UCOSIII软件定时器

API函数

//创建

void OSTmrCreate (OS_TMR *p_tmr,

                  CPU_CHAR *p_name,

                  OS_TICK dly,

                  OS_TICK period,

                  OS_OPT opt,

                  OS_TMR_CALLBACK_PTR p_callback,

                  void *p_callback_arg,

                  OS_ERR *p_err);

//删除

CPU_BOOLEAN OSTmrDel (OS_TMR *p_tmr,

                      OS_ERR *p_err);

//获取剩余时间

OS_TICK OSTmrRemainGet (OS_TMR *p_tmr,

                        OS_ERR *p_err);

//启动

CPU_BOOLEAN OSTmrStart (OS_TMR *p_tmr,

                        OS_ERR *p_err);

//获取当前定时器状态

OS_STATE OSTmrStateGet (OS_TMR *p_tmr,

                        OS_ERR *p_err);

//停止

CPU_BOOLEAN OSTmrStop (OS_TMR *p_tmr,

                       OS_OPT opt,

                       void *p_callback_arg,

                       OS_ERR *p_err);

举例

OSTmrCreate((OS_TMR     *)&tmr, //定时器

           (CPU_CHAR    *)"tmr",    //定时器名字

           (OS_TICK  )20,           //20*10=200ms

           (OS_TICK  )100,          //100*10=1000ms

           (OS_OPT       )OS_OPT_TMR_PERIODIC, //周期模式

           (OS_TMR_CALLBACK_PTR)tmr_callback,//定时器回调函数

           (void        *)0,            //参数为0

           (OS_ERR      *)&err);        //返回的错误码

//定时器的回调函数

void tmr_callback(void *p_tmr, void *p_arg)

{

    static u8 tmr_num=0;

    tmr_num++;      //定时器执行次数加1

    printf("定时器运行结束\r\n");

}

int main()

{

    OSTmrStart(&tmr, &err); //开启定时器

    OSTmrStop(&tmr, OS_OPT_TMR_NONE, 0, &err);  //关闭定时器

    return 0;

}

实验现象

巴特西

UCOSIII软件定时器

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