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Vybrid QSPI-flash status request issue

Question asked by Thomas Fredriksen on Jul 14, 2015
Latest reply on Jul 28, 2015 by Thomas Fredriksen

I am having some issues with requesting the status of the S25FL128S QSPI-flash chip on the TWR-VF65GS10 dev-kit. I initialize the chip in MQX in the following manner:

 

     Open device

     Set single IO mode

     Get virtual memory base offset

     Get total memory length

     Get sector size

 

At first status request, reading status1 on S25FL128S gives:

 

     [INFO ]       QSPI0 status code: 0xAA

     [INFO ]       ... Write in progress ............... : False

     [INFO ]       ... Write enable latch .............. : True

     [INFO ]       ... Block protection 1 .............. : False

     [INFO ]       ... Block protection 2 .............. : True

     [INFO ]       ... Block protection 3 .............. : False

     [INFO ]       ... Erase error occurred ............ : True

     [INFO ]       ... Programming error occurred ...... : False

     [INFO ]       ... Status register Write Disable ... : True

 

This happens even after I have done a hard-reset prior to loading my program. After doing any operation (typically erase or write), the next status code is "0xFF"

 

I based my QSPI driver on the bundled MQX example and the MQX IO User Guide. My status read function is in the following manner:

 

     Build flash command: QuadSPI_READ_STATUS1, QuadSPI_READ_DATA(QuadSPI_SINGLE_PAD, 1), QuadSPI_LOOKUP_STOP

     Write command

     Read 1 byte

 

Does anyone have any input on this?

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