【开发板试用报告】HarmonyOS之HelloWorld,WIFI连接,Socket tcp 精华

      开发环境都准备就绪以后，就迫不及待的想来一个入门篇-HelloWorld,

• • HelloWorld  1.首先在..\applications\sample\wifi-iot\app目录下创建my_first_app目录 2 创建hello_world.c文件 并写入代.3 创建BUILD.gn文件 4 进入代码根目录python build.py wifiiot 编译 5 使用VS_Code中的的插件DevEco Device Tool就行烧录

static_library("myapp") {
    sources = [
        "hello_world.c"
    ]
    include_dirs = [
        "//utils/native/lite/include"
    ]
}

#include <stdio.h>
#include "ohos_init.h"
#include "ohos_types.h"
 
void HelloWorld(void)
{
    printf("[xm] Hello world.\n");
}
SYS_RUN(HelloWorld);​

• •  WIFI连接及Socket tcp测试 1 首先在..\applications\sample\wifi-iot\app目录下创建sta_demo目录 2 编写代码 3 创建BUILD.gn文件 4 编译 5烧录（注意如果想多个功能一起使用，必须在app下的BUILD.gn中进行配置）

    #include <stdio.h>
    
    #include <unistd.h>
    
    #include "ohos_init.h"
    #include "cmsis_os2.h"
    
    #include <unistd.h>
    #include "hi_wifi_api.h"
    //#include "wifi_sta.h"
    #include "lwip/ip_addr.h"
    #include "lwip/netifapi.h"
    
    static struct netif *g_lwip_netif = NULL;
    
    /* clear netif's ip, gateway and netmask */
    void hi_sta_reset_addr(struct netif *pst_lwip_netif)
    {
        ip4_addr_t st_gw;
        ip4_addr_t st_ipaddr;
        ip4_addr_t st_netmask;
        printf("%s %d \r\n", __FILE__, __LINE__);
        if (pst_lwip_netif == NULL)
        {
            printf("hisi_reset_addr::Null param of netdev\r\n");
            return;
        }
    
        IP4_ADDR(&st_gw, 0, 0, 0, 0);
        IP4_ADDR(&st_ipaddr, 0, 0, 0, 0);
        IP4_ADDR(&st_netmask, 0, 0, 0, 0);
    
        netifapi_netif_set_addr(pst_lwip_netif, &st_ipaddr, &st_netmask, &st_gw);
    }
    
    void wifi_wpa_event_cb(const hi_wifi_event *hisi_event)
    {
        if (hisi_event == NULL)
            return;
    
        switch (hisi_event->event)
        {
        case HI_WIFI_EVT_SCAN_DONE:
            printf("WiFi: Scan results available\n");
            break;
        case HI_WIFI_EVT_CONNECTED:
            printf("WiFi: Connected\n");
            netifapi_dhcp_start(g_lwip_netif);
            break;
        case HI_WIFI_EVT_DISCONNECTED:
            printf("WiFi: Disconnected\n");
            netifapi_dhcp_stop(g_lwip_netif);
            hi_sta_reset_addr(g_lwip_netif);
            break;
        case HI_WIFI_EVT_WPS_TIMEOUT:
            printf("WiFi: wps is timeout\n");
            break;
        default:
            break;
        }
    }
    
    int hi_wifi_start_connect(void)
    {
        int ret;
        errno_t rc;
        hi_wifi_assoc_request assoc_req = {0};
    
        /* copy SSID to assoc_req */
        //热点名称
        rc = memcpy_s(assoc_req.ssid, HI_WIFI_MAX_SSID_LEN + 1, "CU_K22k", 7); /* 9:ssid length */
        if (rc != EOK)
        {
            printf("%s %d \r\n", __FILE__, __LINE__);
            return -1;
        }
    
        /*
         * OPEN mode
         * for WPA2-PSK mode:
         * set assoc_req.auth as HI_WIFI_SECURITY_WPA2PSK,
         * then memcpy(assoc_req.key, "12345678", 8).
         */
        //热点加密方式
        assoc_req.auth = HI_WIFI_SECURITY_WPA2PSK;
    
        /* 热点密码 */
        memcpy(assoc_req.key, "tkhbx8ec", 8);
    
        ret = hi_wifi_sta_connect(&assoc_req);
        if (ret != HISI_OK)
        {
            printf("%s %d \r\n", __FILE__, __LINE__);
            return -1;
        }
        printf("%s %d \r\n", __FILE__, __LINE__);
        hi_wifi_sta_get_ap_rssi
        return 0;
    }
    
    void sta_demo(void)
    {
        int ret;
        char ifname[WIFI_IFNAME_MAX_SIZE + 1] = {0};
        int len = sizeof(ifname);
        unsigned int num = WIFI_SCAN_AP_LIMIT;
    
        ret = hi_wifi_sta_start(ifname, &len);
        if (ret != HISI_OK)
        {
            printf("%s %d \r\n", __FILE__, __LINE__);
            return;
        }
    
        /* register call back function to receive wifi event, etc scan results event,
         * connected event, disconnected event.
         */
        ret = hi_wifi_register_event_callback(wifi_wpa_event_cb);
        if (ret != HISI_OK)
        {
            printf("register wifi event callback failed\n");
        }
    
