Date: Mon, 18 Mar 2019 17:34:18 +0000 From: Kaya Saman <kayasaman@optiplex-networks.com> To: Ian Lepore <ian@freebsd.org>, "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: Options for FBSD support with LCD device - new project Message-ID: <e5d42c67-e1f2-ede1-965f-c89226de46da@optiplex-networks.com> In-Reply-To: <0ecf23e129ca7ac6a92a01bbb34c03f1ac8c6dc8.camel@freebsd.org> References: <ad61a598-53af-02a5-41db-0128da7d1a34@optiplex-networks.com> <CAF19XBLAjP4yKtGSBzA4QdT346Bnbnr8MutQNZgmERLbJkWAyA@mail.gmail.com> <8df902f6-20a3-31c4-71ac-91f5d5fdf50d@optiplex-networks.com> <0ecf23e129ca7ac6a92a01bbb34c03f1ac8c6dc8.camel@freebsd.org>
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On 3/18/19 4:07 PM, Ian Lepore 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. > > -- Ian > > That was great advise! Thanks Ian :-) Looking at the FreeBSD support for these types of boards, it seems the most common devices are either the Raspberry Pi family and the Beagleboard Black and Green. It looks like both Raspberry Pi 2B and the Beaglebone Black have good support with FreeBSD and both offer SPI headers. I am not sure about the state of the Pi3 as the information comes up with unknown. I'm just reading through the wiki page for the BB Black: https://wiki.freebsd.org/FreeBSD/arm/BeagleBoneBlack right now trying to get a better understanding of things in general. It might be a good option as it sounds fairly easy to deploy FBSD on it. Regards, Kaya
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