I2C code on nRF connect SDK

RE: I2C code on nRF connect SDK

Ashishsult — Thu, 14 Apr 2022 08:42:32 GMT

Meanwhile, I checked that the latest SDK version 1.9.1 has this issue with I2C, the version 1.8.0 and below does not have it.

RE: I2C code on nRF connect SDK

Ashishsult — Wed, 13 Apr 2022 14:54:15 GMT

I checked using the slave code with my external device, but it is also not working. I receive only nak.

Also with nrf52840 dk board.

RE: I2C code on nRF connect SDK

Ashishsult — Mon, 11 Apr 2022 11:00:15 GMT

Hi Oivind, Thanks for the link, it explains this well.

I tried to implement the same example to check, but it does not work for me on nrf52832. Can you please check it in the added zip file?

I get the error at Master side as:

I2C device 1: i2c nRF52832 addr 0x28
00>
00> I2C Master: Slave ADDR: 0x28 SCL: 31, SDA: 30, CLK(Hz): 100000
00>
00>
00> [00:00:00.336,364] <err> i2c_nrfx_twim: Error 0x0BAE0001 occurred for message 0
00> twi return code 4294967291
00>
00>
00> [00:00:01.336,608] <err> i2c_nrfx_twim: Error 0x0BAE0001 occurred for message 0
00> twi return code 4294967291
00>

And on the Saleae, it is

write to 0x28 nak
read to 0x28 nak
write to 0x28 nak
read to 0x28 nak
write to 0x28 nak
read to 0x28 nak
write to 0x28 nak
read to 0x28 nak
write to 0x28 nak
read to 0x28 nak

devzone.nordicsemi.com/.../blinky_2D00_twim_2D00_and_2D00_twis.zip

RE: I2C code on nRF connect SDK

Øivind — Fri, 08 Apr 2022 13:19:14 GMT

Hi,

Try disabling the i2c0 node in the overlay, and using the interrupt field of the overlay to set the priority.

Have you read the TWIS section of this guide? https://devzone.nordicsemi.com/guides/nrf-connect-sdk-guides/b/peripherals/posts/twi-ic2-implementation-with-nrfx-twis-driver

There appears to be some typos in the guide, so anytime it mentions TWI1, SPI1 or i2c1, just read it as TWI0, SPI0 and i2c0 instead.