RE: nRF9151 DK: spi slave

Pallavi Patil — Fri, 11 Sep 2026 07:24:13 GMT

Hie Aparna,

Thanks for sharing the project. You can read.more on this in our devacademy course

You are missing some files in your app.overlay

&pinctrl {
spi3_default: spi3_default {
group1 {
psels = <NRF_PSEL(SPIS_SCK, 0, 13)>,
<NRF_PSEL(SPIS_MOSI, 0, 11)>,
<NRF_PSEL(SPIS_MISO, 0, 12)>,
<NRF_PSEL(SPIS_CSN, 0, 10)>;
};
};

spi3_sleep: spi3_sleep {
group1 {
psels = <NRF_PSEL(SPIS_SCK, 0, 13)>,
<NRF_PSEL(SPIS_MOSI, 0, 11)>,
<NRF_PSEL(SPIS_MISO, 0, 12)>,
<NRF_PSEL(SPIS_CSN, 0, 10)>;
low-power-enable;
};
};
};

&spi3 {
compatible = "nordic,nrf-spis";
status = "okay";
pinctrl-0 = <&spi3_default>;
pinctrl-1 = <&spi3_sleep>;
pinctrl-names = "default", "sleep";
def-char = <0x00>;
}; Also,when using nrfx directly in Zephyr, you need to manually connect the IRQ. Can you please add this before

nrfx_spis_init:

IRQ_CONNECT(NRFX_IRQ_NUMBER_GET(NRF_SPIS3), IRQ_PRIO_LOWEST,
            nrfx_spis_3_irq_handler, NULL, 0);
irq_enable(NRFX_IRQ_NUMBER_GET(NRF_SPIS3));

Without this, spis_handler will never be called, hence you are not getting any data.

Also can you please verify which NCS version are you using.

Please let me know if this fixes your problem.

Regards

Pallavi

RE: nRF9151 DK: spi slave

Aparna Pacharne — Thu, 10 Sep 2026 05:50:12 GMT

Hi,
I am sharing the code for reference.
devzone.nordicsemi.com/.../6523.nrf.zip

RE: nRF9151 DK: spi slave

Pallavi Patil — Wed, 09 Sep 2026 08:07:51 GMT

From what I can se, the board target is correct.

RE: nRF9151 DK: spi slave

Pallavi Patil — Wed, 09 Sep 2026 08:07:22 GMT

Hie Aparna,

Can you please share more information like device configuration tree, some code snippet where you are initializing the SPIs. This will help us get a better picture to help you diagnose the problem.
Looking forward to your reply.

Regards

Pallavi