Connecting nRF9160DK and nRF7002DK for testing SCAN sample.

[Gova]

Dear team,

I am trying to test Wi-Fi scan sample with the kits nRF9160DK and nRF7002DK. I am aware of nRF7002-EK and it is taking time to get it. Since we are running out of time, we are trying to accomplish the same using previously said two DKs.

In the hardware,

I saw the ticket  nRF9160 and nRF7002 Wi-Fi controller connection and made the following connections.

Board	nRF9160-DK(P3 & P4)	nRF7002-DK (P24)
SPI CLK	P0.13	P0.17
SPI CS	P0.10	P0.18
SPI MOSI	P0.11	P0.13
SPI MISO	P0.12	P0.14
HOST-IRQ	P0.07	P0.23
IOVDD-CTR	P0.00	P0.31
BUCKEN	P0.01	P0.12

Also I soldered the SBs from SB20 to SB25 on nRF7002DK.

I DID NOT remove the 0R Resistors R26-R31.

I powered both DKs seperately using USB cables.

Now, the firmware part.

I programmed nRF5340 on nRF7002 DK with basic blinky, to make sure it is not using any other GPIOs, that we are using.

Now, I opened the Wi-Fi Scan sample in VS Code.

Toolchain used is v2.4.1.

I added the overlay-scan-only.conf, nrf9160dk_nrf9160_ns.overlay under boards.

I added -DSHIELD:STRING="nrf7002ek" and -DOVERLAY_CONFIG=overlay-scan-only.conf under CMake arguments in build configuration.

Build is successful, but when programmed, no UART output is seen.

Please help.

Thanks a ton in advance.

[Gova]

Hi,

nRF9160-DK version - 1.1.0

nRF7002-DK version - 0.7.2

Can you help me to reduce the speed of SPIM? Where should I do it?

Thanks.

[Gova]

Hi,

Just attaching the image of the boards, just to show how I have connected.

[Håkon Alseth]

Hi,

 

Gova said:

nRF7002-DK version - 0.7.2

This should work similar to the nRF7002-DK v1.0.2 that I used.

 

Gova said:

Can you help me to reduce the speed of SPIM? Where should I do it?

You can alter this in the overlay for spi3:

&arduino_spi {
	status = "okay";

	nrf700x: nrf7002@0 {
		compatible = "nordic,nrf700x-spi";
		status = "okay";
		reg = <0>;
		spi-max-frequency = <DT_FREQ_M(1)>;

		iovdd-ctrl-gpios = <&arduino_header 6 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>;    /* D0 */
		bucken-gpios = <&arduino_header 7 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>;        /* D1 */
		host-irq-gpios = <&arduino_header 13 GPIO_ACTIVE_HIGH>;     /* D7 */
	};
};

Kind regards,

Håkon

[Gova]

Hi Hakon,

I reduced the speed of SPIM, and still facing the same issue.

Also, i found these threads regarding this error.

 wifi_nrf library boot_sig check failed 

 Wi-Fi Scan Sample causing error (Boot_sig check failed for RPU(0)) 

But, it seems like they have modified the SCAN sample, which we have not done.

But do we have anything to do with OTP memory access permission? If so, How? If not, please help me with this error.

Which SDK version are you using?

Thanks.

[Håkon Alseth]

Hi,

 

Gova said:

Which SDK version are you using?

I used v2.4.0

Gova said:

Also, i found these threads regarding this error.

The error you are seeing is due to nrf9160 not being able to contact the nRF7002 via SPI, and it is a generic catch-all error.

Gova said:

But do we have anything to do with OTP memory access permission? If so, How? If not, please help me with this error.

When using the nRF7002-DK, the crystal is trimmed and MAC address fields are already populated. This will be a necessary step if you populate your own custom board with a blank 7002 IC.

 

Could you scope the pins, especially the IOVDD/BUCKEN/HOST_IRQ to see how they behave?

 

Kind regards,

Håkon