linux应用层读写at24,嵌入式中linux系统对eeprom芯片at24c02的操作实例（包括驱动层和应用层代码）...

#include #define AT24_SIZE_BYTELEN 5

#define AT24_SIZE_FLAGS 8

/* create non-zero magic value for given eeprom parameters */

#define AT24_DEVICE_MAGIC(_len, _flags) \

((1 << AT24_SIZE_FLAGS | (_flags)) \

<< AT24_SIZE_BYTELEN | ilog2(_len))

static const struct i2c_device_id at24_ids[] = {

{ "24c00", AT24_DEVICE_MAGIC(128 / 8, AT24_FLAG_TAKE8ADDR) },

{ "24c01", AT24_DEVICE_MAGIC(1024 / 8, 0) },

{ "24c02", AT24_DEVICE_MAGIC(2048 / 8, 0) },

{ "spd", AT24_DEVICE_MAGIC(2048 / 8,

AT24_FLAG_READONLY | AT24_FLAG_IRUGO) },

{ "24c04", AT24_DEVICE_MAGIC(4096 / 8, 0) },

{ "at24c08", AT24_DEVICE_MAGIC(8192 / 8, 0) },

{ "24c16", AT24_DEVICE_MAGIC(16384 / 8, 0) },

{ "24c32", AT24_DEVICE_MAGIC(32768 / 8, AT24_FLAG_ADDR16) },

{ "24c64