Getting Error while connecting nRF7002-EK module to IMXRT1050-EVKB(host) module with spi and use it for wifi scannig

[dev_nxp]

Hi Nordic Team,

We are using the MIMXRT1050-EVK as the host and the nRF7002EK as the Wi-Fi module with an SPI connection. However, we are encountering frequent errors that we are unable to fully understand.

I believe the SPI connection is working correctly since the rpu_init and rpu_enable have been successfully verified. The issue occurs specifically when rpu_validate_comms fails.

I have attached the overlay files and logs for your reference.

We are using nRF Connect version v2.9.1 and the sample from ncs/v2.9.1/nrf/samples/wifi/scan.

00> [00:00:05.014,000] <inf> phy_mc_ksz8081: PHY 0 is down
00> [00:00:05.017,000] <inf> wifi_nrf_bus: SPIM spi@40394000: freq = 8 MHz
00> [00:00:05.017,000] <inf> wifi_nrf_bus: SPIM spi@40394000: latency = 0
00> [00:00:05.021,000] <err> wifi_nrf_bus: Error: RPU comms test: sig failed: expected 0x42000020, got 0xffffffff
00>
00> [00:00:05.022,000] <err> wifi_nrf: zep_shim_bus_qspi_dev_add: RPU enable failed with error -1
00> [00:00:05.022,000] <err> wifi_nrf: nrf_wifi_bus_qspi_dev_add: nrf_wifi_osal_bus_qspi_dev_add failed
00> [00:00:05.022,000] <err> wifi_nrf: nrf_wifi_bal_dev_add: Bus dev_add failed
00> [00:00:05.022,000] <err> wifi_nrf: nrf_wifi_hal_dev_add: nrf_wifi_bal_dev_add failed
00> [00:00:05.022,000] <err> wifi_nrf: nrf_wifi_fmac_dev_add: nrf_wifi_hal_dev_add failed
00> [00:00:05.022,000] <err> wifi_nrf: nrf_wifi_fmac_dev_add_zep: nrf_wifi_fmac_dev_add failed
00> [00:00:05.022,000] <err> wifi_nrf: nrf_wifi_if_start_zep: nrf_wifi_fmac_dev_add_zep failed
00> *** Booting nRF Connect SDK v2.9.1-60d0d6c8d42d ***
00> *** Using Zephyr OS v3.7.99-ca954a6216c9 ***

mimxrt1050_evk_mimxrt1052_hyperflash.overlay6378.nrf7002ek.overlay5873.prj.conf

[Elfving]

Hi,

Can you try this bustest, to rule out faulty interfacing between the host and nRF70?

Regards,

Håkon

[dev_nxp]

Hi Hakon, thanks for your time! I'm unable to access the link.

 "mail_id" doesn't have access to Confluence on nordicsemi.atlassian.net.

[Elfving]

Wops. My mistake. 

You can find the test in zephyr/tests/boards/nrf/nrf70/bustest. Build it the way you normally would for your board.

Regards,

Elfving

[dev_nxp]

Hi Håkon,
I actually already tried that. If CONFIG_WIFI_NRF70 is not enabled (which it isn't enabled /tests/boards/nrf/nrf70/bustest), it just skips the rpu_validate_comms() function.
I also tested the system bus and peripheral bus, but those tests failed as well.

00> *** Booting nRF Connect SDK v2.9.1-60d0d6c8d42d ***
00> *** Using Zephyr OS v3.7.99-ca954a6216c9 ***
00> [00:00:00.000,000] <inf> shutdown: Starting mimxrt1050_evk with CPU frequency: 528 MHz
00> 
00> [00:00:00.000,000] <dbg> wifi_nrf_bus: rpu_gpio_config: GPIO configuration done...
00> 
00> [00:00:00.002,000] <dbg> wifi_nrf_bus: rpu_pwron: Bucken = 1, IOVDD = 1
00> 
00> [00:00:00.002,000] <inf> wifi_nrf_bus: SPIM spi@40394000: freq = 9 MHz
00> [00:00:00.002,000] <inf> wifi_nrf_bus: SPIM spi@40394000: latency = 0
00> [00:00:00.002,000] <dbg> wifi_nrf_bus: rpu_wrsr2: Written 0x1 to WRSR2
00> [00:00:00.002,000] <dbg> wifi_nrf_bus: spim_read_reg: err: 0 -> 0 1 1 1 1 1
00> [00:00:00.002,000] <dbg> wifi_nrf_bus: spim_wait_while_rpu_wake_write: RDSR2 = 0x1
00> [00:00:00.002,000] <dbg> wifi_nrf_bus: spim_read_reg: err: 0 -> 0 2 2 2 2 2
00> [00:00:00.002,000] <dbg> wifi_nrf_bus: _spim_wait_while_rpu_awake: RDSR1 = 0x2
00> [00:00:00.002,000] <dbg> wifi_nrf_bus: rpu_clks_on: RPU Clocks ON...
00> [00:00:01.002,000] <inf> shutdown: 
00> WIFI ON Done.
00> 
00> [00:00:01.003,000] <err> shutdown: test_sysbus: SYSBUS R/W failed (0) : read = 0xffffffff, expected = 0x3f3
00> [00:00:01.003,000] <err> shutdown: test_peripbus: PERIP BUS R/W failed (0): read = 0x0
00> [00:00:01.003,000] <inf> shutdown: Going to sleep..
00>