uart on 3hc

oliof

@scumdead you configure it with M575 and then connect the serual device https://docs.duet3d.com/User_manual/Reference/Gcodes#m575-set-serial-comms-parameters

dc42

@scumdead currently there are no firmware facilities to use UARTs on expansion boards, other than in debug builds for debug output.

scumdead

Thank you for your answers, the 2 uart ports on my 6hc card are already busy. Too bad we can't use all 3 of the 3hc...
Thanks.

oliof

@scumdead sorry I misread yournoriginal request

dc42

@scumdead what is it that you need additional UARTs for?

scumdead

I would like to connect an MP3 player card, to announce the status of the printer for my visually impaired wife. This card connects to a UART port.

scumdead

Are there plans to make these ports accessible soon?
Thanks.

scumdead

I dreamed, or did the message indicating that uart ports were currently not supported on expansion cards disappear?
( in 3hc documentatiln)
Thanks

droftarts

@scumdead The 3HC documentation hasn't changed since August, but I have just updated it to say that UART is not currently supported. Other expansion/toolboard pages say that UART/I2C are not supported, and I've gone through and updated them, too. These wiki pages have always said that I2C is not currently supported; I2C is currently not supported by RRF on any Duet 3 hardware, though there are Github feature requests for this.

UART support on the 3HC is theoretically possible; the 3HC uses the same MCU as the Mini 5+, which does have two of the three UARTs available. However, unless it is easy (that's for @dc42 to decide) it is unlikely to happen any time soon. I have created a Github feature request for UART/I2C support for expansion/tool boards:
https://github.com/Duet3D/RepRapFirmware/issues/1053

Ian

droftarts created this issue in Duet3D/RepRapFirmware

open [Feature request]: UART and I2C support for Duet 3 expansion/tool boards #1053

scumdead

Good morning,
Thanks for the response, I'll be patient.

Thanks.