RTCS_time_get?

gaozida — Wed, 30 Mar 2016 03:12:20 GMT

The returned value of RTCS_time_get small than the real time， why? thanks.

Re: RTCS_time_get?

danielchen — Wed, 30 Mar 2016 08:00:38 GMT

Could you please elaborate more on this?

Basic MQX timing is based on ticks. Default value of tick time is 5ms

Regards

Daniel

gaozida — Wed, 30 Mar 2016 09:03:52 GMT

Hi Daniel

Very grateful to reply in a timely manner.

The code in the tcpip.c (MQX version 3.8)

while (1)
{
tcpip_msg = (TCPIP_MESSAGE_PTR)RTCS_msgq_receive(tcpip_qid, timeout, RTCS_data_ptr->TCPIP_msg_pool);
if (tcpip_msg)
{
timebefore = RTCS_time_get();
if (NULL != tcpip_msg->COMMAND)
{
tcpip_msg->COMMAND(tcpip_msg->DATA);
}
RTCS_msg_free(tcpip_msg);
}
timeout = TCP_tick();
timeafter = RTCS_time_get();
timedelta = RTCS_timer_get_interval(timebefore, timeafter);
timedelta = TCPIP_Event_time(timedelta);
if (timedelta != 0)
{
if ((timedelta < timeout) || (timeout == 0))
{
timeout = timedelta;
timebefore = timeafter;
}
}
}

The exception is that net will be abnormal. arp frame can not send successfully when the cpu power on before cable disconnection state.

The code is rewritten in MQX version 4.2:

while (1)
{
tcpip_msg = (TCPIP_MESSAGE_PTR)RTCS_msgq_receive(tcpip_qid, timeout, RTCS_data_ptr->TCPIP_msg_pool);
if (tcpip_msg)
{
//timebefore = RTCS_time_get();
if (NULL != tcpip_msg->COMMAND)
{
tcpip_msg->COMMAND(tcpip_msg->DATA);
}
RTCS_msg_free(tcpip_msg);
}
timeout = TCP_tick();
timeafter = RTCS_time_get();
timedelta = RTCS_timer_get_interval(timebefore, timeafter);
timedelta = TCPIP_Event_time(timedelta);
timebefore = timeafter;
if (timedelta != 0)
{
if ((timedelta < timeout) || (timeout == 0))
{
timeout = timedelta;
//timebefore = timeafter;
}
}
}

Retest , the exception disappear.

I made a mistake, I thought it was a RTCS_time_get return value error. Thus lead to not call the arp retransmission.

Regards

gaozida.