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Thermal Interface Demonstration
FIGURE 3-3:
WATCH WINDOW CONFIGURATION
6. Select Debugger>Program to program the demonstration application into the
dsPIC33FJ12GP202 device.
3.4
RUNNING THE DEMONSTRATION
To run the demonstration and observe the results, perform the following steps:
1. While in MPLAB IDE, select Debugger>Reset to reset MPLAB REAL ICE
in-circuit emulator.
2. Select Debugger>Run to run the demonstration program.
3. Allow the program to run for a few seconds, and then halt program execution by
selecting Debugger>Halt .
4. You should see the temperature value displayed in the Watch window variable
Temperature . Note that a temperature close to 25 degrees Celsius is displayed
if the thermocouple junction is kept at room temperature.
5. If you see a significantly smaller or larger temperature value displayed, adjust the
R38 potentiometer screw using a small screwdriver and repeat steps 1-4 until
you see a temperature close to room temperature (i.e., 25oC).
6. Repeat steps 1-3, but this time with the thermocouple junction either dipped in a
hot liquid, touching a warm surface, or simply held tightly between your fingers.
As long as the program is running, you should see the LinearOut variable
value in the Watch window continuously increasing and decreasing with
temperature. You should also see the corresponding graph in the DMCI window
rising and falling with temperature. On halting the program execution, you should
see the current temperature displayed in the Watch window.
? 2008 Microchip Technology Inc.
DS70574A-page 21
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