        /* acquire netif for IP operation */
        g_lwip_netif = netifapi_netif_find(ifname);
        if (g_lwip_netif == NULL)
        {
            printf("%s: get netif failed\n", __FUNCTION__);
            return;
        }
    
        /* start scan, scan results event will be received soon */
        ret = hi_wifi_sta_scan();
        if (ret != HISI_OK)
        {
            printf("%s %d \r\n", __FILE__, __LINE__);
            return;
        }
    
        sleep(5); /* sleep 5s, waiting for scan result. */
    
        hi_wifi_ap_info *pst_results = malloc(sizeof(hi_wifi_ap_info) * WIFI_SCAN_AP_LIMIT);
        if (pst_results == NULL)
        {
            printf("%s %d \r\n", __FILE__, __LINE__);
            return;
        }
    
        ret = hi_wifi_sta_scan_results(pst_results, &num);
        if (ret != HISI_OK)
        {
            printf("%s %d \r\n", __FILE__, __LINE__);
            free(pst_results);
            return;
        }
    
        for (unsigned int loop = 0; (loop < num) && (loop < WIFI_SCAN_AP_LIMIT); loop++)
        {
            printf("SSID: %s\n", pst_results[loop].ssid);
        }
        free(pst_results);
    
        /* if received scan results, select one SSID to connect */
        ret = hi_wifi_start_connect();
        if (ret != 0)
        {
            printf("%s %d \r\n", __FILE__, __LINE__);
            return;
        }
    
        return;
    }
    #include "lwip/sockets.h"
    #define SERVER_PORT_TCP 8888
    #define TCP_BACKLOG 10
    int sock_fd, new_fd;
    char recvbuf[512];
    char *buf = "hello I'm Server Your ?";
    
    int tcp_demo(void)
    {
    
        //自己的地址信息
        struct sockaddr_in my_addr;
        //连接者的地址信息
        struct sockaddr_in their_addr;
        int sin_size;
        struct sockaddr_in *cli_addr;
    
        /* 创建socket */
        if ((sock_fd = socket(AF_INET, SOCK_STREAM,0)) == -1)
        {
            printf("%s %d \r\n", __FILE__, __LINE__);
            perror("socket is error \r\n");
            exit(1);
        }
        /*主机字节顺序*/
        /*协议*/
        my_addr.sin_family = AF_INET;
        my_addr.sin_port = htons(8888);
        /*当前ip地址写入*/
        my_addr.sin_addr.s_addr = INADDR_ANY;
    
        /*将结构体其余的都清零*/
        bzero(&(my_addr.sin_zero), 8);
    
        printf("%s %d \r\n", __FILE__, __LINE__);
    
        if (bind(sock_fd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == -1)
        {
            printf("%s %d \r\n", __FILE__, __LINE__);
            perror("bind is error \r\n");
            exit(1);
        }
        /*开始监听*/
        if (listen(sock_fd, TCP_BACKLOG) == -1)
        {
            perror("listen is error \r\n");
            exit(1);
        }
        printf("%s %d \r\n", __FILE__, __LINE__);
        printf("START ACCEPT -----------");
    
        while (1)
        {
            sin_size = sizeof(struct sockaddr_in);
            printf("%s %d \r\n", __FILE__, __LINE__);
            if ((new_fd = accept(sock_fd, (struct sockaddr *)&their_addr, (socklen_t *)&sin_size)) == -1)
            {
                perror("accept");
                continue;
            }
            cli_addr = malloc(sizeof(struct sockaddr));
    
            printf("accept addr \r\n");
            if (cli_addr != NULL)
            {
                memcpy(cli_addr, &their_addr, sizeof(struct sockaddr));
            }
            //处理目标
            ssize_t ret;
    
            while (1)
            {
                printf("%s %d \r\n", __FILE__, __LINE__);
                if ((ret = recv(new_fd, recvbuf, sizeof(recvbuf), 0)) == -1)
                {
                    printf("recv error \r\n");
                    return -1;
                }
                printf("recv: \r\n");
                printf("%s", recvbuf);
                printf(" \r\n");
                sleep(2);
                if ((ret = send(new_fd, buf, strlen(buf) + 1, 0)) == -1)
                {
                    perror("send :error");
                }
                sleep(2);
            }
            close(new_fd);
            return 0;
        }
    }
    
    void tcp_entry(void)
    {
    
        sta_demo();
        tcp_demo();
    }
    
    SYS_RUN(tcp_entry);
    ​

    # Copyright (c) 2020 Huawei Device Co., Ltd.
    # Licensed under the Apache License, Version 2.0 (the "License");
    # you may not use this file except in compliance with the License.
    # You may obtain a copy of the License at
    #
    #     http://www.apache.org/licenses/LICENSE-2.0
    #
    # Unless required by applicable law or agreed to in writing, software
    # distributed under the License is distributed on an "AS IS" BASIS,
    # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    # See the License for the specific language governing permissions and
    # limitations under the License.
    
    static_library("sta_demo") {
        sources = [
            "sta_demo.c"
        ]
    
        include_dirs = [
            "//utils/native/lite/include",
            "//kernel/liteos_m/components/cmsis/2.0",
            "//base/iot_hardware/interfaces/kits/wifiiot_lite",
            "//vendor/hisi/hi3861/hi3861/third_party/lwip_sack/include",
            "//foundation/communication/interfaces/kits/wifi_lite/wifiservice",
            
        ]
    }
    

    

  • 运行结果