New DevLib module.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@259 38d2e660-2303-0410-9eaa-f027e97ec537

diff --git a/drv/wdt.h b/drv/wdt.h
new file mode 100755 (executable)
index 0000000..617cc0b
--- /dev/null
+++ b/drv/wdt.h
@@ -0,0 +1,71 @@
+/*!
+ * \file
+ * <!--
+ * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
+ * This file is part of DevLib - See devlib/README for information.
+ * -->
+ *
+ * \version $Id$
+ *
+ * \author Bernardo Innocenti <bernie@develer.com>
+ *
+ * \brief Watchdog interface
+ */
+
+/*#*
+ *#* $Log$
+ *#* Revision 1.1  2004/10/26 08:34:47  bernie
+ *#* New DevLib module.
+ *#*
+ *#*/
+#ifndef DRV_WDT_H
+#define DRV_WDT_H
+
+#include <avr/io.h>
+#include <compiler.h>
+#include <cpu.h>
+#include <macros.h> // BV()
+
+/*!
+ * Reset the watchdog timer.
+ */
+INLINE void wdt_reset(void)
+{
+       __asm__ __volatile__ ("wdr");
+}
+
+/*!
+ * Set watchdog timer timeout.
+ *
+ * \param timeout  0: 16.3ms, 7: 2.1s
+ */
+INLINE void wdt_init(uint8_t timeout)
+{
+#if CPU_AVR
+       WDTCR |= BV(WDCE) | BV(WDE);
+       WDTCR = timeout;
+#else
+       #error unknown CPU
+#endif
+}
+
+INLINE void wdt_start(void)
+{
+#if CPU_AVR
+       WDTCR |= BV(WDE);
+#else
+       #error unknown CPU
+#endif
+}
+
+INLINE void wdt_stop(void)
+{
+#if CPU_AVR
+       WDTCR |= BV(WDCE) | BV(WDE);
+       WDTCR &= ~BV(WDE);
+#else
+       #error unknown CPU
+#endif
+}
+
+#endif /* DRV_WDT_H */