GENERAL: CAN'T WATCH A, B, AND C VARIABLES IN DEBUGGER

Information in this article applies to:

• dScope All Versions
• µVision All Versions

QUESTION

I load my program into the debugger and try to watch the variables a, b, and c in my program. The watch window shows strange values that are not correct for my variables. What's going on?

ANSWER

By default, the debugger (dScope or µVision) uses the name a to reference the accumulator (in the 51 and 251), b to access the B register (in the 51 and 251) and c to access the carry bit (in the 51 and 251). To access the variables from your program named a, b, and c, use a back quote (') before the variable. For example:

ws 'a
ws 'b
ws 'c

adds watchpoints for your variables. Note that you must use the back quote for all variables that have the same name as any reserved symbols (like r0, r1, r2, ...) in the debugger.

Last Reviewed: Monday, June 07, 2004