framework-arduinoteensy-cxx20/libraries/FlexCAN/examples/Rx-SingleBus-WithObjects/Rx-SingleBus-WithObjects.ino

/*
 * Object Oriented CAN example for Teensy 3.6 with Dual CAN buses 
 * By Collin Kidder. Based upon the work of Pawelsky and Teachop
 * 
 * Both buses are set to 500k to show things with a faster bus.
 * The reception of frames in this example is done via callbacks
 * to an object rather than polling. Frames are delivered as they come in.
 */

#include <FlexCAN.h>

class ExampleClass : public CANListener 
{
public:
   void printFrame(CAN_message_t &frame, int mailbox);
   bool frameHandler(CAN_message_t &frame, int mailbox, uint8_t controller); //overrides the parent version so we can actually do something
};

void ExampleClass::printFrame(CAN_message_t &frame, int mailbox)
{
   Serial.print("ID: ");
   Serial.print(frame.id, HEX);
   Serial.print(" Data: ");
   for (int c = 0; c < frame.len; c++) 
   {
      Serial.print(frame.buf[c], HEX);
      Serial.write(' ');
   }
   Serial.write('\r');
   Serial.write('\n');
}

bool ExampleClass::frameHandler(CAN_message_t &frame, int mailbox, uint8_t controller)
{
    printFrame(frame, mailbox);

    return true;
}

ExampleClass exampleClass;

// -------------------------------------------------------------
void setup(void)
{
  delay(1000);
  Serial.println(F("Hello Teensy Single CAN Receiving Example With Objects."));

  Can0.begin(500000);  

  //if using enable pins on a transceiver they need to be set on
  pinMode(2, OUTPUT);
  digitalWrite(2, HIGH);

  Can0.attachObj(&exampleClass);
  exampleClass.attachGeneralHandler();
}


// -------------------------------------------------------------
void loop(void)
{
  delay(1000);
  Serial.write('.');
}