How do I read I2C registers?
Reading from the Slave
- Send a start sequence.
- Send 0xC0 ( I2C address of the CMPS03 with the R/W bit low (even address)
- Send 0x01 (Internal address of the bearing register)
- Send a start sequence again (repeated start)
- Send 0xC1 ( I2C address of the CMPS03 with the R/W bit high (odd address)
- Read data byte from CMPS03.
What are I2C registers?
IRD (I2C Register Description) stands for a technology which introduces an entirely new level of device access. Instead of working with addresses, offsets and byte values the user is provided with a comprehensive view of device registers which are given by the names used in the data sheets.
How do you write an I2C address?
The I2C bus specification specifies that in standard-mode I2C, the slave address is 7-bits long followed by the read/write bit. All I2C products from Total Phase, follow this standard convention. The slave address used should only be the top seven bits.
What is dummy write in I2C?
A dummy write is used in I2C systems while reading data from slave devices. Apart from the device ID of the slave unit, invariably devices require auxiliary bytes to be given before reading data from the device.
What is dummy read?
Reads 8-bit data from display RAM area specified by column address and page address. As the column address is increment by 1 automatically after each write, the microprocessor can continue to read data of multiple words. A single dummy read is required immediately after column address being setup [bold mine].
Is SMBus same as I2C?
The I²C bus and the SMBus are popular 2-wire buses that are essentially compatible with each other. Normally devices, both masters and slaves, are freely interchangeable between both buses. The buses operate at the same speed, up to 100kHz, but the I²C bus has both 400kHz and 2MHz versions.