使用ESP32-C3尝试获取CSI信息的时候，CSI的回调函数往往只能被执行一次或着一次都不会被执行，为什么？

我在使用ESP32-C3尝试获取CSI信息的时候，CSI的回调函数往往只能被执行一次或着一次都不会被执行（像是没收到CSI?)。
      我使用的开发板是ESP32-C3和ESP32-WROOM模组，idf是4.4版本，代码是基于idf中exampleswifigetting_startedstation例程改写的，具体方式是在WIFI_EVENT_STA_START事件后依次调用esp_wifi_set_csi(1)、esp_wifi_set_csi_config(&configuration_csi)、esp_wifi_set_csi_rx_cb(&_wifi_csi_cb, NULL)。但似乎最终并没有正确收到CSI。
      我参考了https://stevenmhernandez.github.io/ESP32-CSI-Tool/的代码，但直接编译该tool-kit代码现象也是没有收到CSI。
      CSI的功能具体需要怎么使用呢？在idf文档里也没有找到相关资料。

我的代码如下，除了用注释和*标出来的以外，都是station例程里的内容（因为具体是哪里的问题也不知道只能全放上来了）：
Code: Select all
#define EXAMPLE_ESP_MAXIMUM_RETRY  CONFIG_ESP_MAXIMUM_RETRY/* FreeRTOS event group to signal when we are connected*/static EventGroupHandle_t s_wifi_event_group;/* The event group allows multiple bits for each event, but we only care about two events: * - we are connected to the AP with an IP * - we failed to connect after the maximum amount of retries */#define WIFI_CONNECTED_BIT BIT0#define WIFI_FAIL_BIT      BIT1static const char *TAG = "wifi station";static int s_retry_num = 0;void csi_init(void);static void event_handler(void* arg, esp_event_base_t event_base,                                int32_t event_id, void* event_data){    if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {            csi_init();//***********************************************************************************        esp_wifi_connect();    } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {        if (s_retry_num < EXAMPLE_ESP_MAXIMUM_RETRY) {            esp_wifi_connect();            s_retry_num++;            ESP_LOGI(TAG, "retry to connect to the AP");        } else {            xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);        }        ESP_LOGI(TAG,"connect to the AP fail");    } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {        ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;        ESP_LOGI(TAG, "got ip:" IPSTR, IP2STR(&event->ip_info.ip));        s_retry_num = 0;        xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);    }}//***********************************************************************************void _wifi_csi_cb(void *ctx, wifi_csi_info_t *data) {    wifi_csi_info_t d = data[0];    char mac[20] = {0};    sprintf(mac, "%02X:%02X:%02X:%02X:%02X:%02X", d.mac[0], d.mac[1], d.mac[2], d.mac[3], d.mac[4], d.mac[5]);    printf("CSI_DATA,");    printf("%s,", mac);    // https://github.com/espressif/esp-idf/blob/9d0ca60398481a44861542638cfdc1949bb6f312/components/esp_wifi/include/esp_wifi_types.h#L314    printf("%d,", d.rx_ctrl.rssi);    。。。    printf("n");    vTaskDelay(0);}void _print_csi_csv_header() {    char *header_str = "type,role,mac,rssi,rate,sig_mode,mcs,bandwidth,smoothing,not_sounding,aggregation,stbc,fec_coding,sgi,noise_floor,ampdu_cnt,channel,secondary_channel,local_timestamp,ant,sig_len,rx_state,real_time_set,real_timestamp,len,CSI_DATAn";    printf(header_str);}void csi_init() {    ESP_ERROR_CHECK(esp_wifi_set_csi(1));    // @See: https://github.com/espressif/esp-idf/blob/master/components/esp_wifi/include/esp_wifi_types.h#L401    wifi_csi_config_t configuration_csi;    configuration_csi.lltf_en = 1;    configuration_csi.htltf_en = 1;    configuration_csi.stbc_htltf2_en = 1;    configuration_csi.ltf_merge_en = 1;    configuration_csi.channel_filter_en = 1;    configuration_csi.manu_scale = 0;    ESP_ERROR_CHECK(esp_wifi_set_csi_config(&configuration_csi));    ESP_ERROR_CHECK(esp_wifi_set_csi_rx_cb(&_wifi_csi_cb, NULL));    _print_csi_csv_header();}//***********************************************************************************void wifi_init_sta(void){    s_wifi_event_group = xEventGroupCreate();    ESP_ERROR_CHECK(esp_netif_init());    ESP_ERROR_CHECK(esp_event_loop_create_default());    esp_netif_create_default_wifi_sta();    wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();    cfg.csi_enable = 1;//***********************************************************************************    ESP_ERROR_CHECK(esp_wifi_init(&cfg));    esp_wifi_set_ps(WIFI_PS_NONE);    esp_event_handler_instance_t instance_any_id;    esp_event_handler_instance_t instance_got_ip;    ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT,                                                        ESP_EVENT_ANY_ID,                                                        &event_handler,                                                        