HT单片机笔记1-时钟配置（2022/2/20）

CKCU_DeInit();

CKCU_HSECmd(ENABLE);

ClockStatus = CKCU_WaitHSEReady();

if(ClockStatus == SUCCESS)

    CKCU_PLLInit(&PLLInit);



    CKCU_PLLCmd(ENABLE);

        //主要结构体成员如下：

1.  ClockSource //时钟来源，可填：CKCU_PLLSRC_HSE/CKCU_PLLSRC_HSI

2.  CFG  //配置时钟用，可填宏：

    #define CKCU_PLL_4M_48M         ((12UL << 23) | (0UL << 21))

        #define CKCU_PLL_4M_40M         ((10UL << 23) | (0UL << 21))

        #define CKCU_PLL_8M_48M         (( 6UL << 23) | (0UL << 21))

        #define CKCU_PLL_8M_40M         (( 5UL << 23) | (0UL << 21))

        #define CKCU_PLL_8M_32M         (( 4UL << 23) | (0UL << 21))

        #define CKCU_PLL_12M_48M        (( 4UL << 23) | (0UL << 21))

        #define CKCU_PLL_16M_48M        (( 3UL << 23) | (0UL << 21))

          #if (LIBCFG_CKCU_SYS_CK_60M)

          #define CKCU_PLL_4M_60M         ((0UL << 28) | (15UL << 23) | (0UL << 21))

          #define CKCU_PLL_8M_60M         ((1UL << 28) | (15UL << 23) | (0UL << 21))

          #define CKCU_PLL_12M_60M        ((0UL << 28) | ( 5UL << 23) | (0UL << 21))

          #define CKCU_PLL_16M_56M        ((1UL << 28) | ( 7UL << 23) | (0UL << 21))

3.        BYPASSCmd//是否使能旁路

 while(CKCU_GetClockReadyStatus(CKCU_FLAG_PLLRDY) == RESET);

FLASH_SetWaitState(FLASH_WAITSTATE_1); 

CKCU_SetHCLKPrescaler(CKCU_SYSCLK_DIV1);

    ClockStatus = CKCU_SysClockConfig(CKCU_SW_PLL);



    if(ClockStatus != SUCCESS)

    {

      while(1);

    }

void SysClockConfig_48MHz(void)

{

  ErrStatus ClockStatus;



  /* Reset CKCU, SYSCLK = HSI */

    

  CKCU_DeInit();



  /* Enable HSE */

  CKCU_HSECmd(ENABLE);



  /* Wait until HSE is ready or time-out */

  ClockStatus = CKCU_WaitHSEReady();



  if(ClockStatus == SUCCESS)

  {

    /* PLL configuration, PLLCLK = 48 MHz */

    PLLInit.ClockSource = CKCU_PLLSRC_HSE;

    #if defined(HTCFG_HSE_12MHZ)

    PLLInit.CFG = CKCU_PLL_12M_48M;

    #else

    PLLInit.CFG = CKCU_PLL_8M_48M;

    #endif

    PLLInit.BYPASSCmd = DISABLE;

    CKCU_PLLInit(&PLLInit);



    CKCU_PLLCmd(ENABLE);



    /* Wait until PLL is ready */

    while(CKCU_GetClockReadyStatus(CKCU_FLAG_PLLRDY) == RESET);



    /* FLASH wait state configuration */

    FLASH_SetWaitState(FLASH_WAITSTATE_1);  /* FLASH one wait clock */



    /* HCLK = SYSCLK/1 */

    CKCU_SetHCLKPrescaler(CKCU_SYSCLK_DIV1);



    /* Configure PLL as system clock */

    ClockStatus = CKCU_SysClockConfig(CKCU_SW_PLL);



    if(ClockStatus != SUCCESS)

    {

      while(1);

    }

  }

  else

  {

    /* HSE is failed. User can handle this situation here. */

    while(1);

  }

}