sntp（Simple Network Time Protocol）是一种网络时间协议，它是NTP（Network Time Protocol）的一个简化版本。
本项目是从LwIP中抽取的SNTP代码；
`Hi3861 SDK`中已经包含了一份预编译的lwip，但没有开启SNTP功能（静态库无法修改）；
需要保证模块连接的热点能够访问网络的。
修改网络参数
在Hi3861开发板上运行上述四个测试程序之前，需要根据你的无线路由、Linux系统IP修改 net_params.h文件的相关代码：
- PARAM_HOTSPOT_SSID 修改为你的热点名称
- PARAM_HOTSPOT_PSK 修改为你的热点密码；
可能需要修改校时服务器的ip地址，修改如下代码
void SntpSetServers(void)
{
IP4_ADDR(&g_ntpServerList[0], 223, 113, 97, 98); // cn.ntp.org.cn
IP4_ADDR(&g_ntpServerList[1], 114, 118, 7, 163); // ntp.ntsc.ac.cn
IP4_ADDR(&g_ntpServerList[2], 120, 25, 108, 11); // time.pool.aliyun.com
IP4_ADDR(&g_ntpServerList[3], 119, 28, 206, 193); // cn.pool.ntp.org
for (size_t i = 0; i < SNTP_SERVERS; i++) {
sntp_setserver(i, (ip_addr_t*)&g_ntpServerList[i]);
}
}方法就是用ping网址，通过返回的消息查看ip地址
代码编写
修改D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\BUILD.gn文件
# Copyright (c) 2023 Beijing HuaQing YuanJian Education Technology 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.
import("//build/lite/config/component/lite_component.gni")
lite_component("demo") {
features = [
#"base_00_helloworld:base_helloworld_example",
#"base_01_led:base_led_example",
#"base_02_loopkey:base_loopkey_example",
#"base_03_irqkey:base_irqkey_example",
#"base_04_adc:base_adc_example",
#"base_05_pwm:base_pwm_example",
#"base_06_ssd1306:base_ssd1306_example",
#"kernel_01_task:kernel_task_example",
#"kernel_02_timer:kernel_timer_example",
#"kernel_03_event:kernel_event_example",
#"kernel_04_mutex:kernel_mutex_example",
#"kernel_05_semaphore_as_mutex:kernel_semaphore_as_mutex_example",
#"kernel_06_semaphore_for_sync:kernel_semaphore_for_sync_example",
#"kernel_07_semaphore_for_count:kernel_semaphore_for_count_example",
#"kernel_08_message_queue:kernel_message_queue_example",
#"wifi_09_hotspot:wifi_hotspot_example",
#"wifi_10_sta:wifi_sta_example",
#"tcp_11_server:tcp_server_example",
#"tcp_12_client:tcp_client_example",
#"udp_13_server:udp_server_example",
#"udp_14_client:udp_client_example",
#"network_15_mqtt:network_mqtt_example",
"network_16_sntp:network_sntp_example",
]
}创建D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\network_16_sntp文件夹
文件夹中创建D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\network_16_sntp\BUILD.gn文件
# Copyright (c) 2020, HiHope Community.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
static_library("network_sntp_example") {
sources = [
"network_sntp_example.c",
"wifi_connecter.c",
"//third_party/sntp/src/sntp.c",
"//third_party/sntp/src/sntp_port.c",
"//third_party/sntp/src/sntp_debug.c"
]
defines = [
#"SNTP_SERVER_DNS=1",
"LWIP_HAVE_INT64=0",
"LWIP_DEBUG",
"SNTP_DEBUG=0xA0",
"LWIP_DBG_TYPES_ON=LWIP_DBG_ON"
]
include_dirs = [
"//third_party/sntp/include",
"//third_party/sntp/include/lwip/apps",
"//foundation/communication/wifi_lite/interfaces/wifiservice",
"//vendor/hisi/hi3861/hi3861/third_party/lwip_sack/include/",
]
}
文件夹中创建D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\network_16_sntp\wifi_connecter.h文件，该头文件包含wifi连接的宏。文件同tcp_12_client\wifi_connecter.h
