CC3220MODA: sl_Connect issue

Matthew Williams80

Part Number: CC3220MODA

I am attempting a socket connection to a PC from the SimpleLink Module. Everything appears ok except the sl_Connect function. It hangs when I call it. if I trace the code in sl_socket.c the hanging statement is highlighted in the attached image. Either statement hangs whether it's blocking or non-blocking. If I comment out the highlighted code the connection establishes and the rest of the socket calls seem to work fine. What am I missing? It is lines 500/506 in sl_socket.c in case the screenshot is fuzzy.

Thanks,

over 4 years ago

0 Matthew Williams80 over 4 years ago

Prodigy 210 points

Also, Here is a snippet of code up until the point it hangs.

Addr.sin_family = SL_AF_INET;
Addr.sin_port = sl_Htons((uint16_t)10000);
Addr.sin_addr.s_addr = sl_Htonl((uint32_t)0xC0A80165);

sd = sl_Socket(SL_AF_INET, SL_SOCK_DGRAM, SL_IPPROTO_UDP);
status = sl_Connect(sd, ( SlSockAddr_t *)&Addr, sizeof(SlSockAddrIn_t));

0 Hnz over 4 years ago in reply to Matthew Williams80

Guru 39650 points

Hi,

UDP protocol is connectionless protocol from this reason usage of connect API with UDP not make sense. Connect API you should to use for TCP not for UDP.

Jan

0 Matthew Williams80 over 4 years ago in reply to Hnz

Prodigy 210 points

I replaced sl_Connect/sl_Send with sl_SendTo. That seems to work.

I would still be curious why the connect function work with the removal of the few lines I noted. I have used this method before w/o issues.

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CC3220MODA: sl_Connect issue