Date: Tue, 19 Mar 2019 00:10:28 +0100 From: Emmanuel Vadot <manu@bidouilliste.com> To: Ian Lepore <ian@freebsd.org> Cc: Kaya Saman <kayasaman@optiplex-networks.com>, Michael Zhilin <mizhka@gmail.com>, "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org>, Mori Hiroki <yamori813@yahoo.co.jp> Subject: Re: Options for FBSD support with LCD device - new project Message-ID: <20190319001028.8dedeb356095de425f2a35e5@bidouilliste.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>
next in thread | previous in thread | raw e-mail | index | archive | help
On Mon, 18 Mar 2019 10:07:50 -0600 Ian Lepore <ian@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 > > > _______________________________________________ > freebsd-arm@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-arm > To unsubscribe, send any mail to "freebsd-arm-unsubscribe@freebsd.org" -- Emmanuel Vadot <manu@bidouilliste.com> <manu@freebsd.org>
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20190319001028.8dedeb356095de425f2a35e5>