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  • Case ID: 360734
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Configure and Connect nRF7002 to nRF52840 on SDK 2.2.2

Yimin Tang

I am using nRF52840 as host processor. Now I need to connect to nRF7002 for WiFi usage. I am using ncs 2.2.2 SDK. I have a few questions?
1. Does nRF7002 work on v2.2.2? I created the nRF7002 device on the device tree with "nordic,nrf7002-spi" compatible . However, I cannot link to it. The CONFIG_NRF700X_SPI=y is not supported.

error: undefined reference to `__device_dts_ord_133'

2. Can you provide an example of configure and link nRF7002 to nRF52840 on v2.2.2 SDK?

3. If I have to move to higher version of SDK, what is the steps to do the upgrade?

My device tree:

&spi1 {
compatible = "nordic,nrf-spim";
status = "okay";
cs-gpios = <&gpio0 20 GPIO_ACTIVE_LOW>;
pinctrl-0 = <&spi1_default>;
pinctrl-1 = <&spi1_sleep>;
pinctrl-names = "default", "sleep";

nrf7002: nrf7002@0 {
compatible = "nordic,nrf7002-spi";
status = "okay";
reg = <0>; /* SPI chip select index */
spi-max-frequency = <8000000>; /* 8 MHz */
/*duplex = "full";*/ /* required for SPI_CONFIG_DT */
/*frame-format = "motorola";*/ /* required for SPI_CONFIG_DT */
label = "nrf7002";

/* GPIOs for control signals */
iovdd-ctrl-gpios = <&gpio0 10 GPIO_ACTIVE_HIGH>;
bucken-gpios = <&gpio0 11 GPIO_ACTIVE_HIGH>;
host-irq-gpios = <&gpio1 1 GPIO_ACTIVE_HIGH>;

/* Optional: COEX interface */
coex {
compatible = "nordic,nrf700x-coex";
grant-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
req-gpios = <&gpio1 3 GPIO_ACTIVE_HIGH>;
/*prio-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;*/


status0-gpios = <&gpio1 5 GPIO_ACTIVE_HIGH>;
/*status1-gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>;*/
};
};
};

My code:
const struct device *nrf7002_dev = DEVICE_DT_GET(DT_NODELABEL(nrf7002));

if (!device_is_ready(nrf7002_dev))
{
LOG_ERR("SPI device not ready\n");
return -1;
}
else
{
LOG_INF("SPI device READY\n");
}

Thank you.

Parents Reply Children
  • 0 in reply to Håkon Alseth

    Thanks Hakon,

    Our current hardware is using nRF52840 with nRF7002. It takes time for a new hardware with different nRF processor with large RAM. For now, I am just using our current hardware to bring up the WiFi. So removed all other components in our application to save resources. 

    I ported over the "sta" sample. However, I could not get valid wifi interface.   

    struct net_if *iface = net_if_get_first_wifi();

    if (!iface)
    {
    LOG_ERR("Failed to get Wi-Fi interface");
    return -1;
    }

    Here is my devicetree configuration.

    chosen {
    ...
    zephyr,wifi = &wlan0;
    };

    &spi1 {
    compatible = "nordic,nrf-spim";
    status = "okay";
    cs-gpios = <&gpio0 20 GPIO_ACTIVE_LOW>;
    pinctrl-0 = <&spi1_default>;
    pinctrl-1 = <&spi1_sleep>;
    pinctrl-names = "default", "sleep";

    nrf70: nrf7002@0 {
    compatible = "nordic,nrf7002-spi";
    status = "okay";

    reg = <0>;
    spi-max-frequency = <DT_FREQ_M(8)>;

    bucken-gpios = <&gpio1 13 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>;  => not used. high always
    iovdd-ctrl-gpios = <&gpio1 14 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>;  => same as above
    host-irq-gpios = <&gpio1 1 GPIO_ACTIVE_HIGH>;
    //srrf-switch-gpios = <&gpio1 13 GPIO_ACTIVE_HIGH>;


    wifi-max-tx-pwr-2g-dsss = <21>;
    wifi-max-tx-pwr-2g-mcs0 = <16>;
    wifi-max-tx-pwr-2g-mcs7 = <16>;
    wifi-max-tx-pwr-5g-low-mcs0 = <13>;
    wifi-max-tx-pwr-5g-low-mcs7 = <13>;
    wifi-max-tx-pwr-5g-mid-mcs0 = <13>;
    wifi-max-tx-pwr-5g-mid-mcs7 = <13>;
    wifi-max-tx-pwr-5g-high-mcs0 = <12>;
    wifi-max-tx-pwr-5g-high-mcs7 = <12>;

    wlan0: wlan0 {
    compatible = "nordic,wlan";
    };

    wlan1: wlan1 {
    compatible = "nordic,wlan";
    };
    };
    };

