PICDEM2 datasheet(17/60 Pages) MICROCHIP

Teilenummer	PICDEM2

Bauteilbeschribung	simple board

PDF	60 Pages

Scroll/Zoom	100%

Hersteller	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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17 / 60 page

PICDEM 2 User’s Guide

DS30374D-page 12

 2001 Microchip Technology Inc.

4.1 Main Routine

The main routine of a2d.asm handles the initialization of the PICmicro MCU

and then waits in an infinite loop. The first few lines set PORTA as inputs and

PORTB as outputs. InitializeAD, the Analog to Digital converter initialization

routine, is then called. After the return from InitializeAD, the routine waits

for Tad (A/D conversion clock) and then starts an A/D conversion. The

program then enters an infinite loop with the reading of the A/D and the

updating of the LEDs handled by an interrupt routine Service_Int.

Figure 4.2: Main Routine

Start

Configure PORT B

Configure PORT A

(InitializeAD)

Wait for Tad

(SetupDelay)

Start A/D conversion

Service_Int

Initialize A/D module

A/D Complete?

Yes

PICDEM2 Datenblatt(PDF) 17 Page - Microchip Technology