engineer4ever 님의 블로그

int main(void)
{
  /* USER CODE BEGIN 1 */
	HAL_StatusTypeDef status = HAL_ERROR;

	int i = 0;

	uint16_t FM24V02_addr = 0xA0;

	uint8_t tx_buffer[65] = {};
	uint8_t rx_buffer[65] = {};

  /* USER CODE END 1 */

  /* USER CODE BEGIN 2 */
	tx_buffer[0] = 0x12;

	// Byte Write
	status = HAL_I2C_Mem_Write(&hi2c1, FM24V02_addr, 0x0001, 2, tx_buffer, 1, 1000);
	if(status != HAL_OK)
	{
		printf("I2C Byte Write error\n");
	}

	// Byte Read
	status = HAL_I2C_Mem_Read(&hi2c1, FM24V02_addr, 0x0001, 2, rx_buffer, 1, 1000);
	if(status == HAL_OK)
	{
		printf("Byte Read : %d\n", rx_buffer[0]);
	}
	else
	{
		printf("I2C Byte Read error\n");
	}

	// Page Write
	for (i = 0; i < 64; i++)
	{
		tx_buffer[i] = i;
	}
	status = HAL_I2C_Mem_Write(&hi2c1, FM24V02_addr, 0x0100, 2, tx_buffer, 64, 1000);
	if(status != HAL_OK)
	{
		printf("I2C Page Write error\n");
	}

	// Page Read
	status = HAL_I2C_Mem_Read(&hi2c1, FM24V02_addr, 0x0100, 2, rx_buffer, 64, 1000);
	if(status == HAL_OK)
	{
		for (i = 0; i < 64; i++)
		{
			printf("Page Read(%d) : %d\n", i, rx_buffer[i]);
		}
	}
	else
	{
		printf("I2C Page Read error\n");
	}

  /* USER CODE END 2 */

uint16_t FM24V02_addr = 0xA0;
uint8_t reg_addr = 0x0001;

uint8_t data_8bit = 0;
uint16_t data_16bit[65] = {};

void eeprom_i2c_write(uint16_t size)
{
	HAL_StatusTypeDef status = HAL_ERROR;
	reg_addr = 0x0001;

	for(int i = 0; i< size; i++)
    {
		data_8bit = (uint8_t)(data_16bit[i] >> 8);
		status = HAL_I2C_Mem_Write(&hi2c1, FM24V02_addr, reg_addr+(i*2), 2, &data_8bit, 1, 1000);
		HAL_Delay(10);

		data_8bit = (uint8_t)(data_16bit[i] & 0xff);
		status = HAL_I2C_Mem_Write(&hi2c1, FM24V02_addr, reg_addr+(i*2)+1, 2, &data_8bit, 1, 1000);

		if(status != HAL_OK)
		{
		    printf("EEPROM Byte Write error : %d\n", status);
		}
    }
}

void eeprom_i2c_read(uint16_t size)
{
	HAL_StatusTypeDef status = HAL_ERROR;
	reg_addr = 0x0001;

    for(int i = 0; i< size; i++)
    {
    	status = HAL_I2C_Mem_Read(&hi2c1, FM24V02_addr, reg_addr+(i*2), 2, &data_8bit , 1, 1000);
    	data_16bit[i] = data_8bit << 8;
        HAL_Delay(10);

        status = HAL_I2C_Mem_Read(&hi2c1, FM24V02_addr, reg_addr+(i*2)+1, 2, &data_8bit , 1, 1000);
        data_16bit[i] += data_8bit;

		if(status == HAL_OK)
		{
			printf("EEPROM Page Read(%d) : %d\n", i, data_16bit[i]);
		}
		else
		{
			printf("EEPROM Byte Read error\n");
		}
    }
}

HOST $ sudo apt install git libusb-1.0-0-dev pkg-config build-essential
HOST $ git clone --recurse-submodules --shallow-submodules --depth=1 https://github.com/raspberrypi/usbboot

HOST $ cd ~/usbboot/recovery
HOST $ nano boot.conf

[all]
BOOT_UART=0
WAKE_ON_GPIO=1
POWER_OFF_ON_HALT=0
 
# Try SD first (1), followed by, USB PCIe, NVMe PCIe, USB SoC XHCI then network
BOOT_ORDER=0xf25641
 
# Set to 0 to prevent bootloader updates from USB/Network boot
# For remote units EEPROM hardware write protection should be used.
ENABLE_SELF_UPDATE=1

HOST $ ./update-pieeprom.sh

HOST $ cd ~/usbboot

HOST $ sudo ./rpiboot -d recovery