Motorola MPC564EVB Instrukcja Użytkownika Pobierz pdf (Strona 85)

Chapter 3. Using the Monitor/Debug Firmware 3-35

Commands

STEP Step Over

Usage: STEP

The STEP command can be used to “step over” a subroutine call, rather than tracing every

instruction in the subroutine. The ST command sets a temporary software breakpoint one

instruction beyond the current program counter and then executes the target code. This command

only works when executing code in SRAM.

The STEP command can be used to “step over” BSR and JSR instructions.

The STEP command will work for other instructions as well, but note that if the STEP command

is used with an instruction that will not return, i.e. BRA, then the temporary breakpoint may never

be encountered and dBUG may never regain control.

Examples:

To pass over a subroutine call, the command is:

step

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Freescale Semiconductor, Inc.

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Motorola MPC564EVB Instrukcja Użytkownika Strona 85