stm32f10x_rcc.c

STM32驱动ADXL345

  * @note   This function must be used only when the PLL is disabled.
  * @param  RCC_PLLSource: specifies the PLL entry clock source.
  *   For @b STM32_Connectivity_line_devices, this parameter can be one of the
  *   following values:
  *     @arg RCC_PLLSource_HSI_Div2: HSI oscillator clock divided by 2 selected as PLL clock entry
  *     @arg RCC_PLLSource_PREDIV1: PREDIV1 clock selected as PLL clock entry
  *   For @b other_STM32_devices, this parameter can be one of the following values:
  *     @arg RCC_PLLSource_HSI_Div2: HSI oscillator clock divided by 2 selected as PLL clock entry
  *     @arg RCC_PLLSource_HSE_Div1: HSE oscillator clock selected as PLL clock entry
  *     @arg RCC_PLLSource_HSE_Div2: HSE oscillator clock divided by 2 selected as PLL clock entry 
  * @param  RCC_PLLMul: specifies the PLL multiplication factor.
  *   For @b STM32_Connectivity_line_devices, this parameter can be RCC_PLLMul_x where x:{[4,9], 6_5}
  *   For @b other_STM32_devices, this parameter can be RCC_PLLMul_x where x:[2,16]  
  * @retval None
  */
void RCC_PLLConfig(uint32_t RCC_PLLSource, uint32_t RCC_PLLMul)
{
  uint32_t tmpreg = 0;

  /* Check the parameters */
  assert_param(IS_RCC_PLL_SOURCE(RCC_PLLSource));
  assert_param(IS_RCC_PLL_MUL(RCC_PLLMul));

  tmpreg = RCC->CFGR;
  /* Clear PLLSRC, PLLXTPRE and PLLMUL[3:0] bits */
  tmpreg &= CFGR_PLL_Mask;
  /* Set the PLL configuration bits */
  tmpreg |= RCC_PLLSource | RCC_PLLMul;
  /* Store the new value */
  RCC->CFGR = tmpreg;
}

/**
  * @brief  Enables or disables the PLL.
  * @note   The PLL can not be disabled if it is used as system clock.
  * @param  NewState: new state of the PLL. This parameter can be: ENABLE or DISABLE.
  * @retval None
  */
void RCC_PLLCmd(FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_FUNCTIONAL_STATE(NewState));

  *(__IO uint32_t *) CR_PLLON_BB = (uint32_t)NewState;
}

#ifdef STM32F10X_CL
/**
  * @brief  Configures the PREDIV1 division factor.
  * @note 
  *   - This function must be used only when the PLL is disabled.
  *   - This function applies only to STM32 Connectivity line devices.
  * @param  RCC_PREDIV1_Source: specifies the PREDIV1 clock source.
  *   This parameter can be one of the following values:
  *     @arg RCC_PREDIV1_Source_HSE: HSE selected as PREDIV1 clock
  *     @arg RCC_PREDIV1_Source_PLL2: PLL2 selected as PREDIV1 clock
  * @param  RCC_PREDIV1_Div: specifies the PREDIV1 clock division factor.
  *   This parameter can be RCC_PREDIV1_Divx where x:[1,16]
  * @retval None
  */
void RCC_PREDIV1Config(uint32_t RCC_PREDIV1_Source, uint32_t RCC_PREDIV1_Div)
{
  uint32_t tmpreg = 0;
  
  /* Check the parameters */
  assert_param(IS_RCC_PREDIV1_SOURCE(RCC_PREDIV1_Source));
  assert_param(IS_RCC_PREDIV1(RCC_PREDIV1_Div));

  tmpreg = RCC->CFGR2;
  /* Clear PREDIV1[3:0] and PREDIV1SRC bits */
  tmpreg &= ~(CFGR2_PREDIV1 | CFGR2_PREDIV1SRC);
  /* Set the PREDIV1 clock source and division factor */
  tmpreg |= RCC_PREDIV1_Source | RCC_PREDIV1_Div ;
  /* Store the new value */
  RCC->CFGR2 = tmpreg;
}


/**
  * @brief  Configures the PREDIV2 division factor.
  * @note 
  *   - This function must be used only when both PLL2 and PLL3 are disabled.
  *   - This function applies only to STM32 Connectivity line devices.
  * @param  RCC_PREDIV2_Div: specifies the PREDIV2 clock division factor.
  *   This parameter can be RCC_PREDIV2_Divx where x:[1,16]
  * @retval None
  */
void RCC_PREDIV2Config(uint32_t RCC_PREDIV2_Div)
{
  uint32_t tmpreg = 0;

  /* Check the parameters */
  assert_param(IS_RCC_PREDIV2(RCC_PREDIV2_Div));

  tmpreg = RCC->CFGR2;
  /* Clear PREDIV2[3:0] bits */
  tmpreg &= ~CFGR2_PREDIV2;
  /* Set the PREDIV2 division factor */
  tmpreg |= RCC_PREDIV2_Div;
  /* Store the new value */
  RCC->CFGR2 = tmpreg;
}

