Custom Display Driver Board for LattePandaAlpha

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RBV_DabKick
Posts: 6
Joined: Fri Feb 01, 2019 11:19 pm

Tue Jul 09, 2019 2:47 am

Hi All,

I am having a chinese vendor build a custom display driver board for me, as I am running Ubuntu 16.04 and touch does not work on the DFRobot 'Touch' Display for the LPA.

I have high hopes, but in order to debug the board the vendor had a couple questions (this is more or less a direct quote and I am not an EE):

1. What platform the motherboard is on?
2. What IC is for the main controller?
3. What's the signal source is?

I assume the signal source is the GPU (?), but I am fairly confused about what is meant by 'platform'.

My big hope is that someone can tell me the IC for the main controller, which sounds vague to me, but again, I am not an EE.

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ccs_hello
Posts: 440
Joined: Sat Oct 13, 2018 9:16 pm

Tue Jul 09, 2019 12:25 pm

Most eBay/Aliexpress vendors, when they say they customize, what they do is to
adapt a LCD panel with a HDMI-to-LCD board to make the entire HDMI monitor assembly out of individual component parts. No more and no less.
No touch screen hardware and driver software will be included.
Is that what you want? (HDMI based display, as oppose to eDP based display output? Don't care about touch?)

Please describe your real requirements here as opposed to a specific eBay/Ali seller's.

P.S. this diagram shows LP Alpha's connector pinout: https://i.imgur.com/9vZ9sKQ.png

User avatar
RBV_DabKick
Posts: 6
Joined: Fri Feb 01, 2019 11:19 pm

Tue Jul 09, 2019 2:41 pm

Thanks for the connector pinout. I believe the vendor is looking for the actual surface mounted components.

I am looking for eDP connection, with touch.

I have selected a touch panel and HDMI display separately. I have received and tested these using a multifunction driver board (standard coastline ports: USB+HDMI connections).

The vendor is now developing a converter board that will convert to eDP connection, allowing a more integrated, low profile configuration.

Again the vendors requested information:

1. What platform the motherboard is on?
2. What IC is for the main controller?
3. What's the signal source is?

User avatar
ccs_hello
Posts: 440
Joined: Sat Oct 13, 2018 9:16 pm

Wed Jul 10, 2019 12:15 am

Q Platform
A Intel M3-7Y30 Kaby Lake (or M3-8100Y Amber Lake Y)

Q main graphics controller:
A same as above, Intel SoC (Integrated graphics card)

Q main touch controller
A Don't know, probably integrated one inside the Intel CPU/SoC (using I2C interface; Touch controller should be on the "touch panel" side)

Q (graphics) signal source
A Intel CPU/SoC

BTW, one does not need to get a special/custom adapter (e.g., eDP to MIPI-DSI).
People just go get an eDP LCD panel with the right matching spec., and just direct connect (via flex cable.)

See
http://docs.lattepanda.com/content/alph ... d_display/
There are links to (at least) two forum threads about compatible eDP LCD panel (use panellook to get detailed spec.)

Touch part can be rather tricky (not my domain interest...) on both hardware and driver end.
One can always choose a USB based touch panel as opposed to I2C based solution shown in the pinout diagram.

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