Mock Wire.h

[ianfixes]

Mock Wire.h

[ianfixes]

It looks like the maximum depth of this mock will be to support the example shown here: https://www.arduino.cc/en/Tutorial/SamdSercom

Note the following (apparently internal) features that will need to be mocked somehow.

• pinPeripheral() function, whose use below may or may not contain a typo
• TwoWire(something, something, something) constructor
• &sercom3 variable of some sort
• SERCOM3_Handler -- not sure if this is some magic name

#include <Wire.h>
#include "wiring_private.h"

TwoWire myWire(&sercom3, 0, 1);   // Create the new wire instance assigning it to pin 0 and 1

void setup()
{
  myWire.begin(2);                // join i2c bus with address #2

  //  use the internal function that reassigns the pins
  pinPeripheral(0, PIO_SERCOM);   //Assign SDA function to pin 0
  pinPeripheral(1, PIO_SERCOM);   //Assign SCL function to pin 1

  myWire.onRequest(requestEvent); // register event
}

void loop()
{
  delay(100);
}

// function that executes whenever data is requested by master
// this function is registered as an event, see setup()
void requestEvent()
{
  myWire.write("hello "); // respond with message of 6 bytes
                          // as expected by master
}

// Attach the interrupt handler to the SERCOM
extern "C" {
  void SERCOM3_Handler(void);

  void SERCOM3_Handler(void) {
    myWire.onService();
  }
}

[ianfixes]

Given that this mock exists, I'm closing this issue
https://github.com/Arduino-CI/arduino_ci/blob/master/cpp/arduino/Wire.h