hostmot2 oneshot bitfile help

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21 May 2023 22:40 #271887 by PCW
Replied by PCW on topic hostmot2 oneshot bitfile help
Do you have standard step/dir drives also?

RC servos normally just need one signal each (the PWM signal)

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23 May 2023 11:32 - 23 May 2023 11:51 #272015 by tincho80
I do not have step/dir servo-drives or servo-motors.
I just have the mesa card 7i76e+7i85s (from a different project) and a bunch of standard RC-Servos, featuring 3 leads, beenig GND, 5V and PWM-Signal.
At the moment I just don't understand, how to bring out the pwm-signal and on which pins. is a special bit-file needed?
Last edit: 23 May 2023 11:51 by tincho80.

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23 May 2023 13:11 #272017 by PCW
Replied by PCW on topic hostmot2 oneshot bitfile help
Yes, a special bit file would be needed.

For example here is a 7I76E bitfile with 2 stepgens (0 and 1) and 6 RCPWMgens
(0 ..5) on the last three stepgen connectors of the 7I76E:

 

File Attachment:

File Name: 7i76e_7i76x1_6rcd.zip
File Size:98 KB
Attachments:
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23 May 2023 21:37 - 23 May 2023 21:37 #272058 by tincho80
thank you very much!
How do you do that? Rocket science? Software needed or pure coding?
Last edit: 23 May 2023 21:37 by tincho80.

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23 May 2023 22:12 #272061 by PCW
Replied by PCW on topic hostmot2 oneshot bitfile help
Basically editing one source file to bring in the correct modules
and define the pinout and then re-compile...
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24 May 2023 08:13 - 24 May 2023 08:29 #272081 by tincho80
Ahh, sound like fun! Many Thanks!
For me, to do the same, do I need more than what is described here ( wiki.linuxcnc.org/cgi-bin/wiki.pl?Editing_MESA_Bitfiles)?
And the "source file" you mentioned is a standard bit-file from the MESA-net page of my card?
Can I brick my MESA-Card if I load a crapy bit-file with mesaflash?
The process described in the linked page, is it still applicable? New Version 14.7 of Xlinx Design Suite not needed?
 
Last edit: 24 May 2023 08:29 by tincho80.

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24 May 2023 18:10 - 24 May 2023 18:16 #272093 by PCW
Replied by PCW on topic hostmot2 oneshot bitfile help
 Yes, that page is still applicable (I'd get 14.7)The source is a PINXXXX.vhd file that
is in the source subdirectory of the 7I76E distribution zip file.

Here is the one changed file (other than files changed to add this to the sources)
that was used to build the 7I76E RCPWM firmware:

 

File Attachment:

File Name: PIN_7I76x1...D_51.txt
File Size:10 KB
Attachments:
Last edit: 24 May 2023 18:16 by PCW.
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