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PICDEM TM Lab Development Board User’s Guide
EXAMPLE 3-5:
DO_OUTPUT() CODE FOR LAB 2
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^=
^=
^=
^=
^=
^=
^=
^=
1;//XOR
1;//XOR
1;//XOR
1;//XOR
1;//XOR
1;//XOR
1;//XOR
1;//XOR
current
current
current
current
current
current
current
current
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value
value
value
value
value
value
value
value
with
with
with
with
with
with
with
with
1
1
1
1
1
1
1
1
3. Copy/paste the code in Example 3-6 into the Timing() section labeled:
//ADD TIMING CODE HERE
EXAMPLE 3-6:
TIMING() FOR LAB 2
//--------DELAY 1second-------------------------
//Variable used in delay loop
unsigned int delay_var1 = 45571;
unsigned char delay_var2 = 3;
//Nested while loops to implement a 1 second delay
//Decrement delay_var2, if 0 jump out of loop
while(--delay_var2)
{
//Decrement delay_var1, if 0 jump out of loop
while(--delay_var1);
}
4. Copy/paste the code in Example 3-7 over the main() code from the previous lab
to incorporate the Timing() .
EXAMPLE 3-7:
MAIN() CODE FOR LAB 2
Initialize(); //Initialize the relevant registers
while(1)
{
Do_Outputs(); //Perform any outputs
Timing();//Sets execution rate of the
//Software Control Loop
}
Compile the project. There should be no errors.
3.3.5.3
TESTING THE APPLICATION
Program the PIC16F690. The LEDs connected to the individual PORTC pins should
now all flash on/off in 1 second intervals.
The solution for this project is located in the
C:\PICDEM_Lab\GPIO_Labs\GPIO_Lab2\solution directory .
DS41369A-page 28
? 2009 Microchip Technology Inc.
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