0,0x005B,0x20
Reg = 0,0x005C,0x02
Reg = 0,0x005D,0x06
Reg = 0,0x005E,0x44
Reg = 0,0x005F,0x4B
Reg = 0,0x0060,0x22
Reg = 0,0x0061,0x02
Reg = 0,0x0062,0x00
Reg = 0,0x0064,0x15
Reg = 0,0x0065,0x00
Reg = 0,0x0066,0x0D
Reg = 0,0x0067,0x16
Reg = 0,0x0068,0x30
Reg = 0,0x0069,0x0B
Reg = 0,0x006A,0x00
Reg = 0,0x006B,0x00
Reg = 0,0x006C,0x00
Reg = 0,0x0070,0x00
Reg = 0,0x0071,0x00
Reg = 0,0x0072,0x00
Reg = 0,0x0073,0x00
Reg = 0,0x0074,0x00
Reg = 0,0x0075,0x00
Reg = 0,0x0076,0x00
Reg = 0,0x0077,0x00
Reg = 0,0x0078,0x00
Reg = 0,0x0079,0x00
Reg = 0,0x007A,0x00
Reg = 0,0x007B,0x00
Reg = 0,0x007C,0x00
Reg = 0,0x007D,0x00
Reg = 0,0x0080,0x00
Reg = 0,0x0081,0x00
Reg = 0,0x0082,0x00
Reg = 0,0x0083,0x00
Reg = 0,0x0084,0x00
Reg = 0,0x0090,0x00
Reg = 0,0x0091,0x00
Reg = 0,0x0092,0x00
Reg = 0,0x0093,0x00
Reg = 0,0x0094,0x00
Reg = 0,0x0098,0x00
Reg = 0,0x0099,0x00
Reg = 0,0x009A,0x00
Reg = 0,0x009B,0x00
Reg = 0,0x009C,0x00
Reg = 0,0x009D,0x00
Reg = 0,0x009E,0x00
Reg = 0,0x009F,0x00
Reg = 0,0x00A0,0x00
Reg = 0,0x00A1,0x00
Reg = 0,0x00A2,0x00
Reg = 0,0x00A3,0x00
Reg = 0,0x00C0,0x05
Reg = 0,0x00C1,0x00
Reg = 0,0x00C2,0x88
Reg = 0,0x00C3,0x00
Reg = 0,0x00C4,0x68
Reg = 0,0x00C5,0x00
Reg = 0,0x00C6,0x00
Reg = 0,0x00C7,0x40
Reg = 0,0x00C8,0x40
Reg = 0,0x00C9,0x00
Reg = 0,0x00CA,0x00
Reg = 0,0x00CB,0x00
Reg = 0,0x00CC,0x00
Reg = 0,0x00CE,0xFF
Reg = 0,0x00D0,0x10
Reg = 0,0x00D1,0x00
Reg = 0,0x00D2,0x00
Reg = 0,0x00D3,0x00
Reg = 0,0x00E0,0x05
Reg = 0,0x00E1,0x00
Reg = 0,0x00E2,0x88
Reg = 0,0x00E3,0x00
Reg = 0,0x00E4,0x68
Reg = 0,0x00E5,0x08
Reg = 0,0x00E6,0x00
Reg = 0,0x00E7,0x00
Reg = 0,0x00F0,0x5F
Reg = 0,0x00F1,0x55
Reg = 0,0x00F2,0x42
Reg = 0,0x00F3,0x39
Reg = 0,0x00F4,0x32
Reg = 0,0x00F5,0x39
Reg = 0,0x00F6,0x00
Reg = 0,0x00F8,0x00
Reg = 0,0x00F9,0x00

Thank you!

Hamza

Hi Hamza, 

Are you able to isolate away from the HDMI input and use internal PCLK/CLK generation instead of external clock? 

Ideally, we can first start with 928 PatGen, verify the target timing and no system level display-side issues, then work back towards SER side by first doing SER PG internal CLK, then SER PG external CLK, then finally HDMI end to end. 

Regards, 

Logan

Hello Logan,

Apologies for the delay in the response but I found a way to get the Pattern Generation feature working and it's able to display the color bars. What would be the next steps to get HDMI to work?  I've played around with some of the settings but have not been successful in getting HDMI to display anything. Are there certain settings that I would need to set in the HDMI tab?

Thanks!

Hamza

Hi Hamza,

Could you clarify where you verified the PATGEN? (928 PATGEN, 929 PG internal CLK, or 929 PG external CLK)

Best,

Josh

Hey Josh,

I used the 929 PatGen with internal CLK to display the color bars.

Thanks,

Hamza

Hi Hamza,

Have you tried the PATGEN with external CLK?

Best,

Josh

Hello Josh,

When I try PatGen with external clock nothing is generated. Are there certain settings I would need to alter in the HDMI tab settings to see an image? Also, when displaying a PatGen image from HDMI do I select the Enable Generator to be on?

Thanks,

Hamza

Hello Josh, 

I have the pattern generation working but now am having issues with the HDMI resolution. I am using a display that has a custom resolution and have run an EDID script to try to use the internal SRAM to force this custom resolution. However, it keeps defaulting to the resolution of 1280x720, is there any other way to force my custom resolution onto the EVM?

Thanks,

Hamza

Hi Hamza, 

929 has several ways of loading or overwriting EDID. Please refer to the following presentation for details on each. 

The easiest way would be to programmatically override the EDID in SRAM. 

Using EDID in FPD-Link Devices (3).pptx

If you are using ALP tool, we can provide a script for EDID updating.

Regards, 

Logan

Hello Logan,

Thank you for that resource! I am trying to get a resolution of 1280x640 on my display using ALP so a script would be perfect.

Thank you,

Hamza

Hi Hamza, 

Can you provide the exact EDID file you are trying to load?

Regards, 

Logan

Hello Logan,

Just for clarification, would you like my display specs or the script itself?

Thanks,

Hamza

Hi Hamza,

Yes, I would need the underlying EDID file that you want uploaded (256 bytes), I can then create a script for it.

Logan