How to read the contents of the UDP packet?

I have my PC connected to the FPGA board. The board is constantly sending me UDP packets with some random data. I am using this code to get packets and read them:

u = udp ('10.51.32.251', 8998, 'LocalPort', 20004);
fopen(u)
%check if the connection is open and data is received
get (u, 'Status')
get (u, 'ValuesReceived')
A = fread(u);
fclose(u)
delete (u);
clear u

All I get is error message: "Warning: Unsuccessful read: The specified amount of data was not returned within the Timeout period." Neither fread nor fscanf works. Wireshark shows that packets are incoming.

[PTP]

Hi,

I am facing the same problem. Are you able to solve it now.

Regards

Answer 1

[Walter Roberson]

Either set datagram mode or else set the buffer size.

http://www.mathworks.com/help/instrument/writing-and-reading-data_f16-57447.html

A read operation with fread completes when one of these conditions is satisfied:

    The time specified by the Timeout property passes.

    The input buffer is filled.

    The specified number of values is read. For UDP objects, DatagramTerminateMode must be off.

    A datagram is received (for UDP objects, only when DatagramTerminateMode is on).

As you did not specify the number of objects in your fread(), the number is implicitly "inf".