Comunicación i2c esclavo

esclavo:

# include "mbed.h"

#include <iostream>

#include<string>

# define BUFFER_SIZE 3

# define SLAVE_ADDR 0xA0

using namespace std;

I2CSlave slave (D14,D15);

RawSerial pc (USBTX, USBRX);

AnalogIn Potenciometro(A5);

DigitalOut Mderecha(A0);

DigitalOut Mizquierda (A4);

int ADCdata,datoSensor,ADCdataU,ADCdataD;

char buf [BUFFER_SIZE]="AB";

char buf2 [BUFFER_SIZE]="FG";

char buff [BUFFER_SIZE]="FG";

void leer_sensor();

bool f=0;

void motor ();

void leer_sensor();

Ticker timer;

void motor (){

Mderecha=0;

Mizquierda=0;

timer.detach();

}

int main (){

slave.address(SLAVE_ADDR);

while(1){

int i = slave.receive();

switch(i){

case I2CSlave::ReadAddressed:

slave.write(buf,BUFFER_SIZE);

pc.printf("Enviado al maestro: %s\n",buf);

f=1;

break;

case I2CSlave::WriteGeneral:

slave.read(buf,BUFFER_SIZE);

pc.printf("Leido del maestro (general): %s\n",buf);

break;

case I2CSlave::WriteAddressed:

...