Not getting where I2C pins are on nrf52 DK (using Arduino IDE)

[Dhillon]

Hi

I have done setup using guide (https://github.com/sandeepmistry/arduino-nRF5) by sandeepmistery.

I am able to blink led of nrf52DK using Arduino example code.

I am also able to use BLEPeripheral examples and able to advertise and other stuff. ( with Arduino example code)

Now, I am trying to connect LSM9DS1 (Sparkfun breakout) with nrf52 DK using I2C example provided by spark fun and its not working.

As for led program which was working fine, we are playing with led 6 to led 9 on Arduino code and led's connected to P0.17 to P0.20 on nrf 52 dk corresponds to them. 

Now I jus want to know when I'm using I2c code (Arduino example code of lsm9ds1 by spark fun), what will be the possible SCL and SDA pins on nrf52DK ( because P0.26 and P0.27 are not working as SCL and SDA).

[Martin Lesund]

Hi Dhillon,

 I do not know how to use the "Arduino Example code", but it is possible to choose which GPIOs the SCL and SDA signals should be from. (This is done in the application.)

P0.27 and P0.26 should not be a problem to use.

 

 I recommend you to check out the TWI sensor example in our SDK, it works "out-of-the-box" and uses pins P0.27 and P0.26 as default. (you can change the definition of these in the "pca10040.h" file)

I also recommend you to check out "SEGGER Embedded studio" (we provide free licence). (Getting Started Guide)

[Dhillon]

Hi Martin

Thanks for response.

I found that working, the reason was extra pull-up on p.26 and p.27.

[Martin Lesund]

Hi Dhillon,

I am glad to hear that you got it to work and shared tha solution.

Have a great day !