Testing a new 3.5” 640x480 IPS DPI LCD

[tinkerBOY]

I'm not really sure as I'm just learning about this initialization thing on this lcd but looking at the Hyperpixel, it looks like there's a program that runs once and writes codes to it via spi on the Raspberry Pi to initialize it. So if its just a one time write to initialize the lcd then it would make sense to just remove the mcu that does the initialization and just initialize the lcd at the factory with an external programmer like maybe Arduino Uno or something.

[floppes]

The initialization data is usually not stored in the LCD controller. You have to initialize it on every power up.
The parameters are not trivial, especially if you have to write a gamma table. You will need to ask the manufacturer for the correct initialization data or sniff it [;)]

[tinkerBOY]

The initialization data is usually not stored in the LCD controller. You have to initialize it on every power up.
The parameters are not trivial, especially if you have to write a gamma table. You will need to ask the manufacturer for the correct initialization data or sniff it [;)]

You’re right I just talked to one of the manufacturers and he said it needs the initialization every power up.

[Bad_Robot]

tinkerBOY, do you know if the screen you tested is still available somewhere (without MCU) ? or if there is an equivalent ? (640x480 compatible with your DPI adapter)

[tinkerBOY]

tinkerBOY, do you know if the screen you tested is still available somewhere (without MCU) ? or if there is an equivalent ? (640x480 compatible with your DPI adapter)

I might be able to sell this screen maybe 1-3 months from now.

[PierreLo]

Why do you use 18 bit and not 24? The GPIO interface doesn't have enough GPIO?

And did you finally released that screen? It's been a while so I wonder if it has been scrapped.