MESA 5i25 + 7i76D --> Program with Python (?) or Program in Gambas (?)
21 Apr 2019 01:49 #131359
by tommylight
Replied by tommylight on topic MESA 5i25 + 7i76D --> Program with Python (?) or Program in Gambas (?)
@ Jerry
It looks like your Caps_Lock is working again, but it is set for redundancy !
Back on topic:
Mesa cards need a servo period for communicating with Linuxcnc at given intervals as they do most heavy lifting on them and just report back from time to time and accept new commands at said intervals, gathered and properly folded.
Mesa cards can output and read signals up to 10MHz, so 10 million times per second and that would be way to much information to send back and forth so it sends and receives updated data at 1ms intervals or 1000 times a second ( this can be set up to 4000 times easily ).
What you are trying to do is similar to Arduino, write code to control something directly. And even arduino has different modes of controlling pins, the usual way with the Arduino ide will give you about 1000 pulses or reads from a pin, but the direct access way will get to up to 1 Mhz. So it most probably can be done, but i do not see a reason why.
On the other side, Mesa cards are very flexible and can be programmed to do many things so bringing that capacity to an ............. it just looks like crippling all the possibilities.
You can always use halrun to do what you want without any programming, but that is part of linuxcnc and you do not want to use that.
Python is used by Linuxcnc for many things, and it is very powerful, but visual basic ???? Hell that was the reason i quit programming some 20 years ago. It was and is utterly useless.
Maybe other members can shed more light on this.
Regards.
It looks like your Caps_Lock is working again, but it is set for redundancy !
Back on topic:
Mesa cards need a servo period for communicating with Linuxcnc at given intervals as they do most heavy lifting on them and just report back from time to time and accept new commands at said intervals, gathered and properly folded.
Mesa cards can output and read signals up to 10MHz, so 10 million times per second and that would be way to much information to send back and forth so it sends and receives updated data at 1ms intervals or 1000 times a second ( this can be set up to 4000 times easily ).
What you are trying to do is similar to Arduino, write code to control something directly. And even arduino has different modes of controlling pins, the usual way with the Arduino ide will give you about 1000 pulses or reads from a pin, but the direct access way will get to up to 1 Mhz. So it most probably can be done, but i do not see a reason why.
On the other side, Mesa cards are very flexible and can be programmed to do many things so bringing that capacity to an ............. it just looks like crippling all the possibilities.
You can always use halrun to do what you want without any programming, but that is part of linuxcnc and you do not want to use that.
Python is used by Linuxcnc for many things, and it is very powerful, but visual basic ???? Hell that was the reason i quit programming some 20 years ago. It was and is utterly useless.
Maybe other members can shed more light on this.
Regards.
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