LinuxCNC-RIO - RealtimeIO for LinuxCNC based on FPGA (ICE40 / ECP5)

I am switching LinuxCNC from an old PC to RaspberryPI + Tango compatible board.
I see that riocore has support for HY_VFD and I want to use it. After resolving simple issues I can get a serial signal out of the Tang Nano, but no connectio to the VFD yet. I guess I will need a TTL to RS485 brekout board. Will this one do?
Last time that I made changes to the HY_VFD configuration it cost me a burnt spindle, so now I'm trying to learn more and if possible from other's experience. I will appreciare any help and suggestions.
Thanks!
-- Itai
 

cool board, but why does it look better than mine, it's a schame

i using this converter-boards:
WINGONEER 5PCS 5V MAX485 / RS485 Modul TTL zu RS-485 MCU Entwicklungsboard

www.amazon.de/gp/product/B06XHHWLMW

i think it's better to use an converter with DE/RE pins to prevent reading the own sended data.
you have to bridge this two pins and configure 'tx_enable' to it in the json-config.

you can look at the octobot config and schematics: github.com/multigcs/riocore/tree/main/riocore/boards/OctoBot

itai wrote:

I am switching LinuxCNC from an old PC to RaspberryPI + Tango compatible board.
I see that riocore has support for HY_VFD and I want to use it. After resolving simple issues I can get a serial signal out of the Tang Nano, but no connectio to the VFD yet. I guess I will need a TTL to RS485 brekout board. Will this one do?

Last time that I made changes to the HY_VFD configuration it cost me a burnt spindle, so now I'm trying to learn more and if possible from other's experience. I will appreciare any help and suggestions.
Thanks!
-- Itai
 

Is your vesion of the Tango board a modified PCB? and is there Kicad or PCB repository.  Just so I can compare the difference with Olivers version.
Many thanks 

no idea if it is up to date:
github.com/itain/Tango-PCB-Kicad

I could not use Eagle so I have remodeled Oliver's OCB in KiCad.
I use different connectors. Noved the 5 outputs to the oppesire sides and have 5V/24V selection on all inputs (also wih option to change resisor values). Also added some capacitors.
If I make a new version I would use 6 pin JST to get 5V from the Raspberry PI. Possibly add MAX485+protection circuit to the board.
If there is demand I can put the Kicad files on github.

meister wrote:

no idea if it is up to date:
github.com/itain/Tango-PCB-Kicad

Thanks! I forgot it was already on Github! This is the latest that was sent to create the PCB. As I wrote, If I make a new version I would make some changes.