Added some exercise solutions

1 files changed, 47 insertions, 0 deletions

diff --git a/sem4/embedded/m1/int/int.ino b/sem4/embedded/m1/int/int.ino
new file mode 100644
index 0000000..8978be7
--- /dev/null
+++ b/sem4/embedded/m1/int/int.ino
@@ -0,0 +1,47 @@
+#define LEDPIN 13
+#define BUTTONPIN 2
+
+#define DEBOUNCE 1
+
+ISR(INT0_vect) {
+	static bool state = 0;
+
+	// Toggle LEDPIN
+	digitalWrite(LEDPIN, state);
+	state = !state;
+
+	/*
+	for(long i = 0; i < 1000; i++) {
+		Serial.print("Hej ");
+		Serial.println(i);
+
+	}
+	*/
+}
+
+void setup() {
+
+	// We need to talk
+	Serial.begin(9600);
+
+	// Setup pinmodes
+	pinMode(LEDPIN, OUTPUT);
+	pinMode(BUTTONPIN, INPUT_PULLUP);
+
+	// Attach a interrupt on the button
+	//attachInterrupt(digitalPinToInterrupt(BUTTONPIN), testy, RISING);
+	
+	// Enable interrupt 0
+	EIMSK |= 1 << INT0;
+	// Eable on rising edge
+	EICRA |= (1 << ISC01) | (1 << ISC00);
+
+}
+
+void loop() {
+	static int i = 0;
+
+	//Serial.print("Cool stuff happening now ");
+	//Serial.println(i++);
+
+}