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Microcontrollers/opdracht 4.3/main.c

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