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

Version 2
Created by content.librarian on Mar 13, 2017 11:47 PM. Last modified by GeethaP_31 on Jul 10, 2020 4:53 AM.

    Version: **

     

    Translation - Japanese: PDL 2.1.0 の Dstc_ClearDreqenbBit() 関数が DREQENB レジスタビットをクリアせずにセットしてしまいます - KBA218861 - Community Translated (JA)

     

    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.