Dstc_ClearDreqenbBit() function in PDL 2.1.0 sets DREQENB register bit instead of clearing it - KBA218861

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Created by content.librarian on Mar 13, 2017 11:47 PM. Last modified by content.librarian on Mar 16, 2017 2:59 AM.
Version 1
    Version: **

     

    Question:

    The Dstc_ClearDreqenbBit() function in Peripheral Driver Library (PDL) 2.1.0 sets the DREQENB register bit instead of clearing it. The problem is reproducible on the FM0+ and FM4 family of devices when using the DSTC driver from PDL 2.1.0. Is there a workaround? 

     

    Answer:

    There is a workaround, which requires manual PDL source modification. Open the file /drivers/dstc/dstc.c and find the Dstc_ClearDreqenbBit() function. Replace the following line:

    *(uint32_t*)(uint32_t)(((uint32_t)(&FM_DSTC->DREQENB0)) + ((4ul * (uint32_t)u8WordPos))) |= u32BitPosRelative; 

    with the line:

    *(uint32_t*)(uint32_t)(((uint32_t)(&FM_DSTC->DREQENB0)) + ((4ul * (uint32_t)u8WordPos))) &= ~(u32BitPosRelative);

    This problem will be corrected in the next PDL 2.x release. Contact Cypress technical support (www.cypress.com/mycases) for possible firmware updates and help with using the DREQENB register.