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2.7
DEBUGGING THE CODE
The MPLAB ICD 2 debugger/programmer can be used to run, halt, and step the code.
You can set a breakpoint so that program execution halts after the code has executed
the instruction at the breakpoint. A green arrow points to the next line to be executed.
The contents of the RAM and registers can be viewed when the processor has been
halted.
MPLAB ICD 2 uses the following function keys to access the main debugging functions:
<F5>
<F6>
<F7>
<F9>
Halt
Reset
Single Step
Run
There are more functions available by right clicking on a line of source code. The most
important of these are Set Breakpoint and Run to Cursor .
2.7.1
Display the Code
1. From the View menu, select Program Memory . The Program Memory window
displays.
2. Select the Symbolic tab at the bottom of the window.
3. Press <F5> to halt the processor. The program stops and the green arrow points
to the next instruction, as shown in Figure 2-19.
FIGURE 2-19:
PROGRAM HALTED
4. Press <F6> to reset the program. The green arrow moves to address 00000, the
goto _reset instruction, as shown in Figure 2-20. The linker inserted this
instruction to make the program branch to the start of the code.
FIGURE 2-20:
? 2004 Microchip Technology Inc.
PROGRAM RESET
DS51471A-page 27
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