How to transmit 96 bits using RS232?

I try to divide the 96 bits in groups of 8 bits and sent them using RS232, after the 96 bits have been sent to a FPGA and it done some operations, I need transmit from the fpga to a computer, a group of 32 bits. Somebody can help me. I try to use the following code in a loop

>>hpo=serial ('COM4','BaudRate',115200,'DataBits',8, 'Parity','none','StopBits',1,'ReadAsyncMode','continuous');

>>DataC=fread(hpo,1);

But I got the following error

Warning: Unsuccessful read: The specified amount of data was not returned within

Thanks

Answer 1

[Ganesh Gaonkar]

Some hardware requires hardware-handshaking for communication. This is done by setting the "flowcontrol" to hardware like below:

set(hpo,'FlowControl','hardware');

You can try adding this command after your first command and see if that can solve the issue.

[Ana]

Thanks Ganesh Gaonkar, I add the command but I get an error.

Answer 2

[Ana]

I need send 3 package of 32 bits to a FPGA and after few operations doing by the FPGA, I need transfer a package of 32 bits from the FPGA to my computer using RS232, now I have stored my data in a .txt and these data are in binary form, and I use the following command to separate the 3 first data of my .txt file

 clear all;
 close all;
 clc;
 Data1=['000000' data(j,:)];

After send the data, I need to receive in my computer 32 bits, and in the code to program the FPGA I resolve this problem sending 4 package of 8 bits, and in matlab I using the following command:

 hpo=serial ('COM4','BaudRate',115200,'DataBits',8, 'Parity','none','StopBits',1,'ReadAsyncMode','continuous ');

 DataC=fread(hpo,3);
 for i=1:4
 DataC=fread(hpo);
 arr(i)=DataC
 end

 fclose(hpo);
 delete(hpo);
 clear hpo;

But when I communicate the PFGA and the computer I get the following error:

 Unsuccessful read: The specified amount of data was not returned within the
Timeout period.

Please Can you Help me?