I2C function sdk v1.6.0-rc2

RE: I2C function sdk v1.6.0-rc2

embeddedER — Wed, 22 Dec 2021 18:43:41 GMT

Thanks, Swathy.

I was able to make I2C work with my sensor. My sensor works at 50kbps, so I had to change the register in SDK.

I am using nRF Connect SDK 1.8.0 and I changed the register (TWIM_FREQUENCY_FREQUENCY_K100) value in nrf52_bitfields.h and it worked for me.

But this change is outside my application i.e. if I migrate to new SDK later on then I'll need to do change in that SDK as well. So, I was just wondering if there is a way to change this register from my application itself?

Thanks.

RE: I2C function sdk v1.6.0-rc2

SwRa — Wed, 22 Dec 2021 16:07:31 GMT

Hi,

This is the updated link to the sample git code that Heidi shared. Kindly refer it.

Kind Regards,

Swathy

RE: I2C function sdk v1.6.0-rc2

embeddedER — Mon, 20 Dec 2021 19:15:18 GMT

Hi There,

I am also trying to do similar thing by connecting nRFDK with my custom sensor which is using I2C (bit-bang).

If you folks have this working can anyone share the sample code? I don't find I2C sample in even the latest 1.8.0 nRF Connect SDK.

Also, Heidi, the link which you shared for sample git code is not reachable.

Any help would be great.

Thanks.

RE: I2C function sdk v1.6.0-rc2

Fb62 — Mon, 28 Jun 2021 08:42:36 GMT

Hello,

I have solved

I add in the prj.conf

CONFIG_I2C=y

and now get the device.

Best Regards

RE: I2C function sdk v1.6.0-rc2

Fb62 — Fri, 25 Jun 2021 15:24:15 GMT

Hi,

when i call:

i2c_dev = device_get_binding("I2C_1");

I get error bindig failed.

Where are defined the device NAME?

Thanks

Regards

Fausto

RE: I2C function sdk v1.6.0-rc2

Fb62 — Fri, 25 Jun 2021 14:32:19 GMT

Hi Heidi,

I try whit using the sample.

Best regards

Fausto

RE: I2C function sdk v1.6.0-rc2

Heidi — Fri, 25 Jun 2021 14:23:07 GMT

Hi!

Unfortunately, we don't have any official basic I2C samples available in NCS.

But a colleague of mine has this I2C sample on his private GitHub, a simple I2C scanner for the nRF5340 DK or the nRF9160 DK. It should be easy enough to port to the nRF52 DK you are using.

I recommend starting with taking a look at the I2C documentation available in Zephyr (see Peripherals I2C). And also take a look at how the Devicetree works (see Devicetree HOWTOs).

The functions used to configure the I2C driver.

i2c_dev = device_get_binding("I2C_1");
i2c_configure(i2c_dev, dev_config);

And then i2c_transfer() to perform the data transfer.

Best regards,

Heidi