Initially, I used a eBus SDK which supports 8 bits registers for the I2C. This SDK does not support 16 bits register address for I2C. Is there any alternative to this sdk that support 16 bit register address for the I2C?
Best wishes and thank you in advance
Answer
There are a few concepts to clear up based on the other comments. All I2C devices ONLY support 7-bit (8 with the read/write) and 10-bit Slave Addressing. This, however, was not the concept asked about in the topic.
I2C, per the protocol specifications, reads/writes in sets of 8-bits followed by an Acknowledgement (ACK/NACK) from the device receiving the data. How the device interprets the bits read/written to it can vary greatly from device to device.
From my personal experience, I have found that often a larger register address -- such as 0x1234 -- simply means that you need to read/write from registers 0x12 and 0x34. Both registers will hold 8-bits of information which together form the actual 16-bit word referenced by the hexadecimal 0x1234.
As I mentioned though, this can vary per device. You will likely need to read through the Data Sheets/Manuals for your specific I2C device for more information on its register addressing to ensure you read/write from the right registers and assemble the individual 8-bits into the correct order to extract the corresponding 16-bit word.