From 1c467ff1929b5e243bb97d7c3a51f40070d67f7d Mon Sep 17 00:00:00 2001
From: agsler <agsler@elab-rot.ags.etc.tu-bs.de>
Date: Sat, 13 Jan 2024 00:37:07 +0100
Subject: [PATCH] add encoder

---
 code/main.c | 53 ++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 42 insertions(+), 11 deletions(-)

diff --git a/code/main.c b/code/main.c
index 9e18447..c27dd35 100644
--- a/code/main.c
+++ b/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--;
 
+    }
 }