Arduino I/O with Linuxcnc

Hi

I have a running Modbus-RTU vor AVR,, Bascom implementation.

With 03 / reading registers something like 100ms update at 9600 k should be no problem.

Mike

Something like this I assume?

www.mcselec.com/index.php?option=com_con...view&id=28&Itemid=41

Hi Arceye

Yes, wasn't aware that Mark has it still on his page.
None of the links is correct anymore, think I will ask him changing text....

Those days ( > 10 years ) I was happy to find a way helping Mark to make some additional money..
His compiler is one of the best pieces of sw I ever saw and he always refused to get payed for an upgrade.....

I think he is not asked anymore for my app, and so fare, if someone of this forum needs it,
fele free to give me a pm.

Mike

Hi Arceye,

I have just found this thread and I am very interested indeed!
Would it be possible to add analogue data as well as just bits? I figure it should be but, although I am a seasoned arduino programmer, I have never tried writing anything for Linuxcnc beyond O-code subroutines. Could you perhaps point me in the right direction regarding the changes I would need to make to the linux source code?

Thanks,

Chris

Hi

Would it be possible to add analogue data as well as just bits?

Yes of course, but how you go about it probably depends upon the value ranges you will be dealing with.

There are 4 hal_type_t data types, bit, signed long int (s32), unsigned long int (u32) and float, and pins can be any of these types.

Bits are just used a lot because they easily represent switches etc.
They also can be very tightly packed in data packets of just a few bytes as per the example on page 1.

If you give me an idea of what you are trying to do, the data size etc I will have a think on it

regards

Hello,

Sorry it has taken a few days for me to reply. I have been experimenting / reading your other forum topic re Arduino pendent.

If you give me an idea of what you are trying to do, the data size etc I will have a think on it

I am working on a remote pendent very similar to the one you detail in your other post but I am intending to add either an MPG wheel or a small thumb-joystick for jogging.
I suspect that this is more relevant to the stuff in your other topic so I will head over there and ask questions.
Thanks.

I am using a MESA 5i25 - 7i76 combo, so I do in fact have enough inputs to wire the pendent directly into the 7i76, I even have an encoder input available.
However I wouldn't be able to display the machine position on the pendant that way.