Re: [beagleboard] Re: UART4 RS485 (RTS) not working

Yes, Dont solder Rx-serial to Rx-CAN-bus. The email/posts above are concerning the RTS pin and allocating another BeagleBone to it: the DMA one and not GPIO one On Thu, Apr 18, 2019 at 6:46 PM wrote: > Hello > may be there is wrong hardware design with Waveshare RS485/CAN Cape. I > don't think

Re: [beagleboard] Re: UART4 RS485 (RTS) not working

haracter rate? > Seems like the driver would still have to monitor data directly coming in > from or going out of the UART which would defeat the purpose of the DMA, > right?? It seems like you or the driver would have to switch off the DMA > if hardware flow control is used Hmmm,

Re: [beagleboard] Re: UART4 RS485 (RTS) not working

ort what we're trying here. Everything I've read (including >>> https://groups.google.com/forum/#!msg/beagleboard/nMtRpdWSJu0/EDSXqGpiBAAJ) >>> seems to suggest that the 8250 doesn't yet handle toggling the RTS/CTS >>> lines on its own based on delays between characters, b

Re: [beagleboard] Re: UART4 RS485 (RTS) not working

dont forget to remove jumper that bypasses RTS pin and grounds/raises it for sending/receiving only. can't remember the order On Tue, Nov 21, 2017 at 11:46 AM Rnd Mpt <rnd...@gmail.com> wrote: > Hi, > > With RS485-modbus-converters the timing of the RTS pin is CRUCIAL. > Softw

Re: [beagleboard] Re: UART4 RS485 (RTS) not working

We used the rs485 version/branch of the modbus on github. Sorry i meant to say rts instead of cts. I used my github as notes. Follow readmes and see if it helps. Its been a while since we did this. Let me know if more help is needed https://github.com/rwdutoit/beaglebone?files=1 On Mon, 13 Nov

Re: [beagleboard] UART4 RS485 (RTS) not working

You have to use the hardware cts. Waveshare does not do this and youll have to solder in this wire/cts On Fri, 10 Nov 2017, 21:33 , wrote: > Did you ever get this to work > > I am using the Nelson yakbuild kernel 4.9.45 and disabled the 8250 and > enabled omap serial in