stm3240g-eval eeprom(M24C64) issue.

[dKim.1]

Hello

I test external eeprom (M24C64) on the STM3240G-EVAL.

But it doesn't work well.

HAL_I2C_Mem_WriteBytes() and HAL_I2C_Mem_ReadBytes() return the HAL_OK.

But when I check the data[] buffer, the value is all "255".

This mean that memory is empty?

The Device address is 0xA0.

Write_Control pin is high.(M24C64)

Help me.!!

/**
 * @brief The application entry point.
 * @retval int
 */
int main(void)
{
 /* USER CODE BEGIN 1 */
 
 /* USER CODE END 1 */
 
 /* MCU Configuration--------------------------------------------------------*/
 
 /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
 HAL_Init();
 
 /* USER CODE BEGIN Init */
 
 /* USER CODE END Init */
 
 /* Configure the system clock */
 SystemClock_Config();
 
 /* USER CODE BEGIN SysInit */
 
 /* USER CODE END SysInit */
 
 /* Initialize all configured peripherals */
 MX_GPIO_Init();
 MX_I2C1_Init();
 /* USER CODE BEGIN 2 */
 
 /* USER CODE END 2 */
 
 /* Infinite loop */
 /* USER CODE BEGIN WHILE */
 uint8_t data[10] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99};
 
 
 if (HAL_I2C_Mem_Write(&hi2c1, 0xA0, 0x00, I2C_MEMADD_SIZE_8BIT, &data[0], 10, 10) == HAL_OK)
	 for (int i = 0; i < 10; i++) data[i] = 0x00;
 
 if(HAL_I2C_Mem_Read(&hi2c1, 0xA0, 0x00, I2C_MEMADD_SIZE_8BIT, &data[0], 10, 10) == HAL_OK)
	 for (int i = 0; i < 10; i++) data[i] = 0x00;
 
 
 
 while (1)
 {
 /* USER CODE END WHILE */
 
 /* USER CODE BEGIN 3 */
 }
 /* USER CODE END 3 */
}

This is my code