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" ingo@miamiwave.com Subject: [PD] problem with arduino digital ins - Pduino-0.5beta8 / Firmata 2.1 To: pd-list@iem.at Message-ID: 821D925E7C144A22B5E3EE150BAE3EAC@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
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" ingo@miamiwave.com Subject: [PD] problem with arduino digital ins - Pduino-0.5beta8 / Firmata 2.1 To: pd-list@iem.at Message-ID: 821D925E7C144A22B5E3EE150BAE3EAC@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
turnedon.
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
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Looking at things from a more basic level, you can come up with a more
direct solution... It may sound small in theory, but it in practice,
it can change entire economies. - Amy Smith
Thank you, Hans!
I did that now after Roman suggested it. Turning all pullup resistors on by default is not a good idea, anyway. Power consumption could go much higher up than USB could actually provide (no prob here since I'm using external power).
BTW, it would be a good idea to update the pduino help file so others can find that information.
Ingo
-----Ursprüngliche Nachricht----- Von: Hans-Christoph Steiner [mailto:hans@at.or.at] Gesendet: Donnerstag, 1. Juli 2010 03:37 An: Ingo Scherzinger Cc: pd-list@iem.at Betreff: Re: [PD] problem with arduino digital ins - Pduino-0.5beta8 -
solved!
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" ingo@miamiwave.com Subject: [PD] problem with arduino digital ins - Pduino-0.5beta8 / Firmata 2.1 To: pd-list@iem.at Message-ID: 821D925E7C144A22B5E3EE150BAE3EAC@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
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management ->
http://lists.puredata.info/listinfo/pd-
list
Looking at things from a more basic level, you can come up with a more direct solution... It may sound small in theory, but it in practice, it can change entire economies. - Amy Smith
-
Hans-Christoph Steiner -
Ingo Scherzinger