/* a ioctl like command that can be used to perform specific functions * with the device. */ int (*command)(struct i2c_client *client, unsigned int cmd, void *arg); struct device_driver driver; const struct i2c_device_id *id_table; /* Device detection callback for automatic device cr...
*/ int (*command)(struct i2c_client *client, unsigned int cmd, void *arg); struct device_driver driver; const struct i2c_device_id *id_table; /* Device detection callback for automatic device creation */ int (*detect)(struct i2c_client *, struct i2c_board_info *); const unsigned ...
3.设备树修改完成以后使用“make dtbs”重新编译一下,然后使用新的设备树启动Linux内核。/sys/bus/i2c/devices 目录下存放着所有 I2C 设备,如果设备树修改正确的话,会在/sys/bus/i2c/devices目录下看到一个名为“0-001e”的子目录。说明修改成功 AP3216C驱动编写 #include <linux/types.h> #include <linux/kern...
*/ int (*command)(struct i2c_client *client, unsigned int cmd, void *arg); struct device_driver driver; const struct i2c_device_id *id_table; /* Device detection callback for automatic device creation */ int (*detect)(struct i2c_client *, struct i2c_board_info *); const unsigned sho...
Linux I2C驱动分析报告 一 目的 掌握Linux系统下的I2C驱动程序的编写方法,能参照现成的I2C设备驱动程序编写某特定I2C设备的驱动程序。二 计划安排 分析调试计划如图所示: 三I2C驱动程序学习分析 3.1 I2C简介 I2C总线 I2C (Inter-Integrated Circuit)总线是一种由PHILIPS公司开发的两线式串行总线,用于连接微控制...
u8 command, int size, union i2c_smbus_data *data); /* To determine what the adapter supports */ u32 (*functionality) (struct i2c_adapter *); #if IS_ENABLED(CONFIG_I2C_SLAVE) int (*reg_slave)(struct i2c_client *client); int (*unreg_slave)(struct i2c_client *client); ...
int (*command)(struct i2c_client *client, unsigned int cmd, void *arg); struct device_driver driver; //设备驱动结构体 const struct i2c_device_id *id_table; //设备名称,用来匹配设备与驱动 int (*detect)(struct i2c_client *client, struct i2c_board_info *info); ...
*/int(*command)(structi2c_client *client,unsignedintcmd,void*arg);// 类似于ioctl 的命令控制函数structdevice_driverdriver;conststructi2c_device_id*id_table;// 这个i2c驱动支持的设备链表/* Device detection callback for automatic device creation */int(*detect)(structi2c_client *,structi2c_board_...
int(*smbus_xfer)(structi2c_adapter*adap,u16addr,unsignedshortflags,charread_write,u8command,intsize,unioni2c_smbus_data*data);// 向给定的I2C适配器发出smbus事务。如果这不存在,那么总线层将尝试将SMBus调用转换为I2C传输。/* To determine what the adapter supports */u32(*functionality)(structi2c...
Linux应用开发基础知识——I2C应用编程(十三) 一、无需编写驱动程序即可访问 I2C 设备 APP 访问硬件肯定是需要驱动程序的,对于I2C设备,内核提供了驱动程序drivers/i2c/i2c-dev.c,通过它可以直接使用下面的 I2C 控制器驱动程序来访问 I2C 设备。 i2c-tools 是一套好用的工具,也是一套示例代码。