https://harmonyos.51cto.com/#zz
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
https://harmonyos.51cto.com/#zz