Mesa 7i92 set all pins to predefined state at exit
09 Jul 2016 01:57 #77202
by Shu
Mesa 7i92 set all pins to predefined state at exit was created by Shu
Is it possible to set outputs to low/high/high impedance when LinuxCNC is not running and keep them in that state until LinuxCNC takes over?
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09 Jul 2016 02:28 #77203
by PCW
Replied by PCW on topic Mesa 7i92 set all pins to predefined state at exit
The initial state (and state when the watchdog bites) is all high
(Pulled up inputs)
(Pulled up inputs)
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09 Jul 2016 02:29 - 09 Jul 2016 02:30 #77204
by Shu
Replied by Shu on topic Mesa 7i92 set all pins to predefined state at exit
Right, can that be changed to all low/all high impedance/chosen pins low? Without using external resistors..
Last edit: 09 Jul 2016 02:30 by Shu.
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09 Jul 2016 02:32 - 09 Jul 2016 18:25 #77205
by PCW
Replied by PCW on topic Mesa 7i92 set all pins to predefined state at exit
No, its always high at powerup/watchdog bite
I should add that it is possible to have a FPGA configuration that pre-defines pins as outputs
but these still will not be driven during the FPGA configuration loading time so its better to
either use the intended active low mode of the 7I92 outputs or (better) to implement a charge pump
I should add that it is possible to have a FPGA configuration that pre-defines pins as outputs
but these still will not be driven during the FPGA configuration loading time so its better to
either use the intended active low mode of the 7I92 outputs or (better) to implement a charge pump
Last edit: 09 Jul 2016 18:25 by PCW.
The following user(s) said Thank You: Shu
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