16-bit QSPI transfer

[jrowland]

I've been playing around with the QSPI2Serial sample program. I ran into some problems trying to transfer 16-bit packets initially. I'm unfamiliar with the term "word align", however with a little fiddling I was able to get the transfer working. Below is a snippet of the modifications made.

Code: Select all

    
    //Initialize buffers
    static BYTE RXBuffer[2], TXBuffer[2]= {0xAB,0xCD};

The only thing that I don't like about this setting is that I had
to set the QueueBitSize to 18 instead of 16 which would have
made more sense

Code: Select all

    QSPIInit(3000000,	//Baudrate
    0x18,		//QueueBitSize
    0x1,		//CS
    0x0,		//CSPol
    0x0,		//ClkPolarity
    0x1,		//ClkPhase
    TRUE,		//doutHiz
    0x0,		//csToClockDelay
    0x0			//delayAfterTransfer
    );  // Keep overloaded defaults

So from here I can see what the buffer sends and what the buffer recieves. Another thing I don't understand
is why I had to decrement the pointer address for both buffers.

Code: Select all

    for (int i=0; i<=10; i++)
    {
        iprintf("TXBuffer is %X\n",TXBuffer[i]);
    }

    QSPIStart(TXBuffer-1, RXBuffer-1, 2, &QSPI_SEM); // Send data via QSPI
    OSSemPend( &QSPI_SEM, 0 );                     // Wait for QSPI to complete

    iprintf("\n\n");
    for (int i=0; i<=10; i++)
    {
        iprintf("RXBuffer is %X\n",RXBuffer[i]);
    }

Now is this the proper way to go about the problem or is it a quick solution that will
cause problems later on? Thanks for any input provided.