csp_wd.c

IAR 平台ATMEL 的例程, 和说明

/*-----------------------------------------------------------------------------
*   EUROPE TECHNOLOGIES Software Support
*------------------------------------------------------------------------------
* The software is delivered "AS IS" without warranty or condition of any
* kind, either express, implied or statutory. This includes without
* limitation any warranty or condition with respect to merchantability or
* fitness for any particular purpose, or against the infringements of
* intellectual property rights of others.
*------------------------------------------------------------------------------
*
* File Name       : csp_wd.c
* Description     : Function declarations for WatchDog management
* Library Version : 1.01
* Module Version  : 1.XX
*
*       +----- (NEW | MODify | ADD | DELete)                                 
*       |                                                                    
*  No   |   When       Who                What               
*-----+---+----------+------------------+--------------------------------------
* 000  NEW  01/05/99   Patrice VILCHEZ    Creation
* 001  MOD  01/04/01   Olivier MAZUYER    Clean up
* 002  MOD  08/06/01   Frederic SAMSON    Clean Up 
* 003  MOD  30/10/01   Christophe GARDIN  Clean Up
* 004  MOD  18/07/02   Christophe GARDIN  Add pending_mode in CSP_WDInit function
* 005  MOD  23/09/02   Christophe GARDIN  Fix bug on WDInit and WDDisable functions
-----------------------------------------------------------------------------*/

/******************************************************************************
* Include Files
******************************************************************************/
#include "csp.h"


/******************************************************************************
****************************  F U N C T I O N S  ******************************
******************************************************************************/

/******************************************************************************
* Function          : CSP_WDInit
* Description       : Configure the WD module mode 
* Inputs            : <*wd>  = Pointer to WD structure
*                     <mode> = Configure the mode of running and especially 
*                              the clock selection
*                     <overflow_mode> = Configure the WatchDog Overflow Mode
*                   : <pending_mode>  = Configure the WatchDog Pending Window Mode
* Functions called  : None
* Returns           : None
******************************************************************************/
void CSP_WDInit(CSP_WD_T *const wd, U32_T mode, U32_T overflow_mode, U32_T pending_mode)
{
   /* Define Clock and WD Pending Window */
   CSP_WD_SET_MR(wd, (CKEY_ALLOW | mode));
   CSP_WD_SET_PWR(wd, (PWKEY_ALLOW | pending_mode));

   /* Set Overflow Mode */
   CSP_WD_SET_OMR(wd, (OKEY_ALLOW | overflow_mode));
}


/******************************************************************************
* Function          : CSP_WDConfigInterrupt
* Description       : Configure WD Interrupts
* Inputs            : <*wd>      = Pointer to WD structure
*                     <int_mode> = Configure the priority level and source type
*                     <int_mask> = Configure which interrupt bits are activated
*                     <callback> = Function called through the assembler interrupt handler
* Functions called  : CSP_GET_INTERRUPT_NUMBER, CSP_GICConfigInterrupt
* Returns           : None
******************************************************************************/
void CSP_WDConfigInterrupt(CSP_WD_T *const wd, 
                           U32_T int_mode, 
                           U32_T int_mask, 
                           U32_T callback)
{
   /* Local Variables */
   U8_T int_num = 0;

   /* Get Peripheral Interrupt Number */
   int_num = CSP_GET_INTERRUPT_NUMBER(wd);

   /* Disable all interrupt */
   CSP_WD_SET_IDR(wd, 0xFFFFFFFF);
   
   /* Interrupt always Enable */
   CSP_WD_SET_IER(wd, int_mask);

   /* Configure WD controller interrupt mode in GIC module */
   CSP_GICConfigInterrupt(int_num, int_mode, callback);
}


/******************************************************************************
* Function          : CSP_WDEnable
* Description       : Enable WatchDog
* Inputs            : <*wd> = Pointer to WD structure
* Functions called  : None
* Returns           : None
******************************************************************************/
void CSP_WDEnable(CSP_WD_T *const wd)
{
   /* Write Access Allowed in MR + Enable WatchDog */
   CSP_WD_SET_OMR(wd, (CSP_WD_GET_OMR(wd) | (OKEY_ALLOW | WDEN)));
}


/******************************************************************************
* Function          : CSP_WDDisable
* Description       : Disable WatchDog
* Inputs            : <*wd> = Pointer to WD structure
* Functions called  : None
* Returns           : None
******************************************************************************/
void CSP_WDDisable(CSP_WD_T *const wd)
{
   /* Write Access Allowed in MR + Disable WatchDog */
   CSP_WD_SET_OMR(wd, ((CSP_WD_GET_OMR(wd) & (~WDEN)) | OKEY_ALLOW));
}


/******************************************************************************
* Function          : CSP_WDCounterRestart
* Description       : Restart Watchdog Counter
* Inputs            : <*wd> = Pointer to WD structure
* Functions called  : None
* Returns           : None
******************************************************************************/
void CSP_WDCounterRestart(CSP_WD_T *const wd)
{
   /* Restart Key */
   CSP_WD_SET_CR(wd, RSTKEY);
}