/*****************************************************************************
* wdt.h: Header file for NXP LPC214x Family Microprocessors
*
* Copyright© 2006, NXP Semiconductor
* All rights reserved.
*
* History
* 2006.09.01 ver 1.00 Prelimnary version, first Release
*
******************************************************************************/
#ifndef __WDT_H
#define __WDT_H

#define WDEN 0x00000001
#define WDRESET 0x00000002
#define WDTOF 0x00000004
#define WDINT 0x00000008


#define WDT_CLK_SRC_RC 0 //RC - 4MHz
#define WDT_CLK_SRC_APB 1 //APB (system)
#define WDT_CLK_SRC_RTC 2 //RTC - 32768

#define WDT_CLK_SRC WDT_CLK_SRC_RC

#define WDT_PERIOD 2000ull //период в mS
#define WDT_CLK 4000000ull //частота RC-цепочки


#define WDT_FEED_VALUE (WDT_PERIOD*WDT_CLK)/(1000ull*4ull) // /1000 - перевод в сеунды, /4 - предделитель


#endif /* end __WDT_H */
/*****************************************************************************
** End Of File
******************************************************************************/

/*****************************************************************************
* wdt.c: Watchdog C file for NXP LPC23xx/24xx Family Microprocessors
*
* Copyright© 2006, NXP Semiconductor
* All rights reserved.
*
* History
* 2006.07.20 ver 1.00 Prelimnary version, first Release
*
*****************************************************************************/

//volatile unsigned int wdt_counter;

/*****************************************************************************
** Function name: WDTHandler
**
** Descriptions: Watchdog timer interrupt handler
**
** parameters: None
** Returned value: None
**
*****************************************************************************/
//__irq __nested __arm void WDTHandler (void)
//{
// WDMOD &= ~WDTOF; /* clear the time-out interrupt flag */

// __enable_interrupt(); /* handles nested interrupt */

// wdt_counter++;

// VICADDRESS = 0; /* Acknowledge Interrupt */
//}

/*****************************************************************************
** Function name: WDTInit
**
** Descriptions: Initialize watchdog timer, install the
** watchdog timer interrupt handler
**
** parameters: None
** Returned value: true or false, return false if the VIC table
** is full and WDT interrupt handler can be
** installed.
**
*****************************************************************************/
void WDTInit( void )
{
WDTC = WDT_FEED_VALUE; /* once WDEN is set, the WDT will start after feeding */
WDCLKSEL = WDT_CLK_SRC;
WDMOD = WDEN | WDRESET;

WDFEED = 0xAA; /* Feeding sequence */
WDFEED = 0x55;
}

/*****************************************************************************
** Function name: WDTFeed
**
** Descriptions: Feed watchdog timer to prevent it from timeout
**
** parameters: None
** Returned value: None
**
*****************************************************************************/
void WDTFeed( void )
{
WDFEED = 0xAA; /* Feeding sequence */
WDFEED = 0x55;
return;
}

void wdtReset(void)
{
WDTFeed();
}

void wdtReboot(void)
{
__disable_interrupt();
while(1);
}

/******************************************************************************
** End Of File
******************************************************************************/

WDFEED = 0xAA;
WDFEED = 0x55;

{
    WDMOD=3; WDFEED = 0xAA; WDFEED = 0x55;
    WDFEED = 0xAA; WDFEED = 0x00;
    while(1);
}