UCOSII软件定时器

API函数

//创建
OS_TMR *OSTmrCreate (INT32U dly,
                     INT32U period,
                     INT8U opt,
                     OS_TMR_CALLBACK callback,
                     void *callback_arg,
                     INT8U *pname,
                     INT8U *perr);

//删除
BOOLEAN OSTmrDel (OS_TMR *ptmr,
                  INT8U *perr);

//定时器名字
INT8U OSTmrNameGet (OS_TMR *ptmr,
                    INT8U **pdest,
                    INT8U *perr);

//溢出时间
INT32U OSTmrRemainGet (OS_TMR *ptmr,
                       INT8U *perr);

//定时器状态
INT8U OSTmrStateGet (OS_TMR *ptmr,
                     INT8U *perr);

//启动
BOOLEAN OSTmrStart (OS_TMR *ptmr,
                    INT8U *perr);

//关闭
BOOLEAN OSTmrStop (OS_TMR *ptmr,
                   INT8U opt,
                   void *callback_arg,
                   INT8U *perr);

//发送信号
INT8U OSTmrSignal (void);

应用举例

OS_TMR *tmr;

void start_task(void *pdata)
{
    OS_ENTER_CRITICAL();

    tmr = OSTmrCreate ((INT32U )0,
                        (INT32U  )50, //50*100ms
                        (INT8U   )OS_TMR_OPT_PERIODIC,
                        (OS_TMR_CALLBACK)tmr_callback,
                        (void   *)0,
                        (INT8U  *)"tmr",
                        (INT8U  *)&err);

    OS_EXIT_CRITICAL();

    OSTmrStart(msg->tmr, &err);
}

void tmr_callback(void *ptmr, void *parg)
{
    INT32U remain;

    remain = OSTmrRemainGet(ptmr, &err);
    if(remain <= 5)
    {
        printf("tmr_callback OSTmrRemainGet remain err: %d
", remain);
        return;
    }
}