Raspberry Pi and WaveShare SpotPear LCD screens

[Matthieu Volat]

> Le 28 déc. 2015 à 14:55, Bernd Walter <ticso at cicely7.cicely.de> a écrit :
> > [...]
> 
> Basicly they run with fixed configuration HDMI dummy output and then
> copy the framebuffer over SPI to the display, which has it's own
> displaymemory.
> The board has some shift registers, so I'm guessing that the panel
> itself uses a memory bus.
> At least one GPIOs is used for backlight and I think there is an enable.
> The touch controller is connected to I2C and needs it's own driver too.
> Havn't worked out the details.
> Easiest for you would be to use one of their bigger HDMI displays.
> They have 5" and 7" and recently also 10.x".
> Be aware that they have two 5" - one is connected to the GPIO header
> for Power and I²C to run the touch controller.
> The other one uses USB cables and an STM32 controller to run the touch
> controller as an USB device - not sure if it is a standard device,
> since I'd tested it with a Linux desktop and it didn't run out of the box.
> I havn't run any FreeBSD with display yet.
> 

Thanks, that's a very good summary. So if I understand well, we'd need to add a whole new class of framebuffer. That would be a good exercise, but I fear not having enough time/knowledge to do so... not soon at least.

Thank you very much, I'll try to read a bit more about the fb devices in /usr/src/arm/bcm2835, as well as look a bit at the fbtft module in Linux staging area.

-- Matthieu Volat <mazhe at alkumuna.eu>





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