initial mc1322x commit

based on commit aac3a355451d899f02737f2907af8c874ee4feba of

git://git.devl.org/git/malvira/contiki-mc1322x.git

cpu/mc1322x/clock.c

@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
+ * to the MC1322x project (http://mc1322x.devl.org) and Contiki.
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki OS.
+ *
+ * $Id: clock.c,v 1.1 2010/06/09 14:43:22 maralvira Exp $
+ */
+
+#include <sys/clock.h>
+#include <sys/cc.h>
+#include <sys/etimer.h>
+#include "dev/leds.h"
+
+#include "contiki-conf.h"
+#include "mc1322x.h"
+
+#include "contiki-conf.h"
+
+#define MAX_TICKS (~((clock_time_t)0) / 2)
+
+static volatile clock_time_t current_clock = 0;
+
+volatile unsigned long seconds = 0;
+
+void
+clock_init()
+{
+	/* timer setup */
+	/* CTRL */
+#define COUNT_MODE 1      /* use rising edge of primary source */
+#define PRIME_SRC  0xf    /* Perip. clock with 128 prescale (for 24Mhz = 187500Hz)*/
+#define SEC_SRC    0      /* don't need this */
+#define ONCE       0      /* keep counting */
+#define LEN        1      /* count until compare then reload with value in LOAD */
+#define DIR        0      /* count up */
+#define CO_INIT    0      /* other counters cannot force a re-initialization of this counter */
+#define OUT_MODE   0      /* OFLAG is asserted while counter is active */
+
+	*TMR_ENBL = 0;                     /* tmrs reset to enabled */
+	*TMR0_SCTRL = 0;
+	*TMR0_CSCTRL =0x0040;
+	*TMR0_LOAD = 0;                    /* reload to zero */
+	*TMR0_COMP_UP = 1875;             /* trigger a reload at the end */
+	*TMR0_CMPLD1 = 1875;              /* compare 1 triggered reload level, 10HZ maybe? */
+	*TMR0_CNTR = 0;                    /* reset count register */
+	*TMR0_CTRL = (COUNT_MODE<<13) | (PRIME_SRC<<9) | (SEC_SRC<<7) | (ONCE<<6) | (LEN<<5) | (DIR<<4) | (CO_INIT<<3) | (OUT_MODE);
+	*TMR_ENBL = 0xf;                   /* enable all the timers --- why not? */
+
+	enable_irq(TMR);
+
+}
+
+void tmr0_isr(void) {
+	if(bit_is_set(*TMR(0,CSCTRL),TCF1)) {
+		current_clock++;
+		if((current_clock % CLOCK_CONF_SECOND) == 0) {
+			seconds++;
+#if BLINK_SECONDS
+			leds_toggle(LEDS_GREEN);
+#endif
+		}
+		
+		if(etimer_pending() &&
+		   (etimer_next_expiration_time() - current_clock - 1) > MAX_TICKS) {
+ 			etimer_request_poll();
+ 		}
+
+
+		/* clear the compare flags */
+		clear_bit(*TMR(0,SCTRL),TCF);                
+		clear_bit(*TMR(0,CSCTRL),TCF1);                
+		clear_bit(*TMR(0,CSCTRL),TCF2);                
+		return;
+	} else {
+		/* this timer didn't create an interrupt condition */
+		return;
+	}
+}
+
+clock_time_t
+clock_time(void)
+{
+  return current_clock;
+}
+
+unsigned long
+clock_seconds(void)
+{
+	return seconds;
+}
+
+/* clock delay from cc2430 */
+/* I don't see any documentation about how this routine is suppose to behave */
+void
+clock_delay(unsigned int len)
+{
+  unsigned int i;
+  for(i = 0; i< len; i++) {
+	  asm("nop");
+  }
+}