dsPICDEM™ 1.1 Plus Development Board User’s Guide
DS70099D-page 42
©
2006 Microchip Technology Inc.
3.6
BOARD SELF-TEST CODE MODULE SUMMARY
The Board Self-Test Code module can be used to check that peripheral elements used
by the main demonstration program are operating correctly.
To run this code module:
1.
Apply power to the dsPICDEM™ 1.1 Plus Development Board,
2.
Press and hold down switch SW1 while pressing and releasing the Reset switch.
3.
Release SW1.
At this point, the dsPIC DSC device enters into a basic test code execution loop while
displaying the test code results on the LCD. The following data is displayed on the LCD:
• RP1-RP3 – As the potentiometers are rotated through their range, the displayed
value will vary from 0 to 0FFF.
• When SW1-SW4 are depressed, LED1-LED4 should light, respectively.
• At 25°C/77°F, the temperature sensor will yield a count of approximately
26x-27x. Touching U9 (TC1047A temperature sensor) should increase this count.
• A running counter is being sent to the Codec and read back when pins 2 and 3 of
J12 are connected together. There is an attenuation factor and a large phase shift
so the value will not be the same but the counter should be incrementing. (Jumper
J9 must be configured for the Slave setting.)
• A running counter is sent to the MCP41010 digital potentiometer. The D POT
value should be counting on the LCD.
When pin J2-3 is connected to J5-2 and pin J2-2 is connected to J5-3, “OK” will appear
on the lower right corner of the screen at power-up.
Содержание dsPICDEM 1.1 Plus
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