UDP TIVA LWIP

Hello Krishnan,

We do not have a ready to use UDP example. However forum search in Stellaris ARM Forum would lead you to a lot of the UDP posts. Example post which has a reference to the possible UDP code.

https://e2e.ti.com/support/microcontrollers/stellaris_arm/int-stellaris_arm/f/176/t/23019.aspx

Regards

Amit

Hello Krishnan G Nair ,

Have you ever found a simple example for UDP?

Hello Uilter

There is a UDP example in TI-RTOS for TM4C129. Please see the following post

e2e.ti.com/.../422233

Regards
Amit

Thanks Amit, but I need a simple example without RTOS.
Let me know with you have.

Just for your information.
You can find some samples using Lwip from TivaWare. For example, inet_io -- This sample is using Lwip (UDP) with http server. If you just want to loop back the packets, just remove http server related code, and modify Lwip related code (locator.c). The following modifications may work:

#ifdef UDP_ECHO
udp_recv(pcb, LocatorReceive_echo, NULL);
#else
udp_recv(pcb, LocatorReceive, NULL);
#endif

where,
void LocatorReceive_echo(void *arg, struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *addr, u16_t port)
{
if (p != NULL) {
/* send received packet back to sender */
udp_sendto(pcb, p, addr, port);
/* free the pbuf */
pbuf_free(p);
}
}

Good luck.
Naoki

Hello,

Right now i am in native ,i will be back on tuesday,i will replay you then regarding udp.

For time being ,in TM4C is supported by lwip stack(refer enetio/enet lwip) examples.

Its using http,thre you have to code udp program.

its simple

first do lwip initialization,try static ip.

create a udp

bind it

send it to broadcast ip.

try it,

Rregards,

Krishnan