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authorDimitri Sokolyuk <demon@dim13.org>2011-07-12 00:54:33 +0000
committerDimitri Sokolyuk <demon@dim13.org>2011-07-12 00:54:33 +0000
commitb4a9b392c57ca8b3f740dd3035b1f43b4ad583b4 (patch)
treeeeda7f987ad9abf16a5954ce250dc51cf0b1ac41 /kernel/clock.c
parent42a1324ba256967ca11fa1a81ef3d2ac3d10c491 (diff)
add clock, redesign timer, tweak stack values
Diffstat (limited to 'kernel/clock.c')
-rw-r--r--kernel/clock.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/kernel/clock.c b/kernel/clock.c
new file mode 100644
index 0000000..c098481
--- /dev/null
+++ b/kernel/clock.c
@@ -0,0 +1,50 @@
+/* $Id$ */
+/*
+ * Copyright (c) 2011 Dimitri Sokolyuk <demon@dim13.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <inttypes.h>
+#include <avr/io.h>
+#include <stdlib.h>
+#include "kernel.h"
+#include "tasks.h"
+
+void
+clock(void *arg)
+{
+ struct clockarg *a = arg;
+
+ a->s = a->m = a->h = a->d = 0;
+
+ update(0, SEC(1));
+
+ for (;;) {
+ a->s += 1;
+ if (a->s == 60) {
+ a->s = 0;
+ a->m += 1;
+ }
+ if (a->m == 60) {
+ a->m = 0;
+ a->h += 1;
+ }
+ if (a->h == 24) {
+ a->h = 0;
+ a->d += 1;
+ }
+
+ sleep(HARD, SEC(1));
+ }
+}