I can send messages and receive “ACK”
without error and I can enable the UDP output without error
but when I combine TCP and UDP my application will eventually
generate a hardware fault. Looking at the stack it seems to
be in the “plug_holes” function.
I am a first time user of LWIP. Any
assistance would be appreciated.
This is my main loop that outputs the UDP:
//
allocate
pbuf for UDP
p=pbuf_alloc(PBUF_TRANSPORT,
32, PBUF_RAM);
//
//
Loop forever, processing the LED blinking. All the work is
done in
//
interrupt handlers.
//
while(1)
{
//
get latest input
change = updateUdpPacket(udpOut);
/*
can't send UDP
untill TCP connected */
if
(clientIpAddr.addr
!= 0) {
//
send UPD if data delay expires or input changed state
if
(change || g_100usTick == 0) {
//
only output UDP if data delay is enabled (-1 is disabled)
if
(data_stream_delay_ms >= 0) {
if
(p) {
//
Toggle the red LED.
MAP_GPIOPinWrite(GPIO_PORTP_BASE, GPIO_PIN_5,
(MAP_GPIOPinRead(GPIO_PORTP_BASE, GPIO_PIN_5) ^
GPIO_PIN_5));
sprintf(p->payload,
"%s
%04X %s\n",
VM.PodId,
g_usSeq, udpOut);
//
increment the UDP number
g_usSeq++;
//
send the UDP message
udp_sendto(UDPpcb,
p, &clientIpAddr, UDP_PORT);
}
}
//
reset the data delay counter
VM.DataStreamDelay =
data_stream_delay_ms; //
convert to float
g_100usTick = VM.DataStreamDelay
/ 0.1; //
set data delay counter to 100us ticks
}
}
}