# 编程实例
#### 实例描述
在下面的例子中，演示如下功能：
1. 软件定时器创建、启动、停止、删除操作。
2. 单次软件定时器，周期软件定时器使用方法。
 
#### 编程示例
前提条件：在menuconfig菜单中完成软件定时器的配置。
代码实现如下：
```
UINT32 g_timerCount1 = 0;
UINT32 g_timerCount2 = 0;
VOID Timer1_CallBack(UINT32 arg)
{
    UINT64 lastTick;
    g_timerCount1++;
    lastTick=(UINT32)LOS_TickCountGet();
    dprintf("g_timerCount1=%d\n", g_timerCount1);
    dprintf("tick_last1=%d\n", lastTick);
}
VOID Timer2_CallBack(UINT32 arg)
{
    UINT64 lastTick;
    lastTick=(UINT32)LOS_TickCountGet();
    g_timerCount2++;
    dprintf("g_timerCount2=%d\n", g_timerCount2);
    dprintf("tick_last2=%d\n", lastTick);
}
VOID Timer_example(VOID)
{
    UINT16 id1;     // Timer1 id
    UINT16 id2;     // Timer2 id
    UINT32 tick;
    LOS_SwtmrCreate(1000, LOS_SWTMR_MODE_ONCE, Timer1_CallBack, &id1, 1);
    LOS_SwtmrCreate(100, LOS_SWTMR_MODE_PERIOD, Timer2_CallBack, &id2, 1);
    dprintf("create Timer1 success\n");
    LOS_SwtmrStart(id1);
    dprintf("start Timer1 sucess\n");
    LOS_TaskDelay(200);
    LOS_SwtmrTimeGet(id1, &tick);
    dprintf("tick =%d\n", tick);
    LOS_SwtmrStop(id1);
    dprintf("stop Timer1 sucess\n");
    LOS_SwtmrStart(id1);
    LOS_TaskDelay(1000);
    LOS_SwtmrDelete(id1);
    dprintf("delete Timer1 sucess\n");
    LOS_SwtmrStart(id2);
    dprintf("start Timer2\n");
    LOS_TaskDelay(1000);
    LOS_SwtmrStop(id2);
    LOS_SwtmrDelete(id2); 
}
```
#### 结果验证
得到的结果为：
```
Create Timer1 success
start Timer1 sucess
tick =800
Stop Timer1 sucess
g_timerCount1=1201
tick_last1=1201
delete Timer1 success
Start Timer2
g_timerCount2=1
tick_last2=1301
g_timerCount2=2
tick_last2=1401
g_timerCount2=3
tick_last2=1501
g_timerCount2=4
tick_last2=1601
g_timerCount2=5
tick_last2=1701
g_timerCount2=6
tick_last2=1801
g_timerCount2=7
tick_last2=1901
g_timerCount2=8
tick_last2=2001
g_timerCount2=9
tick_last2=2101
g_timerCount2=10
tick_last2=2201
```
#### 完整实例代码
[sample_Timer.c](https://support.huaweicloud.com/kernelmanual-LiteOS/resource/sample_Timer.c)