Thank you all for your thoughts regarding this issue. > > On Thu, 2023-04-13 at 16:28 -0500, Rick Snow wrote: > >> I am helping someone use pd with an arduino mega.? They would like to >> use all of the digital output pins.? I?ve used pduino in the past in >> this way and not had trouble,? > > Also with a Mega? > >> but I seem to be bumping into something now. > > What version of pduino are you using? Most current is 0.8. > > Also, if an older version of pduino worked fine with the Arduino Mega, > what version was that?
I have used pduino in the past with a mega. I do not remember if I used the specific pins in question previously. I am using pduino .8 and standardFirmata (most recent). I am using a Mac with a usb c dongle….I have tried it on a pc laptop and had the same problem. I have used a couple of different brand new megas for testing. One test run revealed the following. Process: I turn on all the pins with a 250 ms delay in sending messages “pinMode 2 output” -> “pinMode 53 output”. Then I check each individual pin with a multimeter. The results are: Pins 2-23 work fine Pins 24-30 turn on but do not turn off Pins 31-38 do not turn on or off Pins 39-53 work fine I’ve done this a few times and had different sets of pins working/not working but they are generally in the areas above with pins 24-38 the most problematic. >> >> I started by using the arduino help patch.? StandardFirmata sketch on >> the Mega.? Connection via usb works fine. >> >> I set all the pins to output by sending "pinMode 2 output? -> >> ?pinMode 45 output? messages to the arduino object. No errors. >> >> Then, I use the messages ?digital 2 1? ?digital 2 0? -> ?digital 45 >> 1? ?digital 45 0? sent to the arduino object to check the pins.? When >> checking with a multimeter I am not able to get output from pins 2- >> 7.? I do get output from 8-20.? Between 20-40 some pins work and >> others not at all.? Other pins will turn on but not turn off. > > What happens if you specifically send 'pinMode 45 output, digital 45 > 1'? Or you use any other pin that seems to be not working correctly > with your setup. When trying this method directly (without trying to turn on all the pins first) the working pins all work. When trying with a “non-working pin”, if I do this right after opening the patch, I can do this with at least 1 pin and it will work. Sometimes, I can check up to 3-4 “non-working pins” with this method and they will work, but then no more “non working pins” will work, and the previously checked non-working pins will stop working. Working pins will work even after the “non-working pins” stop responding. Restarting pd will allow this behavior to be replicated. > Also, there is 'pinState' message for querying the > current state and there is the 'capability' message that triggers a > report of all supported modes of all pins. So, I would like to know if > the non-working pins report of themselves to support 'output' mode. > Then, if you set their 'pinMode' to 'output', do they actually report > their 'pinState' as 'output'? pinState messages will show what the multimeter shows with all working pins. pinState will sometimes show 1 for non working pins when the multimeter shows 0. >> Checking the pins using a simple blink sketch shows all the pins >> working fine. > > Ok, so you can be sure the board is working. > >> Any advice would be greatly appreciate! > > I don't own an Arduino Mega and I don't know how well [pduino] is > tested with that board. I certainly haven't tested it ever.? > This makes it hard for me to reproduce the problem. If you can give a > hint that the problem is in the software, that would help. My intuition is that the messaging for these pins gets corrupted somehow after a certain number of pinMode messages are sent to the arduino object, but I really know absolutely nothing about the serial port/sysex side of this. Thank you all again for your thoughts! Ultimately this person would like to control about 40 solenoids with an arduino mega and a pd patch. Cheers, Rick _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list
