1.工程準備

由于要使用wifi功能，直接從wlan_demo復制一份出來，然后修改。
源文件只留下 main.c 就可以了。

BUILD.gn文件

import("//device/xradio/xr806/liteos_m/config.gni")static_library("app_mying") {configs = []sources = ["main.c",]cflags = board_cflagsinclude_dirs = board_include_dirsinclude_dirs += ["//kernel/liteos_m/kernel/arch/include","//utils/native/lite/include","//foundation/communication/wifi_lite/interfaces/wifiservice",] }

2. XR806 SDK

仔細看下xr806工程庫的結構， xr806的xr_skylark路徑下屬于芯片原生驅動庫！ 該路徑下面有各種功能參考示例，如trustzone、net、ping、json等。 因此，直接參考xr_skylark\include下的內容，來實現一些簡單的功能。

3.實現的功能

0）連接WiFi;

根據自己的SSID和PSK修改，代碼直接copy原來的。

1）ping服務器，進行聯通性測試;

ping一下自己的服務器，根據需要進行修改。include下面有ping/ping.h文件。很簡單的一個結構體(如下所示)，看情況就是給個地址，設置一下參數，然后就可以實現ping命令的功能了。 struct ping_data {ip_addr_t sin_addr; /* server addr */u32_t count; /* number of ping */u32_t data_long; /* the ping packet data long */u32_t interval; /* Wait interval seconds between sending each packet, default 1s */u32_t timeout; /* Time to wait for a response, in seconds */u32_t deadline; /* Specify a timeout, in seconds, ping thread will stop if timeout */u32_t ttl; /* ttl ping only. Set the IP Time to Live. */int run_flag; /* run flag, 0:stop 1:start */ };s32_t ping(struct ping_data *data);

2）作為TCP客戶端，連接server，發數據;

通過TCP連接服務器，發數據。 設置服務器信息 【地址】（比如：192.168.1.100） 【端口號】（比如5679）

net路徑下面有lwip庫，借此實現網絡通信功能。
代碼里，通過宏定義的方式，將lwip_xxx改成了與linux下的soket API一樣的接口。
參考正常的TCP_Client程序就行了。