NULL,                                                        &instance_any_id));    ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT,                                                        IP_EVENT_STA_GOT_IP,                                                        &event_handler,                                                        NULL,                                                        &instance_got_ip));    wifi_config_t wifi_config = {        .sta = {            .ssid = EXAMPLE_ESP_WIFI_SSID,            .password = EXAMPLE_ESP_WIFI_PASS,                        .channel = 8,//***********************************************************************************            /* Setting a password implies station will connect to all security modes including WEP/WPA.             * However these modes are deprecated and not advisable to be used. Incase your Access point             * doesn't support WPA2, these mode can be enabled by commenting below line */        },    };    ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA) );    ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, &wifi_config) );    ESP_ERROR_CHECK(esp_wifi_start() );    ESP_LOGI(TAG, "wifi_init_sta finished.");    /* Waiting until either the connection is established (WIFI_CONNECTED_BIT) or connection failed for the maximum     * number of re-tries (WIFI_FAIL_BIT). The bits are set by event_handler() (see above) */    EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,            WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,            pdFALSE,            pdFALSE,            portMAX_DELAY);    /* xEventGroupWaitBits() returns the bits before the call returned, hence we can test which event actually     * happened. */    if (bits & WIFI_CONNECTED_BIT) {        ESP_LOGI(TAG, "connected to ap SSID:%s password:%s",                 EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);    } else if (bits & WIFI_FAIL_BIT) {        ESP_LOGI(TAG, "Failed to connect to SSID:%s, password:%s",                 EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);    } else {        ESP_LOGE(TAG, "UNEXPECTED EVENT");    }    /* The event will not be processed after unregister */    ESP_ERROR_CHECK(esp_event_handler_instance_unregister(IP_EVENT, IP_EVENT_STA_GOT_IP, instance_got_ip));    ESP_ERROR_CHECK(esp_event_handler_instance_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID, instance_any_id));    vEventGroupDelete(s_wifi_event_group);}void app_main(void){    //Initialize NVS    esp_err_t ret = nvs_flash_init();    if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {      ESP_ERROR_CHECK(nvs_flash_erase());      ret = nvs_flash_init();    }    ESP_ERROR_CHECK(ret);    ESP_LOGI(TAG, "ESP_WIFI_MODE_STA");    wifi_init_sta();}
日志如下，在619行的时候收到了一条CSI，后续就没反应了，最后显示连接到路由器后一直没有其他输出了。Code: Select all
I (439) wifi_init: tcp mbox: 6I (439) wifi_init: tcp tx win: 5744I (449) wifi_init: tcp rx win: 5744I (449) wifi_init: tcp mss: 1440I (449) wifi_init: WiFi IRAM OP enabledI (459) wifi_init: WiFi RX IRAM OP enabledI (459) wifi:Set ps type: 0I (469) phy_init: phy_version 500,985899c,Apr 19 2021,16:05:08I (579) wifi:set rx active PTI: 0, rx ack PTI: 0, and default PTI: 0I (589) wifi:mode : sta (7c:df:a1:66:d4:50)I (589) wifi:enable tsftype,role,mac,rssi,rate,sig_mode,mcs,bandwidth,smoothing,not_sounding,aggregation,stbc,fec_coding,sgi,noise_floor,ampdu_cnt,channel,secondary_channel,local_timestamp,ant,sig_len,rx_state,real_time_set,real_timestamp,len,CSI_DATAI (609) wifi station: wifi_init_sta finished.I (609) wifi:new:<1,1>, old:<1,0>, ap:<255,255>, sta:<1,1>, prof:1I (619) wifi:state: init -> auth (b0)CSI_DATA,0E:96:E6:79:97:B1,-74,11,0,0,0,0,0,0,0,0,0,-96,0,1,1,611964,0,419,0,I(629) wifi:state: auth -> assoc (0)I (639) wifi:state: assoc -> run (10)I (649) wifi:connected with TP-LINK_235, aid = 2, channel 1, 40U, bssid = 34:96:72:38:fb:70I (649) wifi:security: WPA2-PSK, phy: bgn, rssi: -49I (649) wifi:pm start, type: 0I (659) wifi:set rx beacon pti, rx_bcn_pti: 0, bcn_timeout: 0, mt_pti: 25000, mt_time: 10000W (669) wifi:idx:0 (ifx:0, 34:96:72:38:fb:70), tid:0, ssn:0, winSize:64I (699) wifi:BcnInt:102400, DTIM:1I (1349) esp_netif_handlers: sta ip: 192.168.2.102, mask: 255.255.255.0, gw: 192.168.2.1I (1349) wifi station: got ip:192.168.2.102I (1349) wifi station: connected to ap SSID:*** password:***