Enable SPIM0 and TWIM1 Drivers in KConfig NCS

[adnankhalid]

Hello,

I am trying to enable the SPIM0 and TWIM1 drivers for my current project. Under the VS Code GUI for KConfig, I see the options, but they are grayed out and cannot be selected. Can someone guide me as to how to enable them? Maybe I have something enabled/disabled that is causing this. Manually adding them in the KConfig only produces compile errors. I am using nRF Connect SDK v2.1.2 and have the nRF52 DK (nRF52832) board for eval purposes.

Thanks,

Adnan

[Sigurd Hellesvik]

Hi,

Are you using other peripherals with the same peripheral ID?

Also, check the status of the peripherals in the devicetree.

Regards,
Sigurd Hellesvik

[adnankhalid]

Hello,

I am trying to use a peripheral, camera module, that's why I need access to the drivers. No other peripheral.

I am modifying the Peripheral_UART example for this. I did add a custom overlay file but that has only GPIOs and ADC mappings. I have not touched any of the IDs.

Thanks,

Adnan

[Sigurd Hellesvik]

Hi Adnan,

Ah, then we know that the devicetree is correct.

The errors below is that Kconfigs are not set.
You can check their dependencies of Kconfig options in VS Code using the Kconfig feature:

Then check the value of the dependencies:

Does this show you what you are missing with your options?

Regards,
Sigurd Hellesvik

[adnankhalid]

Hi Siguard,

So when I look into the dependencies of the SPIM0 and TWIM1 in the KCONGIH GUI. They are both grayed out, so cannot be selected, and the only thing it says for dependencies is =n.

I need to, some how, enable the NRFX SPIM0 and NRFX TWIM1 drivers to move forward with my project.

Thanks,

Adnan

[Sigurd Hellesvik]

Hi Adnan,

Does this sample work for you?

It is based on the zephyr UART driver sample

echo_bot_with_i2c_and_spi.zip

Regards,
Sigurd Hellesvik

[adnankhalid]

Hello Siguard,

So the sample builds, compiles and flashes but I get nothing on the NRF RTT Terminal. A look at the prj.conf file shows 2 problems:

1) CONFIG_NRFX_SPIM0 was assigned the value y, but got the value n. Missing dependencies:

n

2) CONFIG_NRFX_TWIM1 was assigned the value y, but got the value n. Missing dependencies:

n

I am running nRF Connect SDK v2.1.2 with nRF52 DK (nRF52832) eval board: PCA10040, 2.1.0, 2021.02.

Please advise. Thanks!

Adnan

[Sigurd Hellesvik]

Hi Adnan,

You  are right, I forgot to check the build log.

Instead of using CONFIG_NRFX_SPIM and CONFIG_NRFX_TWIM1, can you instead try to only set spi0/i2c1  in the devicetree?
And enable CONFIG_SPI and CONFIG_I2C.

Then I think the configuration system might handle the rest.

Regards,
Sigurd Hellesvik

[adnankhalid]

Hello Siguard,

So in the echo_bot example I commented out the CONFIG_NRFX_SPIM0 and CONFIG_NRFX_TWIM1 configs in the prj.conf file and the overlay file already had the spi0 and i2c1 enabled as follows:

&spi0 {

    status = "okay";

};

&spi1 {

    status = "disabled";

};

&i2c1 {

    status = "okay";

};

&i2c0 {

    status = "disabled";

};

I built and flashed the sample to the board but again I do not get anything on the RTT.

Please advise.

 

Adnan

 

[adnankhalid]

Hello,

So I added the following to the overlay file:

&spi0 {

    compatible = "nordic,nrf-spim";

    status = "okay";

    sck-pin = <23>;

    mosi-pin = <25>;

    miso-pin = <24>;

    cs-gpios = <&gpio0 22 GPIO_ACTIVE_LOW>;

};

&spi1 {

    status = "disabled";

};

&i2c0 {

    status = "disabled";

};

&i2c1 {

    compatible = "nordic,nrf-twim";

    status = "okay";

};

I added the following to the prj.conf:

#Enable SPI and I2C

CONFIG_SPI=y

CONFIG_I2C=y

CONFIG_SOC_NRF52832_ALLOW_SPIM_DESPITE_PAN_58=y

The following to the KCONFIG:

config CONFIG_SPI_NRFX

    bool "Enable SPI NRFX"

    default y

    select CONFIG_SPI

config CONFIG_I2C_NRFX

    bool "Enable SPI NRFX"

    default y

    select CONFIG_I2C

Now I seem to have access to the SPIM and TWIM drivers!

Please advise if this is the right approach?

Now I am trying to find the equivalent in NCS for the following:

Get image data over the SPI/TWI and send it over BLE to device

Any help/sample code to get this done would be most helpful.

Thanks!

[Sigurd Hellesvik]

Hi,

It looks like it should work.
The following part seems redundant, since you already set CONFIG_SPI and CONFIG_I2C in prj.conf:

adnankhalid said:

The following to the KCONFIG:

config CONFIG_SPI_NRFX

    bool "Enable SPI NRFX"

    default y

    select CONFIG_SPI

config CONFIG_I2C_NRFX

    bool "Enable SPI NRFX"

    default y

    select CONFIG_I2C

To get started with SPI and I2C, see the following:

Zephyr drivers for SPI and I2C.

For C code, have a look at this spi test.

For an I2C example, I always liked https://github.com/crfosse/ncs_projects/tree/main/peripheral_zephyr/i2c.

For how to send serial data over Bluetooth Low Energy, the Peripheral UART sample  should be relevant.

Regards,
Sigurd Hellesvik