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| author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2011-08-12 22:10:48 +0000 |
|---|---|---|
| committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2011-08-12 22:10:48 +0000 |
| commit | d212c46891d73fec2a1bbc4069d5fecfc360b8f1 (patch) | |
| tree | 401de244f5464fd9d593cc676395702d0510f915 /nuttx/arch/arm/src/kinetis/kinetis_idle.c | |
| parent | 8e8fff821c980d0f4c5577367395b9c309383bbf (diff) | |
| download | px4-nuttx-d212c46891d73fec2a1bbc4069d5fecfc360b8f1.tar.gz px4-nuttx-d212c46891d73fec2a1bbc4069d5fecfc360b8f1.tar.bz2 px4-nuttx-d212c46891d73fec2a1bbc4069d5fecfc360b8f1.zip | |
Add Kinesis watchdog, ramfuncs, idle loop, start of clock configuration
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3875 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/arm/src/kinetis/kinetis_idle.c')
| -rwxr-xr-x | nuttx/arch/arm/src/kinetis/kinetis_idle.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/kinetis/kinetis_idle.c b/nuttx/arch/arm/src/kinetis/kinetis_idle.c new file mode 100755 index 000000000..8fc914f3f --- /dev/null +++ b/nuttx/arch/arm/src/kinetis/kinetis_idle.c @@ -0,0 +1,104 @@ +/****************************************************************************
+ * arch/arm/src/kinetis/kinetis_idle.c
+ *
+ * Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 NuttX 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 COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <arch/board/board.h>
+#include <nuttx/config.h>
+
+#include <nuttx/arch.h>
+#include "up_internal.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Does the board support an IDLE LED to indicate that the board is in the
+ * IDLE state?
+ */
+
+#if defined(CONFIG_ARCH_LEDS) && defined(LED_IDLE)
+# define BEGIN_IDLE() up_ledon(LED_IDLE)
+# define END_IDLE() up_ledoff(LED_IDLE)
+#else
+# define BEGIN_IDLE()
+# define END_IDLE()
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_idle
+ *
+ * Description:
+ * up_idle() is the logic that will be executed when their is no other
+ * ready-to-run task. This is processor idle time and will continue until
+ * some interrupt occurs to cause a context switch from the idle task.
+ *
+ * Processing in this state may be processor-specific. e.g., this is where
+ * power management operations might be performed.
+ *
+ ****************************************************************************/
+
+void up_idle(void)
+{
+#if defined(CONFIG_SUPPRESS_INTERRUPTS) || defined(CONFIG_SUPPRESS_TIMER_INTS)
+ /* If the system is idle and there are no timer interrupts, then process
+ * "fake" timer interrupts. Hopefully, something will wake up.
+ */
+
+ sched_process_timer();
+#else
+
+ /* Sleep until an interrupt occurs to save power */
+
+ BEGIN_IDLE();
+ asm("WFI");
+ END_IDLE();
+#endif
+}
+
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