#include?<linux/module.h>
#include?<linux/i2c.h>

/*?定義?I2C?設(shè)備名稱?*/
#define?DEVICE_NAME?"i2c_device"

/*?定義?I2C?設(shè)備地址?*/
#define?DEVICE_ADDR?0x20

/*?定義?I2C?設(shè)備結(jié)構(gòu)體?*/
struct?i2c_dev?{
????struct?i2c_client?*client;
};

static?int?i2c_probe(struct?i2c_client?*client,?const?struct?i2c_device_id?*id)
{
????struct?i2c_dev?*i2c_dev;

????/*?為?I2C?設(shè)備分配內(nèi)存空間?*/
????i2c_dev?=?devm_kzalloc(&client->dev,?sizeof(*i2c_dev),?GFP_KERNEL);
????if?(!i2c_dev)
????????return?-ENOMEM;

????i2c_dev->client?=?client;
????i2c_set_clientdata(client,?i2c_dev);

????/*?在這里執(zhí)行?I2C?設(shè)備初始化操作?*/

????return?0;
}

static?int?i2c_remove(struct?i2c_client?*client)
{
????struct?i2c_dev?*i2c_dev?=?i2c_get_clientdata(client);

????/*?在這里執(zhí)行?I2C?設(shè)備資源釋放操作?*/

????return?0;
}

static?const?struct?i2c_device_id?i2c_id[]?=?{
????{?DEVICE_NAME,?DEVICE_ADDR?},
????{?}
};
MODULE_DEVICE_TABLE(i2c,?i2c_id);

static?struct?i2c_driver?i2c_driver?=?{
????.driver?=?{
????????.name?=?DEVICE_NAME,
????????.owner?=?THIS_MODULE,
????},
????.probe?=?i2c_probe,
????.remove?=?i2c_remove,
????.id_table?=?i2c_id,
};

module_i2c_driver(i2c_driver);

MODULE_AUTHOR("your?name");
MODULE_DESCRIPTION("I2C?driver?for?Linux");
MODULE_LICENSE("GPL");

#!/bin/bash

#?設(shè)置網(wǎng)卡名稱
IFACE="eth0"

#?循環(huán)測試網(wǎng)卡是否存在
while?true
do
????if?ifconfig?$IFACE
????then
????????echo?"網(wǎng)卡?$IFACE?已存在"
????else
????????echo?"網(wǎng)卡?$IFACE?不存在"
????fi

????#?每隔一段時間測試一次
????sleep?1
done