Timer Mega to Due

[shuttingdown]

Hello ,

I have change my Arduino Mega to Due ( because i have change my tft screen to 7inch and screen work with 3,3V only )

In my sketch i have timer for PWM

How can convert my sketch for work on Due ?

Lines : 2462 and 2576

All sketch in attachements .

( Other problem , i have home screen but no menu , just title )

Thanks

Stilo_DUE_7inch.zip (53.1 KB)

[ard_newbie]

Serch "Timer Counter arduino DUE" and you will find numerous example sketches in this sub forum.

[antodom]

Hi there @shuttingdown,

Have a look to the tc_lib library for the DUE available at:

• GitHub - antodom/tc_lib: This is a library to take advantage of different functionalities available on Timer Counter (TC) modules in Arduino Due's Atmel ATSAM3X8E microcontrollers

And specifically to the example action_test.ino which comes with the library. This library provides you action objects using the TC (Timer Counter) modules available in DUE's ATSAM3X8E. I think it will not be difficult to modify your code using tc_lib in order to use ATSAM3X8E's timers.

I hope it helps.

[shuttingdown]

Thanks you very much for reply

I dont't be sur toi understand but i thinks :

  // TCCR3A = B00100011;        // Fast PWM on timer 3
   REG_PWM_CPRDUPD1 = B00100011;
  // TCCR3B = B11001;           //no prescalering
   REG_PWM_CPRDUPD2 = B11001;
  // OCR3A = 639;              //count to 639 (16MHz/(640-1)=25 kHz)


   //   OCR3B = Fan1PWMval;            //set PWM value for fan1
        REG_PWM_CPRDUPD3 = Fan1PWMval;
   //   OCR3C = Fan2PWMval;            //set PWM value for fan2
        REG_PWM_CPRDUPD4 = Fan2PWMval;            //set PWM value for fan2

It's ok ?

( OCR3A not modify , i don't find equality in tc_lib )

Thanks

[antodom]

Hi there again @shuttingdown,

If what you need is to generate a PWM signal have a look to pwm_lib:

• GitHub - antodom/pwm_lib: This is a C++ library to abstract the use of the eight hardware PWM channels available on Arduino DUE's Atmel ATSAM3X8E microcontroller.

This library allows you to generate PWM signals using DUE's ATSAM3X8E hardware. Have a look to the examples available in the library.

If what you what is to use the hardware timers available in DUE's ATSAM3X8E have a look to tc_lib, as I mentioned in my previous message.

I am afraid to say that the Mega has an AVR architecture and the ATSAM3X8E is an ARM Cortex M3 which is a very different architecture, different device registers, other devices, etc. Have a look to ATSAM3X8E's datasheet if you want to know more.

I hope it helps.