How could the 'Serial write time out' happen

Question

I implemented an algorithm into fpga board. I wrote the Matrix data to FPGA board from Matlab and the result came back. I was using a loop to execute the operation many times. It can operate normally for some times, but in the end it stopped with the error in the line : fwrite(sx,datafile,'int8'); and the error messege showed : serial.fwrite A timeout occurred during the write operation. How could it happen? How could it execute some trials but happen time out error at some time?

Andrew Holme · Accepted Answer

Are you using handshaking for flow control?

ZHI · Answer

I am using hardware for flow control.Andrew Holme wrote:

Andrew Holme · Answer

Maybe it timed-out because the receiver would not accept any more data.

ZHI · Answer

Actually i don't have much experinece on fpga design. But in my case, ineed send many different Matrix and vectors into FPGA  borad, which hasbeen implemented my algorithm many times.  That is, everything is samebut the data writing into the board. I set the number of trials is 10K.It never finish the operation, in end it stopped on a trial (randomly).If receiver cannot accept any more data, why it not stop on the firsttrial

How could the 'Serial write time out' happen

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