![]() However, I cannot use the given pins by the encoder (31/33) with these PCINs, means I have to find a solution to poll them somehow. ![]() Try 10K to start and if the switch data is unreliable, go to smaller resistors (minimum 1K). If the internal pullups dont cut it add external pullups. For longer wires a harder (less resistance) pullup is needed. Not sure why it does not work with Y_MIN_PIN (14) since it is PCINT10, I did try it again, but without success. The internal pullup resistors are 20K to 50K ohms, thus pretty weak. It looks as if the library does not support to use INT7:0, this is the reason why it did not work with with X_MIN_PIN (3). Thanks to all of you for all your help to improve my understanding how these pin change interrupts work. Pin 10 is assigned to heaters and fans mosfet on the RAMPS 1.4 so I cannot use it, but I tried it with the pin A9 and it worked fine there. Now I understand that PCINT23:0 means a range of pins from PCINT0 to PCINT23, but it covers not all the pins on the ATmega2560.īTW, there is a document which explains the megaAVR interrups in general pretty good. and that they're different than "pin change interrupts", which work on all (or nearly all) of the pins. I picked that up there, but it did not notice that it was probably meant for a Atmega328 and not all ports of the ATmega2560 are covered by PCINTs. "The External Interrupts are triggered by the INT7:0 pin or any of the PCINT23:0 pins" The beeper (led) works fine if I uncomment the line in the loop code.Īny idea what could cause this issue that the interrupt does not work? Hello, ive found program written for arduino nano, but I have arduino mega, could anyone explain to which pin on arduino mega I should connect everything Program says: const uint8t MELBUSCLOCKBITINT 1 //interrupt numer (INT1) on DDR3. I have tried the ports X_MIN_PIN (INT5), Y_MIN_PIN and BTN_ENC, but none of these work. Arduino nano pinout vs arduino mega 2560. This is my test code (slightly modified sample code) for the library which does not work for some reason: #include Tracing that problem back I found out, that it seems the problem comes from PCINT library which does not trigger the interrupt. I actually wanted to create an LCD menu which get controlled by the encoder, but then I noticed that the encoder did not work. My used hardwarea is an Arduino Mega with a RAMPS 1.4 shield and a RepRap Discount SmartController LCD including an encoder and button. Just venting by the way, and hoping that someone else finds this in their search for the true interrupt numbers.I did try to run a simple sample code from the Pin Change Interrupt Library (PCINT) library, but for some reason it did not trigger the interrupt. It just seems to me a tiny asterisk, with a note somewhere near the bottom could have saved me a lot of aggravation. ![]() Therefore, I have to interpret 24 PWM signals. I’m trying to use the Arduino mega as a voter to determine if the flight controllers agree and which signals to send to the motors. The quad has 8 motors (2 on each arm) and 3 flight controllers. My question, WHY is there still NO MENTION of this fact in the PINOUT diagrams of the DATASHEET (Digital I/O Pin 2, PWM, PE4, Pin6, labeled "(OC3B/INT4)PE4")? I know if i read the DATASHEET from cover to cover, I might find the answer (or at least figure it out), but my FIRST goto source is internet search, and second is a drawing (because it is a good overall reference, although not perfect). I’m making a quadcopter with redundant flight control systems. I finally found a discussion in 2017 on GITHUB). I was using INT4 and INT5 for Pins2 and 3 respectively, when I should have been using INT0 and INT1 (I got the INT4 and 5 info from the MEGA2560 DATASHEET Pinout, but the INT0 and 1 required extensive searching. After extensive searching, I found out that I was NOT USING THE CORRECT INT number. I came across the need to use Interrupts on digital Pins 2 and 3, but couldn't get my code to work.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |