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// File: watchdog_sw_rst.c

//// Samsung SMDK6410 SW_RST using watchdog timer support code.//#include <windows.h>#include <ceddk.h>#include <oal.h>#include <s3c6410.h>// WTCON - control register, bit specifications#define WTCON_PRESCALE(x) (((x)&0xff)<<8) // bit 15:8, prescale value, 0 <= (x) <= 27#define WTCON_ENABLE (1<<5) // bit 5, enable watchdog timer#define WTCON_CLK_DIV16 (0<<3)#define WTCON_CLK_DIV32 (1<<3)#define WTCON_CLK_DIV64 (2<<3)#define WTCON_CLK_DIV128 (3<<3)#define WTCON_INT_ENABLE (1<<2)#define WTCON_RESET (1<<0)// WTCNT - watchdog counter register#define WTCNT_CNT(x) ((x)&0xffff)// WTDAT - watchdog reload value register#define WTDAT_CNT(x) ((x)&0xffff)// WTCLRINT - watchdog interrupt clear register#define WTCLRINT_CLEAR (1<<0)// Watchdog Clock// PCLK : 66MHz// PCLK/PRESCALER : 66/66 = 1MHz// PCLK/PRESCALER/DIVIDER : 1MHz/128 = 7.812 KHz// MAX Counter = 0xffff = 65535// Period = 65535/7812 =~ 8.4 sec#define WD_PRESCALER (66-1)//------------------------------------------------------------------------------//// Function: _OEMSWReset//// This is the function to reset S3C6410 using watchdog timer.//void _OEMSWReset(void){   volatile S3C6410_WATCHDOG_REG *pWTDogReg = NULL; // VA for Watchdog base  pWTDogReg = (S3C6410_WATCHDOG_REG *)OALPAtoVA(S3C6410_BASE_REG_PA_WATCHDOG, FALSE);  if (!pWTDogReg)  {   OALMSG (OAL_ERROR, (L"Address of Watch Dog Base Not Defined, WatchDog not enabled!/r/n"));  }  else  {   pWTDogReg->WTCON = WTCON_PRESCALE(WD_PRESCALER) | WTCON_CLK_DIV128 | WTCON_RESET;  pWTDogReg->WTDAT = WTDAT_CNT(0x1);  pWTDogReg->WTCNT = WTCNT_CNT(0x1);  pWTDogReg->WTCON |= WTCON_ENABLE;  }}相关帖子：

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