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  • epineh
  • epineh
07 Jul 2025 11:16

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

Category: Computers and Hardware

I still have a weird issue that I am thinking is my hardware somehow, I can connect in the test GUI, see inputs, quadrature encoders and toggle outputs, but the terminal window keeps saying received data have wrong header. I have triple checked pins for conflicts. Apart from the terminal spamming that message it seems to test OK. 
Unfortunately LinuxCNC won't get out of estop, and spams wrong header size.

I am still treating it as my hardware, going to setup a different PC, I took out the Tang Nano that is in my milling machine and flashed it but the fault persists. If not the PC, I'll start swapping out PCB's from my two working machines.

Worst part is it was all working nicely last night.
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