How to implement I2C on nRF9160?

RE: How to implement I2C on nRF9160?

MichaelXlivnenko — Tue, 17 Aug 2021 15:57:11 GMT

The link is invalid, could you please share a valid version?
Thanks)

RE: How to implement I2C on nRF9160?

talha — Mon, 28 Oct 2019 12:34:27 GMT

The compatible line did the trick. it works. Thank you.

RE: How to implement I2C on nRF9160?

Sigurd — Mon, 28 Oct 2019 12:27:23 GMT

No problem.

For reference, here is the project I used to test it:

devzone.nordicsemi.com/.../i2c.zip

I built it with "west build -b nrf9160_pca10090ns -d my_build_folder"

RE: How to implement I2C on nRF9160?

talha — Mon, 28 Oct 2019 12:21:12 GMT

I tried doing it before the status, i will try it like this.
Thank you. :)

RE: How to implement I2C on nRF9160?

Sigurd — Mon, 28 Oct 2019 12:09:21 GMT

Hi talha,

To fix this issue, please add compatible = "nordic,nrf-twim"; to the overlay. I.e., so it looks like this:

nrf9160_pca10090ns.overlay

&i2c3 {
	status = "okay";
	compatible = "nordic,nrf-twim";
	sda-pin = < 12 >;
	scl-pin = < 11 >;
    clock-frequency = <I2C_BITRATE_STANDARD>;
};

RE: How to implement I2C on nRF9160?

talha — Mon, 28 Oct 2019 10:03:55 GMT

Hi Sigurd : i am trying to run the i2c sensor example from the master branch of your repo.

I am having the following error with latest version of the tools. (ran a west update)
Can you please help with this ?
Thank you.
Seems like it cannot recognize the i2c3 some how ?

2> Compiling ‘i2c_nrfx_twim.c’
2> In file included from C:/Nord/ncs/zephyr/include/toolchain.h:39:0,
2>                  from C:/Nord/ncs/zephyr/include/kernel_includes.h:19,
2>                  from C:/Nord/ncs/zephyr/include/kernel.h:17,
2>                  from C:/Nord/ncs/zephyr/include/device.h:11,
2>                  from C:/Nord/ncs/zephyr/include/drivers/i2c.h:23,
2>                  from C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:8:
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:221:4: error: 'DT_NORDIC_NRF_TWIM_I2C_3_CLOCK_FREQUENCY' undeclared here (not in a function); did you mean 'DT_NORDIC_NRF_TWIM_I2C_2_CLOCK_FREQUENCY'?
2> C:/Nord/ncs/zephyr/include/toolchain/gcc.h:63:52: note: in definition of macro 'BUILD_ASSERT_MSG'
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:220:3: note: in expansion of macro 'I2C_NRFX_TWIM_FREQUENCY'
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:269:1: note: in expansion of macro 'I2C_NRFX_TWIM_DEVICE'
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:213:3: error: expression in static assertion is not an integer
2> C:/Nord/ncs/zephyr/include/toolchain/gcc.h:63:52: note: in definition of macro 'BUILD_ASSERT_MSG'
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:220:3: note: in expansion of macro 'I2C_NRFX_TWIM_FREQUENCY'
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:269:1: note: in expansion of macro 'I2C_NRFX_TWIM_DEVICE'
2> In file included from C:/Nord/ncs/zephyr/include/arch/arm/irq.h:18:0,
2>                  from C:/Nord/ncs/zephyr/include/arch/arm/arch.h:26,
2>                  from C:/Nord/ncs/zephyr/include/arch/cpu.h:17,
2>                  from C:/Nord/ncs/zephyr/include/kernel_includes.h:34,
2>                  from C:/Nord/ncs/zephyr/include/kernel.h:17,
2>                  from C:/Nord/ncs/zephyr/include/device.h:11,
2>                  from C:/Nord/ncs/zephyr/include/drivers/i2c.h:23,
2>                  from C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:8:
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:226:15: error: 'DT_NORDIC_NRF_TWIM_I2C_3_IRQ_0' undeclared (first use in this function); did you mean 'DT_NORDIC_NRF_TWIM_I2C_2_IRQ_0'?
2> C:/Nord/ncs/zephyr/include/sw_isr_table.h:70:5: note: in definition of macro 'Z_ISR_DECLARE'
2> C:/Nord/ncs/zephyr/include/irq.h:51:2: note: in expansion of macro 'Z_ARCH_IRQ_CONNECT'
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:226:3: note: in expansion of macro 'IRQ_CONNECT'
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:269:1: note: in expansion of macro 'I2C_NRFX_TWIM_DEVICE'
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:226:15: note: each undeclared identifier is reported only once for each function it appears in
2> C:/Nord/ncs/zephyr/include/sw_isr_table.h:70:5: note: in definition of macro 'Z_ISR_DECLARE'
2> C:/Nord/ncs/zephyr/include/irq.h:51:2: note: in expansion of macro 'Z_ARCH_IRQ_CONNECT'
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:226:3: note: in expansion of macro 'IRQ_CONNECT'
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:269:1: note: in expansion of macro 'I2C_NRFX_TWIM_DEVICE'
2> In file included from C:/Nord/ncs/zephyr/include/arch/arm/arch.h:26:0,
2>                  from C:/Nord/ncs/zephyr/include/arch/cpu.h:17,
2>                  from C:/Nord/ncs/zephyr/include/kernel_includes.h:34,
2>                  from C:/Nord/ncs/zephyr/include/kernel.h:17,
2>                  from C:/Nord/ncs/zephyr/include/device.h:11,
2>                  from C:/Nord/ncs/zephyr/include/drivers/i2c.h:23,
2>                  from C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:8:
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:227:8: error: 'DT_NORDIC_NRF_TWIM_I2C_3_IRQ_0_PRIORITY' undeclared (first use in this function); did you mean 'DT_NORDIC_NRF_TWIM_I2C_2_IRQ_0_PRIORITY'?
2> C:/Nord/ncs/zephyr/include/arch/arm/irq.h:82:32: note: in definition of macro 'Z_ARCH_IRQ_CONNECT'
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:226:3: note: in expansion of macro 'IRQ_CONNECT'
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:269:1: note: in expansion of macro 'I2C_NRFX_TWIM_DEVICE'
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:240:17: error: 'DT_NORDIC_NRF_TWIM_I2C_3_SCL_PIN' undeclared here (not in a function); did you mean 'DT_NORDIC_NRF_TWIM_I2C_2_SCL_PIN'?
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:269:1: note: in expansion of macro 'I2C_NRFX_TWIM_DEVICE'
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:241:17: error: 'DT_NORDIC_NRF_TWIM_I2C_3_SDA_PIN' undeclared here (not in a function); did you mean 'DT_NORDIC_NRF_TWIM_I2C_2_SDA_PIN'?
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:269:1: note: in expansion of macro 'I2C_NRFX_TWIM_DEVICE'
2> In file included from C:/Nord/ncs/zephyr/include/drivers/i2c.h:23:0,
2>                  from C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:8:
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:247:9: error: 'DT_NORDIC_NRF_TWIM_I2C_3_LABEL' undeclared here (not in a function); did you mean 'DT_NORDIC_NRF_TWIM_I2C_2_LABEL'?
2> C:/Nord/ncs/zephyr/include/device.h:107:11: note: in definition of macro 'DEVICE_AND_API_INIT'
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:246:2: note: in expansion of macro 'DEVICE_DEFINE'
2> C:/Nord/ncs/zephyr/drivers/i2c/i2c_nrfx_twim.c:269:1: note: in expansion of macro 'I2C_NRFX_TWIM_DEVICE'
Build failed

