File content as of revision 18:6a4db94011d3:

/**************************************************************************//**
 * @file     sys.c
 * @version  V3.00
 * $Revision: 12 $
 * $Date: 15/08/11 10:26a $
 * @brief    M451 series SYS driver source file
 *
 * @note
 * Copyright (C) 2014~2015 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/

#include "M451Series.h"

#ifdef __cplusplus
extern "C"
{
#endif

/** @addtogroup Standard_Driver Standard Driver
  @{
*/

/** @addtogroup SYS_Driver SYS Driver
  @{
*/


/** @addtogroup SYS_EXPORTED_FUNCTIONS SYS Exported Functions
  @{
*/

/**
  * @brief      Clear reset source
  * @param[in]  u32Src is system reset source. Including :
  *             - \ref SYS_RSTSTS_CPURF_Msk
  *             - \ref SYS_RSTSTS_SYSRF_Msk
  *             - \ref SYS_RSTSTS_BODRF_Msk
  *             - \ref SYS_RSTSTS_LVRF_Msk
  *             - \ref SYS_RSTSTS_WDTRF_Msk
  *             - \ref SYS_RSTSTS_PINRF_Msk
  *             - \ref SYS_RSTSTS_PORF_Msk
  * @return     None
  * @details    This function clear the selected system reset source.
  */
void SYS_ClearResetSrc(uint32_t u32Src)
{
    SYS->RSTSTS |= u32Src;
}

/**
  * @brief      Get Brown-out detector output status
  * @param      None
  * @retval     0 System voltage is higher than BOD_VL setting or BOD_EN is 0.
  * @retval     1 System voltage is lower than BOD_VL setting.
  * @details    This function get Brown-out detector output status.
  */
uint32_t SYS_GetBODStatus(void)
{
    return ((SYS->BODCTL & SYS_BODCTL_BODOUT_Msk) >> SYS_BODCTL_BODOUT_Pos);
}

/**
  * @brief      Get reset status register value
  * @param      None
  * @return     Reset source
  * @details    This function get the system reset status register value.
  */
uint32_t SYS_GetResetSrc(void)
{
    return (SYS->RSTSTS);
}

/**
  * @brief      Check if register is locked nor not
  * @param      None
  * @retval     0 Write-protection function is disabled.
  *             1 Write-protection function is enabled.
  * @details    This function check register write-protection bit setting.
  */
uint32_t SYS_IsRegLocked(void)
{
    return !(SYS->REGLCTL & 0x1);
}

/**
  * @brief      Get product ID
  * @param      None
  * @return     Product ID
  * @details    This function get product ID.
  */
uint32_t  SYS_ReadPDID(void)
{
    return SYS->PDID;
}

/**
  * @brief      Reset chip with chip reset
  * @param      None
  * @return     None
  * @details    This function reset chip with chip reset.
  *             The register write-protection function should be disabled before using this function.
  */
void SYS_ResetChip(void)
{
    SYS->IPRST0 |= SYS_IPRST0_CHIPRST_Msk;
}

/**
  * @brief      Reset chip with CPU reset
  * @param      None
  * @return     None
  * @details    This function reset CPU with CPU reset.
  *             The register write-protection function should be disabled before using this function.
  */
void SYS_ResetCPU(void)
{
    SYS->IPRST0 |= SYS_IPRST0_CPURST_Msk;
}

/**
  * @brief      Reset selected module
  * @param[in]  u32ModuleIndex is module index. Including :
  *             - \ref PDMA_RST
  *             - \ref EBI_RST
  *             - \ref USBH_RST
  *             - \ref CRC_RST
  *             - \ref GPIO_RST
  *             - \ref TMR0_RST
  *             - \ref TMR1_RST
  *             - \ref TMR2_RST
  *             - \ref TMR3_RST
  *             - \ref ACMP01_RST
  *             - \ref I2C0_RST
  *             - \ref I2C1_RST
  *             - \ref SPI0_RST
  *             - \ref SPI1_RST
  *             - \ref SPI2_RST
  *             - \ref UART0_RST
  *             - \ref UART1_RST
  *             - \ref UART2_RST
  *             - \ref UART3_RST
  *             - \ref CAN0_RST
  *             - \ref OTG_RST
  *             - \ref USBD_RST
  *             - \ref EADC_RST
  *             - \ref SC0_RST
  *             - \ref DAC_RST
  *             - \ref PWM0_RST
  *             - \ref PWM1_RST
  *             - \ref TK_RST
  * @return     None
  * @details    This function reset selected module.
  */
void SYS_ResetModule(uint32_t u32ModuleIndex)
{
    /* Generate reset signal to the corresponding module */
    *(volatile uint32_t *)((uint32_t)&SYS->IPRST0 + (u32ModuleIndex >> 24))  |= 1 << (u32ModuleIndex & 0x00ffffff);

    /* Release corresponding module from reset state */
    *(volatile uint32_t *)((uint32_t)&SYS->IPRST0 + (u32ModuleIndex >> 24))  &= ~(1 << (u32ModuleIndex & 0x00ffffff));
}

/**
  * @brief      Enable and configure Brown-out detector function
  * @param[in]  i32Mode is reset or interrupt mode. Including :
  *             - \ref SYS_BODCTL_BOD_RST_EN
  *             - \ref SYS_BODCTL_BOD_INTERRUPT_EN
  * @param[in]  u32BODLevel is Brown-out voltage level. Including :
  *             - \ref SYS_BODCTL_BODVL_4_5V
  *             - \ref SYS_BODCTL_BODVL_3_7V
  *             - \ref SYS_BODCTL_BODVL_2_7V
  *             - \ref SYS_BODCTL_BODVL_2_2V
  * @return     None
  * @details    This function configure Brown-out detector reset or interrupt mode, enable Brown-out function and set Brown-out voltage level.
  *             The register write-protection function should be disabled before using this function.
  */
void SYS_EnableBOD(int32_t i32Mode, uint32_t u32BODLevel)
{
    /* Enable Brown-out Detector function */
    SYS->BODCTL |= SYS_BODCTL_BODEN_Msk;

    /* Enable Brown-out interrupt or reset function */
    SYS->BODCTL = (SYS->BODCTL & ~SYS_BODCTL_BODRSTEN_Msk) | i32Mode;

    /* Select Brown-out Detector threshold voltage */
    SYS->BODCTL = (SYS->BODCTL & ~SYS_BODCTL_BODVL_Msk) | u32BODLevel;
}

/**
  * @brief      Disable Brown-out detector function
  * @param      None
  * @return     None
  * @details    This function disable Brown-out detector function.
  *             The register write-protection function should be disabled before using this function.
  */
void SYS_DisableBOD(void)
{
    SYS->BODCTL &= ~SYS_BODCTL_BODEN_Msk;
}



/*@}*/ /* end of group SYS_EXPORTED_FUNCTIONS */

/*@}*/ /* end of group SYS_Driver */

/*@}*/ /* end of group Standard_Driver */

#ifdef __cplusplus
}
#endif

/*** (C) COPYRIGHT 2014~2015 Nuvoton Technology Corp. ***/