read this. disabling I2C2 is not as easy as using an overlay if you are not using capes sure but IMHO is always best to leave the default things enabled and just work with overlays
http://www.embedded-things.com/bbb/enable-canbus-on-the-beaglebone-black/ On 4/25/2016 2:09 PM, 'Artur Festyn' via BeagleBoard wrote: > Honestly I don't know. I though this might be useful info :) > Three is no problem to disable I2C-2, but I am using those pins for CAN0. > That is why I want to use custom gpio to drive RS485 DE which doesn't > work. > > 2016-04-25 21:56 GMT+01:00 William Hermans <[email protected] > <mailto:[email protected]>>: > > /cat /proc/tty/driver/serial/ > > /serinfo:1.0 driver revision:/ > /0: uart:8250 mmio:0x44E09000 irq:158 tx:2451 rx:0 > RTS|CTS|DTR|DSR/ > /*1: uart:8250 mmio:0x48022000 irq:159 tx:24 rx:0 CTS|DSR|CD|RI*/ > /2: uart:8250 mmio:0x48024000 irq:160 tx:0 rx:0 CTS|DSR/ > /3: uart:unknown port:00000000 irq:0/ > /4: uart:8250 mmio:0x481A8000 irq:161 tx:2 rx:1 brk:1 CTS|DSR/ > > /5: uart:unknown port:00000000 irq:0/ > > What is this supposed to mean ? That says UART0 has RTS, CTS, etc, > but they're not connected to anything. So the CTS on UART1 means > nothing. Because it's connected to I2C-2, which I'm sure you would > have all kinds of fun disabling I2C-2 . . . > > > On Mon, Apr 25, 2016 at 1:14 PM, 'Artur Festyn' via BeagleBoard > <[email protected] > <mailto:[email protected]>> wrote: > > cat /proc/tty/driver/serial > serinfo:1.0 driver revision: > 0: uart:8250 mmio:0x44E09000 irq:158 tx:2451 rx:0 RTS|CTS|DTR|DSR > *1: uart:8250 mmio:0x48022000 irq:159 tx:24 rx:0 CTS|DSR|CD|RI* > 2: uart:8250 mmio:0x48024000 irq:160 tx:0 rx:0 CTS|DSR > 3: uart:unknown port:00000000 irq:0 > 4: uart:8250 mmio:0x481A8000 irq:161 tx:2 rx:1 brk:1 CTS|DSR > 5: uart:unknown port:00000000 irq:0 > > > 2016-04-25 21:12 GMT+01:00 Artur Festyn <[email protected] > <mailto:[email protected]>>: > > 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] <mailto:[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] >> <mailto:[email protected]>. >> To view this discussion on the web visit >> >> 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] > <mailto:[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] > <mailto:[email protected]>. > To view this discussion on the web visit > > https://groups.google.com/d/msgid/beagleboard/CAAPjYCaM58KxhqX_s1DwsdJ7z2tdemEoCVHjZj0D780CpxQTug%40mail.gmail.com > > <https://groups.google.com/d/msgid/beagleboard/CAAPjYCaM58KxhqX_s1DwsdJ7z2tdemEoCVHjZj0D780CpxQTug%40mail.gmail.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 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] > <mailto:[email protected]>. > To view this discussion on the web visit > > https://groups.google.com/d/msgid/beagleboard/CALHSORrEpSMUET0monBs3YB-qonsfYPzCjQex%3DZdhZ-KMskn%2BA%40mail.gmail.com > > <https://groups.google.com/d/msgid/beagleboard/CALHSORrEpSMUET0monBs3YB-qonsfYPzCjQex%3DZdhZ-KMskn%2BA%40mail.gmail.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] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/CAAPjYCawdcQZ1%2BOvszmEj0Zp4yPfS7qDfMfOn-R1OZZ1u29KmQ%40mail.gmail.com > <https://groups.google.com/d/msgid/beagleboard/CAAPjYCawdcQZ1%2BOvszmEj0Zp4yPfS7qDfMfOn-R1OZZ1u29KmQ%40mail.gmail.com?utm_medium=email&utm_source=footer>. > For more options, visit https://groups.google.com/d/optout. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. 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