Dear all,
I have a little problem to work with a TCP- and UDP connection at the same
time.
There are no problems when I establish the TCP connection or the UDP
connection separately. Only if I would use a UDP connection simultaneously
with one TCP link, I could not receive all UDP frames on my client
application. But if I close the TCP now- the UDP connection works very well
again.
Ok- I thought: a resource problem. But I don't have any buffer or
udp_send() errors.
Furthermore another point I don't understand: If I open a second TCP
connection on another PC- all connections will work very well!! (2*TCP +
*UDP)
Anyone an idea???
I use lwip 1.3.0 (ported for a LM3s89xx MCU with FreeRTOS running)
Following code sequence I use in my "UDP Thread" which will be woken every
10ms:
/*******************************************************/
// allocate packet buffer
p = pbuf_alloc(PBUF_TRANSPORT, (1024 + 5) * sizeof(int), PBUF_RAM);
if(p==NULL) {
// set error...
break;
}
//
// write data to p->payload here
// ...
// send the frame
err =udp_send (udp, p);
if(err != ERR_OK){
// set error...
}
// De-allocate packet buffer
If(p)
pbuf_free(p);
/*******************************************************/
Thank you!!
Felix
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