On 11/10/2015 03:45 PM, Micka wrote: > Not now I'm going to use RS485 working on the kernel 4.1 . ( I used > 3.8 before ) . > > Robert.N the patches are not exactly what we want for the beaglebone > black ( 8250_fintek 8250_lpc18xx ) ; correct me if I'm wrong. > > And most of the time we don't use the hardware control of the PIN, We > use other Pins to control the DE/RE . > > > Floriant, I don't have time yet to work on this case, ( maybe on > december ). But could you do some test on your own ? Not for November 23, since I will be on a business trip next week. But after that I will try to look into it. > That the official documentation of the RS485 with the kernel 4.1 : > http://lxr.free-electrons.com/source/Documentation/serial/serial-rs485.txt?v=4.1 > > Also I remember that the kernel 4.1 is build by default with not the > OMAP configured, you need to build the kernel yourself : > > git clone https://github.com/RobertCNelson/bb-kernel.git > ...... > > and activate omap as a serial driver. > > > Micka, > > > > Le mar. 10 nov. 2015 à 15:29, Robert Nelson <robertcnel...@gmail.com > <mailto:robertcnel...@gmail.com>> a écrit : > > On Tue, Nov 10, 2015 at 7:02 AM, > <florian.feldbaue...@googlemail.com > <mailto:florian.feldbaue...@googlemail.com>> wrote: > > > > Hey all, > > > > I'm currently using the latest Debian Jessie image (2015-11-08) > on my > > Beaglebone Black. > > I want to use UART4 as RS485 interface and use gpio3_19 as DE/RE > signal. > > > > The device tree overlay which I use to configure the pinmux > settings can be > > found here: > > https://github.com/Sillern/BB-RS485/blob/master/BB-RS485-00A0.dts > > > > When I load this overlay and try to configure the port in my C > program, I > > always get the error message "inappropriate ioctl for device" > > when using the command > > ioctl( fd, TIOCSRS485, &rs485conf ) > > where rs485conf is a struct serial_rs485 > > > > The image uses kernel version 4.1.12-ti-r28. Has this kernel > version RS485 > > support enabled for the UART interfaces? > > If not, is there a kernel version (preferable 4.1.X) which > supports RS485 on > > the UARTs of the BBB? > > There are a few patches being discussed, please follow > > http://www.spinics.net/lists/linux-serial/msg19564.html > > http://www.spinics.net/lists/linux-serial/ > > I'd like to backport what ever comes out of above ^ > > Regards, > > -- > Robert Nelson > https://rcn-ee.com/ > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google > Groups "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, > send an email to beagleboard+unsubscr...@googlegroups.com > <mailto:beagleboard%2bunsubscr...@googlegroups.com>. > For more options, visit https://groups.google.com/d/optout. >
-- ---------------------------------------- | Dr. Florian Feldbauer | | | | Helmholtz-Institut Mainz / | | Johannes Gutenberg-Universität Mainz | | Johann-Joachim-Becher-Weg 36 | | D-55128 Mainz | | | | Office: SB1 / 00-213 | | Phone: (+49)6131 / 39-29608 | ---------------------------------------- -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
