1、struct i2c_rdwr_ioctl_data结构体 * This is the structure as used in the I2C_RDWR ioctl call */ struct i2c_rdwr_ioctl_data { struct i2c_msg __user *msgs; /* pointers to i2c_msgs */ __u32 nmsgs; /* number of i2c_msgs */ }; 1. 2. 3. 4. 5. msgs使用前必须先分配一下...
i2c->adap.class = I2C_CLASS_HWMON | I2C_CLASS_SPD; i2c->tx_setup = 50; ... ret = i2c_add_numbered_adapter(&i2c->adap); 2.需要填充i2c-algorithm结构体。i2c-algorithm结构体即指定i2c通信算法, static const struct i2c_algorithm s3c24xx_i2c_algorithm = { .master_xfer = s3c24xx_i2c_xfe...
O_RDWR);if(i2cFd<0){printf("Can't open\n");exit(1);}if(ioctl(i2cFd,I2C_SLAVE,i2c_addr)<0){printf("fail to set i2c device slave address!");close(i2cFd);return-1;}i2c_write(i2cFd,reg_addr,send_data);}
Describe the bug I'm using C to interface with some I2C devices, but I've come across a corner case that I think could cause really infrequent issues. I want to see if a community has spotted a way round it, or if I'm doing something wro...
在使用ioctl函数进行I2C通讯时,首先需要打开对应的I2C设备文件,然后通过ioctl函数来发送命令和数据。例如,要读取一个I2C设备的数据,可以先发送一个I2C_SLAVE的命令来选择设备地址,然后发送I2C_RDWR命令来读取数据。 除了读写数据之外,ioctl函数还可以用来控制I2C设备的其他功能,比如设置I2C设备的地址长度、设置时钟速率等...
我对ioctl:I2C_SLAVE感到困惑您可以通过使用read(2)和can (2)调用来执行普通的i2c事务。您不需要传递地址字节,而是在尝试访问设备之前通过ioctl I2C_SLAVE设置地址字节。 但是,我使用的是ioctl I2C_RDWR,其中再次使用i2c_msg.ad 浏览16提问于2012-04-02得票数 18 回答已采纳...
I2C 是一种串行通信协议,用于在集成电路之间进行短距离通信。它通常用于连接低带宽的外设到处理器和微控制器。 ioctl 与 I2C 在Linux 中,I2C 设备通常通过 ioctl 系统调用来控制。I2C 设备驱动程序会实现一组特定的 ioctl 命令,用户空间的应用程序可以使用这些命令来与 I2C 设备交互。 基本概念 I2C 设备文件:在 ...
/**< Graphic device */DEVICE_CLASS_I2C_BUS,/**< I2C bus device */DEVICE_CLASS_USB_DEVICE,/**< USB slave device */DEVICE_CLASS_USB_HOST,/**< USB host bus */DEVICE_CLASS_SPI_BUS,/**< SPI bus device */DEVICE_CLASS_SPI_DEVICE,/**< SPI device */DEVICE_CLASS_SDIO,/**< SDIO ...
Soft-I2C [√] [√] Pin [√] [√] PWM [√] [√] Serial [√] [√] SPI [√] [√] Timer [√] [√] msh [√] [√] LCD [√] Senser [√] 开始使用 验证Python环境 验证系统是否安装Python环境。在命令行中运行 python --version 检查Python版本(MR 脚本工具依赖Python ,若无Python环境...
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