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e*clipse · 03-22-2016, 05:56 PM

Thanks, Paul.

I've caught up to where you and Shaggy are; regarding debugging.

Can the controller work with no position feedback? Can it be forced into a v/hz mode? This would be helpful for debugging in general.

Also, I've read the sections about I/O pins and the QEI interface in both the FRM and the 6010 controller - neither mention the transition voltages for the pins, unless I missed something.

In general (from Wikipedia) the transition voltage for CMOS logic is 1/3Vdd for the low transition and 2/3Vdd for the high transition. In other words, Shaggy should see a transition in the QEI output when the pin voltage exceeds 3.333V ( his 3.8 V should be OK) I think it would be wise to increase that voltage, as Paul suggested. But it should work.

*** edit ***
Thanks for the info on the oscillator! :-)
*******

- E*clipse

03-22-2016, 05:56 PM	#2681 (permalink)
e*clipse Permanent Apprentice Join Date: Jul 2010 Location: norcal oosae Posts: 523 Thanks: 351 Thanked 314 Times in 215 Posts	Thanks, Paul. I've caught up to where you and Shaggy are; regarding debugging. Can the controller work with no position feedback? Can it be forced into a v/hz mode? This would be helpful for debugging in general. Also, I've read the sections about I/O pins and the QEI interface in both the FRM and the 6010 controller - neither mention the transition voltages for the pins, unless I missed something. In general (from Wikipedia) the transition voltage for CMOS logic is 1/3Vdd for the low transition and 2/3Vdd for the high transition. In other words, Shaggy should see a transition in the QEI output when the pin voltage exceeds 3.333V ( his 3.8 V should be OK) I think it would be wise to increase that voltage, as Paul suggested. But it should work. * edit * Thanks for the info on the oscillator! :-) ******* - Eclipse Last edited by eclipse; 03-22-2016 at 05:57 PM.. Reason: new info