wwdt_11xx.h

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/*
 * @brief LPC11xx WWDT chip driver
 *
 * @note
 * Copyright(C) NXP Semiconductors, 2012
 * All rights reserved.
 *
 * @par
 * Software that is described herein is for illustrative purposes only
 * which provides customers with programming information regarding the
 * LPC products.  This software is supplied "AS IS" without any warranties of
 * any kind, and NXP Semiconductors and its licensor disclaim any and
 * all warranties, express or implied, including all implied warranties of
 * merchantability, fitness for a particular purpose and non-infringement of
 * intellectual property rights.  NXP Semiconductors assumes no responsibility
 * or liability for the use of the software, conveys no license or rights under any
 * patent, copyright, mask work right, or any other intellectual property rights in
 * or to any products. NXP Semiconductors reserves the right to make changes
 * in the software without notification. NXP Semiconductors also makes no
 * representation or warranty that such application will be suitable for the
 * specified use without further testing or modification.
 *
 * @par
 * Permission to use, copy, modify, and distribute this software and its
 * documentation is hereby granted, under NXP Semiconductors' and its
 * licensor's relevant copyrights in the software, without fee, provided that it
 * is used in conjunction with NXP Semiconductors microcontrollers.  This
 * copyright, permission, and disclaimer notice must appear in all copies of
 * this code.
 */
 
#ifndef __WWDT_11XX_H_
#define __WWDT_11XX_H_
 
#ifdef __cplusplus
extern "C" {
#endif
 
#if !defined(CHIP_LPC11CXX) || defined(CHIP_LPC1125)
#define WATCHDOG_WINDOW_SUPPORT
#endif
 
#if defined(CHIP_LPC11AXX) || defined(CHIP_LPC11EXX) || defined(CHIP_LPC11UXX)
#define WATCHDOG_CLKSEL_SUPPORT
#endif
 
typedef struct {                                
        __IO uint32_t  MOD;                     
        __IO uint32_t  TC;                      
        __O  uint32_t  FEED;            
        __I  uint32_t  TV;                      
#ifdef WATCHDOG_CLKSEL_SUPPORT
        __IO uint32_t CLKSEL;           
#else
        __I  uint32_t  RESERVED0;
#endif
#ifdef WATCHDOG_WINDOW_SUPPORT
        __IO uint32_t  WARNINT;         
        __IO uint32_t  WINDOW;          
#endif
} LPC_WWDT_T;
 
#define WWDT_WDMOD_BITMASK          ((uint32_t) 0x1F)
 
#define WWDT_WDMOD_WDEN             ((uint32_t) (1 << 0))
 
#define WWDT_WDMOD_WDRESET          ((uint32_t) (1 << 1))
 
#define WWDT_WDMOD_WDTOF            ((uint32_t) (1 << 2))
 
#define WWDT_WDMOD_WDINT            ((uint32_t) (1 << 3))
 
#define WWDT_WDMOD_WDPROTECT        ((uint32_t) (1 << 4))
 
void Chip_WWDT_Init(LPC_WWDT_T *pWWDT);
 
void Chip_WWDT_DeInit(LPC_WWDT_T *pWWDT);
 
STATIC INLINE void Chip_WWDT_SetTimeOut(LPC_WWDT_T *pWWDT, uint32_t timeout)
{
        pWWDT->TC = timeout;
}
 
STATIC INLINE void Chip_WWDT_Feed(LPC_WWDT_T *pWWDT)
{
        pWWDT->FEED = 0xAA;
        pWWDT->FEED = 0x55;
}
 
#if defined(WATCHDOG_WINDOW_SUPPORT)
 
STATIC INLINE void Chip_WWDT_SetWarning(LPC_WWDT_T *pWWDT, uint32_t timeout)
{
        pWWDT->WARNINT = timeout;
}
 
STATIC INLINE void Chip_WWDT_SetWindow(LPC_WWDT_T *pWWDT, uint32_t timeout)
{
        pWWDT->WINDOW = timeout;
}
 
#endif
 
STATIC INLINE void Chip_WWDT_SetOption(LPC_WWDT_T *pWWDT, uint32_t options)
{
        pWWDT->MOD |= options;
}
 
STATIC INLINE void Chip_WWDT_UnsetOption(LPC_WWDT_T *pWWDT, uint32_t options)
{
        pWWDT->MOD &= (~options) & WWDT_WDMOD_BITMASK;
}
 
STATIC INLINE void Chip_WWDT_Start(LPC_WWDT_T *pWWDT)
{
        Chip_WWDT_SetOption(pWWDT, WWDT_WDMOD_WDEN);
        Chip_WWDT_Feed(pWWDT);
}
 
STATIC INLINE uint32_t Chip_WWDT_GetStatus(LPC_WWDT_T *pWWDT)
{
        return pWWDT->MOD;
}
 
void Chip_WWDT_ClearStatusFlag(LPC_WWDT_T *pWWDT, uint32_t status);
 
STATIC INLINE uint32_t Chip_WWDT_GetCurrentCount(LPC_WWDT_T *pWWDT)
{
        return pWWDT->TV;
}
 
#if defined(WATCHDOG_CLKSEL_SUPPORT)
 
#define WWDT_CLKSEL_BITMASK         ((uint32_t) 0x10000003)
 
#define WWDT_CLKSEL_SOURCE(n)       ((uint32_t) (n & 0x03))
 
#define WWDT_CLKSEL_LOCK            ((uint32_t) (1 << 31))
 
typedef enum {
        WWDT_CLKSRC_IRC = WWDT_CLKSEL_SOURCE(0),                                
        WWDT_CLKSRC_WATCHDOG_WDOSC = WWDT_CLKSEL_SOURCE(1),             
} CHIP_WWDT_CLK_SRC_T;
 
STATIC INLINE void Chip_WWDT_SelClockSource(LPC_WWDT_T *pWWDT, CHIP_WWDT_CLK_SRC_T wdtClkSrc)
{
        pWWDT->CLKSEL = wdtClkSrc & WWDT_CLKSEL_BITMASK;
}
 
#endif
 
#ifdef __cplusplus
}
#endif
 
#endif /* __WWDT_11XX_H_ */