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AprendePIC18 CALETAS

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CALETAS · AprendePIC18

Tutor IA

Start here
Foundations
First program
- Using GPIO ports
- Tutorial — First LED
Partial I prep
- Partial I preparation
- Theory exam guide
Delays
GPIO
- GPIO - TRIS, PORT and LAT
- Buttons, pull-up and debounce
Comparisons
Practice 1 — ALU
- ALU operations in assembly
- Tutorial — Practice 1: Math operations
Partial II prep
- Partial II preparation
- Exam-style exercise bank
Interrupts
LCD and keyboard
- HD44780 LCD and matrix keyboard
- Tutorial — Practice 2: Keyboard and LCD
Timers
PWM / CCP
Partial III prep
- Partial III preparation
- Exam-style exercise bank
ADC
- Analog-to-Digital Converter (ADC)
- Tutorial — Practice 7: A/D converter
Communication
Partial IV prep
Reference and review
Extra projects
- Project - Traffic light
- Project - Tank level control
Tutorial index

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Guide tracker

Using GPIO ports

Step 11 of 11

You are building

A `.ASM` that builds, loads in Proteus, and makes an **LED on RB0** follow a **button on RB1** using TRIS → LAT → PORT.

1 Welcome: what you will achieve
2 Create project and .ASM file
3 LIST and #include
4 Course config bits
5 Reset vector and sandwich layout
6 TRIS: RB0 output, RB1 input
7 Wire LED and button in Proteus
8 LAT: turn on the LED (first test)
9 PORT: button controls the LED
10 Review final program and save
11 Check what you learned

Guide tracker

Using GPIO ports

Step 11 of 11

You are building

A `.ASM` that builds, loads in Proteus, and makes an **LED on RB0** follow a **button on RB1** using TRIS → LAT → PORT.

1 Welcome: what you will achieve
2 Create project and .ASM file
3 LIST and #include
4 Course config bits
5 Reset vector and sandwich layout
6 TRIS: RB0 output, RB1 input
7 Wire LED and button in Proteus
8 LAT: turn on the LED (first test)
9 PORT: button controls the LED
10 Review final program and save
11 Check what you learned

Guides / Using GPIO ports

Step 11 of 11

Check what you learned

5-question mini exam. If you miss one, return to the step shown in the explanation — the tracker shows which.

When you pass, you are ready for First LED on the study path.

Checklist before you continue

I answered the quiz (you can retry).
Steps 0–9 all checked in the tracker.

0 of 0 answered

What must your program do BEFORE writing LATB to turn on an LED?

Configure TRISB (pin direction) Read PORTB Set WDT = ON Write ADCON0

In TRISB, `BCF TRISB, 0` makes RB0...

Output Input Analog Reset

To read a button on RB1 you must use...

PORTB LATB TRISB TMR0

The PIC18 reset vector in this guide is at...

ORG 0x0000 ORG 0x0008 ORG 0x0100 At the end of the loop

To turn on an LED on RB0 (already configured as output) you write to...

LATB PORTB TRISB STATUS

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← Review final program and save Guide complete ✓

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Tutorial — First LED (first program)

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