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

73 lines
2.2 KiB
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. ***/