Using composite or VGA input with an LCD breakout board
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Omar_Elsayed
- Posts: 2
- Joined: Wed May 20, 2020 2:55 pm
Using composite or VGA input with an LCD breakout board
I want to use the 'Adafruit 50 pin 0.5mm pitch FPC Adapter' (Product ID: 1492) with a '3.2" TFT Display with Resistive Touchscreen' (Product ID: 4278). I want to wire it directly to a board that outputs composite or VGA. Is this possible? How would I wire it? If it doesn't work, then anyone know what will? I need a screen about 2.8" to 3.2" that can take composite or VGA.
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adafruit_support_mike
- Posts: 67485
- Joined: Thu Feb 11, 2010 2:51 pm
Re: Using composite or VGA input with an LCD breakout board
The direct connection won't do what you want.
The display in question just displays data in its memory buffer, and has an SPI interface to update the memory. You'd need a system that knows how to interpret composite or VGA signals, convert them to a raster, then pass that data to the display.
We don't have any devices which can do that, and I don't know of any pre-built boards that can. VGA uses analog voltages for the RGB signals, with dot-clock signals for horizontal and vertical synchronization. Most microcontroller VGA projects go the other direction: generating VGA instead of trying to read it.
The display in question just displays data in its memory buffer, and has an SPI interface to update the memory. You'd need a system that knows how to interpret composite or VGA signals, convert them to a raster, then pass that data to the display.
We don't have any devices which can do that, and I don't know of any pre-built boards that can. VGA uses analog voltages for the RGB signals, with dot-clock signals for horizontal and vertical synchronization. Most microcontroller VGA projects go the other direction: generating VGA instead of trying to read it.
Please be positive and constructive with your questions and comments.