On 18 August 2011 20:27, John Prentice <j...@castlewd.freeserve.co.uk> wrote:

> I suspect there could be a coding problem in 3pwmgen. The documentation and
> the loaded component have "fault" as an output pin. All the description of
> it suggests it should be an input (e.g. it disables the generator, the
> invert pin alters it being active high/low etc.)

It's been a while since I looked, but I think it was correct. There is
a physical pin that the 7i39 uses to indicate that it has faulted, and
a HAL pin to echo that status, IIRC. The physical pin is an input to
the FPGA 3pwmgen, the "fault" HAL bit is an output.

> Finally, just a clarification; I presume one nets the 5i20 GPIO pins defined
> in the 7i39 manual to the "hall" inputs of the bldc component.

Yes, indeed. They are just input pins, so don't get given a special
status by the driver. (In fact, you could use them for something else
if you had a different form of motor feedback, and simply use the 7i39
for signal conditioning)

-- 
atp
"Torque wrenches are for the obedience of fools and the guidance of wise men"

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