本篇我们以 RK 板的 IIC 控制器为例，先讲解 Linux 下的 IIC 驱动框架。 设备树创建 i2c 设备的节点，在设备树遍历时会创建一个 i2c 的 platform 设备出来： 我们只关注其中的 match 函数，它是当一个新的设备或者一个新的驱动被添加到该总线时会被调用的匹配函数 ...

You only really need two data wires to transfer a ton of data. Standards like UART, USB2, I2C, SPI, PS/2, CAN, RS232, SWD (an interface to program MCUs), RS485, DMX, and many others, all are a ...

Serial Clock (SCL) – Clock signal is carried by this pin. Slave: The device that responds to the master are the slaves. Only a master is able to start a transfer on an I2C bus. As per I2C protocols, ...

Last time, I gave you an overview of what you get from I2C, basics like addressing, interface speeds, and a breakdown of pullups. Today, let’s continue looking into I2C capabilities and ...