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K81/82 USB accessing Flash area

Question asked by Ismail Bari on Jan 31, 2017
Latest reply on Feb 7, 2017 by Ismail Bari



I am using K81 / K82 MCUs and got the USB CCID interface working. If I move the USB descriptors to flash area, then USB enumeration fails. I have tried the following but it doesn't work.


/* Disable MPU. All accesses from all bus masters are allowed now. */
MPU_CESR = (0);


// Set read access for USB master #3

FMC_PFAPR |= FMC_PFAPR_M3AP(01);   // USB is master #3


// USB master 3 is trusted for read access



Is there anything I am missing?