/*******************************************************************************
* DISCLAIMER
* This software is supplied by Renesas Electronics Corporation and is only
* intended for use with Renesas products. No other uses are authorized. This
* software is owned by Renesas Electronics Corporation and is protected under
* all applicable laws, including copyright laws.
* THIS SOFTWARE IS PROVIDED "AS IS" AND RENESAS MAKES NO WARRANTIES REGARDING
* THIS SOFTWARE, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING BUT NOT
* LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
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* ELECTRONICS CORPORATION NOR ANY OF ITS AFFILIATED COMPANIES SHALL BE LIABLE
* FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR
* ANY REASON RELATED TO THIS SOFTWARE, EVEN IF RENESAS OR ITS AFFILIATES HAVE
* BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
* Renesas reserves the right, without notice, to make changes to this software
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* you agree to the additional terms and conditions found by accessing the
* following link:
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* (c) 2014 Renesas Electronics Corporation All rights reserved.
*******************************************************************************/


/******************************************************************************
* File Name     : r_wdt.c
* Version       : 1.0
* Device(s)     : R7F701035xAFP RH850/F1L
* Tool-Chain    : IAR Embedded Workbench 1.20.1
* Description   : This file is a sample of the window watchdog timer setting.
* Operation     : -
*******************************************************************************
*******************************************************************************
* History       : DD.MM.YYYY Version Description
*               : 20.03.2014 1.00    First Release
******************************************************************************/

/******************************************************************************
Includes <System Includes>
******************************************************************************/
#include    "r_typedefs.h"
#include    "iodefine.h"
#ifdef __ghs__
#include    "device.h"
#endif

#ifdef __IAR_SYSTEMS_ICC__
	#include <intrinsics.h>
#endif




/******************************************************************************
Imported global variables and functions (from other files)
******************************************************************************/


/******************************************************************************
Macro definitions
******************************************************************************/


/******************************************************************************
Exported global variables and functions (to be accessed by other files)
******************************************************************************/
        void    R_WDT_Init( void );
        void    R_WDT_Clear( void );


/******************************************************************************
Private global variables and functions
******************************************************************************/


/******************************************************************************
* Function Name : void R_WDT_Init( void )
* Description   : This function initializes WDT.
* Argument      : none
* Return Value  : none
******************************************************************************/
void R_WDT_Init( void )
{
    uint32_t  reg32_value;

    /* Set interrupt flags */
    MKWDTA0                       = 1U;
    RFWDTA0                       = 0U;
    TBWDTA0                       = 0U;


    /* Source Clock Setting for C_AWO_WDTA
    CKSC_AWDTAD_CTL - C_AWO_WDTA Source Clock Selection Register
    b31:b 2                       - Reserved set to 0
    b 1:b 0           AWDTADCSID  - Source Clock Setting for C_AWO_WDTA  - LS IntOsc fRL (240 kHz) / 128  */
    do
    {
        reg32_value               = 0x00000001UL;
        PROTCMD0                  = 0x000000A5UL;     /* Protection release the CKSC_AWDTAD_CTL register. */
        CKSC_AWDTAD_CTL           = reg32_value;
        CKSC_AWDTAD_CTL           = ~reg32_value;
        CKSC_AWDTAD_CTL           = reg32_value;
    } while ( PROTS0 != 0x00000000UL );
    while ( CKSC_AWDTAD_ACT != reg32_value )
    {
        /* Waiting for CKSC_AWDTAD_CTL to set. */
    }


    /* Set a mode of WDT
    WDTAnMD         - WDTA Mode Register
    b7                            - Reserved set to 0
    b6:b4             WDTAnOVF    - Selects the overflow interval time  - 512 / WDTATCKI
                                                                          WDTATCKI = fRL(240 kHz) / 128  = 1,875Hz
                                                                          overflow = 512 / WDTATCKI      = 273ms
    b3                WDTAnWIE    - Enables/disables the 75% interrupt
                                    request INTWDTAn.                   - INTWDTAn enabled
    b2                WDTAnERM    - Specifies the error mode.           - Reset mode
    b1:b0             WDTAnWS     - Selects the window-open period.     - 100% */
    WDTA0.MD                      = 0x0FU;


    MKWDTA0                       = 0U;        /* INTWDTA0 (75% interrupt) enable */
}


/******************************************************************************
* Function Name : void R_WDT_Clear( void )
* Description   : This function clears WDT.
* Argument      : none
* Return Value  : none
******************************************************************************/
void R_WDT_Clear( void )
{
    /* Set a mode of WDT
    WDTAnEVAC       - WDTA Enable VAC Register
    b7:b0             WDTAnEVAC   - Control the start / restart of the WDTAn count. */
    WDTA0.EVAC                    = ( 0xAC - WDTA0.REF );          /* start & clear */
}