You can turn on the pull-up resistors from Pd by setting the pinmode
to INPUT, then sending a [digital pin# 1( message to that pin.
.hc
On Jun 30, 2010, at 7:29 AM, Ingo Scherzinger wrote:
Problem solved!
I added this line to the firmata 2.1:
digitalWrite(pin, HIGH); // turn on pullup resistors
in this context:
case INPUT:
pinStatus[pin] = mode;
pinMode(pin, INPUT);
-> digitalWrite(pin, HIGH); // turn on pullup resistors
portStatus[port] = portStatus[port] &~ (1 << (pin - offset));
break;
exactly as described on the arduino website.
I think this definitely needs to be included in the standard firmata!
Hans, don't you think so (since you're taking care of the pduino)?
Cheers
Ingo
From: "Ingo Scherzinger" <[email protected]>
Subject: [PD] problem with arduino digital ins - Pduino-0.5beta8 /
Firmata 2.1
To: <[email protected]>
Message-ID: <821d925e7c144a22b5e3ee150bae3...@meincomputer>
Content-Type: text/plain; charset="us-ascii"
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
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