feat(example): Restructure examples folder

examples/protocols/mqtt/main/MQTTEcho.c

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+/*******************************************************************************
+ * Copyright (c) 2014 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * and Eclipse Distribution License v1.0 which accompany this distribution.
+ *
+ * The Eclipse Public License is available at
+ *    http://www.eclipse.org/legal/epl-v10.html
+ * and the Eclipse Distribution License is available at
+ *   http://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * Contributors:
+ *    Ian Craggs - initial API and implementation and/or initial documentation
+ *******************************************************************************/
+
+#include <stddef.h>
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+#include "mqtt/MQTTClient.h"
+
+#include "user_config.h"
+
+#define MQTT_CLIENT_THREAD_NAME         "mqtt_client_thread"
+#define MQTT_CLIENT_THREAD_STACK_WORDS  2048
+#define MQTT_CLIENT_THREAD_PRIO         8
+
+LOCAL xTaskHandle mqttc_client_handle;
+
+static void messageArrived(MessageData* data)
+{
+    printf("Message arrived: %s\n", data->message->payload);
+}
+
+static void mqtt_client_thread(void* pvParameters)
+{
+    printf("mqtt client thread starts\n");
+    MQTTClient client;
+    Network network;
+    unsigned char sendbuf[80], readbuf[80] = {0};
+    int rc = 0, count = 0;
+    MQTTPacket_connectData connectData = MQTTPacket_connectData_initializer;
+
+    pvParameters = 0;
+    NetworkInit(&network);
+    MQTTClientInit(&client, &network, 30000, sendbuf, sizeof(sendbuf), readbuf, sizeof(readbuf));
+
+    char* address = MQTT_BROKER;
+
+    if ((rc = NetworkConnect(&network, address, MQTT_PORT)) != 0) {
+        printf("Return code from network connect is %d\n", rc);
+    }
+
+#if defined(MQTT_TASK)
+
+    if ((rc = MQTTStartTask(&client)) != pdPASS) {
+        printf("Return code from start tasks is %d\n", rc);
+    } else {
+        printf("Use MQTTStartTask\n");
+    }
+
+#endif
+
+    connectData.MQTTVersion = 3;
+    connectData.clientID.cstring = "ESP8266_sample";
+
+    if ((rc = MQTTConnect(&client, &connectData)) != 0) {
+        printf("Return code from MQTT connect is %d\n", rc);
+    } else {
+        printf("MQTT Connected\n");
+    }
+
+    if ((rc = MQTTSubscribe(&client, "ESP8266/sample/sub", 2, messageArrived)) != 0) {
+        printf("Return code from MQTT subscribe is %d\n", rc);
+    } else {
+        printf("MQTT subscribe to topic \"ESP8266/sample/sub\"\n");
+    }
+
+    while (++count) {
+        MQTTMessage message;
+        char payload[30];
+
+        message.qos = QOS2;
+        message.retained = 0;
+        message.payload = payload;
+        sprintf(payload, "message number %d", count);
+        message.payloadlen = strlen(payload);
+
+        if ((rc = MQTTPublish(&client, "ESP8266/sample/pub", &message)) != 0) {
+            printf("Return code from MQTT publish is %d\n", rc);
+        } else {
+            printf("MQTT publish topic \"ESP8266/sample/pub\", message number is %d\n", count);
+        }
+
+        vTaskDelay(1000 / portTICK_RATE_MS);  //send every 1 seconds
+    }
+
+    printf("mqtt_client_thread going to be deleted\n");
+    vTaskDelete(NULL);
+    return;
+}
+
+void user_conn_init(void)
+{
+    int ret;
+    ret = xTaskCreate(mqtt_client_thread,
+                      MQTT_CLIENT_THREAD_NAME,
+                      MQTT_CLIENT_THREAD_STACK_WORDS,
+                      NULL,
+                      MQTT_CLIENT_THREAD_PRIO,
+                      &mqttc_client_handle);
+
+    if (ret != pdPASS)  {
+        printf("mqtt create client thread %s failed\n", MQTT_CLIENT_THREAD_NAME);
+    }
+}

examples/protocols/mqtt/main/component.mk

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+#
+# "main" pseudo-component makefile.
+#
+# (Uses default behaviour of compiling all source files in directory, adding 'include' to include path.)
+

