diff options
Diffstat (limited to 'nuttx/arch/arm/src/kinetis/kinetis_wdog.c')
-rw-r--r-- | nuttx/arch/arm/src/kinetis/kinetis_wdog.c | 234 |
1 files changed, 117 insertions, 117 deletions
diff --git a/nuttx/arch/arm/src/kinetis/kinetis_wdog.c b/nuttx/arch/arm/src/kinetis/kinetis_wdog.c index 9ba49306f..19b6b1d59 100644 --- a/nuttx/arch/arm/src/kinetis/kinetis_wdog.c +++ b/nuttx/arch/arm/src/kinetis/kinetis_wdog.c @@ -1,117 +1,117 @@ -/****************************************************************************
- * arch/arm/src/kinetis/kinetis_wdog.c
- * arch/arm/src/chip/kinetis_wdog.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 <nuttx/config.h>
-
-#include <arch/irq.h>
-
-#include "up_arch.h"
-#include "kinetis_internal.h"
-#include "kinetis_wdog.h"
-
-/****************************************************************************
- * Private Definitions
- ****************************************************************************/
-
-/****************************************************************************
- * Private Data
- ****************************************************************************/
-
-/****************************************************************************
- * Public Data
- ****************************************************************************/
-
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: kinetis_wdunlock
- *
- * Description:
- * Watchdog timer unlock routine. Writing 0xc520 followed by 0xd928 will
- * unlock the write once registers in the WDOG so they are writable
- * within the WCT period.
- *
- ****************************************************************************/
-
-static void kinetis_wdunlock(void)
-{
- irqstate_t flags;
-
- /* This sequence must execute within 20 clock cycles. Disable interrupts
- * to assure that the following steps are atomic.
- */
-
- flags = irqsave();
-
- /* Write 0xC520 followed by 0xD928 to the unlock register */
-
- putreg16(0xc520, KINETIS_WDOG_UNLOCK);
- putreg16(0xd928, KINETIS_WDOG_UNLOCK);
- irqrestore(flags);
-}
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: kinetis_wddisable
- *
- * Description:
- * Disable the watchdog timer
- *
- ****************************************************************************/
-
-void kinetis_wddisable(void)
-{
- uint16_t regval;
-
- /* Unlock the watchdog so that we can write to registers */
-
- kinetis_wdunlock();
-
- /* Clear the WDOGEN bit to disable the watchdog */
-
- regval = getreg16(KINETIS_WDOG_STCTRLH);
- regval &= ~WDOG_STCTRLH_WDOGEN;
- putreg16(regval, KINETIS_WDOG_STCTRLH);
-}
+/**************************************************************************** + * arch/arm/src/kinetis/kinetis_wdog.c + * arch/arm/src/chip/kinetis_wdog.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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 <nuttx/config.h> + +#include <arch/irq.h> + +#include "up_arch.h" +#include "kinetis_internal.h" +#include "kinetis_wdog.h" + +/**************************************************************************** + * Private Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: kinetis_wdunlock + * + * Description: + * Watchdog timer unlock routine. Writing 0xc520 followed by 0xd928 will + * unlock the write once registers in the WDOG so they are writable + * within the WCT period. + * + ****************************************************************************/ + +static void kinetis_wdunlock(void) +{ + irqstate_t flags; + + /* This sequence must execute within 20 clock cycles. Disable interrupts + * to assure that the following steps are atomic. + */ + + flags = irqsave(); + + /* Write 0xC520 followed by 0xD928 to the unlock register */ + + putreg16(0xc520, KINETIS_WDOG_UNLOCK); + putreg16(0xd928, KINETIS_WDOG_UNLOCK); + irqrestore(flags); +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: kinetis_wddisable + * + * Description: + * Disable the watchdog timer + * + ****************************************************************************/ + +void kinetis_wddisable(void) +{ + uint16_t regval; + + /* Unlock the watchdog so that we can write to registers */ + + kinetis_wdunlock(); + + /* Clear the WDOGEN bit to disable the watchdog */ + + regval = getreg16(KINETIS_WDOG_STCTRLH); + regval &= ~WDOG_STCTRLH_WDOGEN; + putreg16(regval, KINETIS_WDOG_STCTRLH); +} |