MSP430FR2673: MSP430FR2673 External EEPROM interface with I2C

Part Number: MSP430FR2673

Hi,

 I am work on MSP430FR2673, I want to strore data and read data from External EEPROM 24LC64 using I2C. I write a code but it's not working. I don't kow why? Please give replay. 

Thank you

Athulya

#include <msp430.h>

#define EEPROM_ADDRESS 0xA0    // EEPROM I2C address
#define EEPROM_SIZE 256        // EEPROM size in bytes

void initI2C() {
    WDTCTL = WDTPW | WDTHOLD;

    // Configure GPIO
    P1OUT &= ~BIT0;                         // Clear P1.0 output latch
    P1DIR |= BIT0;                          // For LED
    P3SEL0 |= BIT2 | BIT6;                  // I2C pins

    // Disable the GPIO power-on default high-impedance mode to activate
    // previously configured port settings
    PM5CTL0 &= ~LOCKLPM5;

    // Configure USCI_B0 for I2C mode
    UCB1CTLW0 |= UCSWRST;                   // Software reset enabled
    UCB1CTLW0 |= UCMODE_3 | UCMST | UCSYNC; // I2C mode, Master mode, sync
    UCB1CTLW1 |= UCASTP_2;                  // Automatic stop generated
                                            // after UCB0TBCNT is reached
    UCB1BRW = 0x78;                       // baudrate = SMCLK / 8
    UCB1TBCNT = 0x0002;                     // number of bytes to be received
    UCB1I2CSA = 0x00A0;                     // Slave address
    UCB1CTL1 &= ~UCSWRST;
    UCB1IE |= UCRXIE | UCNACKIE | UCBCNTIE;
}

void writeByteToEEPROM(unsigned char data, unsigned int address) {
    while (UCB1STATW & UCBBUSY);    // Wait for I2C bus to be idle

    // Set EEPROM write address
    UCB1I2CSA = EEPROM_ADDRESS;

    // Set write mode
    UCB1CTLW0 |= UCTR;

    // Set memory address to write to
    UCB1CTLW0 |= UCTXSTT;           // Send start condition
    while (!(UCB1IFG & UCTXIFG1));  // Wait for start condition to be sent

    // Send memory address (MSB then LSB)
    UCB1TXBUF = (address >> 8) & 0xFF;  // MSB
    while (!(UCB1IFG & UCTXIFG1));     // Wait for address to be sent
    UCB1TXBUF = address & 0xFF;         // LSB
    while (!(UCB1IFG & UCTXIFG1));     // Wait for address to be sent

    // Send data byte
    UCB1TXBUF = data;
    while (!(UCB1IFG & UCTXIFG1));     // Wait for data to be sent

    // Send stop condition
    UCB1CTLW0 |= UCTXSTP;
}

unsigned char readByteFromEEPROM(unsigned int address) {
    unsigned char data;

    while (UCB1STATW & UCBBUSY);    // Wait for I2C bus to be idle

    // Set EEPROM write address
    UCB1I2CSA = EEPROM_ADDRESS;

    // Set write mode
    UCB1CTLW0 |= UCTR;

    // Set memory address to read from
    UCB1CTLW0 |= UCTXSTT;           // Send start condition
    while (!(UCB1IFG & UCTXIFG1));  // Wait for start condition to be sent

    // Send memory address (MSB then LSB)
    UCB1TXBUF = (address >> 8) & 0xFF;  // MSB
    while (!(UCB1IFG & UCTXIFG1));     // Wait for address to be sent
    UCB1TXBUF = address & 0xFF;         // LSB
    while (!(UCB1IFG & UCTXIFG1));     // Wait for address to be sent

    // Set read mode
    UCB1CTLW0 &= ~UCTR;

    // Send repeated start condition
    UCB1CTLW0 |= UCTXSTT;
    while (UCB1CTLW0 & UCTXSTT);    // Wait for repeated start to be sent

    // Receive data byte
    data = UCB1RXBUF;

    // Send stop condition
    UCB1CTLW0 |= UCTXSTP;

    return data;
}

int main(void) {
    WDTCTL = WDTPW | WDTHOLD;    // Stop watchdog timer

    initI2C();

    // Example usage: Write data to EEPROM
    unsigned int address = 0;
    unsigned char data_to_write = 0x55;
    writeByteToEEPROM(data_to_write, address);

    // Example usage: Read data from EEPROM
    unsigned char data_read = readByteFromEEPROM(address);

    while (1) {
        // Do something with the data
    }

    return 0;
}