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C51: Use of Dual Data Pointers


Information in this article applies to:

  • C51 All Versions

SYMPTOM

When I enable dual data pointer support for my device, I notice no change in the object code generated by the compiler.

CAUSE

The Keil toolset only provides dual data pointer support via the C libraries. It does not generate DDP instructions when compiling user code.

RESOLUTION

If you wish to take advantage of DDP support, use one of the following library functions.

  • MEMCPY
  • MEMMOVE
  • MEMCMP
  • STRCPY
  • STRCMP

SEE ALSO


Last Reviewed: Thursday, February 25, 2021


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