linux 读写i2c设备,使用Linux通过I2C读写EEPROM

我尝试通过I2C读取和写入带有Raspberry Pi B的Atmel 24C256 EEPROM,但是我无法正常工作.

这是我到目前为止的代码：

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#define DEVICE_PATH "/dev/i2c-1"

#define PAGE_SIZE 64

#define DEVICE_ADDR 0x50 // 0b1010xxxx

int file_desc;

char buffer[PAGE_SIZE + 2]; // 64 bytes + 2 for the address

void teardownI2C()

{

int result = close(file_desc);

}

void setupI2C()

{

file_desc = open(DEVICE_PATH, O_RDWR);

if(file_desc < 0)

{

printf("%s\n", strerror(errno));

exit(1);

}

if(ioctl(file_desc, I2C_SLAVE, DEVICE_ADDR) < 0)

{

printf("%s\n",