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How does the SlavefifoSync FW map a socket to the specify GPIF thread?
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How does the SlavefifoSync FW map a socket to the specify GPIF thread?

dadaqingwa posted on 30 Dec 2011 7:01 AM PST
Member
6 Forum Posts

The FX3 DATASHEET says, "EZ-USB® FX3™ provides up to four physical threads for data transfer over GPIF II. At a time, any one socket may be mapped to a thread. The sockets that are to be used must be mapped to a thread in the firmware."

How does the SlavefifoSync FW map a socket to the specify GPIF thread? Is this down by the FW? Where is it in the SlavefifoSync project?

Re: How does the SlavefifoSync FW map a socket to the specify GPIF thread?

Chris R. posted on 30 Dec 2011 10:59 AM PST
Top Contributor
135 Forum Posts

The mapping is done by the five last significant bits in the registers CY_U3P_PIB_GPIF_THREAD_CONFIG_ADDRESS(0...3) in the GPIF descriptors. There you can map one of the 32 sockets to each hardware thread.

Re: How does the SlavefifoSync FW map a socket to the specify GPIF thread?

dadaqingwa posted on 30 Dec 2011 06:20 PM PST
Member
6 Forum Posts

 Hi，Chris R. Thanks for your answer.

Do you know which document could I found the detail specification of the GPIFII config registers? 

Re: How does the SlavefifoSync FW map a socket to the specify GPIF thread?

Chris R. posted on 31 Dec 2011 11:08 PM PST
Top Contributor
135 Forum Posts

There is no document but the header file. Take a look into it by clicking "Go to declaration" in Eclipse.



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