I can't use RTS/CTS pins on UART4 because I need HDMI. New RS485 patches suppose to help to use any gpio as RS485 RTS and in fact any gpio for any UART as RTS/CTS.
2016-04-25 21:00 GMT+01:00 evilwulfie <[email protected]>: > any reason you want to use uart1 ? > > if you use uart4 you can use the whole uart tx rx and rts. trying to > bitbang rts for rs485 on uart1 sounds hard > > > > On 4/25/2016 12:24 PM, 'Jan Kinkazu' via BeagleBoard wrote: > > So i compiled (bb-kernel, all patches) and installed 4.5.2-bone4 > I have modified am335-boneblack.dts and compiled it. > > #include "am335x-peripheral-ttyS1.dtsi" > #include "am335x-bone-pinmux-ttyS1.dtsi" > > &am33xx_pinmux { > uart1_pins: pinmux_uart1_pins { > pinctrl-single,pins = < > /* P9_23: uart1_de */ > BONE_P9_23 (PIN_OUTPUT_PULLDOWN | MUX_MODE7) > >; > }; > }; > > &uart1 { > pinctrl-names = "default"; > pinctrl-0 = <&uart1_pins>; > status = "okay"; > rts-gpios = <&gpio1 17 GPIO_ACTIVE_HIGH>; > rs485-rts-active-high; > rs485-rx-during-tx; > rs485-rts-delay = <1 1>; > linux,rs485-enabled-at-boot-time; > }; > > RS485 doesn't work, what do I do wrong? > > Kind regards > > > On Friday, 12 February 2016 15:33:40 UTC, Taceant Omnes wrote: >> >> I would like to use RS485 with the BBB. >> >> root@beaglebone:~/test# uname -a >> Linux beaglebone 4.1.15-ti-r40 #1 SMP PREEMPT Thu Jan 7 23:32:17 UTC >> 2016 armv7l GNU/Linux >> >> I am using the kernel above. Its source code is at >> https://github.com/RobertCNelson/linux-stable-rcn-ee/tree/4.1.15-ti-rt-r40 >> >> ... however it does not include the changes in this patch: >> >> https://github.com/RobertCNelson/bb-kernel/blob/am33x-v3.8/patches/fixes/0007-omap-RS485-support-by-Michael-Musset.patch#L30 >> >> Which kernel should I use that includes the changes in the patch or >> something similar? >> > -- > 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 [email protected]. > To view this discussion on the web visit > <https://groups.google.com/d/msgid/beagleboard/50692f39-69e3-4454-b8ba-ec03e4d86101%40googlegroups.com?utm_medium=email&utm_source=footer> > https://groups.google.com/d/msgid/beagleboard/50692f39-69e3-4454-b8ba-ec03e4d86101%40googlegroups.com > . > For more options, visit https://groups.google.com/d/optout. > > > > > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon> > Virus-free. > www.avast.com > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link> > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/nMtRpdWSJu0/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/571E7751.2020206%40gmail.com > <https://groups.google.com/d/msgid/beagleboard/571E7751.2020206%40gmail.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAAPjYCae4vGaqBNaAXsqKqMOuKKOKCBSFVG6ZKEa0BMKBSsmMA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
