Arduino I2C read specific Register Address

Projects Programming
1

Is there any way to read from a specific register address using I2C? I have an IC that has over 16 register addresses and I want to read only 2 of them (the third 0x02 and twelve 0X12).

Thank you.

2

Read the datasheet of that device.
In most cases a device has an internal register pointer. So that is written first and after that a few bytes are read.

3

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What is the best way to read data from registers? Inside the loop() or where? I am asking this because I am trying to build a small car fm transmitter and although I managed to transmit there is a small noise (pop) every time I read the registers inside the loop(); Based on the readings if something is not correct I make some writtings in the registers.

4

You can read and write the registers of the device in the loop.
With audio devices that can result in a 'pop' or 'click' sound. As far as I know that is always a hardware problem. It is mostly caused by the way the circuit is designed, but perhaps it can be caused in the chip itself.

5

you should make separate functions to read the register.
Give the functions a descriptive names that reflect the function of the register.
Then you can call it anywhere (after the device is properly initialized of course)

int read_antimatterflux(int deviceid)
{
  // code to read register 2 from named deviceid
}

int get_gravity_status(int deviceid)
{
  // code to read register 12
}