84 lines
1.3 KiB
C
84 lines
1.3 KiB
C
/*
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* opdracht 4.1.c
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*
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* Created: 03-Mar-21 9:26:31 AM
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* Author : lemms
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*/
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#define F_CPU 8e6
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#include <stdio.h>
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#include <stdlib.h>
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#include <avr/io.h>
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#include <util/delay.h>
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#include <avr/interrupt.h>
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#include "lcd_control.h"
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#define BIT(x) (1 << (x))
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void wait( int ms ) {
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for (int tms=0; tms<ms; tms++) {
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_delay_ms( 1 ); // library function (max 30 ms at 8MHz)
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}
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}
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void adcInit(){
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ADMUX = 0b11100000; // internal reference: 2.56V and SEI on ADC0 and left-adjusted.
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ADCSRA = 0b10000110; // enable ADC. No free-run. Clock 64 D-factor.
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}
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void timer2Init( void ) {
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TIMSK |= BIT(7); // T2 compare match interrupt enable
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sei(); // turn_on interrupt all
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TCCR2 = 0b00000011; // Initialize T2: timer, pre-scaler=64
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}
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ISR( TIMER2_COMP_vect ) {
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ADCSRA |= BIT(6);
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}
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int getADCValue(){
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int value = 0;
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value = ADCH;
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value <<= 2;
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value += (ADCL >> 6);
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return value;
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}
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int main(void)
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{
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int previousValue = 0;
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/* Replace with your application code */
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DDRF = 0x00; // set port F input.
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DDRE = 0xFF; // all port A output.
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init_4bits_mode();
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_delay_ms(10);
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lcd_clear();
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timer2Init();
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while (1)
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{
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PORTD = ADCH;
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PORTE = ADCL;
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int number = ADCH;
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if(previousValue != number){
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lcd_clear();
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wait(10);
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lcd_write_integer((getADCValue()));
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}
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previousValue = number;
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wait(100);
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}
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}
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