Thank you very much Micka. I am not in rush, can play with 8250 if it works. I assume my .dtb is wrong or some kernel option is not selected. Let's wait for somebody who has got this working. 4.6 rc behaves the same.
2016-04-26 7:59 GMT+01:00 Micka <[email protected]>: > 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 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