DM163045 Microchip Technology, DM163045 Datasheet - Page 67

• Manufacturer Part Number: DM163045
• Description: PICDEM Lab Development Kit (with PICkit 3) General Purpose
• Manufacturer: Microchip Technology
• Series: PICDEM™r
• Type: MCUr

Specifications of DM163045

• Contents: Board, PIC kit 3
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: PIC Micro® MCU

© 2009 Microchip Technology Inc.
FIGURE 4-2:
As mentioned in the introduction, comparators on the PIC16F690 are able to function
independent of software logic. Therefore, all that is needed is to call the
Initialize() from main() to activate the peripheral. The Initialize()
configures Comparator 1 as follows:
• Turn on Comparator 1
• Make the Comparator 1 output available on the C1OUT pin
• Select pin C1IN+ as the non-inverting reference
• Select pin C12IN0- as the inverting reference
• Configure the C1OUT pin as an output
4.2.4.3
Using the Project Wizard, create a new project using the PIC16F690 entitled
Comparator_Lab1.mcp as was done in previous labs. Once completed, open the
Comparator_Lab2.c source file in MPLAB and do the following:
1. Copy/paste the code in Example 4-1 into the Initialize() section labeled:
EXAMPLE 4-1:
//ADD INITIALIZE CODE HERE
//Initialize Comparator 1 as follows:
//Turn comparator 1 on
C1ON = 1;
//Make the comparator output available on the
//C1OUT pin
C1OE = 1;
//Select the non-inverting pin (C1IN+) as the
//non-inverting reference input for the comparator 1
C1R = 0;
//Select the C12IN0- pin as the inverting reference
C1CH0 = 0;
C1CH1 = 0;
//Since the comparator 1 output shares the same pin
//as PORTA bit 2, configure the corresponding TRISA2 bit
//as an output
TRISA2 = 0;
PROCEDURE
MAIN() SOFTWARE CONTROL LOOP FLOWCHART FOR
COMPARATOR LAB 1
INITIALIZE CODE FOR COMPARATOR LAB 1
Loop Forever
Comparator Peripheral Labs
Initialize()
Wait
main()
DS41369A-page 63