rt-thread/bsp/nuvoton/libraries/n9h30/Driver/Source/nu_wwdt.c

/**************************************************************************//**
 * @file     wwdt.c
 * @brief    N9H30 WWDT driver source file
 *
 * @note
 * SPDX-License-Identifier: Apache-2.0
 * Copyright (C) 2018 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include "N9H30.h"
#include "nu_sys.h"
#include "nu_wwdt.h"

/** @addtogroup N9H30_Device_Driver N9H30 Device Driver
  @{
*/

/** @addtogroup N9H30_WWDT_Driver WWDT Driver
  @{
*/


/** @addtogroup N9H30_WWDT_EXPORTED_FUNCTIONS WWDT Exported Functions
  @{
*/


/**
 * @brief This function make WWDT module start counting with different counter period and compared window value
 * @param[in] u32PreScale  Prescale period for the WWDT counter period. Valid values are:
 *              - \ref WWDT_PRESCALER_1
 *              - \ref WWDT_PRESCALER_2
 *              - \ref WWDT_PRESCALER_4
 *              - \ref WWDT_PRESCALER_8
 *              - \ref WWDT_PRESCALER_16
 *              - \ref WWDT_PRESCALER_32
 *              - \ref WWDT_PRESCALER_64
 *              - \ref WWDT_PRESCALER_128
 *              - \ref WWDT_PRESCALER_192
 *              - \ref WWDT_PRESCALER_256
 *              - \ref WWDT_PRESCALER_384
 *              - \ref WWDT_PRESCALER_512
 *              - \ref WWDT_PRESCALER_768
 *              - \ref WWDT_PRESCALER_1024
 *              - \ref WWDT_PRESCALER_1536
 *              - \ref WWDT_PRESCALER_2048
 * @param[in] u32CmpValue Window compared value. Valid values are between 0x0 to 0x3F
 * @param[in] u32EnableInt Enable WWDT interrupt or not. Valid values are \ref TRUE and \ref FALSE
 * @return None
 * @note Application can call this function can only once after boot up
 */
void WWDT_Open(UINT u32PreScale, UINT u32CmpValue, UINT u32EnableInt)
{
    UINT reg;
    reg = u32PreScale |
          (u32CmpValue << 16) |
          0x1 | // enable
          (u32EnableInt ? 0x2 : 0);
    outpw(REG_WWDT_CTL, reg);

    return;
}




/*@}*/ /* end of group N9H30_WWDT_EXPORTED_FUNCTIONS */

/*@}*/ /* end of group N9H30_WWDT_Driver */

/*@}*/ /* end of group N9H30_Device_Driver */

/*** (C) COPYRIGHT 2018 Nuvoton Technology Corp. ***/