I2C example with NRF51822

[ABDELLI-W]

Are there any I2C examples for the nRF51822 ( write/ read functions) ? If not, can anyone suggest a good starting point for I2C? I am using Eclipse kepler for development. Thank you for all suggests.

[Steven Wik]

Hi,

There is an example project using I2C on the nRF51822 - they refer to it as a "Two Wire Interface" (TWI) in the PS and RM, please see Section 27 of the RM 2.1 for a complete description.

The example program of an I2C master can be found in the stack example path below:

\Nordic Semiconductor\nRF51 SDK_v5.1.0.36092\Nordic\nrf51822\Board\nrf6310\twi_sw_master_example

Cheers, Steve

[ABDELLI-W]

Hi, Thank you for you Answering. I've seen the example of Nordic, but for me it does not explain very well for me how it implemnts the read/write frame.

[Mario]

Hello,

I am trying to find the I2C example and I can't. It doesn't appear here:

developer.nordicsemi.com/.../a00038.html

And it doesn't either in my PC folder. It is possible that it was available in SDK v5.1.0 version but it's not anymore?

Thank you.

[Steven Wik]

Hi Mario,

Have you tried this link here?

I'm not sure why you can't find the example in your SDK's file path - it looks like the latest SDK still has the example under the nrf6310 folder. Are you looking in the correct folder?

-Steve

[Mario]

Hi Steve, I saw that link. It appears under "drivers". I do have the "twi_master.h", "twi_hw_master.c" and "twi_sw_master.c" within drivers folder, but in examples folder I can't find anything related with TWI or I2C. I don't know what is wrong but I'm getting a headache with this.

If I create a project and write #include "twi_master.h" it says it can't find that file. It doesn't happen with "simple_uart.h" for example and I don't understand why because both of them are within the same folder "drivers" (where the uvision is supossed to find header files)

The path of my examples folder is this

C:\Keil_v5\ARM\Pack\NordicSemiconductor\nRF_Examples\7.2.0\peripheral

[ALi]

copy these files (.c,.h) to near Project main.c file and after that import to your project in Keil.