add encoder

code/main.c

@@ -1,21 +1,52 @@
 #include <avr/io.h>
+#include <avr/interrupt.h>
 #include <util/delay.h>
 #include "avr-hd44780/lcd.h"
 
+volatile uint8_t counter = 0;
+
+void enc_init(){
+    PORTC |= (1<<2) | (1 << 3);
+    PCICR |= (1<<PCIE1);
+    PCMSK1 |= (1<<PCINT10);
+}
+
 int main(void){
-	DDRC |= 1<<0;
-	DDRC |= 1<<1;
-	DDRD |= 1<<7;
+    DDRC |= 1<<0;
+    DDRC |= 1<<1;
+    DDRD |= 1<<7;
+
+    PORTC ^= 1<<0;
+    _delay_ms(1000);
+    PORTC ^= 1<<1;
 
-	lcd_init();
-	lcd_on();
+    lcd_init();
+    lcd_on();
+    lcd_clear();
+    lcd_puts("test");
+
+    enc_init();
+    sei();
+
+    while(1){
 	lcd_clear();
-	lcd_puts("test");
+	lcd_printf("%d", counter);
+	_delay_ms(50);
+    }
+
+}
 
-	while(1){
-		PORTC ^= 1<<0;
-		_delay_ms(1000);
-		PORTC ^= 1<<1;
-	}
+ISR(PCINT1_vect){
+    if(PINC & (1<<2)){
+	if(PINC & (1<<3))
+	    counter--;
+	else if(!(PINC & (1<<3)))
+	    counter++;
+    }else{
+	if(PINC & (1<<3))
+	    counter++;
+	else if(!(PINC & (1<<3)))
+	    counter--;
 
+    }
 }