text: /**************************************************************************//**
   * @file     sys.c
   * @version  V3.00
   * $Revision: 6 $
   * $Date: 14/01/28 6:58p $
   * @brief    M051 series SYS driver source file
   *
   * @note
   * Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved.
  *****************************************************************************/
  #include "M051Series.h"
  /** @addtogroup M051_Device_Driver M051 Device Driver
    @{
  */
  
  /** @addtogroup M051_SYS_Driver SYS Driver
    @{
  */
  
  
  /** @addtogroup M051_SYS_EXPORTED_FUNCTIONS SYS Exported Functions
    @{
  */
  
  /**
    * @brief  This function clear the selected system reset source
    * @param  u32Src is system reset source
    * @return None
    */
  void SYS_ClearResetSrc(uint32_t u32Src)
  {
      SYS->RSTSRC |= u32Src;
  }
  
  /**
    * @brief  This function get Brown-out detector output status
    * @return 0: System voltage is higher than BOD_VL setting or BOD_EN is 0.
    *         1: System voltage is lower than BOD_VL setting.
    *         Note : If the BOD_EN is 0, this function always return 0.
    */
  uint32_t SYS_GetBODStatus(void)
  {
      return (SYS->BODCR & SYS_BODCR_BOD_OUT_Msk) ? 1 : 0;
  }
  
  /**
    * @brief  This function get the system reset source register value
    * @return Reset source
    */
  uint32_t SYS_GetResetSrc(void)
  {
      return (SYS->RSTSRC);
  }
  
  /**
    * @brief  This function check register write-protection bit setting
    * @return 0: Write-protection function is disabled.
    *         1: Write-protection function is enabled.
    */
  uint32_t SYS_IsRegLocked(void)
  {
      return !(SYS->REGWRPROT & SYS_REGWRPROT_REGPROTDIS_Msk);
  }
  
  /**
    * @brief  This function get product ID.
    * @return Product ID
    */
  uint32_t  SYS_ReadPDID(void)
  {
      return SYS->PDID;
  }
  
  /**
    * @brief  This function reset chip.
    * @return None
    */
  void SYS_ResetChip(void)
  {
      SYS->IPRSTC1 |= SYS_IPRSTC1_CHIP_RST_Msk;
  }
  
  /**
    * @brief  This function reset CPU.
    * @return None
    */
  void SYS_ResetCPU(void)
  {
      SYS->IPRSTC1 |= SYS_IPRSTC1_CPU_RST_Msk;
  }
  
  /**
    * @brief  This function reset selected modules.
    * @param  u32ModuleIndex is module index. Including :
    *           - \ref CHIP_RST
    *           - \ref CPU_RST
    *           - \ref EBI_RST
    *           - \ref HDIV_RST
    *           - \ref GPIO_RST
    *           - \ref TMR0_RST
    *           - \ref TMR1_RST
    *           - \ref TMR2_RST
    *           - \ref TMR3_RST
    *           - \ref I2C0_RST
    *           - \ref I2C1_RST
    *           - \ref SPI0_RST
    *           - \ref SPI1_RST
    *           - \ref UART0_RST
    *           - \ref UART1_RST
    *           - \ref PWM03_RST
    *           - \ref PWM47_RST
    *           - \ref ACMP01_RST
    *           - \ref ACMP23_RST
    *           - \ref ADC_RST  
    * @return None
    */
  void SYS_ResetModule(uint32_t u32ModuleIndex)
  {
      *(volatile uint32_t *)(&(SYS->IPRSTC1) + (u32ModuleIndex >> 24)) |= 1 << (u32ModuleIndex & 0x00ffffff);
      *(volatile uint32_t *)(&(SYS->IPRSTC1) + (u32ModuleIndex >> 24)) &= ~(1 << (u32ModuleIndex & 0x00ffffff));
  }
  
  /**
    * @brief  This function configure BOD function.
    *         Configure BOD reset or interrupt mode and set Brown-out voltage level.
    *         Enable Brown-out function
    * @param  i32Mode is reset or interrupt mode. Including :
    *         - \ref SYS_BODCR_BOD_RST_EN
    *         - \ref SYS_BODCR_BOD_INTERRUPT_EN
    * @param  u32BODLevel is Brown-out voltage level. Including :
    *         - \ref SYS_BODCR_BOD_VL_4_4V
    *         - \ref SYS_BODCR_BOD_VL_3_7V
    *         - \ref SYS_BODCR_BOD_VL_2_7V
    *         - \ref SYS_BODCR_BOD_VL_2_2V
    * @return None
    */
  void SYS_EnableBOD(int32_t i32Mode, uint32_t u32BODLevel)
  {
      SYS->BODCR |= SYS_BODCR_BOD_EN_Msk;
      SYS->BODCR = (SYS->BODCR & ~SYS_BODCR_BOD_RSTEN_Msk) | i32Mode;
      SYS->BODCR = (SYS->BODCR & ~SYS_BODCR_BOD_VL_Msk) | u32BODLevel;
  }
  
  /**
    * @brief  This function disable BOD function.
    * @return None
    */
  void SYS_DisableBOD(void)
  {
      SYS->BODCR &= ~SYS_BODCR_BOD_EN_Msk;
  }
  
  
  
  /*@}*/ /* end of group M051_SYS_EXPORTED_FUNCTIONS */
  
  /*@}*/ /* end of group M051_SYS_Driver */
  
  /*@}*/ /* end of group M051_Device_Driver */
  
  /*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/
  