OpenHarmony设备开发 小型系统内核(LiteOS-A) 基础内核

VOID Example_TransformTime(VOID)
{
    UINT32 uwMs;
    UINT32 uwTick;
    uwTick = LOS_MS2Tick(10000); //10000 ms数转换为Tick数
    PRINTK("uwTick = %d \n",uwTick);
    uwMs= LOS_Tick2MS(100); //100 Tick数转换为ms数
    PRINTK("uwMs = %d \n",uwMs);
}

VOID Example_GetTime(VOID)
{
    UINT32 uwcyclePerTick;
    UINT64 uwTickCount;

    uwcyclePerTick = LOS_CyclePerTickGet(); //每个Tick多少Cycle数
    if(0 != uwcyclePerTick)
    {
        PRINTK("LOS_CyclePerTickGet = %d \n", uwcyclePerTick);
    }

    uwTickCount = LOS_TickCountGet(); //获取Tick数
    if(0 != uwTickCount)
    {
        PRINTK("LOS_TickCountGet = %d \n", (UINT32)uwTickCount);
    }
    LOS_TaskDelay(200);//延迟200 Tick
    uwTickCount = LOS_TickCountGet();
    if(0 != uwTickCount)
    {
        PRINTK("LOS_TickCountGet after delay = %d \n", (UINT32)uwTickCount);
    }
}

uwTick = 10000 
uwMs = 100

LOS_CyclePerTickGet = 49500 
LOS_TickCountGet = 347931
LOS_TickCountGet after delay = 348134

#include "los_swtmr.h"

void Timer1_Callback(uint32_t arg);
void Timer2_Callback(uint32_t arg);

UINT32 g_timercount1 = 0;
UINT32 g_timercount2 = 0;

void Timer1_Callback(uint32_t arg) // 回调函数1
{
    unsigned long tick_last1;
    g_timercount1++;
    tick_last1=(UINT32)LOS_TickCountGet(); // 获取当前Tick数
    PRINTK("g_timercount1=%d\n",g_timercount1);
    PRINTK("tick_last1=%d\n",tick_last1);
}

void Timer2_Callback(uint32_t arg) // 回调函数2
{
    unsigned long tick_last2;
    tick_last2=(UINT32)LOS_TickCountGet();
    g_timercount2 ++;
    PRINTK("g_timercount2=%d\n",g_timercount2);
    PRINTK("tick_last2=%d\n",tick_last2);
}

void Timer_example(void)
{
    UINT16 id1;
    UINT16 id2; // timer id
    UINT32 uwTick;

    /* 创建单次软件定时器，Tick数为1000，启动到1000Tick数时执行回调函数1 */
    LOS_SwtmrCreate (1000, LOS_SWTMR_MODE_ONCE, Timer1_Callback, &id1, 1);
    
    /* 创建周期性软件定时器，每100Tick数执行回调函数2 */
    LOS_SwtmrCreate(100, LOS_SWTMR_MODE_PERIOD, Timer2_Callback, &id2, 1);
    PRINTK("create Timer1 success\n");

    LOS_SwtmrStart (id1); //启动单次软件定时器
    dprintf("start Timer1 success\n");
    LOS_TaskDelay(200); // 延时200Tick数
    LOS_SwtmrTimeGet(id1, &uwTick); // 获得单次软件定时器剩余Tick数
    PRINTK("uwTick =%d\n", uwTick);

    LOS_SwtmrStop(id1); // 停止软件定时器
    PRINTK("stop Timer1 success\n");

    LOS_SwtmrStart(id1);
    LOS_TaskDelay(1000);
    LOS_SwtmrDelete(id1); // 删除软件定时器
    PRINTK("delete Timer1 success\n");

    LOS_SwtmrStart(id2); // 启动周期性软件定时器
    PRINTK("start Timer2\n");

    LOS_TaskDelay(1000);
    LOS_SwtmrStop(id2);
    LOS_SwtmrDelete(id2);
}

create Timer1 success
start Timer1 success
uwTick =800
stop Timer1 success
g_timercount1=1
tick_last1=1201
delete Timer1 success
start Timer2
g_timercount2 =1
tick_last1=1301
g_timercount2 =2
tick_last1=1401
g_timercount2 =3
tick_last1=1501
g_timercount2 =4
tick_last1=1601
g_timercount2 =5
tick_last1=1701
g_timercount2 =6
tick_last1=1801
g_timercount2 =7
tick_last1=1901
g_timercount2 =8
tick_last1=2001
g_timercount2 =9
tick_last1=2101
g_timercount2 =10
tick_last1=2201

#include "los_hwi.h"
#include "los_atomic.h"
#include "los_task.h"

UINT32 g_testTaskId01;
UINT32 g_testTaskId02;
Atomic g_sum;
Atomic g_count;

UINT32 Example_Atomic01(VOID)
{
    int i = 0;
    for(i = 0; i < 100; ++i) {
        LOS_AtomicInc(&g_sum);
    }

    LOS_AtomicInc(&g_count);
    return LOS_OK;
}

UINT32 Example_Atomic02(VOID)
{
    int i = 0;
    for(i = 0; i < 100; ++i) {
        LOS_AtomicDec(&g_sum);
    }

    LOS_AtomicInc(&g_count);
    return LOS_OK;
}

UINT32 Example_AtomicTaskEntry(VOID)
{
    TSK_INIT_PARAM_S stTask1={0};
    stTask1.pfnTaskEntry = (TSK_ENTRY_FUNC)Example_Atomic01;
    stTask1.pcName       = "TestAtomicTsk1";
    stTask1.uwStackSize  = LOSCFG_BASE_CORE_TSK_DEFAULT_STACK_SIZE;
    stTask1.usTaskPrio   = 4;
    stTask1.uwResved     = LOS_TASK_STATUS_DETACHED;

    TSK_INIT_PARAM_S stTask2={0};
    stTask2.pfnTaskEntry = (TSK_ENTRY_FUNC)Example_Atomic02;
    stTask2.pcName       = "TestAtomicTsk2";
    stTask2.uwStackSize  = LOSCFG_BASE_CORE_TSK_DEFAULT_STACK_SIZE;
    stTask2.usTaskPrio   = 4;
    stTask2.uwResved     = LOS_TASK_STATUS_DETACHED;

    LOS_TaskLock();
    LOS_TaskCreate(&g_testTaskId01, &stTask1);
    LOS_TaskCreate(&g_testTaskId02, &stTask2);
    LOS_TaskUnlock();

    while(LOS_AtomicRead(&g_count) != 2);
    PRINTK("g_sum = %d\n", g_sum);

    return LOS_OK;
}

g_sum = 0