额外添加如下宏定义
#ifndef PARAM_HOTSPOT_TYPE
#define PARAM_HOTSPOT_TYPE WIFI_SEC_TYPE_PSK /* defined in wifi_device_config.h */
#endif文件夹中创建D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\network_16_sntp\wifi_connecter.c文件，文件同tcp_12_client\wifi_connecter.c
文件夹中创建D:\DevEcoProjects\test\src\vendor\rtplay\rt_hi3861\demo\network_16_sntp\network_sntp_example.c文件
/*
* Copyright (c) 2020, HiHope Community.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include "ohos_init.h"
#include "cmsis_os2.h"
#include "sntp.h"
#include "wifi_connecter.h"
#include "lwip/pbuf.h"
#include "lwip/dns.h"
#include "lwip/ip4_addr.h"
#define SNTP_SERVERS 4
// #define ARRAY_SIZE(a) sizeof(a)/sizeof(a[0])
#define STACK_SIZE (4096)
#define DELAY_TICKS_500 (500)
static int g_netId = -1;
#if SNTP_SERVER_DNS
static const char* g_ntpServerList[] = {
// refers from https://dns.icoa.cn/ntp/#china
"cn.ntp.org.cn", // 中国 NTP 快速授时服务
"ntp.ntsc.ac.cn", // 国家授时中心 NTP 服务器
"time.pool.aliyun.com", // 阿里云公共 NTP 服务器
"cn.pool.ntp.org", // 国际 NTP 快速授时服务
};
// #define SNTP_SERVERS ARRAY_SIZE(g_ntpServerList)
void SntpSetServernames(void)
{
for (size_t i = 0; i < SNTP_SERVERS; i++) {
sntp_setservername(i, g_ntpServerList[i]);
}
}
#else
// ip4_addr_t g_ntpServerList[SNTP_MAX_SERVERS];
ip4_addr_t g_ntpServerList[SNTP_SERVERS];
void SntpSetServers(void)
{
IP4_ADDR(&g_ntpServerList[0], 223, 113, 97, 98); // cn.ntp.org.cn
IP4_ADDR(&g_ntpServerList[1], 114, 118, 7, 163); // ntp.ntsc.ac.cn
IP4_ADDR(&g_ntpServerList[2], 120, 25, 108, 11); // time.pool.aliyun.com
IP4_ADDR(&g_ntpServerList[3], 119, 28, 206, 193); // cn.pool.ntp.org
for (size_t i = 0; i < SNTP_SERVERS; i++) {
sntp_setserver(i, (ip_addr_t*)&g_ntpServerList[i]);
}
}
#endif
static void SntpTask(void)
{
WifiDeviceConfig config = {0};
// 准备AP的配置参数
// strcpy(config.ssid, PARAM_HOTSPOT_SSID);
// strcpy(config.preSharedKey, PARAM_HOTSPOT_PSK);
strcpy_s(config.ssid, WIFI_MAX_SSID_LEN, PARAM_HOTSPOT_SSID);
strcpy_s(config.preSharedKey, WIFI_MAX_KEY_LEN, PARAM_HOTSPOT_PSK);
config.securityType = PARAM_HOTSPOT_TYPE;
g_netId = ConnectToHotspot(&config);
printf("netId = %d\r\n", g_netId);
#if SNTP_SERVER_DNS
ip4_addr_t dnsServerAddr;
IP4_ADDR(&dnsServerAddr, 202, 98, 0, 68);
dns_setserver(0, (struct ip_addr *)&dnsServerAddr);
dns_init();
SntpSetServernames();
#else
SntpSetServers();
#endif
sntp_setoperatingmode(SNTP_OPMODE_POLL);
sntp_init();
printf("sntp_enabled: %d\r\n", sntp_enabled());
for (size_t i = 0; i < SNTP_SERVERS; i++) {
printf("sntp_getreachability(%zu): %d\r\n", i, sntp_getreachability(i));
}
osDelay(DELAY_TICKS_500);
for (size_t i = 0; i < SNTP_SERVERS; i++) {
printf("sntp_getreachability(%zu): %d\r\n", i, sntp_getreachability(i));
}
}
static void SntpEntry(void)
{
osThreadAttr_t attr = {0};
attr.name = "SntpTask";
attr.stack_size = STACK_SIZE;
attr.priority = osPriorityNormal;
if (osThreadNew(SntpTask, NULL, &attr) == NULL) {
printf("[SntpEntry] create SntpTask failed!\n");
}
}
SYS_RUN(SntpEntry);
使用build，编译成功后，使用upload进行烧录。
