Problems connecting PIC 18F4550 and Arduino Mega

[janeza30]

Hi everyone,

I'm having issues trying to communicate my PIC18F4550 as Slave with my Arduino Mega as Master over I2C. The idea is to read a byte over Arduino Serial and send it to turn on and off a LED.
Please if anyone can help, I will seriously appreciate it.

Here is my PIC code:
#include <18f4550.h>
#fuses HS, WDT, NOPROTECT, NOPUT, NOPBADEN
#use delay (crystal = 4000000)
#use i2c(SLAVE, SDA = PIN_B0, SLOW, SCL = PIN_B1, NOFORCE_SW, ADDRESS = 0xA0)

char data = 0;

void main() {
set_tris_b(0xFF);
set_tris_c(0x00);
while(1){
if(i2c_poll()){
data = i2c_read(2);
if(data == 1) output_high(PIN_C0);
else if(data == 0) output_low(PIN_C0);
}
}
}

Im using CCS as IDE.

Here's my Arduino code:

#include <Wire.h>

char data = -1;

void serialEvent() {
data = Serial.read();
Serial.println(data);
}

void setup() {
Serial.begin(9600);
Wire.begin();
}

void loop() {
if(data > -1){
Wire.beginTransmission(0xA0);
Wire.write(data);
Wire.endTransmission();
data = -1;
}
}

Here's my circuit, including some I2C debug info:

Thanks in advance!