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
Did you come right? Sorry, this account-email is not read frequently
On Tue, Nov 21, 2017 at 5:25 PM Jeff Andich wrote:
> Thank you!
>
> ?? Are you saying that lib modbus (which we haven't tried) has issues
> with reliably toggling the RTS line??
>
> One clarification with what I meant by
Thank you!
?? Are you saying that lib modbus (which we haven't tried) has issues with
reliably toggling the RTS line??
One clarification with what I meant by "manual toggling of the RTS line."
By manual software toggling, we specifically mean toggling the RTS line in
the protocol as follows:
Hi,
With RS485-modbus-converters the timing of the RTS pin is CRUCIAL. Software
toggling (GPIO toggling) of this pin (in the RS485/libmodbus library
someone added this capability) have shown (on oscilloscope) to not be
repeatable or works 1 in 30 attempts.
I think we used the stock standard
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 wrote:
> Hi,
>
> With RS485-modbus-converters the timing of the RTS pin is CRUCIAL.
> Software toggling (GPIO
A couple of things you may want to investigate before you use the OMAP
driver vs. the 8250:
1) According to an older Wiki from TI, the OMAP serial driver doesn't use
DMA in serial transfer, but 8250 does. Not sure if this is still the case??
I'm fairly confident the answer to my question about whether the 8250
driver implements "partial 485 capability", (allowing Python or a C#/.net
application to manually control the RTS line for a given UART via the
driver) is NO. But the OMAP driver DOES appear to allow this.
When I toggle
Hi,
Will the 8250 driver still allow "manual" control of the RTS line for a
given UART from an application like Python or C# (where the application
toggles the state of the RTS line, rather than driver, after sending a
request message in order to toggle the 485 XCVR), or is the OMAP driver (in
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
https://github.com/RobertCNelson/bb-kernel/issues/38
2017. november 10., péntek 20:33:49 UTC+1 időpontban dmezz...@gmail.com a
következőt írta:
>
> 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 kernel
Hi Mat,
I have the same issue: any response yet?
On Tuesday, March 28, 2017 at 2:52:07 PM UTC+2, Matthew Bezuidenhout wrote:
>
> Hi all,
>
> For days now, I've been attempting to get the Waveshare RS485/CAN Cape to
> work on Beaglebone black.
>
> I've used kernels 4.4.x and 4.9.x-ti mainline,
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