Controlling Pullup Resisitors

Another day, another challenge.

How do you turn on the pullup resistors from Flash?  I have attempted sending an OSC message.  It does not throw an error in mchelper but the io port is still defaulting to low.

mcflash.send("/io/56/pullup", [1] );

Interesting.  Mine are not defaulting low.  That is actually what I would prefer.  Instead I get some defaulting to low and some floating high.  Any ideas?

Eh - I think I had in mind the firmware code I've been working on, which has not yet been released.  Sorry bout that.

Ideally the pins would be cleared on board startup - for now, maybe your best bet is to actively clear them in your application code.

I tried doing a manual reset of the pins when starting up my connection.  I used the following code for each pin.

mcflash.send("/io/pin#/active", [1] );

mcflash.send("/io/pin#/pullup", [0] );

I still have floating highs on about half of the io pins.  If I reverse the pullup setting to 1 there is no change in which pins are low and which are high.  

You'll need to set the value to 0 or 1 to turn it on or off once it's active - /io/#/value 0 or /io/#/value 1

I am using these as inputs.  That would mean I should not set them to a value right?  I need them to pull down to zero unless my external input drives the pin high.  That is the way most boards with internal pull down resistors work.

You may have a look at my findings regarding the pull-ups for outputs

It is in the forum under hardware title : stepper and ethernet issues

Port 0 active 1 setting depends on toggling port 1 first before port 0 can be toggled.

Fred