WiFi-IoT 鸿蒙开发套件样例开发原创

润和软件HiHope

发布于 2022-6-24 15:29

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HiSpark WiFi-IoT鸿蒙开发套件首发于HDC 2020，是首批支持HarmonyOS 2.0的开发套件，亦是鸿蒙官方推荐套件，由润和软件HiHope量身打造，已在鸿蒙社区和广大鸿蒙开发者中得到广泛应用。

WiFi-IoT 鸿蒙开发套件样例开发-鸿蒙开发者社区

一、Thread API
WiFi-IoT 鸿蒙开发套件样例开发-鸿蒙开发者社区
osThreadNew()

osThreadId_t osThreadNew(osThreadFunc_t	func, void *argument,const osThreadAttr_t *attr )	
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注意 :不能在中断服务调用该函数
参数
WiFi-IoT 鸿蒙开发套件样例开发-鸿蒙开发者社区
osThreadTerminate()

osStatus_t osThreadTerminate (osThreadId_t thread_id)
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WiFi-IoT 鸿蒙开发套件样例开发-鸿蒙开发者社区

二、代码分析
创建线程，创建成功则打印线程名字和线程ID

osThreadId_t newThread(char *name, osThreadFunc_t func, void *arg) {
    osThreadAttr_t attr = {
        name, 0, NULL, 0, NULL, 1024*2, osPriorityNormal, 0, 0
    };
    osThreadId_t tid = osThreadNew(func, arg, &attr);
    if (tid == NULL) {
        printf("osThreadNew(%s) failed.\r\n", name);
    } else {
        printf("osThreadNew(%s) success, thread id: %d.\r\n", name, tid);
    }
    return tid;
}
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该函数首先会打印自己的参数，然后对全局变量count进行循环+1操作，之后会打印count的值

void threadTest(void *arg) {
    static int count = 0;
    printf("%s\r\n",(char *)arg);
    osThreadId_t tid = osThreadGetId();
    printf("threadTest osThreadGetId, thread id:%p\r\n", tid);
    while (1) {
        count++;
        printf("threadTest, count: %d.\r\n", count);
        osDelay(20);
    }
}
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主程序rtosv2_thread_main创建线程并运行，并使用上述API进行相关操作，最后终止所创建的线程。

void rtosv2_thread_main(void *arg) {
    (void)arg;
    osThreadId_t tid=newThread("test_thread", threadTest, "This is a test thread.");

    const char *t_name = osThreadGetName(tid);
    printf("[Thread Test]osThreadGetName, thread name: %s.\r\n", t_name);

    osThreadState_t state = osThreadGetState(tid);
    printf("[Thread Test]osThreadGetState, state :%d.\r\n", state);

    osStatus_t status = osThreadSetPriority(tid, osPriorityNormal4);
    printf("[Thread Test]osThreadSetPriority, status: %d.\r\n", status);

    osPriority_t pri = osThreadGetPriority (tid);   
    printf("[Thread Test]osThreadGetPriority, priority: %d.\r\n", pri);

    status = osThreadSuspend(tid);
    printf("[Thread Test]osThreadSuspend, status: %d.\r\n", status);  

    status = osThreadResume(tid);
    printf("[Thread Test]osThreadResume, status: %d.\r\n", status);

    uint32_t stacksize = osThreadGetStackSize(tid);
    printf("[Thread Test]osThreadGetStackSize, stacksize: %d.\r\n", stacksize);

    uint32_t stackspace = osThreadGetStackSpace(tid);
    printf("[Thread Test]osThreadGetStackSpace, stackspace: %d.\r\n", stackspace);

    uint32_t t_count = osThreadGetCount();
    printf("[Thread Test]osThreadGetCount, count: %d.\r\n", t_count);  

    osDelay(100);
    status = osThreadTerminate(tid);
    printf("[Thread Test]osThreadTerminate, status: %d.\r\n", status);
}
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三、如何编译
将此目录下的 thread.c 和 BUILD.gn 复制到openharmony源码的applications\sample\wifi-iot\app\iothardware目录下，
修改openharmony源码的applications\sample\wifi-iot\app\BUILD.gn文件，将其中的 features 改为：

    features = [
        "iothardware:thread_demo",
    ]
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3.在openharmony源码顶层目录执行：python build.py wifiiot
四、运行结果

[Thread Test] osThreadNew(test_thread) success.
[Thread Test] osThreadGetName, thread name: test_thread.
[Thread Test] osThreadGetState, state :1.
[Thread Test] This is a test thread.  <-testThread log
[Thread Test] threadTest osThreadGetId, thread id:0xe8544
[Thread Test] threadTest, count: 1.   <-testThread log
[Thread Test] osThreadSetPriority, status: 0.
[Thread Test] osThreadGetPriority, priority: 28.
[Thread Test] osThreadSuspend, status: 0.
[Thread Test] osThreadResume, status: 0.
[Thread Test] osThreadGetStackSize, stacksize: 2048.
[Thread Test] osThreadGetStackSpace, stackspace: 1144.
[Thread Test] osThreadGetCount, count: 12.
[Thread Test] threadTest, count: 2.   <-testThread log
[Thread Test] threadTest, count: 3.   <-testThread log
[Thread Test] threadTest, count: 4.   <-testThread log
[Thread Test] threadTest, count: 5.   <-testThread log
[Thread Test] threadTest, count: 6.   <-testThread log
[Thread Test] osThreadTerminate, status: 0.
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