SPI frequency issue on nRF7002 DK

RE: SPI frequency issue on nRF7002 DK

Peter Langer Keysoft — Wed, 29 Oct 2025 08:21:35 GMT

Hi,

Try measuring it with an oscilloscope to see the shape of the signal.

Check you "drive-mode" for SPI pins in overlay.

And finally try disconnecting the logic analyzer. I had a similar problem, but with wires about 15 cm long and an external SoC - after disconnecting the logic analyzer the nRF7002-EK started working.

KeySoft

RE: SPI frequency issue on nRF7002 DK

Simonr — Wed, 29 Jan 2025 08:13:36 GMT

Just so we're on the same page. The SPI pins aren't connected to anything here, you're just checking with a logic analyzer, correct? Are you certain the analyzer supports higher frequencies?

I don't see this being a problem I'm afraid. If the SPI max frequency is the only thing you changed there shouldn't be any reason for it to not operate. You can try adding some debug logging in your configs and upload the full log here for us to review.

Best regards,

Simon

RE: SPI frequency issue on nRF7002 DK

QuangPhuoc — Mon, 27 Jan 2025 16:03:34 GMT

Thank you for reply

1. What pins are you using for SPI data pins in your sample here?

My full device tree:

&spi1 {

compatible = "nordic,nrf-spim";

status = "okay";

pinctrl-0 = <&spi1_default>;

pinctrl-1 = <&spi1_sleep>;

pinctrl-names = "default", "sleep";

cs-gpios = <&gpio0 25 GPIO_ACTIVE_LOW>;

max-frequency = <0x7a1200>;

gendev: gendev@0 {

compatible = "vnd,spi-device";

reg = <0>;

spi-max-frequency = <125000>; // <= THIS CHANGE

label = "GenDev";

};

&pinctrl {
spi1_default: spi1_default {
group1 {
psels = <NRF_PSEL(SPIM_SCK, 0, 6)>,
<NRF_PSEL(SPIM_MOSI, 0, 7)>,
<NRF_PSEL(SPIM_MISO, 0, 26)>;
};
};
spi1_sleep: spi1_sleep {
group1 {
psels = <NRF_PSEL(SPIM_SCK, 0, 6)>,
<NRF_PSEL(SPIM_MOSI, 0, 7)>,
<NRF_PSEL(SPIM_MISO, 0, 26)>;
low-power-enable;
};
};
};

I got this on the sample refer the SPI tutorial of Nordic https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-5-serial-peripheral-interface-spi/topic/zephyr-spi-api/

You can also check my full code in the attachment

2. Note that some of the pins are connected to other function on the DK already

I'm using nRF7002-DK (PCA10143). I checked this don't use the pin 0.06, 0.07, 0.26 and 0.25.

Below is the detailed image of the board I used.

3. What kind of SPI device are you trying to communicate with here?

That's just a sample. There I try to send SPI signal and read it with logic analyzer.

The problem is when I config the spi-max-frequency = <125000>;, I can capture the signal on logic analyer. But when I changed this to spi-max-frequency = <1000000>;, I just get the CS signal and no MOSI or SCK signal (See the image I attached in the original post)

4. Do you see any logging from the application when running this project on your end?

I don't see any unusual phenomenon on the Log (Use printf). LED flashes normally

You can check the operation on the attachment

If you need more information, please let me know

Have a nice day

RE: SPI frequency issue on nRF7002 DK

Simonr — Mon, 27 Jan 2025 13:41:54 GMT

What pins are you using for SPI data pins in your sample here? Note that some of the pins are connected to other function on the DK already. Please use the DK user guide for reference here.

What kind of SPI device are you trying to communicate with here? And do you see any logging from the application when running this project on your end?

Best regards,

Simon