3）讀取一下xr_skylark里的cjson版本信息。

發現有cjson庫，然后就隨便測試一下。

4.程序示例

#include <stdio.h> #include <string.h> #include <stdlib.h> #include "ohos_init.h" #include "driver/chip/hal_gpio.h" #include "kernel/os/os.h" #include "wifi_device.h" #include "cjson/cJSON.h" #include "net/ping/ping.h" #include "net/lwip-2.1.2/lwip/sockets.h" #include "net/lwip-2.1.2/lwip/tcp.h" #include "net/lwip-2.1.2/lwip/inet.h" #include "net/lwip-2.1.2/lwip/ip_addr.h"#define WIFI_DEVICE_CONNECT_AP_SSID "ChinaNet-111" #define WIFI_DEVICE_CONNECT_AP_PSK "111666111"#define GPIO_OUTPUT_PORT GPIO_PORT_Astatic OS_Thread_t g_main_thread;static void gpio_output_init(void) {GPIO_InitParam param;param.driving = GPIO_DRIVING_LEVEL_1;param.mode = GPIOx_Pn_F1_OUTPUT;param.pull = GPIO_PULL_NONE;HAL_GPIO_Init(GPIO_OUTPUT_PORT, GPIO_PIN_21, &param);//led燈對應IO }static void gpio_output_ctl(uint8_t level) {HAL_GPIO_WritePin(GPIO_OUTPUT_PORT, GPIO_PIN_21, level ? GPIO_PIN_HIGH : GPIO_PIN_LOW); }void wifi_connect(void) {const char ssid_want_connect[] = WIFI_DEVICE_CONNECT_AP_SSID;const char psk[] = WIFI_DEVICE_CONNECT_AP_PSK;printf("\n=========== Connect Test Start ===========\n");if (WIFI_SUCCESS != EnableWifi()) {printf("Error: EnableWifi fail.\n");return;}printf("EnableWifi Success.\n");if (WIFI_STA_ACTIVE == IsWifiActive())printf("Wifi is active.\n");OS_Sleep(1);if (WIFI_SUCCESS != Scan()) {printf("Error: Scan fail.\n");return;}printf("Wifi Scan Success.\n");OS_Sleep(1);WifiScanInfo scan_results[30];unsigned int scan_num = 30;if (WIFI_SUCCESS != GetScanInfoList(scan_results, &scan_num)) {printf("Error: GetScanInfoList fail.\n");return;}WifiDeviceConfig config = { 0 };int netId = 0;int i;for (i = 0; i < scan_num; i++) {if (0 == strcmp(scan_results[i].ssid, ssid_want_connect)) {memcpy(config.ssid, scan_results[i].ssid,WIFI_MAX_SSID_LEN);memcpy(config.bssid, scan_results[i].bssid,WIFI_MAC_LEN);strcpy(config.preSharedKey, psk);config.securityType = scan_results[i].securityType;config.wapiPskType = WIFI_PSK_TYPE_ASCII;config.freq = scan_results[i].frequency;break;}}if (i >= scan_num) {printf("Error: No found ssid in scan_results\n");return;}printf("GetScanInfoList Success.\n");if (WIFI_SUCCESS != AddDeviceConfig(&config, &netId)) {printf("Error: AddDeviceConfig Fail\n");return;}printf("AddDeviceConfig Success.\n");if (WIFI_SUCCESS != ConnectTo(netId)) {printf("Error: ConnectTo Fail\n");return;}printf("ConnectTo Success\n");OS_Sleep(3);WifiLinkedInfo get_linked_res;if (WIFI_SUCCESS != GetLinkedInfo(&get_linked_res)) {printf("Error: GetLinkedInfo Fail\n");return;}printf("GetLinkedInfo Success.\n");printf("ssid: %s\n", get_linked_res.ssid);printf("bssid: ");for (int j = 0; j < WIFI_MAC_LEN; j++) {printf("%02X", get_linked_res.bssid[j]);}printf("\n");printf("rssi: %d\n", get_linked_res.rssi);unsigned char get_mac_res[WIFI_MAC_LEN];if (WIFI_SUCCESS != GetDeviceMacAddress(get_mac_res)) {printf("Error: GetDeviceMacAddress Fail\n");return;}printf("GetDeviceMacAddress Success.\n");for (int j = 0; j < WIFI_MAC_LEN - 1; j++) {printf("%02X:", get_mac_res[j]);}printf("%02X\n", get_mac_res[WIFI_MAC_LEN - 1]); } struct ping_data ping_t; //ping命令參數設置 void ping_init() {ip_addr_t server_ip;inet_aton("129.204.63.27", &server_ip);ping_t.sin_addr = server_ip;ping_t.count = 0xF;ping_t.data_long = 512;ping_t.timeout = 30;ping_t.run_flag = 1; }//TCP SOCKET int s; void tcp_test_init() { //socket create!s = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);//address info!struct sockaddr_in server_addr;memset(&server_addr, 0, sizeof(server_addr));server_addr.sin_family = AF_INET;server_addr.sin_port = htons(5679);inet_pton(AF_INET, "192.168.1.100", &server_addr.sin_addr);//connect!if(connect(s,(void *)&server_addr,sizeof(server_addr)) < 0) {printf("connect tcp_server failed! \r\n");} else {printf("connect tcp_server successfuly! \r\n");} // send datasend(s, "xr806\n", 7, 0); } static void MainThread(void *arg) {gpio_output_init();wifi_connect();ping_init();ping(&ping_t);tcp_test_init();char buf[32];int cnt = 0;while(1) {sprintf(buf,"XR806:%s : %d \r\n",cJSON_Version(), cnt++);//向服務器發送數據send(s,buf, sizeof(buf), 0);printf("%s:Hello XR806 \r\n",__func__);gpio_output_ctl(1);OS_Sleep(1);gpio_output_ctl(0);OS_Sleep(1);} }void WifiTestMain(void) {printf("Wifi Test Start\r\n");if (OS_ThreadCreate(&g_main_thread, "MainThread", MainThread, NULL,OS_THREAD_PRIO_APP, 4 * 1024) != OS_OK) {printf("[ERR] Create MainThread Failed\n");} }SYS_RUN(WifiTestMain);

5.結果展示

通過網絡調試工具，建立TCP服務器，接收到了xr806發來的數據。

串口打印信息

[net INF] netif (IPv4) is up [net INF] address: 192.168.1.110 [net INF] gateway: 192.168.1.1 [net INF] netmask: 255.255.255.0 [net INF] msg <network IPv6 state> GetLinkedInfo Success. ssid: ChinaNet-111 bssid: 5475956E3374 rssi: 110 GetDeviceMacAddress Success. 9C:9E:49:BA:5B:01 PING 129.204.63.27 520 bytes of data. Request timeout for icmp_seq=1 512 bytes from 129.204.63.27: icmp_seq=2 time=43 ms 512 bytes from 129.204.63.27: icmp_seq=3 time=43 ms 512 bytes from 129.204.63.27: icmp_seq=4 time=44 ms 512 bytes from 129.204.63.27: icmp_seq=5 time=43 ms 512 bytes from 129.204.63.27: icmp_seq=6 time=45 ms 512 bytes from 129.204.63.27: icmp_seq=7 time=46 ms 512 bytes from 129.204.63.27: icmp_seq=8 time=44 ms 512 bytes from 129.204.63.27: icmp_seq=9 time=44 ms 512 bytes from 129.204.63.27: icmp_seq=10 time=44 ms 512 bytes from 129.204.63.27: icmp_seq=11 time=44 ms 512 bytes from 129.204.63.27: icmp_seq=12 time=44 ms 512 bytes from 129.204.63.27: icmp_seq=13 time=44 ms 512 bytes from 129.204.63.27: icmp_seq=14 time=44 ms 512 bytes from 129.204.63.27: icmp_seq=15 time=43 ms--- 129.204.63.27 ping statistics --- 15 packets transmitted, 14 received, 6% packet loss, time 672ms rtt min/avg/max/mdev = 43/43/46/3 ms connect tcp_server successfuly! MainThread:Hello XR806 MainThread:Hello XR806

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