DSI to HDMI adapter B-LCDAD-HDMI1

[TJM]

Quick question, maybe.

Is there a cable assembly that can be recommended that will plug into CN1 (DSI Port) on the B-LCDAD-HDMI1 DSI-HDMI adapter?

Thanks,

TJM

[Tesla DeLorean]

Isn't a SAMTEC MICTOR connector of some type?

Check BOM for board, and perhaps receiving DISCO boards for specific Part# if not called out in the schematics

https://www.st.com/en/evaluation-tools/b-lcdad-hdmi1.html#cad-resources

[Tesla DeLorean]

QTH-030-02-F-D-A (B-LCDAD-HDMI side)

https://www.samtec.com/products/qth-030-02-f-d-a

See "Mating Connectors"

QSH-030-01-F-D-A-K-TR  (STM32F769-DISCO side)

https://www.samtec.com/products/qsh-030-01-f-d-a-k-tr

[TJM]

Checking,

Thanks.

[TJM]

It appears these Samtec connectors will mate to the ST DSI-to-HDMA connector but these are all board mount connectors that may require a custom circuit board as I can't find anything that will handle these. 

Next question.  Are there any ST boards that will plug directly to the DSI port on this adapter?

Thanks,

TJM

[Tesla DeLorean]

There are some panels, and an RPi flex connector adapter

[TJM]

Thanks for the information. I'm not sure this particular adapter (B-LCDAD-HDMI1) is the interface I need to make this project work. I've started a related thread regarding the DSI interface and DSI LCD to gain more knowledge about how to use these displays.

Thanks,

TJM

[Tesla DeLorean]

Yeah, I'm not party to your project.

The parameters for a particular display would be derived from it's documentation and expectations. The DSI here is limited to 2-Lanes and 250 MHz (effectively 500 Mbps using DDR, data on both edges), or 1Gbps of pixel data.

ST has provided a rectangular and round displays using this connector method, and third-parties have also used it.

The HDMI adapter allows for a broader range of VGA/DVI monitors for display modes up to around 1.2 - 1.4 Mpixel (say 1388x768), using the ADV7533 driver in the BSP/Components directory

https://www.st.com/en/evaluation-tools/b-lcd40-dsi1.html

https://www.st.com/en/evaluation-tools/32l4r9idiscovery.html

https://www.st.com/en/evaluation-tools/b-lcdad-rpi1.html

https://community.st.com/t5/stm32-mcus-touchgfx-and-gui/dsi-interface-general-information/td-p/716472

[TJM]

Thanks for all the info and links.

I'm wading through these along with some other docs and code I've found.  At this point I think I've chosen the wrong display for my purposes not to mention this DSI display has put me in way over my head for now.  I was looking for something simple that apparently doesn't exist to make this work.  Not really surprising considering access to the formal specs for the MIPI-DSI interface cost $2000+, as a member.  There's also a number of docs and links from my other thread on the topic that I'll review, too.

Thanks,
TJM

[Tesla DeLorean]

Yes, well really just a low pin count way of funnelling data to the panel.

The DSIHOST serializes frame data spilling from the LTDC

The LTDC is just rendering lines from the frame buffer.

How the MCU interacts with the frame buffer is pretty much consistent, and same model for 40+ years

DSI is just a way of doing some of the plumbing, and usually not something you need to get deeply involved in, just have to get the bandwidth and timing ducks all lined up. DSI throughput needs to meet/exceed the delivery out of the LTDC.

Parallel RGB output is the most basic form, just eats a lot of pins, and isn't flexible as to which. Gets to be an exercise in board design and cabling.

You want to find panels with a design win in phones or tablets, and ride the wave of millions of units someone else is buying.

Also watch that life cycles for specific panels are apt to be 18-24 months, not 5-10 years.