c - PlatformIO 构建失败 : undefined reference to http_parser_init

Question

我正在尝试使用 PlaformIO 中 ESP-IDF 框架库中的示例来设置无线更新(OTA)更新。 ota simple_example main.c 文件导入一个名为 esp_http_client.h 的 .h 文件。 esp_http_client 导入另一个名为 http_parser.h 的 .h 文件，这是定义函数 http_parser_init 的地方。我正在 VScode 中的 PlaformIO 中构建这个项目，因此我检查了 c_cpp_properties.json 并且包含了 http_parser.c 和 http_parser.h 目录。我注意到有时 c_cpp_properties 文件存在错误，因此我还在 platform.ini 文件中包含了 http_parser.h 文件目录。

我也遇到了错误:

对 http_parser_execute 的 undefined reference

对 http_parser_url_init 的 undefined reference

对 http_parser_parse_url 的 undefined reference

这些都是在http_parser.h文件中找到的函数

这是我正在使用的 main.c 文件的代码

#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include <stdio.h>
#include "esp_system.h"
#include "esp_wifi.h"
#include "esp_event_loop.h"
#include "esp_log.h"
#include "esp_ota_ops.h"
#include "esp_http_client.h"
#include "esp_flash_partitions.h"
#include "esp_partition.h"

#include "nvs.h"
#include "nvs_flash.h"
#include "main.h"
#define WIFI_SSID SSID
#define WIFI_PASS PASSWORD
#define SERVER_URL FIRMWARE_UPG_URL
#define BUFFSIZE 1024
#define HASH_LEN 32 /* SHA-256 digest length */

static const char *TAG = "native_ota_example";
/*an ota data write buffer ready to write to the flash*/
static char ota_write_data[BUFFSIZE + 1] = { 0 };
//  uint8_t server_cert_pem_start[] asm("_binary_ca_cert_pem_start");
//  uint8_t server_cert_pem_end[] asm("_binary_ca_cert_pem_end");


/* FreeRTOS event group to signal when we are connected & ready to make a request */
static EventGroupHandle_t wifi_event_group;

/* The event group allows multiple bits for each event,
   but we only care about one event - are we connected
   to the AP with an IP? */
const int CONNECTED_BIT = BIT0;

static esp_err_t event_handler(void *ctx, system_event_t *event)
{
    switch (event->event_id) {
    case SYSTEM_EVENT_STA_START:
        esp_wifi_connect();
        break;
    case SYSTEM_EVENT_STA_GOT_IP:
        xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
        break;
    case SYSTEM_EVENT_STA_DISCONNECTED:
        /* This is a workaround as ESP32 WiFi libs don't currently
           auto-reassociate. */
        esp_wifi_connect();
        xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
        break;
    default:
        break;
    }
    return ESP_OK;
}

static void initialise_wifi(void)
{
    tcpip_adapter_init();
    wifi_event_group = xEventGroupCreate();
    ESP_ERROR_CHECK( esp_event_loop_init(event_handler, NULL) );
    wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
    ESP_ERROR_CHECK( esp_wifi_init(&cfg) );
    ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_RAM) );
    wifi_config_t wifi_config = {
        .sta = {
            .ssid = SSID,
            .password = PASSWORD,
        },
    };
    ESP_LOGI(TAG, "Setting WiFi configuration SSID %s...", wifi_config.sta.ssid);
    ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) );
    ESP_ERROR_CHECK( esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config) );
    ESP_ERROR_CHECK( esp_wifi_start() );
}

static void http_cleanup(esp_http_client_handle_t client)
{
    esp_http_client_close(client);
    esp_http_client_cleanup(client);
}

static void __attribute__((noreturn)) task_fatal_error()
{
    ESP_LOGE(TAG, "Exiting task due to fatal error...");
    (void)vTaskDelete(NULL);

    while (1) {
        ;
    }
}

void print_sha256 (const uint8_t *image_hash, const char *label)
{
    char hash_print[HASH_LEN * 2 + 1];
    hash_print[HASH_LEN * 2] = 0;
    for (int i = 0; i < HASH_LEN; ++i) {
        sprintf(&hash_print[i * 2], "%02x", image_hash[i]);
    }
    ESP_LOGI(TAG, "%s: %s", label, hash_print);
}

static void ota_example_task(void *pvParameter)
{

    esp_err_t err;
    /* update handle : set by esp_ota_begin(), must be freed via esp_ota_end() */
    esp_ota_handle_t update_handle = 0 ;
    const esp_partition_t *update_partition = NULL;

