MQX Software SolutionsのトピックRTCS recvfrom() not working on consistent lines

RTCS recvfrom() not working on consistent lines

ravindragurjar — Mon, 13 Jun 2016 14:04:59 GMT

Here is my code to send/receive data on UDP on a MQX task

uint32_t error = RTCS_create();

if (error != RTCS_OK)

{

printf("\nRTCS failed to initialize, error = %X", error);

_task_block();

}

ip_data.ip = ENET_IPADDR;

ip_data.mask = ENET_IPMASK;

ip_data.gateway = ENET_GATEWAY;

/* calcualte unique mac address from IP ADDRES */

ENET_get_mac_address (ENET_DEVICE, ENET_IPADDR, enet_address);

error = ipcfg_init_device (ENET_DEVICE, enet_address);

if (error != RTCS_OK)

{

printf("\nFailed to initialize ethernet device, error = %X", error);

_task_block();

}

error = ipcfg_bind_staticip (ENET_DEVICE, &ip_data);

sock_udp = socket(PF_INET, SOCK_DGRAM, 0);

local_addr.sin_family = AF_INET;

local_addr.sin_port = DEF_HARTIP_PORT;

local_addr.sin_addr.s_addr = INADDR_ANY;

bind(sock_udp, (sockaddr *)(&local_addr), sizeof(sockaddr_in));

while (1)

{

len_request = recvfrom(sock_udp, &msg_buffer[0], sizeof(hartmsg_buffer), 0, (struct sockaddr *) &local_addr,&remote_len);

...Process the received data * compose response

sendto(sock_udp, &hartmsg_buffer[0], tx_size, 0, (struct sockaddr *)&local_addr,sizeof(sockaddr_in));

}

When i hook up the UDP client, the communication works fine for few iterations. The recvfrom() dont process all the requests and 1 out 10 request dont generate response.

Am i missing something like a time delay or something?

Re: RTCS recvfrom() not working on consistent lines

danielchen — Tue, 14 Jun 2016 08:19:43 GMT

Hi Ravindra:

Which board you are using?

Regards

Daniel

Re: RTCS recvfrom() not working on consistent lines

ravindragurjar — Tue, 14 Jun 2016 08:30:13 GMT

K70F120M tower board.

My TCP/IP socket is working perfectly, issue is only with UDP socket.

Re: RTCS recvfrom() not working on consistent lines

danielchen — Wed, 15 Jun 2016 08:42:06 GMT

From your issue description, it seems a hardware issue. But your tcp socket is working perfectly. So I am not sure. Anyway, you can check your board jump settings first.

If this issue still exists, how much traffic you are using? only ping packets?

Regards

Daniel

Re: RTCS recvfrom() not working on consistent lines

ravindragurjar — Wed, 15 Jun 2016 10:49:30 GMT

My TWR-SER is Rev E. The Ethernet switch seems to be fine on board as TCP/IP is working fine.

I am using pretty less traffic with UDP client sending read request every 500mSec.

Re: RTCS recvfrom() not working on consistent lines

danielchen — Wed, 15 Jun 2016 12:29:02 GMT

Is your computer connected directly to your MCU? Because UDP is an unreliable transfer, maybe it will lose some packets especially in some complex networking environment.

Re: RTCS recvfrom() not working on consistent lines

ravindragurjar — Fri, 17 Jun 2016 09:34:28 GMT

Yes, its direct connection. When i run the ping command, i see no response to 1 out of 10 requests (times out).

One thing to mention is that i am running the code in Debug mode, not in release mode if that can possibly matter...

Re: RTCS recvfrom() not working on consistent lines

ravindragurjar — Tue, 21 Jun 2016 04:33:59 GMT

Turned out to be a jumper setting issue. After changing the J18 position I am able to see good behavior.

Thanks for your prompt support. :smileyhappy: