Initial Commit - Copy from Altus Metrum AltOS

ao-tools/target/timer/timer.c

@@ -0,0 +1,55 @@
+/*
+ * Copyright © 2008 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "cc1111.h"
+
+unsigned char irqs;
+
+void timer1_isr(void) interrupt 9 __reentrant
+{
+	++irqs;
+	if (irqs == 100) {
+		P1 ^= 0x2;
+		irqs = 0;
+	}
+}
+
+int
+main (void) __reentrant
+{
+	CLKCON = 0;
+	P1DIR = 0x2;
+	P1 = 0xff;
+
+	T1CTL = 0;
+
+	/* 30000 */
+	T1CC0H = 0x75;
+	T1CC0L = 0x30;
+	T1CCTL0 = T1CCTL_MODE_COMPARE;
+	T1CCTL1 = 0;
+	T1CCTL2 = 0;
+
+	/* clear timer value */
+	T1CNTL = 0;
+	OVFIM = 1;
+	T1CTL = T1CTL_MODE_MODULO | T1CTL_DIV_8;
+	T1IE = 1;
+	EA = 1;
+	for (;;);
+}