nrf52832 TWI Read and Write

[Sushi_27]

Hi there,

I'm developing with the nRF52832 right now.

I want to communicate nrf52832 (as master) with MP2723 to read and write  data  with TWI.

[Einarh]

Here's the functional description of the hardware:

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52832.ps.v1.1%2Ftwi.html

You can use either of these two drivers:

http://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/hardware/peripherals/i2c.html

http://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrfx/drivers/twi/driver.html

[Sushi_27]

okay.

I've tried the twi  example of sdk but I'am  facing issue to read the register data.

[Einarh]

Ok, that's what you want to do, but what is your issue? What isn't working as expected?

[Einarh]

If you are unfamiliar with I2C or NCS and not sure how to get started, I would recommend having a look at the Nordic DevAcademy:

https://academy.nordicsemi.com/lessons/lesson-6-serial-com-i2c/

[Sushi_27]

Thanks for the references. 

I'm able to communicate with the slave.

[Sushi_27]

Sorry for late response. 

The problem is that slave register's  value is changed  after writing to it. I don't know that I should write it again or what should be done to get back to the default value. 

( slave register with address 0x00 had default value 0x48. But now its showing 0x00 )

[Einarh]

Sushi_27 said:

value is changed  after writing to it.

I don't understand, is this not expected?