ведомые устройства мешают при совместном использовании линии шины i2c

Я новичок в микроконтроллерах и использую PIC18F4620 (ведущий) для связи с датчиком цвета TCS34725 (ведомый) и часами реального времени DS1307 (ведомый, на плате) через I2C. Прямо сейчас я испытываю какое-то вмешательство между этими двумя. Если я запускаю любой из них по отдельности, а другой не подключен к порту, то он работает нормально. Если другой подключен, даже не проинициализировавшись, то зависает в процессе чтения. Их подчиненные адреса не совпадают, поэтому я не понимаю, почему это происходит. Это код датчика цвета.

 /* Initialize LCD. */
initLCD();

I2C_Master_Init(100000); //Initialize I2C Master with 100 kHz clock

while(1){
    /*read the id */
    I2C_Master_Start();
    I2C_Master_Write(0b01010010);
    I2C_Master_Write(0b10010010);
    I2C_Master_RepeatedStart();
    I2C_Master_Write(0b01010011);
    id = I2C_Master_Read(NACK);
    I2C_Master_Stop();   
    __delay_ms(200);

    /* Configure the RGBC Time register */
    I2C_Master_Start();
    I2C_Master_Write(0b01010010);
    I2C_Master_Write(0b10000001);
    I2C_Master_Write(0);
    I2C_Master_Stop();
    __delay_ms(200);

    /* Configure the Control register */
    I2C_Master_Start();
    I2C_Master_Write(0b01010010);
    I2C_Master_Write(0b10001111);
    I2C_Master_Write(0);
    I2C_Master_Stop();
    __delay_ms(200);

    /* Configure the Control register */
    I2C_Master_Start();
    I2C_Master_Write(0b01010010);
    I2C_Master_Write(0b10000000);
    I2C_Master_Write(0b00001011);
    I2C_Master_Stop();
    __delay_ms(200);

    /* Read red data */
    I2C_Master_Start();
    I2C_Master_Write(0b01010010);
    I2C_Master_Write(0b10010110);
    I2C_Master_RepeatedStart();
    I2C_Master_Write(0b01010011);
    tmp[0] = I2C_Master_Read(ACK);
    tmp[1]= I2C_Master_Read(NACK);
    I2C_Master_Stop();
    __delay_ms(1000);
    rC = (tmp[0])|(tmp[1]<<8);

    /* Read green data */
    I2C_Master_Start();
    I2C_Master_Write(0b01010010);
    I2C_Master_Write(0b10011000);
    I2C_Master_RepeatedStart();
    I2C_Master_Write(0b01010011);
    tmp[0] = I2C_Master_Read(ACK);
    tmp[1]= I2C_Master_Read(NACK);
    I2C_Master_Stop();
    __delay_ms(1000);
    gC = (tmp[0])|(tmp[1]<<8);

    /* Read blue data */
    I2C_Master_Start();
    I2C_Master_Write(0b01010010);
    I2C_Master_Write(0b10011010);
    I2C_Master_RepeatedStart();
    I2C_Master_Write(0b01010011);
    tmp[0] = I2C_Master_Read(ACK);
    tmp[1]= I2C_Master_Read(NACK);
    I2C_Master_Stop();
    __delay_ms(1000);
    bC = (tmp[0])|(tmp[1]<<8);

    /* Display data on the LCD */
    __lcd_home();
    __lcd_clear();
    printf("id: %d", id);
    __delay_ms(500);


    __lcd_clear();
    printf("r:%u,b:%u", rC, bC);
    __lcd_newline();
    printf("g:%u", gC);
    __delay_ms(1000);

    id = 0;
    rC = 0;
    bC = 0;
    gC = 0;
}

Это код для RTC

void main(void) {
   /* Write outputs to LATx, read inputs from PORTx. Here, all latche (LATx)
    * are being cleared (set low) to ensure a controlled start-up state. */  
    LATA = 0x00;
    LATB = 0x00; 
    LATC = 0x00;
    LATD = 0x00;
    LATE = 0x00;

    /* After the states of LATx are known, the data direction registers, TRISx
     * are configured. 0 --> output; 1 --> input. Default is  1. */
    TRISA = 0xFF; // All inputs (this is the default, but is explicated here for learning purposes)
    TRISB = 0xFF;
    TRISC = 0b10000000; /* RC3 is SCK/SCL (SPI/I2C),
                         * RC4 is SDA (I2C),
                         * RC5 is SDA (SPI),
                         * RC6 and RC7 are UART TX and RX, respectively. */
    TRISD = 0x00; // All output mode on port D for the LCD
    TRISE = 0x00;

    /************************** A/D Converter Module **************************/
    ADCON0 = 0x00;  // Disable ADC
    ADCON1 = 0b00001111; // Set all A/D ports to digital (pg. 222)

    /* Initialize LCD. */
    initLCD();

    I2C_Master_Init(100000); //Initialize I2C Master with 100 kHz clock
    /* Set the time in the RTC.
     * 
     * To see the RTC keep time, comment this line out after programming the PIC
     * directly before with this line included. */

    RTC_setTime();

    /* Declare local variables. */
    unsigned char time[7]; // Create a byte array to hold time read from RTC
    unsigned char i; // Loop counter

    /* Main loop. */
    while(1){
        /* Reset RTC memory pointer. */
        I2C_Master_Start(); // Start condition
        I2C_Master_Write(0b11010000); // 7 bit RTC address + Write
        I2C_Master_Write(0x00); // Set memory pointer to seconds
        I2C_Master_RepeatedStart(); // Start condition
        I2C_Master_Write(0b11010001); // 7 bit RTC address + Read
        for(i = 0; i < 6; i++){
            time[i] = I2C_Master_Read(ACK); // Read with ACK to continue reading
        }
        time[6] = I2C_Master_Read(NACK); // Final Read with NACK
        I2C_Master_Stop(); // Stop condition

        /* Print received data to LCD. */
        __lcd_home();
        printf("%02x/%02x/%02x", time[6],time[5],time[4]); // Print date in YY/MM/DD
        __lcd_newline();
        printf("%02x:%02x:%02x", time[2],time[1],time[0]); // HH:MM:SS
        __delay_ms(1000);
    }
}

void RTC_setTime(void){
    /* Writes the happynewyear array to the RTC memory.*/

    I2C_Master_Start();           // Start condition
    I2C_Master_Write(0b11010000); //7 bit RTC address + Write
    I2C_Master_Write(0x00);       // Set memory pointer to seconds

    /* Write array. */
    for(char i=0; i<7; i++){
        I2C_Master_Write(happynewyear[i]);
    }

    I2C_Master_Stop();            //Stop condition
}