Compilation error when using add_event_detect()

[mbaenfer]

Hi,

I'm trying to use this library on Jetson Xavier with JetPack 4.6 and ROS-Melodic. It works fine, but...

When I add the function add_event_detection() to my code I always get compilation errors. Even with your example "button_interrupt.cpp".

So I made a new small test code:

#include <iostream>
#include <string>
#include <JetsonGPIO.h>
#include <signal.h>

bool shutdown = false;

void signalHandler(int s)
  {
  shutdown = true;
  }

void callback_fn(const std::string& channel)
  {
  std::cout << "Callback called from channel " << channel<< std::endl;
  }

int main()
  {
  signal(SIGINT, signalHandler);  

  GPIO::setmode(GPIO::BOARD);
  
  GPIO::setup(12, GPIO::IN);
 
  GPIO::add_event_detect(12, GPIO::RISING, callback_fn); // also tried GPIO::Edge::RISING
  
  while(!shutdown)
    {
    //
    }
  
  GPIO::remove_event_detect(12);
  
  GPIO::cleanup();
  
  return 0;
  }

When I remove add_event_detection(...) I can compile and run the program without errors. Here is a screenshot of the compilation error message:

Does anyone know how to fix this?

Greetings
Marcel

[pjueon]

From your error:

static_assert(... "Callback return type: void, argument type: int");

The callback argument type changed in the latest version (1.2.0).
(old version: int, latest version: const std::string&)

I'm assuming that you installed an old version, and trying the new example code.

Could you re-install the library and try it agian?

[mbaenfer]

Yeah, thank you! That was the problem.

I was using Version v1.0.1, installed it some weeks ago. Now updated to v1.2.0 I can run and compile my code.

Greetings
Marcel