From 6075c41624efa8260344dfd4b0c7fa563f4cfe5e Mon Sep 17 00:00:00 2001
From: Julian T <julian@jtle.dk>
Date: Sun, 7 Jun 2020 23:40:14 +0200
Subject: Added solutions for many of the first exercises

---
 sem4/embedded/m6/m6.ino | 67 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 sem4/embedded/m6/m6.ino

(limited to 'sem4/embedded/m6/m6.ino')

diff --git a/sem4/embedded/m6/m6.ino b/sem4/embedded/m6/m6.ino
new file mode 100644
index 0000000..949c3d4
--- /dev/null
+++ b/sem4/embedded/m6/m6.ino
@@ -0,0 +1,67 @@
+#include <krnl.h>
+#define STACK 100
+#define BUTTONPIN 2
+#define LEDPIN 13
+
+char stk1[STACK];
+struct k_t *tsk1;
+struct k_msg_t *pmsg;
+char msgbuff[10];
+
+ISR(INT0_vect) {
+    static unsigned long last = 0;
+
+    unsigned long now = millis();
+    if (now - last < 100) {
+        return;
+    }
+    last = now;
+
+    static char state = 0;
+    state = !state;
+
+    ki_send(pmsg, (void *)&state);
+
+}
+
+void f1() {
+    while(true) {
+        char state;
+        int lost;
+        if (k_receive(pmsg, &state, 0, &lost) < 0) {
+            continue;
+        }
+
+        //k_eat_msec_time(1000);
+
+        Serial.print("Lost: "); Serial.println(lost);
+
+        digitalWrite(LEDPIN, state);
+    }
+}
+
+void setup()
+{
+    pinMode(LEDPIN, OUTPUT);
+
+	pinMode(BUTTONPIN, INPUT_PULLUP);
+	// Enable interrupt 0
+	EIMSK |= 1 << INT0;
+	// Eable on rising edge
+	EICRA |= (1 << ISC01);
+
+    Serial.begin(115200);
+    Serial.println("Starting");
+
+    k_init(1, 0, 1);
+
+    pmsg = k_crt_send_Q(10, 1, msgbuff);
+    tsk1 = k_crt_task(f1, 10, stk1, STACK);
+
+    k_start(1);
+}
+
+void loop()
+{
+
+}
-- 
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