Rotačný enkodér

Záverečný projekt predmetu MIPS / LS2023 - Viktor Fos

Zadanie

Rotačný enkóder - vytvorime program pre zadávanie hodnoty nejakej veličiny na LCD displeji pomocou tohoto enkodéra. Jednoduché menu, výber hodnoty a zadávanie číselnej veličiny so zmenou nahor/nadol a potvrdenie stlačením.

Vývojová doska ACROB.

Literatúra:

• Dokumentácia k Rotačnemu enkóderu
• Dokumentácia k LCD display-u

Analýza a opis riešenia

Najprv som podľa schémy zapojenia pripojil LCD displej a rotačný enkoder na dosku Arduino Uno.

Schéma zapojenia

Algoritmus a program

Algoritmus programu je....

AVR C-codearduino

#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>

#define clk_pin PB3
#define data_pin PB4
#define swt_pin PB5

volatile int counter = 0;
volatile bool buttonPressed = false;

enum MenuState { MENU_MAIN, MENU_VALUE };
volatile MenuState menuState = MENU_MAIN;

void initLCD() {
    DDRD |= (1 << PD0) | (1 << PD1) | (1 << PD2) | (1 << PD3) | (1 << PD4) | (1 << PD5);
    PORTD = 0x20;
    PORTD |= 0x04;
    PORTD &= ~0x04;
    sendLCDCommand(0x28);
    sendLCDCommand(0x0C);
    sendLCDCommand(0x01);
    DDRB &= ~((1 << clk_pin) | (1 << data_pin) | (1 << swt_pin));
    PORTB |= (1 << clk_pin) | (1 << data_pin) | (1 << swt_pin);
}

void sendLCDCommand(uint8_t command) {
    PORTD = (command & 0xF0);
    PORTD &= ~(1 << PD4);
    PORTD |= (1 << PD5);
    _delay_us(1);
    PORTD &= ~(1 << PD5);
    PORTD = ((command << 4) & 0xF0);
    PORTD &= ~(1 << PD4);
    PORTD |= (1 << PD5);
    _delay_us(1);
    PORTD &= ~(1 << PD5);
    _delay_us(40);
}

void sendLCDData(uint8_t data) {
    PORTD = (data & 0xF0);
    PORTD |= (1 << PD4);
    PORTD |= (1 << PD5);
    _delay_us(1);
    PORTD &= ~(1 << PD5);
    PORTD = ((data << 4) & 0xF0);
    PORTD |= (1 << PD4);
    PORTD |= (1 << PD5);
    _delay_us(1);
    PORTD &= ~(1 << PD5);
    _delay_us(40);
}

void updateCounterDisplay() {
    sendLCDCommand(0x80 | 0x40);
    sendLCDData('P');
    sendLCDData('o');
    sendLCDData('s');
    sendLCDData('i');
    sendLCDData('t');
    sendLCDData('i');
    sendLCDData('o');
    sendLCDData('n');
    sendLCDData(':');
    sendLCDCommand(0x80 | 0x40 | 0x09);
    sendLCDData(' ');
    sendLCDData(' ');
    sendLCDData(' ');
    sendLCDData(' ');
    sendLCDData(' ');
    sendLCDData(' ');
    sendLCDData(' ');
    sendLCDData(' ');
    sendLCDCommand(0x80 | 0x40 | 0x09);
    sendLCDData((counter / 100) + '0');
    sendLCDData(((counter / 10) % 10) + '0');
    sendLCDData((counter % 10) + '0');
}

void handleMainMenu() {
    if ((PINB & (1 << clk_pin)) != 0) {
        if ((PINB & (1 << data_pin)) != 0) {
            counter++;
        } else {
            counter--;
        }
        updateCounterDisplay();
    }
    
    if ((PINB & (1 << swt_pin)) == 0 && !buttonPressed) {
        buttonPressed = true;
        sendLCDCommand(0x01);
        sendLCDData('P');
        sendLCDData('r');
        sendLCDData('e');
        sendLCDData('s');
        sendLCDData('s');
        sendLCDData('e');
        sendLCDData('d');
        _delay_ms(500);
        sendLCDCommand(0x01);
        menuState = MENU_VALUE;
        updateCounterDisplay();
    } else if ((PINB & (1 << swt_pin)) != 0) {
        buttonPressed = false;
    }
}

void handleValueMenu() {
    if ((PINB & (1 << clk_pin)) != 0) {
        if ((PINB & (1 << data_pin)) != 0) {
            counter++;
        } else {
            counter--;
        }
        sendLCDCommand(0x80 | 0x40);
        sendLCDData('P');
        sendLCDData('o');
        sendLCDData('s');
        sendLCDData('i');
        sendLCDData('t');
        sendLCDData('i');
        sendLCDData('o');
        sendLCDData('n');
        sendLCDData(':');
        sendLCDCommand(0x80 | 0x40 | 0x09);
        sendLCDData((counter / 100) + '0');
        sendLCDData(((counter / 10) % 10) + '0');
        sendLCDData((counter % 10) + '0');
    }
    
    if ((PINB & (1 << swt_pin)) == 0 && !buttonPressed) {
        menuState = MENU_MAIN;
        sendLCDCommand(0x01);
        sendLCDData('V');
        sendLCDData('a');
        sendLCDData('l');
        sendLCDData('u');
        sendLCDData('e');
        sendLCDData(' ');
        sendLCDData('e');
        sendLCDData('n');
        sendLCDData('t');
        sendLCDData('e');
        sendLCDData('r');
        sendLCDData('e');
        sendLCDData('d');
        sendLCDCommand(0x80 | 0x40);
        sendLCDData(' ');
        sendLCDData(' ');
        sendLCDData(' ');
        sendLCDData(' ');
        sendLCDData(' ');
        sendLCDData(' ');
        sendLCDData(' ');
        sendLCDData(' ');
        sendLCDCommand(0x01);
        sendLCDData(' ');
        sendLCDData('R');
        sendLCDData('o');
        sendLCDData('t');
        sendLCDData('a');
        sendLCDData('r');
        sendLCDData('y');
        sendLCDData(' ');
        sendLCDData('E');
        sendLCDData('n');
        sendLCDData('c');
        sendLCDData('o');
        sendLCDData('d');
        sendLCDData('e');
        sendLCDData('r');
        sendLCDData(' ');
        sendLCDData(' ');
        sendLCDData(' ');
        sendLCDData(' ');
        sendLCDData(' ');
        sendLCDData(' ');
        sendLCDData(' ');
        sendLCDData(' ');
        updateCounterDisplay();
    } else if ((PINB & (1 << swt_pin)) != 0) {
        buttonPressed = false;
    }
}

int main(void) {
    initLCD();
    sei();
    
    while (1) {
        switch (menuState) {
            case MENU_MAIN:
                handleMainMenu();
                break;
            case MENU_VALUE:
                handleValueMenu();
                break;
        }
    }
}

#include <avr/io.h>

void adc_init(void);                                   // A/D converter initialization

unsigned int adc_read(char a_pin);

Pridajte sem aj zbalený kompletný projekt, napríklad takto (použite jednoznačné pomenovanie, nemôžeme mať na serveri 10x zdrojaky.zip:

Zdrojový kód: zdrojaky.zip

Overenie

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Aplikácia.

Video:

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