Date: Mon, 28 Dec 2015 16:40:59 +0100 From: Matthieu Volat <mazhe@alkumuna.eu> To: ticso@cicely.de Cc: freebsd-arm@freebsd.org Subject: Re: Raspberry Pi and WaveShare SpotPear LCD screens Message-ID: <F29722CA-C880-46F4-A3F2-48077A7B221D@alkumuna.eu> In-Reply-To: <20151228135554.GA45251@cicely7.cicely.de> References: <36285EFC-0739-4A93-B22D-C22B7BDEE16D@alkumuna.eu> <20151228135554.GA45251@cicely7.cicely.de>
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[-- Attachment #1 --] > Le 28 déc. 2015 à 14:55, Bernd Walter <ticso@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@alkumuna.eu> [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org iEYEARECAAYFAlaBWBAACgkQ+ENDeYKZi35/0ACeKi1Xjd/MfkzNOfaE9NXnlhnS 1VgAn271Lxe0wbof00dIRs0otoZ0jK0G =z2gw -----END PGP SIGNATURE-----home | help
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