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

Looking at the manual for this drive I think I can set the control inputs to the terminals and the frequency input to the modbus, I will have to try it later this week.

 

 


 

I still have to port it to the main branch, but it already works in dev.

www.youtube.com/shorts/7ieYCgcRN9Q

Nice! Is that using the rs485 serial output on the RIO board?

I tested it with an IceBreaker board via RS485, but it makes no difference.

for the VFD-Simulation, a USB Modbus adapter is connected to the PC, along with the Python script from above.

Dear Oliver,
I got my Setup of RPI5,OlimexICE40EVB working in the test-gui.
(3 stepdir plugins, and some bitinputs) These working all in the test gui.
I did the halcompile step. starting linuxcnc with the created ini configuration.
The linuxcnc app cannot be switched on,
it reports USRMOT: ERROR: command timeout.
I'm a linuxcnc newbe so I would appreciate some hints how I could proceed to get linuxcnc running.
Thank you for your time!
regards Robert

Hi Robert,
can you please post your json config and maybe the complete error output ?!?

Hi Oliver, thank you! I post the configuration (json.txt), linuxcnc_print.txt output and a copy of the terminal output linux_cnc_out.txt

I generall I know that I have to do some HAL configuration to (software) wire the machine together. What for the beginning is not so easy to know is what exactly has to be done. I see what your rio-setup does, and there is also the possibility to make linuxcnc HAL net connections in the setup, but what is necessary to start with..

I'm looking forward to hear from you,
regards, Robert

PS: do you run robot os on RPI5 Debian Trixie?

Benutzt du einen RPI5 ?
dann trag mal bitte diese option mit ins json ein:

```
"boardcfg": "Olimex-ICE40HX8K-EVB",
"protocol": "SPI",
"rpi5": true,
"flashcmd": "/home/cnc/prog/olice40prog/spiflash.py -b rio.bin",
```
ansonsten bin ich etwas ratlos.

an welchem CS pin hast du das board ?

per default benutzt RIO CE0 an pin 8:
```
#define SPI_PIN_MOSI 10
#define SPI_PIN_MISO 9
#define SPI_PIN_CLK 11
#define SPI_PIN_CS 8
```

Lieber Oliver,

vielen Dank, die option rpi5:true hat geholfen, jetzt funktioniert die Axis App!
Nun kann ich mich in die Konfiguration vertiefen.

sei lieb gegruesst,
Robert

Lieber Oliver,

ich benoetige noch einmal Deine Aufmerksamkeit. Mir will es nicht so recht gelingen eine vernuenftige Geschwindigkeit und Schritteweite einzustellen.
Ich habe Schrittmotoren welche im Fullstep Mode 60 Schritte fuer eine Umdrehung benoetigen. Eine Undrehung erzeugt einen Vorschub von 5 mm. Wenn ich eine maximale Geschwindigkeit von 5mm/sec einstellen moechte, welche Paramater sind fuer die Stepdir Konfiguration zu setzen? Ich dachte Scale bekommt einen Wert von 12 (60Steps/5mm) = 12 Steps/mm, und MaxVelocity 5(mm/s) - Aber so richtig will es nicht gelingen, der Motor flattert nur...
Ich danke Dir, liebe Gruesse,
Robert