PIC I2C slave setup

Question

This is asking for a lot and I've posted on a previous forum my problem. Help would be greatly appreciated! Please refer to my current attempt below: The problem is that I don't detect the PIC controller over I2C at all...

#include <xc.h>
#include <stdio.h>
#include <stdlib.h>
#include "pic16f18857.h"

#define _XTAL_FREQ 32000000 // Define the frequency for __delay_ms()

void main(void) {
    // Initialize I2C
    TRISCbits.TRISC3 = 1; // SDA pin as input
    TRISCbits.TRISC4 = 1; // SCL pin as input
    SSP1ADD = 0x50 << 1; // Set slave address (0x50)
    SSP1STAT = 0x00; // Slew rate control disabled
    SSP1CON1 = 0x36; // Enable I2C, Enable 7-bit slave address, Enable SCL and SDA pins
    SSP1IE = 1; // Enable I2C interrupt
    PEIE = 1; // Enable peripheral interrupts
    GIE = 1; // Enable global interrupts
    
    // Initialize serial communication
    TX1STAbits.TXEN = 1; // Enable transmitter
    RC1STAbits.SPEN = 1; // Enable serial port
    TX1STAbits.SYNC = 0; // Asynchronous mode
    TX1STAbits.BRGH = 1; // High-speed baud rate
    BAUD1CONbits.BRG16 = 0; // 8-bit baud rate generator
    SP1BRGL = 207; // Set baud rate to 9600
    
    while (1) {
        // Your main loop code here
    }
}

void __interrupt() ISR(void) {
    if (SSP1IF) {
        if (!SSP1STATbits.R_nW) { // Check if this is a write operation
            unsigned char receivedData;
            if (!SSP1STATbits.D_nA) { // Check if this is an address byte
                SSP1CON1bits.CKP = 0; // Release clock
                receivedData = SSP1BUF; // Read and clear buffer
            } else {
                receivedData = SSP1BUF; // Read and clear buffer
                // Process the received data
                printf("Received message: %c\r\n", receivedData);
            }
            SSP1IF = 0; // Clear interrupt flag
            SSP1CON1bits.CKP = 1; // Release clock
        }
    }
}