How to implement I2C

RE: How to implement I2C

Amanda Hsieh — Thu, 06 Feb 2020 11:42:10 GMT

Hi,

For the BH1749 example, you should use nrf/boards/arm/nrf9160_pca20035 as the Board Directory. Please see this post.

To use I2C on nrf9160, you should use nrf9160_pca10090 as the Board Name and refer to Martin's suggestion in this post.

-Amanda H.

RE: How to implement I2C

Quasar — Wed, 05 Feb 2020 01:54:00 GMT

Thanks for responding. When I ran build for the example BH1749 I got the following error. My steps were to copy the whole BH1749 folder from the git repo, into my sensors folder (as it's own folder), then I opened it file -> open nRF, and clicked build.

Going through the other examples from other posts I tried the finished "working" example at the end of this post https://devzone.nordicsemi.com/f/nordic-q-a/45265/trouble-twi-i2c-stops-at-the-function-of-i2c_reg_read_byte-on-nrf9160-dk-why, but I got a different error.

In both cases I used the respective .conf, .overlay, and CMakeLists file provided. I have gotten many other projects to load and flash on my nRF9160. So far all of the ones in basic have worked, the I2C scanner also has ran, but it doesn't seem to get past the i2c_dev = device_get_binding(I2C_DEV); line. It so far has always printed to the terminal "I2C: Device driver not found.".

Again, thanks for the help :)
I'm slowly figuring this out so I can start hooking up I2C sensors that aren't included in the samples.

RE: How to implement I2C

Amanda Hsieh — Tue, 04 Feb 2020 09:46:05 GMT

Hi,

The only I2C sample we have at the moment is the BH1749: Ambient Light Sensor IC (https://github.com/NordicPlayground/fw-nrfconnect-nrf/tree/master/samples/sensor/bh1749) used on the Thingy:91.

This post might help you.

-Amada