Options for FBSD support with LCD device - new project

[Emmanuel Vadot]

On Mon, 18 Mar 2019 10:07:50 -0600
Ian Lepore <ian at freebsd.org> wrote:

> On Mon, 2019-03-18 at 15:56 +0000, Kaya Saman wrote:
> > Many thanks Michael!
> > 
> > 
> > I have also found this guide too: 
> > https://www.rototron.info/lcdproc-tutorial-for-raspberry-pi/
> > 
> > 
> > It goes through the GPIO connection using a Raspberry Pi and a CF 
> > HD44780 compatible display. This should also work in a similar
> > fashion 
> > with the Odroid.
> > 
> 
> Before you go too far down this path, you should probably be aware that
> odroid isn't really supported on freebsd.  There was some initial work
> done to support the original C1, but it was basically a drive-by commit
> which hasn't been actively supported since then.
> 
> You should consider some well-supported board, something based on an
> Allwinner or imx6 SOC would be a good candidate.
> 
> Gpio sounds like about the worst way to connect a display.  Something
> based on i2c or SPI would be a much better choice.  Usually the so-
> called "usb" solutions are really just forms of i2c or SPI being bit-
> banged by an FTDI chip.  Not a horrible solution, but probably not
> quite as efficient as native i2c or spi.

 For an hd44780 based display GPIO is easy and ok, also now (and
probably for the last 10-15 years) you can find modules using this
controller with an i2c/spi uC to talk to them more easily.

> -- Ian
> 
> 
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-- 
Emmanuel Vadot <manu at bidouilliste.com> <manu at freebsd.org>