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Altera_Forum's avatar
Altera_Forum
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9 years ago

Fast data tranfer to PC

Hallo, I am trying to implement a new project where I want to use an FPGA as a kind of DAQ system. Basically the FPGA is reading about 70 sensors sending asynchronously with a maximum bit rate ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

Hello Ctzof,

Your solution is realistic, there is no reason why it should not work, be sure however to choose because of the right reasons;

You are right that with UDP, you need to implement retries on the user layer, this means you have to program retries yourselves if a message is lost (implement some sort of handshake or message counter). TCP/IP has this implemented in the protocol layer itself, this is a major advantage for TCP/IP.

On the other hand, TCP/IP is stream oriented, this means that there is a continuous stream of bytes between the 2 communication partners where your program has to determine where a message starts and where it ends. It is like a water pipe, on the one side you pour bytes in, on the other they come out. Once you are 1 byte off on the reciever side, you are lost. UPD has the concept of sending data telegram by telegram, this makes synchronizing client and server much easier and adds to the reliability of the solution in the long term.

Best regards,

Johi