C166: Obtaining the Segment Offset of an SFR

Information in this article applies to:

• C166 Version 4.03 and Later

QUESTION

I am trying to obtain the segment offset of an SFR. When I compile my project it generates an application error. I am using the intrinsic _sof_() function. What am I doing wrong?

ANSWER

The _sof_ function is not required for SFRs. Instead write something like:

DSTP0 = (unsigned int) &S0TBUF;     // S0TBUF is an SFR.

This will give you the segment offset for the SFR.

MORE INFORMATION

• Refer to _sof_ in the C166 User's Guide.

Last Reviewed: Thursday, February 25, 2021