search

MCUdude / MegaCore

Arduino hardware package for ATmega64, ATmega128, ATmega165, ATmega169, ATmega325, ATmega329, ATmega640, ATmega645, ATmega649, ATmega1280, ATmega1281, ATmega2560, ATmega2561, ATmega3250, ATmega3290, ATmega6450, ATmega6490, AT90CAN32, AT90CAN64 and AT90CAN128
Other
384 stars 118 forks source link

UART (on Pins PD2/PD3) on ATmega128 #153

Closed leonclear closed 3 years ago

leonclear commented 3 years ago

I have some code running on a Mega2560 pro board that I

wanted to port to a Mega128 using Megacore to further

integrate it in a HW design I have.

  1. How to use the second (hardware-)UART (on Pins

PD2/PD3) on ATmega128 ? show an example please.

how to access the port can i use the code?:

Serial2.begin(9600); int thisByte = 33; int secondByte = 37; Serial2.print(", dec: "); Serial2.println(thisByte+secondByte);

  1. show an example for use attachInterrupt(); attachInterrupt(0). for pin pe2

attachInterrupt(1). for pin pe3

  1. will the libraries work:

https://www.arduinolibraries.info/libraries/one-wire https://www.arduinolibraries.info/libraries/dallas-temperature

to connect ds18b20.

  1. is it pwm pin : 12,13,14,15, 4, 5 ,53 ?

  2. will the function analogWrite(12); work correctly?

show an example for use analogWrite(12);

MCUdude commented 3 years ago

This sounds like a student assignment to me. Why don't you just try it and see if it works?

How to use the second (hardware-)UART (on Pins PD2/PD3) on ATmega128 ? show an example please.

You can use the hardware serial pins on pin PD2 and PD3. This is Hardware serial 1, and you use Serial1.begin();.

show an example for use attachInterrupt(); attachInterrupt(0). for pin pe2 attachInterrupt(1). for pin pe3

Pin PE2 does not have interrupt capabilities. Neither does PE3. See pinout picture below.

will the libraries work...

Yes, but not on pin PF0 - PF7. See #102 for details

is it pwm pin : 12,13,14,15, 4, 5 ,53 ?

Pin 53 is not available on ATmega128. There are PWN capabilities on pin 3, 4, 5, 12, 13, 14 and 15.

will the function analogWrite(12); work correctly?

No, the ATmega128 only has 8 analog inputs.

tomaskovacik commented 3 years ago

will the function analogWrite(12); work correctly?

No, the ATmega128 only has 8 analog inputs. analogWrite is output (PWM), no?

MCUdude commented 3 years ago

My bad.

will the function analogWrite(12); work correctly?

Yes, this will work since pin 12 has PWM capabilities

leonclear commented 3 years ago

Please , show an example for use attachInterrupt(); for some pin. Is function attachInterrupt(4); for pin PE4 is correct?

MCUdude commented 3 years ago

Please , show an example for use attachInterrupt();

It isn't my job to demonstrate standard Arduino functionality. You can read about interrupts here: https://www.arduino.cc/reference/en/language/functions/external-interrupts/attachinterrupt/

Is function attachInterrupt(4); for pin PE4 is correct?

Yes, that will work, but it is recommended to use attachInterrupt(digitalPinToInterrupt(4), interruptFunction, mode)