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/************************************************************************************
* arch/arm/src/lpc17xx/chip/lpc17_wdt.h
*
* Copyright (C) 2010, 2013 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.
*
************************************************************************************/
#ifndef __ARCH_ARM_SRC_LPC17XX_LPC17_WDT_H
#define __ARCH_ARM_SRC_LPC17XX_LPC17_WDT_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include "chip.h"
#include "chip/lpc17_memorymap.h"
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* Register offsets *****************************************************************/
#define LPC17_WDT_MOD_OFFSET 0x0000 /* Watchdog mode register */
#define LPC17_WDT_TC_OFFSET 0x0004 /* Watchdog timer constant register */
#define LPC17_WDT_FEED_OFFSET 0x0008 /* Watchdog feed sequence register */
#define LPC17_WDT_TV_OFFSET 0x000c /* Watchdog timer value register */
#ifdef LPC176x
# define LPC17_WDT_CLKSEL_OFFSET 0x0010 /* Watchdog clock source selection register */
#endif
#ifdef LPC178x
# define LPC17_WDT_WARNINT_OFFSET 0x0014 /* Watchdog warning interrupt */
# define LPC17_WDT_WINDOW_OFFSET 0x0018 /* Watchdog window compare value */
#endif
/* Register addresses ***************************************************************/
#define LPC17_WDT_MOD (LPC17_WDT_BASE+LPC17_WDT_MOD_OFFSET)
#define LPC17_WDT_TC (LPC17_WDT_BASE+LPC17_WDT_TC_OFFSET)
#define LPC17_WDT_FEED (LPC17_WDT_BASE+LPC17_WDT_FEED_OFFSET)
#define LPC17_WDT_TV (LPC17_WDT_BASE+LPC17_WDT_TV_OFFSET)
#define LPC17_WDT_CLKSEL (LPC17_WDT_BASE+LPC17_WDT_CLKSEL_OFFSET)
#ifdef LPC178x
# define LPC17_WDT_WARNINT (LPC17_WDT_BASE+LPC17_WDT_WARNINT_OFFSET)
# define LPC17_WDT_WINDOW (LPC17_WDT_BASE+LPC17_WDT_WINDOW_OFFSET)
#endif
/* Register bit definitions *********************************************************/
/* Watchdog mode register */
#define WDT_MOD_WDEN (1 << 0) /* Bit 0: Watchdog enable */
#define WDT_MOD_WDRESET (1 << 1) /* Bit 1: Watchdog reset enable */
#define WDT_MOD_WDTOF (1 << 2) /* Bit 2: Watchdog time-out */
#define WDT_MOD_WDINT (1 << 3) /* Bit 3: Watchdog interrupt */
#ifdef LPC178x
# define WDT_MOD_WDPROTECT (1 << 4) /* Bit 4: Watchdog interrupt */
#endif
/* Bits 5-31: Reserved */
/* Watchdog timer constant register */
#ifdef LPC176x
# define WDT_TC (0xffffffff) /* Bits 0-31: Watchdog time-out interval */
#endif
#ifdef LPC178x
# define WDT_TC (0x00ffffff) /* Bits 0-23: Watchdog time-out interval */
/* Bits 24-31: Reserved */
#endif
/* Watchdog feed sequence register */
#define WDT_FEED_MASK (0xff) /* Bits 0-7: Feed value should be 0xaa
* followed by 0x55 */
/* Bits 14-31: Reserved */
/* Watchdog timer value register */
#ifdef LPC176x
# define WDT_TVT (0xffffffff) /* Bits 0-31: Watchdog timer value */
#endif
#ifdef LPC178x
# define WDT_TVT (0xffffff) /* Bits 0-23: Watchdog timer value */
/* Bits 24-31: Reserved */
#endif
/* Watchdog clock source selection register */
#ifdef LPC176x
# define WDT_CLKSEL_WDSEL_SHIFT (0) /* Bits 0-1: Clock source for the Watchdog timer */
# define WDT_CLKSEL_WDSEL_MASK (3 << WDT_CLKSEL_WDSEL_SHIFT)
# define WDT_CLKSEL_WDSEL_INTRC (0 << WDT_CLKSEL_WDSEL_SHIFT) /* Internal RC osc */
# define WDT_CLKSEL_WDSEL_APB (1 << WDT_CLKSEL_WDSEL_SHIFT) /* APB peripheral clock (watchdog pclk) */
# define WDT_CLKSEL_WDSEL_RTC (2 << WDT_CLKSEL_WDSEL_SHIFT) /* RTC oscillator (rtc_clk) */
/* Bits 2-30: Reserved */
# define WDT_CLKSEL_WDLOCK (1 << 31) /* Bit 31: Lock WDT register bits if set */
#endif
/* Watchdog timer warning interrupt register */
#ifdef LPC178x
# define WDT_WARNINT (0x3ff) /* Bits 0-9: Warning Interrupt compare value */
/* Bits 10-31: Reserved */
#endif
/* Watchdog timer value register */
#ifdef LPC178x
# define WDT_WINDOW (0xffffff) /* Bits 0-23: Watchdog window value */
/* Bits 24-31: Reserved */
#endif
/************************************************************************************
* Public Types
************************************************************************************/
/************************************************************************************
* Public Data
************************************************************************************/
/************************************************************************************
* Public Functions
************************************************************************************/
#endif /* __ARCH_ARM_SRC_LPC17XX_LPC17_WDT_H */
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