    ESP_LOGI(TAG, "Starting OTA example...");

    const esp_partition_t *configured = esp_ota_get_boot_partition();
    const esp_partition_t *running = esp_ota_get_running_partition();

    if (configured != running) {
        ESP_LOGW(TAG, "Configured OTA boot partition at offset 0x%08x, but running from offset 0x%08x",
                 configured->address, running->address);
        ESP_LOGW(TAG, "(This can happen if either the OTA boot data or preferred boot image become corrupted somehow.)");
    }
    ESP_LOGI(TAG, "Running partition type %d subtype %d (offset 0x%08x)",
             running->type, running->subtype, running->address);

    /* Wait for the callback to set the CONNECTED_BIT in the
       event group.
    */
    xEventGroupWaitBits(wifi_event_group, CONNECTED_BIT,
                        false, true, portMAX_DELAY);
    ESP_LOGI(TAG, "Connect to Wifi ! Start to Connect to Server....");

    esp_http_client_config_t config = {
        .url = SERVER_URL,
        // .cert_pem = (char *)server_cert_pem_start,
    };
    esp_http_client_handle_t client = esp_http_client_init(&config);
    if (client == NULL) {
        ESP_LOGE(TAG, "Failed to initialise HTTP connection");
        task_fatal_error();
    }
    err = esp_http_client_open(client, 0);
    if (err != ESP_OK) {
        ESP_LOGE(TAG, "Failed to open HTTP connection: 1");
        esp_http_client_cleanup(client);
        task_fatal_error();
    }
    esp_http_client_fetch_headers(client);

    update_partition = esp_ota_get_next_update_partition(NULL);
    ESP_LOGI(TAG, "Writing to partition subtype %d at offset 0x%x",
             update_partition->subtype, update_partition->address);
    assert(update_partition != NULL);

    err = esp_ota_begin(update_partition, OTA_SIZE_UNKNOWN, &update_handle);
    if (err != ESP_OK) {
        ESP_LOGE(TAG, "esp_ota_begin failed 3");
        http_cleanup(client);
        task_fatal_error();
    }
    ESP_LOGI(TAG, "esp_ota_begin succeeded");

    int binary_file_length = 0;
    /*deal with all receive packet*/
    while (1) {
        int data_read = esp_http_client_read(client, ota_write_data, BUFFSIZE);
        if (data_read < 0) {
            ESP_LOGE(TAG, "Error: SSL data read error");
            http_cleanup(client);
            task_fatal_error();
        } else if (data_read > 0) {
            err = esp_ota_write( update_handle, (const void *)ota_write_data, data_read);
            if (err != ESP_OK) {
                http_cleanup(client);
                task_fatal_error();
            }
            binary_file_length += data_read;
            ESP_LOGD(TAG, "Written image length %d", binary_file_length);
        } else if (data_read == 0) {
            ESP_LOGI(TAG, "Connection closed,all data received");
            break;
        }
    }
    ESP_LOGI(TAG, "Total Write binary data length : %d", binary_file_length);

    if (esp_ota_end(update_handle) != ESP_OK) {
        ESP_LOGE(TAG, "esp_ota_end failed!");
        http_cleanup(client);
        task_fatal_error();
    }

    if (esp_ota_get_running_partition() == update_partition) {
        ESP_LOGI(TAG, "The current running firmware is same as the firmware just downloaded");
        int i = 0;
        ESP_LOGI(TAG, "When a new firmware is available on the server, press the reset button to download it");
        while(1) {
            ESP_LOGI(TAG, "Waiting for a new firmware ... %d", ++i);
            vTaskDelay(2000 / portTICK_PERIOD_MS);
        }
    }

    err = esp_ota_set_boot_partition(update_partition);
    if (err != ESP_OK) {
        ESP_LOGE(TAG, "esp_ota_set_boot_partition failed 2!");
        http_cleanup(client);
        task_fatal_error();
    }
    ESP_LOGI(TAG, "Prepare to restart system!");
    esp_restart();
    return ;
}


void app_main()
{

    // Initialize NVS.
    nvs_flash_init();
        // OTA app partition table has a smaller NVS partition size than the non-OTA
        // partition table. This size mismatch may cause NVS initialization to fail.
        // If this happens, we erase NVS partition and initialize NVS again.
        ESP_ERROR_CHECK(nvs_flash_erase());
        nvs_flash_init();


    initialise_wifi();
    xTaskCreate(&ota_example_task, "ota_example_task", 8192, NULL, 5, NULL);
}

http_parser.h:file

esp_http_client:file

我不明白当这些函数在 esp_parser.h 文件中定义时我应该在哪里定义这些函数，或者我应该做什么才能避免出现此错误。

Answer 1

我也遇到了同样的问题。

我通过在没有 PlatformIO 的情况下编译程序解决了这个问题。

https://docs.espressif.com/projects/esp-idf/en/latest/get-started/

这里是安装工具链的指南。

问候