examples/protocols/mqtt/main/user_config.h

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+/*
+ * ESPRESSIF MIT License
+ *
+ * Copyright (c) 2017 <ESPRESSIF SYSTEMS (SHANGHAI) PTE LTD>
+ *
+ * Permission is hereby granted for use on ESPRESSIF SYSTEMS ESP8266 only, in which case,
+ * it is free of charge, to any person obtaining a copy of this software and associated
+ * documentation files (the "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the Software is furnished
+ * to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#ifndef __USER_CONFIG_H__
+#define __USER_CONFIG_H__
+
+#define SSID         "espressif"        /* Wi-Fi SSID */
+#define PASSWORD     "1234567890"     /* Wi-Fi Password */
+
+#define MQTT_BROKER  "iot.eclipse.org"  /* MQTT Broker Address*/
+#define MQTT_PORT    1883             /* MQTT Port*/
+
+#endif
+

examples/protocols/mqtt/main/user_main.c

@@ -0,0 +1,122 @@
+/*
+ * ESPRESSIF MIT License
+ *
+ * Copyright (c) 2015 <ESPRESSIF SYSTEMS (SHANGHAI) PTE LTD>
+ *
+ * Permission is hereby granted for use on ESPRESSIF SYSTEMS ESP8266 only, in which case,
+ * it is free of charge, to any person obtaining a copy of this software and associated
+ * documentation files (the "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the Software is furnished
+ * to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include "esp_common.h"
+#include "user_config.h"
+
+/******************************************************************************
+ * FunctionName : user_rf_cal_sector_set
+ * Description  : SDK just reversed 4 sectors, used for rf init data and paramters.
+ *                We add this function to force users to set rf cal sector, since
+ *                we don't know which sector is free in user's application.
+ *                sector map for last several sectors : ABCCC
+ *                A : rf cal
+ *                B : rf init data
+ *                C : sdk parameters
+ * Parameters   : none
+ * Returns      : rf cal sector
+*******************************************************************************/
+uint32 user_rf_cal_sector_set(void)
+{
+    flash_size_map size_map = system_get_flash_size_map();
+    uint32 rf_cal_sec = 0;
+
+    switch (size_map) {
+        case FLASH_SIZE_4M_MAP_256_256:
+            rf_cal_sec = 128 - 5;
+            break;
+
+        case FLASH_SIZE_8M_MAP_512_512:
+            rf_cal_sec = 256 - 5;
+            break;
+
+        case FLASH_SIZE_16M_MAP_512_512:
+        case FLASH_SIZE_16M_MAP_1024_1024:
+            rf_cal_sec = 512 - 5;
+            break;
+
+        case FLASH_SIZE_32M_MAP_512_512:
+        case FLASH_SIZE_32M_MAP_1024_1024:
+            rf_cal_sec = 1024 - 5;
+            break;
+        case FLASH_SIZE_64M_MAP_1024_1024:
+            rf_cal_sec = 2048 - 5;
+            break;
+        case FLASH_SIZE_128M_MAP_1024_1024:
+            rf_cal_sec = 4096 - 5;
+            break;
+        default:
+            rf_cal_sec = 0;
+            break;
+    }
+
+    return rf_cal_sec;
+}
+
+void wifi_event_handler_cb(System_Event_t *event)
+{
+    if (event == NULL) {
+        return;
+    }
+
+    switch (event->event_id) {
+        case EVENT_STAMODE_GOT_IP:
+            os_printf("sta got ip ,create task and free heap size is %d\n", system_get_free_heap_size());
+            user_conn_init();
+            break;
+
+        case EVENT_STAMODE_CONNECTED:
+            os_printf("sta connected\n");
+            break;
+
+        case EVENT_STAMODE_DISCONNECTED:
+            wifi_station_connect();
+            break;
+
+        default:
+            break;
+    }
+}
+
+/******************************************************************************
+ * FunctionName : user_init
+ * Description  : entry of user application, init user function here
+ * Parameters   : none
+ * Returns      : none
+*******************************************************************************/
+void user_init(void)
+{
+    os_printf("SDK version:%s %d\n", system_get_sdk_version(), system_get_free_heap_size());
+    wifi_set_opmode(STATION_MODE);
+
+    struct station_config config;
+    bzero(&config, sizeof(struct station_config));
+    sprintf(config.ssid, SSID);
+    sprintf(config.password, PASSWORD);
+    wifi_station_set_config(&config);
+
+    wifi_set_event_handler_cb(wifi_event_handler_cb); 
+
+    wifi_station_connect();
+}