Error when building latest 3D printer firmware

maxgerhardt · September 7, 2019, 8:50pm

First google result for multiple definition of '__vector_23':

Looking at the code that doesn’t build, there is the ISR

prusa3d/Prusa-Firmware/blob/5bb510dd2a1972f7b05612ce08dbd7771e3b61c5/Firmware/heatbed_pwm.cpp#L92-L95


      
          ISR(TIMER0_OVF_vect)          // timer compare interrupt service routine

          {

          	switch(state){

          	case States::ZERO_START:

This file is non-existant for your working 3.7.2 version, explaining why it works.

This issue with the new version is also already referenced in the project you linked to

With the solution

Which points to this Arduino core / board definition

https://raw.githubusercontent.com/DRracer/Arduino_Boards/master/IDE_Board_Manager/package_prusa3d_index.json

Their core’s wiring.c has the “fix” which is surrounding the TIMER0 vector used by millis() with #ifdef 0. Read the comment for explanation.

github.com

3d-gussner/Arduino_Boards/blob/33324bf63fd1585e2dc4416888906e75101a5f9c/IDE_Board_Manager/prusa3drambo-1.0.1/cores/rambo/wiring.c#L42-L71


      
          // As of Prusa Firmware 3.8 we need to disable the Arduino's hardcoded TIMER0_OVF_vect
          // to be able to replace it with our own implementation for HW PWM heatbed control.
          // That's also the one and only reason we need to define our own "board"
          // for the Arduino IDE.
          #if 0
          
          
#if defined(__AVR_ATtiny24__) || defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__)
          ISR(TIM0_OVF_vect)
          #else
          ISR(TIMER0_OVF_vect)
          #endif
          {
          	// copy these to local variables so they can be stored in registers
          	// (volatile variables must be read from memory on every access)
          	unsigned long m = timer0_millis;
          	unsigned char f = timer0_fract;
          
          
	m += MILLIS_INC;
          	f += FRACT_INC;
          	if (f >= FRACT_MAX) {

This file has been truncated. show original

So what you need to do is import the same core and variant definition as this project commands you to do. That is,

go download https://github.com/3d-gussner/Arduino_Boards/tree/master/IDE_Board_Manager/prusa3drambo-1.0.1
go to your <home folder>/.platformio/packages/framework-arduinoavr folder (<home folder> on Windows is C:\Users\<Username>\)
in cores, add a new folder rambo and copy-paste the contents of the core
in variants, go to the rambo folder and overwrite the .h file with the one found here into the folder
add the following lines to the platformio.ini to adjust the used Arduino core

board_build.core = rambo

(board_build.variant must not be altered because it already is rambo)

(this is all documented in the documentation and board’s JSON file)