STM32L476 USB FIFO Settings
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‎2015-10-31 2:43 PM
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‎2015-11-01 10:37 AM
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‎2015-11-02 12:58 PM
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‎2015-11-02 1:15 PM
I think at this point I might try and contact an FAE
Historically the FAEs haven't participate here, never quite understood why not. Any way they would be your most effective conduit to the engineers. The USB IP has been developed by a third-party, as I recall.Up vote any posts that you find helpful, it shows what's working..
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‎2015-11-02 1:57 PM
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‎2015-11-03 6:09 AM
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‎2015-11-03 7:42 AM
http://www.synopsys.com/IP/InterfaceIP/USB/Pages/default.aspx
Up vote any posts that you find helpful, it shows what's working..
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‎2015-11-05 7:38 AM
Hello,
The information about Reception FIFO size is hidden in chapter 47.11.3 - FIFO RAM allocation. It describes all the parts that should be allocated inside the reception FIFO for correct functionality.
But unfortunately without final equation and example – definitely something to be improved.
To set the FIFO size use:
Device RxFIFO =
(4 * number of control endpoints + 6) + ((largest USB packet used / 4) + 1 for
status information) + (2 * number of OUT endpoints) + 1 for Global NAK
With default value of 128 words you are safe.
Best regards,
Milan
