You got me interested. I didn't know about an internal pull-up resistore, but I asked in the #arduino channel and it seems there indeed is such a thing.
<rdz> hi all. is there an internal pull-up resistor for digitalIns? <scgtrp> (digitalRead btw) yes, pinMode(n, INPUT); digitalWrite(n, 1); I can't test with [arduino] right now, but it seems you could do: [pinMode $1 0( | | [digital $1 1( | / [arduino] Tell us if that really works. Roman On Wed, 2010-06-30 at 12:31 +0200, Ingo Scherzinger wrote: > Hi, > > I'm having a problem with the arduino digital ins. > According to the arduino website there are pull up resistors inside the > ATmega that get activated automatically when the digital ins are turned on. > This is not the case here with the Pduino-0.5beta8. > When I connect ground to the pin it switches to 0 as expected. When I > disconnect the wire it starts switching randomly between 0 and 1. If I use > an "external" pullup resistor everything works as expected again. > I just read the help file from the pduino and it states that this is the > normal behaviour which shouldn't be the case with the internal pullup > resistors activated. > What's the problem with these internal pullup resistor not getting turned > on? > Is there a command I can (or have to) send to the arduino? > > I've tested this with a diecimila and duemilanove and Ubuntu 10.4 and > Windows XP. > Maybe there is a problem with Pduino or Firmata 2.1? > > Any ideas appreciated! > Cheers, Ingo > > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
