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From: Noman on 27 Feb 2010 11:47
My transmitter code is:

u1=udp('192.168.1.55', 9091,'LocalPort', 9090);
set(u1, 'OutputBufferSize', 8192)
set(u1, 'TimeOut', 10)
fopen(u1)
get(u1, 'Status')
while(1)
fwrite(u1, ubuffer(1,:), 'double'); %ubuffer is of size 1x1024
end
fclose(u1)
delete(u1)

My receiver code is:

u=udp('192.168.1.166', 9090, 'LocalPort', 9091, 'InputBufferSize', 8192, 'TimeOut', 10);
fopen(u);
while(1)
[a,count]= fread(u, 1024, 'double');
end
fclose(u)
delete(u)

My problem is that as soon as i increase the number of elements transmitted past 64, i can only receive 64 elements at receiver. Like if i transmit 1x1024 element array, at receiver i get first 64 elements only. Like at this line of code at receiver:

[a,count]= fread(u, 1024, 'double');

i only get 'a' of size 64x1, although i should get 1024x1 size of 'a'. The value of count is also 64, it should be 1024.

To rectify this i have to use a loop and make a 2d array at receiver like 64x16 for 1024 element transmitted array. Also i get a warning "The specified amount of data was not returned in time" after reading every 64 elements. Is there any solution to receive all elements like 1024 in one go??? like i dont have to use loop just
[a,count]= fread(u, 1024, 'double');
and i get all the transmitted elements.

My second problem is that i cannot transmit complex numbers using UDP. I transmit 3 complex numbers and at receiver i only get real part of these complex numbers. Any ideas????
From: cpp.matlab on 21 Mar 2010 12:35
Use real(Z) and Imag(Z).
Split one complex number into two numbers and send via UDP.

Best...



On Feb 27, 12:47 pm, "Noman " <m.neman.sha...(a)live.com> wrote:
> My transmitter code is:
>
> u1=udp('192.168.1.55', 9091,'LocalPort', 9090);
> set(u1, 'OutputBufferSize', 8192)
> set(u1, 'TimeOut', 10)
> fopen(u1)
> get(u1, 'Status')
> while(1)
> fwrite(u1, ubuffer(1,:), 'double');  %ubuffer is of size 1x1024
> end
> fclose(u1)
> delete(u1)
>
> My receiver code is:
>
> u=udp('192.168.1.166', 9090, 'LocalPort', 9091, 'InputBufferSize', 8192, 'TimeOut', 10);
> fopen(u);
> while(1)
> [a,count]= fread(u, 1024, 'double');
> end
> fclose(u)
> delete(u)
>
> My problem is that as soon as i increase the number of elements transmitted past 64, i can only receive 64 elements at receiver. Like if i transmit 1x1024 element array, at receiver i get first 64 elements only. Like at this line of code at receiver:
>
> [a,count]= fread(u, 1024, 'double');
>
> i only get 'a' of size 64x1, although i should get 1024x1 size of 'a'. The value of count is also 64, it should be 1024.
>
> To rectify this i have to use a loop and make a 2d array at receiver like 64x16 for 1024 element transmitted array. Also i get a warning "The specified amount of data was not returned in time" after reading every 64 elements. Is there any solution to receive all elements like 1024 in one go??? like i dont have to use loop just
> [a,count]= fread(u, 1024, 'double');
> and i get all the transmitted elements.
>
> My second problem is that i cannot transmit complex numbers usingUDP. I transmit 3 complex numbers and at receiver i only get real part of these complex numbers. Any ideas????

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