From: asterix <asterix@38d2e660-2303-0410-9eaa-f027e97ec537>
Date: Mon, 1 Dec 2008 18:34:57 +0000 (+0000)
Subject: Add the wdt avr cpu specific.
X-Git-Tag: 2.1.0~732
X-Git-Url: https://codewiz.org/gitweb?a=commitdiff_plain;h=b217309e0b56c7d9f69e6c80cf01b313489b1fd4;hp=d46fdbe9563676fb4d68a3ed096fd2ba1a826b2e;p=bertos.git

Add the wdt avr cpu specific.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@1950 38d2e660-2303-0410-9eaa-f027e97ec537
---

diff --git a/bertos/cpu/avr/drv/wdt_avr.h b/bertos/cpu/avr/drv/wdt_avr.h
new file mode 100644
index 00000000..109390eb
--- /dev/null
+++ b/bertos/cpu/avr/drv/wdt_avr.h
@@ -0,0 +1,100 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief Watchdog interface for AVR architecture.
+ *
+ * \version $Id$
+ *
+ * \author Daniele Basile <asterix@develer.com>
+ *
+ */
+
+#ifndef DRV_WDT_AVR_H
+#define DRV_WDT_AVR_H
+
+#include "cfg/cfg_wdt.h"
+
+#include <cfg/compiler.h> // INLINE
+
+#include <avr/io.h>
+
+#if CPU_AVR_ATMEGA1281
+	#define WDT_CRTL_REG WDTCSR
+#else
+	#define WDT_CRTL_REG WDTCR
+#endif
+
+/**
+ * Reset the watchdog timer.
+ */
+INLINE void wdt_reset(void)
+{
+	__asm__ __volatile__ ("wdr");
+}
+
+INLINE void wdt_enable(bool flag)
+{
+	IRQ_DISABLE;
+	if (flag)
+	{
+		WDT_CRTL_REG |= BV(WDE);
+	}
+	else
+	{
+		WDT_CRTL_REG |= BV(WDCE) | BV(WDE);
+		WDT_CRTL_REG &= ~BV(WDE);
+	}
+	IRQ_ENABLE;
+}
+
+/**
+ * Set watchdog timeout.
+ */
+INLINE void wdt_setTimeout(uint32_t timeout)
+{
+	IRQ_DISABLE;
+	wdt_reset();
+	WDT_CRTL_REG |= BV(WDCE) | BV(WDE);
+	WDT_CRTL_REG = timeout;
+	IRQ_ENABLE;
+}
+
+/**
+ * Init watchdog timer.
+ */
+INLINE void wdt_init(void)
+{
+	WDT_CRTL_REG |= BV(WDCE) | BV(WDE);
+}
+
+
+#endif /* DRV_WDT_AVR_H */