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

[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