I dont know about 8250, but omap work well. I'm more confident about omap handling the gpio than the driver 8250.
I've been using omap for rs485 since the driver 3.8 and I've nothing to complain about. I will also switch to the driver 8250 when it will be ready ( a lot of test need to be done ) Micka, Le mar. 26 avr. 2016 08:05, 'Artur Festyn' via BeagleBoard < [email protected]> a écrit : > Hi Micka. > no ttyO, its 8250 driver. > shouldn't 4.5 kernel work after these patches are applied or is it still > too early? > > -rw-r--r-- 1 root root 1440 Apr 21 12:26 > 0001-tty-serial-8250-fix-RS485-half-duplex-RX.patch > -rw-r--r-- 1 root root 8243 Apr 21 12:26 > 0002-tty-serial-8250-make-UART_MCR-register-access-consis.patch > -rw-r--r-- 1 root root 2743 Apr 21 12:26 > 0003-serial-mctrl_gpio-add-modem-control-read-routine.patch > -rw-r--r-- 1 root root 1347 Apr 21 12:26 > 0004-serial-mctrl_gpio-add-IRQ-locking.patch > -rw-r--r-- 1 root root 7924 Apr 21 12:26 > 0005-tty-serial-8250-use-mctrl_gpio-helpers.patch > > the last one clearly states that use of any gpio as rts should be possible > > > 2016-04-26 6:54 GMT+01:00 Micka <[email protected]>: > >> Can you show me what this command show : >> >> dmesg|grep ttyO* >> >> I repeat only omap driver work for rs485 >> >> Le mar. 26 avr. 2016 00:40, 'Artur Festyn' via BeagleBoard < >> [email protected]> a écrit : >> >>> It is easy and already disabled. >>> My question is about RS485 and custom gpio to drive DE pin of RS485 chip. >>> >>> >>> 2016-04-25 23:22 GMT+01:00 evilwulfie <[email protected]>: >>> >>>> 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]>: >>>> >>>>> *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]>[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]> >>>>>> [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]> >>>>>>> [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> >>>>>>>>> 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> >>>>>>>>> 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> >>>>>>>> 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 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