    I looked into the Zephyr net_if.c file.

    struct net_if *net_if_get_first_wifi(void)
    {
    printk("\nnet_if_get_first_wifi is called\n");  ===> Reached here

    STRUCT_SECTION_FOREACH(net_if, iface)
    {
    printk("\nnet_if_get_first_wifi inside");   ==> NOT reached here.
    if (net_if_is_wifi(iface)) {
    return iface;
    }
    }
    return NULL;
    }


    I copied over all the kconfig from "sta" example.

    CONFIG_NETWORKING=y
    CONFIG_NET_SOCKETS=y
    CONFIG_NET_LOG=y
    CONFIG_NET_IPV4=y
    CONFIG_NET_UDP=y
    CONFIG_NET_TCP=y
    CONFIG_NET_DHCPV4=y
    CONFIG_NET_PKT_RX_COUNT=8
    CONFIG_NET_PKT_TX_COUNT=8

    # Zephyr Network Management API
    CONFIG_NET_MGMT=y
    CONFIG_NET_MGMT_EVENT=y
    CONFIG_NET_MGMT_EVENT_INFO=y

    # Wi-Fi Core Drivers and Supplicant
    CONFIG_WIFI=y
    CONFIG_WIFI_NRF70=y

    # WPA supplicant
    CONFIG_WIFI_NM_WPA_SUPPLICANT=y
    CONFIG_WIFI_READY_LIB=y
    CONFIG_NRF_WIFI_RPU_RECOVERY=y

    CONFIG_WIFI_MGMT_EXT=y
    CONFIG_WIFI_CREDENTIALS=y
    CONFIG_WIFI_CREDENTIALS_STATIC=y
    CONFIG_WIFI_CREDENTIALS_STATIC_SSID="RMED-AP"
    CONFIG_WIFI_CREDENTIALS_STATIC_PASSWORD="Rmed24Ghz"

    # Memory Optimizations for Wi-Fi Stack
    CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096
    CONFIG_NET_MGMT_EVENT_STACK_SIZE=4096
    CONFIG_MAIN_STACK_SIZE=4096

    CONFIG_NET_CONFIG_MY_IPV4_ADDR="192.168.1.99"
    CONFIG_NET_CONFIG_MY_IPV4_NETMASK="255.255.255.0"
    CONFIG_NET_CONFIG_MY_IPV4_GW="192.168.1.1"

    CONFIG_NET_IF_LOG_LEVEL_DBG=y
    CONFIG_WIFI_LOG_LEVEL_DBG=y
    CONFIG_NET_L2_ETHERNET=y

    #=================================
    # Networking
    CONFIG_NET_BUF_RX_COUNT=8
    CONFIG_NET_BUF_TX_COUNT=16
    CONFIG_NRF70_RX_NUM_BUFS=16
    CONFIG_HEAP_MEM_POOL_IGNORE_MIN=y
    CONFIG_NET_TC_TX_COUNT=1

    CONFIG_NET_IF_UNICAST_IPV4_ADDR_COUNT=1
    CONFIG_NET_MAX_CONTEXTS=5
    CONFIG_NET_CONTEXT_SYNC_RECV=y

    CONFIG_INIT_STACKS=y

    CONFIG_NET_L2_ETHERNET=y

    CONFIG_NET_CONFIG_SETTINGS=y
    CONFIG_NET_CONFIG_INIT_TIMEOUT=0

    CONFIG_NET_SOCKETS_POLL_MAX=10

    # Memories
    CONFIG_NET_TX_STACK_SIZE=4096
    CONFIG_NET_RX_STACK_SIZE=4096

    # Debugging
    CONFIG_STACK_SENTINEL=y
    CONFIG_DEBUG_COREDUMP=y
    CONFIG_DEBUG_COREDUMP_BACKEND_LOGGING=y
    CONFIG_DEBUG_COREDUMP_MEMORY_DUMP_MIN=y
    CONFIG_SHELL_CMDS_RESIZE=n


    # Kernel options
    CONFIG_ENTROPY_GENERATOR=y

    # Logging
    #CONFIG_POSIX_CLOCK=y

    # printing of scan results puts pressure on queues in new locking
    # design in net_mgmt. So, use a higher timeout for a crowded
    # environment.
    CONFIG_NET_MGMT_EVENT_QUEUE_TIMEOUT=5000

    Anything I missed?
    Do I have to have a flawless hardware to grap the wifi interface?

