/* Note that I2C_SMBUS_READ and I2C_SMBUS_WRITE are 0 and 1, so the check is valid if size==I2C_SMBUS_QUICK too. */ if ((data_arg.read_write != I2C_SMBUS_READ) && (data_arg.read_write != I2C_SMBUS_WRITE)) { dev_dbg(&client->adapter->dev, "read_write out of range ...
data = i2c_smbus_read_word_data(fd, addr); printf("data: %c, %d, 0x%2x\n", data, data, data); } else if ((strcmp(argv[3], "w") == 0) && (argc == 6)) { addr = strtoul(argv[4], NULL, 0); data = strtoul(argv[5], NULL, 0); i2c_smbus_write_byte_data(fd, ...
s32 i2c_smbus_read_word_data(const struct i2c_client *client,u8 command); //S Addr Wr [A] Comm [A] S Addr Rd [A] [DataLow] A [DataHigh] NA P s32 i2c_smbus_write_word_data(const struct i2c_client *client,u8 command, u16 value); //S Addr Wr [A] Comm [A] DataLow [A]...
i2c_smbus_read_byte_data(); i2c_smbus_read_word_data(); i2c_smbus_read_block_data(); 常用的写操作接口函数: i2c_smbus_write_byte_data(); i2c_smbus_write_word_data(); i2c_smbus_write_block_data(); s32i2c_smbus_read_byte_data(const struct i2c_client *client, u8 command); 函数...
函数返回读取的字节数据。 2. i2c_smbus_write_byte_data() 该函数用于向 I2C 设备写入一个字节的数据。它的参数包括 I2C 设备的地址、寄存器地址和写入的数据。函数返回 0 表示成功,否则 表示失败。 3. i2c_smbus_read_word_data() 该函数用于从 I2C 设备中读取两个字节的数据。它的参数包括 I2C 设备的...
i2cbus表示要扫描的I2C总线的编号或名称。这个数字应该与i2cdetect -l列出 的总线之一相对应。 chip-address要操作的外设从地址。 data-address被查看外设的寄存器地址。 mode显示数据的方式: b (read byte data, default) w (read word data) c (write byte/read byte) 下面是完成读取0总线上从地址为0x...
I tried to raspberry this, and i went to ArduCAM/examples/RaspberryPi and typed make g++ -std=c++0x -I./ -I../../../ArduCAM -c arducam_arch_raspberrypi.c arducam_arch_raspberrypi.c: In function ‘uint8_t arducam_i2c_word_write(uint16_t, u...
#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000 #define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000 #define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000 #define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000 #define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000 ...
i2cdetect:用于扫描i2c总线上的设备 Usage:i2cdetect [ - y] [ - a] [ - q | - r]I2CBUS [ FIRST LAST 2023-07-27 16:16:27 i2ctools命令使用示例详解 (word data )i(I2Cblock data ) s (SMBus block data ) Append p for SMBus PEC f:强制访问 y:指令执行自动yes,否则会提示 ...
注意,不要直接使用read(),write()操作函数,直接使用i2c_smbus_write_word_data,i2c_smbus_read_word_data。官方文档给了说明,如下 驱动程序编译进内核才有效,I2c-dev.c依赖于那些配置项,查看makefile makemenuconfig,搜索CONFIG_I2C_CHARDEV 重启内核,编译新内核,之后下载到开发板 ...