RE: How to implement I2C on nRF9160?

Yusuke — Thu, 21 Mar 2019 15:43:41 GMT

Thank you so much!

I copied your project and it works.

I used to copy asset_tracker project and overwrite code on main.c because I don't know how to make a project from scratch. This caused the problem. I copy secure_boot project and copy your code then I2c works.

RE: How to implement I2C on nRF9160?

Sigurd — Thu, 21 Mar 2019 09:11:44 GMT

Hi,

This sample runs fine for me on the nRF9160, i.e. the programs starts. Note that I have not tested it by connecting a I2C slave to it.

RE: How to implement I2C on nRF9160?

Yusuke — Tue, 19 Mar 2019 13:44:34 GMT

Hi, Sigurd. Thank you very much for your advice.

>Are you on the master branch, or are you on the 0.3.0 tag ?

Yes. I followed the instruction of Getting Started Assistant and run this command.
cd <sourcecode_root>/ncs/nrf ; git checkout tags/v0.3.0

>What commands do you use to build the project?
I click "Build" > "Build and run" on SEGGER Embedded Studio. I don't know other ways to build.

>Also note that the peripheral(I2C, or TWIM in this case) need to be configured as non-secure in secure_boot sample. On the master branch, at least NRF_TWIM2 is configured to non-secure by default.
So, when I start to develop a new firmware, what should I do? Should I copy secure_boot sample and modify it? I usually copy asset_tracker sample and modify it.
I really appreciate it if you show me any example code using I2C with nRF9160.

RE: How to implement I2C on nRF9160?

Sigurd — Tue, 19 Mar 2019 09:03:00 GMT

Hi,

Are you on the master branch, or are you on the 0.3.0 tag ?

What commands do you use to build the project? If you are on master branch, you can use the commands shown in this post.

Also note that the peripheral(I2C, or TWIM in this case) need to be configured as non-secure in secure_boot sample. On the master branch, at least NRF_TWIM2 is configured to non-secure by default.