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What timeout xferdata have? | Cypress Semiconductor

What timeout xferdata have?

Summary: 1 Reply, Latest post by RSKV on 26 May 2013 11:48 PM PDT
Verified Answers: 0
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user_55294358's picture
186 posts


in slave fifo bulk mode, if read is faster than write to fifo buffer when xferdata is start,

How much have timeout ? (that is maybe stall time). 

If i dont write under 512 byte, xferdata is stall forever?

rskv's picture
Cypress Employee
1134 posts


Device (FX2LP) NAKs the IN requests whenever it does not have any data to send.
Whenever the FPGA connected to GPIF writes some data then it will respond with that data. Otherwise, it will continuously NAK the IN requests.

Coming to the timeout value,
Xferdata function returns failure if it does not receive any data with in that time out value. You can change this parameter before calling Xferdata function.

sai krishna.

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