asio: initial idf port of asio library without ssl

* Original commit: espressif/esp-idf@1ef13c524c
2025-07-19 05:22:21 +02:00 · 2018-05-29 11:25:24 +02:00
parent 51a50db0fd
commit 5472d5c52f
45 changed files with 2068 additions and 0 deletions
--- a/examples/protocols/asio/tcp_echo_server/components/wifi_asio.cpp
+++ b/examples/protocols/asio/tcp_echo_server/components/wifi_asio.cpp
@ -0,0 +1,136 @@
+/* Common WiFi Init as STA for ASIO examples
+
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+*/
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/event_groups.h"
+#include "esp_system.h"
+#include "esp_wifi.h"
+#include "esp_event_loop.h"
+#include "esp_log.h"
+#include "nvs_flash.h"
+#include "driver/uart.h"
+#include "esp_console.h"
+#include "esp_vfs_dev.h"
+
+#include "lwip/err.h"
+#include "lwip/sys.h"
+
+#include <cstring>
+
+/* The examples use simple WiFi configuration that you can set via
+   'make menuconfig'.
+
+   If you'd rather not, just change the below entries to strings with
+   the config you want - ie #define EXAMPLE_WIFI_SSID "mywifissid"
+*/
+#define EXAMPLE_ESP_WIFI_SSID      CONFIG_ESP_WIFI_SSID
+#define EXAMPLE_ESP_WIFI_PASS      CONFIG_ESP_WIFI_PASSWORD
+
+/* FreeRTOS event group to signal when we are connected*/
+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 WIFI_CONNECTED_BIT = BIT0;
+
+static const char *TAG = "asio example wifi init";
+
+/**
+ *  Definition of ASIO main method, which is called after network initialized
+ */
+void asio_main();
+
+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:
+        ESP_LOGI(TAG, "got ip:%s",
+                 ip4addr_ntoa(&event->event_info.got_ip.ip_info.ip));
+        xEventGroupSetBits(wifi_event_group, WIFI_CONNECTED_BIT);
+        break;
+    case SYSTEM_EVENT_AP_STACONNECTED:
+        ESP_LOGI(TAG, "station:" MACSTR " join, AID=%d",
+                 MAC2STR(event->event_info.sta_connected.mac),
+                 event->event_info.sta_connected.aid);
+        break;
+    case SYSTEM_EVENT_AP_STADISCONNECTED:
+        ESP_LOGI(TAG, "station:" MACSTR "leave, AID=%d",
+                 MAC2STR(event->event_info.sta_disconnected.mac),
+                 event->event_info.sta_disconnected.aid);
+        break;
+    case SYSTEM_EVENT_STA_DISCONNECTED:
+        esp_wifi_connect();
+        xEventGroupClearBits(wifi_event_group, WIFI_CONNECTED_BIT);
+        break;
+    default:
+        break;
+    }
+    return ESP_OK;
+}
+
+void wifi_init_sta()
+{
+    wifi_event_group = xEventGroupCreate();
+
+    tcpip_adapter_init();
+    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));
+    wifi_config_t wifi_config;
+    // zero out the config struct to ensure defaults are setup
+    memset(&wifi_config, 0, sizeof(wifi_sta_config_t));
+    // only copy ssid&password from example config
+    strcpy((char*)(wifi_config.sta.ssid), EXAMPLE_ESP_WIFI_SSID);
+    strcpy((char*)(wifi_config.sta.password), EXAMPLE_ESP_WIFI_PASS);
+
+    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() );
+
+    ESP_LOGI(TAG, "wifi_init_sta finished.");
+    ESP_LOGI(TAG, "connect to ap SSID:%s password:%s",
+             EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);
+}
+
+extern "C" void app_main()
+{
+    //Initialize NVS
+    esp_err_t ret = nvs_flash_init();
+    if (ret == ESP_ERR_NVS_NO_FREE_PAGES) {
+      ESP_ERROR_CHECK(nvs_flash_erase());
+      ret = nvs_flash_init();
+    }
+    ESP_ERROR_CHECK(ret);
+    
+    ESP_LOGI(TAG, "ESP_WIFI_MODE_AP");
+    wifi_init_sta();
+
+    // Initialize VFS & UART so we can use std::cout/cin
+    setvbuf(stdin, NULL, _IONBF, 0);
+    setvbuf(stdout, NULL, _IONBF, 0);
+    /* Install UART driver for interrupt-driven reads and writes */
+    ESP_ERROR_CHECK( uart_driver_install( (uart_port_t)CONFIG_CONSOLE_UART_NUM,
+            256, 0, 0, NULL, 0) );
+    /* Tell VFS to use UART driver */
+    esp_vfs_dev_uart_use_driver(CONFIG_CONSOLE_UART_NUM);
+    esp_vfs_dev_uart_set_rx_line_endings(ESP_LINE_ENDINGS_CR);
+    /* Move the caret to the beginning of the next line on '\n' */
+    esp_vfs_dev_uart_set_tx_line_endings(ESP_LINE_ENDINGS_CRLF);
+
+    // wait till we receive IP, so asio realated code can be started
+    xEventGroupWaitBits(wifi_event_group, WIFI_CONNECTED_BIT, 1, 1, portMAX_DELAY);
+
+    // network is ready, let's proceed with ASIO example
+    asio_main();
+}