    Can you give me a clue?

    Thank you.

    Yimin

      

     

  • 0 in reply to Yimin Tang

    Hi Yimin,

     

    Yimin Tang said:
    I ported over the "sta" sample. However, I could not get valid wifi interface.   

    you shouldn't have to change the code at all; the only thing you need is to define the pin-out/connection towards the nRF7002.

    The sample intended to work for nRF52840DK + nRF7002EK.

     

    I assume you got a RPU error message on the console?

     

    I do not see any specific issue with your overlay:

    Yimin Tang said:

    &spi1 {
    compatible = "nordic,nrf-spim";
    status = "okay";
    cs-gpios = <&gpio0 20 GPIO_ACTIVE_LOW>;
    pinctrl-0 = <&spi1_default>;
    pinctrl-1 = <&spi1_sleep>;
    pinctrl-names = "default", "sleep";

    nrf70: nrf7002@0 {
    compatible = "nordic,nrf7002-spi";
    status = "okay";

    reg = <0>;
    spi-max-frequency = <DT_FREQ_M(8)>;

    bucken-gpios = <&gpio1 13 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>;  => not used. high always
    iovdd-ctrl-gpios = <&gpio1 14 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>;  => same as above
    host-irq-gpios = <&gpio1 1 GPIO_ACTIVE_HIGH>;
    //srrf-switch-gpios = <&gpio1 13 GPIO_ACTIVE_HIGH>;

     

    Are you testing on a DK or your own hardware? If using DK, P0.20 is connected to the external flash.

    What is the pins used for spi1_default?

    Yimin Tang said:
    bucken-gpios = <&gpio1 13 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>;  => not used. high always
    iovdd-ctrl-gpios = <&gpio1 14 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>;  => same as above

    The comments here, what do you mean by "not used, high always"?

     

    Kind regards,

    Håkon

  • 0 in reply to Håkon Alseth

    Hi Hakon,

    I am testing on my our hardware. I do not have a DK board. Here is the SPI pin configuration:

    /* For new design: Need to add a WIFI SPI
    SCK 0, 6
    MISO 0, 7
    MOSI 0, 4 */
    spi1_default: spi1_default {
    group1 {
    psels = <NRF_PSEL(SPIM_SCK, 0, 6)>,
    <NRF_PSEL(SPIM_MISO, 0, 7)>,
    <NRF_PSEL(SPIM_MOSI, 0, 4)>;
    };
    };

    spi1_sleep: spi1_sleep {
    group1 {
    psels = <NRF_PSEL(SPIM_SCK, 0, 6)>,
    <NRF_PSEL(SPIM_MISO, 0, 7)>,
    <NRF_PSEL(SPIM_MOSI, 0, 4)>;
    low-power-enable;
    };
    };
    };

    The error I got is:

    struct net_if *iface = net_if_get_first_wifi();

    if (!iface)
    {
    LOG_ERR("Failed to get Wi-Fi interface");  ==> Got this....
    return -1;
    }

    We used a GPIO from an IOExpander for bucken-gpios.

    Is iovdd-ctrl-gpios the pin48 of NRF7002-QFAA-R? If so, we pulled it high. 

    Thanks, 

    Yimin

  • 0 in reply to Yimin Tang

    I also found that there are some debug/warning messages before the application starts. I believe they are from net intialization during  POST_KERNEL stage.

    Net MGMT initialized: queue of 5 entries, stack size of 4096
    [00:00:01.124,084] <dbg> net_if: net_if_init: (main):
    [00:00:01.124,603] <err> net_if: There is no network interface to work with!
    [00:00:01.125,091] <dbg> net_if: net_if_post_init: (main):
    *** Booting nRF Connect SDK v2.9.3-6961c01f95c2 ***
    *** Using Zephyr OS v3.7.99-aa34a5632971 ***
    [00:00:01.126,037] <wrn> net_config: No auto-started network interface - network-bound app initialization skipped.

    For some reasons, I see  STRUCT_SECTION_FOREACH(net_if, iface) never get run into because:

     the _net_if_list_start = 20001B70, _net_if_list_end 20001B70. They are the same.

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