Refactor BeRTOS to be in his own directory.

[bertos.git] / bertos / drv / wdt.h

diff --git a/bertos/drv/wdt.h b/bertos/drv/wdt.h
new file mode 100644 (file)
index 0000000..1db1053
--- /dev/null
+++ b/bertos/drv/wdt.h
@@ -0,0 +1,166 @@
+/**
+ * \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/)
+ *
+ * -->
+ *
+ * \version $Id$
+ *
+ * \author Bernardo Innocenti <bernie@develer.com>
+ *
+ * \brief Watchdog interface
+ */
+
+#ifndef DRV_WDT_H
+#define DRV_WDT_H
+
+#include <appconfig.h>
+#include <cfg/compiler.h> // INLINE
+#include <cfg/arch_config.h>
+
+/* Configury sanity check */
+#if !defined(CONFIG_WATCHDOG) || (CONFIG_WATCHDOG != 0 && CONFIG_WATCHDOG != 1)
+       #error CONFIG_WATCHDOG must be defined to either 0 or 1
+#endif
+
+#if CONFIG_WATCHDOG
+       #include <cpu/detect.h>
+       #include <cfg/os.h>
+
+       #if OS_QT
+               #if _QT < 4
+                       #include <qapplication.h>
+               #else
+                       #include <QtGui/QApplication>
+               #endif
+       #elif OS_POSIX
+               #include <sys/select.h>
+       #elif CPU_AVR
+               #include <avr/io.h>
+               #include <cfg/macros.h> // BV()
+               #if CPU_AVR_ATMEGA1281  // Name is different in atmega1281
+                       #define WDTCR WDTCSR
+               #endif
+       #elif defined(ARCH_FREERTOS) && (ARCH & ARCH_FREERTOS)
+               #include <task.h> /* taskYIELD() */
+       #else
+               #error unknown CPU
+       #endif
+#endif /* CONFIG_WATCHDOG */
+
+/**
+ * Reset the watchdog timer.
+ */
+INLINE void wdt_reset(void)
+{
+#if CONFIG_WATCHDOG
+       #if OS_QT
+               // Let Qt handle events
+               ASSERT(qApp);
+               qApp->processEvents();
+       #elif OS_POSIX
+               static struct timeval tv = { 0, 0 };
+               select(0, NULL, NULL, NULL, &tv);
+       #elif defined(ARCH_FREERTOS) && (ARCH & ARCH_FREERTOS)
+               vTaskDelay(1);
+       #elif CPU_AVR
+               __asm__ __volatile__ ("wdr");
+       #else
+               #error unknown CPU
+       #endif
+#endif /* CONFIG_WATCHDOG */
+}
+
+/**
+ * Set watchdog timer timeout.
+ *
+ * \param timeout  0: 16.3ms, 7: 2.1s
+ */
+INLINE void wdt_init(uint8_t timeout)
+{
+#if CONFIG_WATCHDOG
+       #if OS_QT
+               // Create a dummy QApplication object
+               if (!qApp)
+               {
+                       int argc;
+                       new QApplication(argc, (char **)NULL);
+               }
+               (void)timeout;
+       #elif OS_POSIX
+               (void)timeout; // NOP
+       #elif defined(ARCH_FREERTOS) && (ARCH & ARCH_FREERTOS)
+               /* nop */
+       #elif CPU_AVR
+               WDTCR |= BV(WDCE) | BV(WDE);
+               WDTCR = timeout;
+       #else
+               #error unknown CPU
+       #endif
+#else
+       (void)timeout;
+#endif /* CONFIG_WATCHDOG */
+}
+
+INLINE void wdt_start(void)
+{
+#if CONFIG_WATCHDOG
+       #if OS_QT
+               // NOP
+       #elif OS_POSIX
+               // NOP
+       #elif defined(ARCH_FREERTOS) && (ARCH & ARCH_FREERTOS)
+               /* nop */
+       #elif CPU_AVR
+               WDTCR |= BV(WDE);
+       #else
+               #error unknown CPU
+       #endif
+#endif /* CONFIG_WATCHDOG */
+}
+
+INLINE void wdt_stop(void)
+{
+#if CONFIG_WATCHDOG
+       #if OS_QT
+               // NOP
+       #elif OS_POSIX
+               // NOP
+       #elif defined(ARCH_FREERTOS) && (ARCH & ARCH_FREERTOS)
+               /* nop */
+       #elif CPU_AVR
+               WDTCR |= BV(WDCE) | BV(WDE);
+               WDTCR &= ~BV(WDE);
+       #else
+               #error unknown CPU
+       #endif
+#endif /* CONFIG_WATCHDOG */
+}
+
+#endif /* DRV_WDT_H */