Linux I2C reads and writes to 16-bit register addresses __linux
Source: Internet
Author: User
The premise is that the driver of the I2C controller must have been running normally, the standard I2C tool can only read and write to 8-bit address, but the EEPROM of this 16-bit address will be powerless
So this kind of 16-bit address for read and write support, in the embedded domain is still very common
The main use of standard Linux I2C interface, struct i2c_msg; I2C message data structure
First, the I2C sequence diagram (from the network)
Read, need two messages: first, confirm register address, length is 2, because register address is 16bit, second, is to send read and write instruction, length is 2, read is 16bit length
Write, a message can be, because do not need to restart, you will be more than 8bit register address, as the first byte of data
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