/**
  * @brief  Configures the PLL2 multiplication factor.
  * @note
  *   - This function must be used only when the PLL2 is disabled.
  *   - This function applies only to STM32 Connectivity line devices.
  * @param  RCC_PLL2Mul: specifies the PLL2 multiplication factor.
  *   This parameter can be RCC_PLL2Mul_x where x:{[8,14], 16, 20}
  * @retval None
  */
void RCC_PLL2Config(uint32_t RCC_PLL2Mul)
{
  uint32_t tmpreg = 0;

  /* Check the parameters */
  assert_param(IS_RCC_PLL2_MUL(RCC_PLL2Mul));

  tmpreg = RCC->CFGR2;
  /* Clear PLL2Mul[3:0] bits */
  tmpreg &= ~CFGR2_PLL2MUL;
  /* Set the PLL2 configuration bits */
  tmpreg |= RCC_PLL2Mul;
  /* Store the new value */
  RCC->CFGR2 = tmpreg;
}


/**
  * @brief  Enables or disables the PLL2.
  * @note 
  *   - The PLL2 can not be disabled if it is used indirectly as system clock
  *     (i.e. it is used as PLL clock entry that is used as System clock).
  *   - This function applies only to STM32 Connectivity line devices.
  * @param  NewState: new state of the PLL2. This parameter can be: ENABLE or DISABLE.
  * @retval None
  */
void RCC_PLL2Cmd(FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_FUNCTIONAL_STATE(NewState));

  *(__IO uint32_t *) CR_PLL2ON_BB = (uint32_t)NewState;
}


/**
  * @brief  Configures the PLL3 multiplication factor.
  * @note 
  *   - This function must be used only when the PLL3 is disabled.
  *   - This function applies only to STM32 Connectivity line devices.
  * @param  RCC_PLL3Mul: specifies the PLL3 multiplication factor.
  *   This parameter can be RCC_PLL3Mul_x where x:{[8,14], 16, 20}
  * @retval None
  */
void RCC_PLL3Config(uint32_t RCC_PLL3Mul)
{
  uint32_t tmpreg = 0;

  /* Check the parameters */
  assert_param(IS_RCC_PLL3_MUL(RCC_PLL3Mul));

  tmpreg = RCC->CFGR2;
  /* Clear PLL3Mul[3:0] bits */
  tmpreg &= ~CFGR2_PLL3MUL;
  /* Set the PLL3 configuration bits */
  tmpreg |= RCC_PLL3Mul;
  /* Store the new value */
  RCC->CFGR2 = tmpreg;
}


/**
  * @brief  Enables or disables the PLL3.
  * @note   This function applies only to STM32 Connectivity line devices.
  * @param  NewState: new state of the PLL3. This parameter can be: ENABLE or DISABLE.
  * @retval None
  */
void RCC_PLL3Cmd(FunctionalState NewState)
{
  /* Check the parameters */

  assert_param(IS_FUNCTIONAL_STATE(NewState));
  *(__IO uint32_t *) CR_PLL3ON_BB = (uint32_t)NewState;
}
#endif /* STM32F10X_CL */

/**
  * @brief  Configures the system clock (SYSCLK).
  * @param  RCC_SYSCLKSource: specifies the clock source used as system clock.
  *   This parameter can be one of the following values:
  *     @arg RCC_SYSCLKSource_HSI: HSI selected as system clock
  *     @arg RCC_SYSCLKSource_HSE: HSE selected as system clock
  *     @arg RCC_SYSCLKSource_PLLCLK: PLL selected as system clock
  * @retval None
  */
void RCC_SYSCLKConfig(uint32_t RCC_SYSCLKSource)
{
  uint32_t tmpreg = 0;
  /* Check the parameters */
  assert_param(IS_RCC_SYSCLK_SOURCE(RCC_SYSCLKSource));
  tmpreg = RCC->CFGR;
  /* Clear SW[1:0] bits */
  tmpreg &= CFGR_SW_Mask;
  /* Set SW[1:0] bits according to RCC_SYSCLKSource value */
  tmpreg |= RCC_SYSCLKSource;
  /* Store the new value */
  RCC->CFGR = tmpreg;
}

/**
  * @brief  Returns the clock source used as system clock.
  * @param  None
  * @retval The clock source used as system clock. The returned value can
  *   be one of the following:
  *     - 0x00: HSI used as system clock
  *     - 0x04: HSE used as system clock
  *     - 0x08: PLL used as system clock
  */
uint8_t RCC_GetSYSCLKSource(void)
{
  return ((uint8_t)(RCC->CFGR & CFGR_SWS_Mask));
}

/**
  * @brief  Configures the AHB clock (HCLK).
  * @param  RCC_SYSCLK: defines the AHB clock divider. This clock is derived from 
  *   the system clock (SYSCLK).
  *   This parameter can be one of the following values:
  *     @arg RCC_SYSCLK_Div1: AHB clock = SYSCLK
  *     @arg RCC_SYSCLK_Div2: AHB clock = SYSCLK/2
  *     @arg RCC_SYSCLK_Div4: AHB clock = SYSCLK/4
  *     @arg RCC_SYSCLK_Div8: AHB clock = SYSCLK/8
  *     @arg RCC_SYSCLK_Div16: AHB clock = SYSCLK/16
  *     @arg RCC_SYSCLK_Div64: AHB clock = SYSCLK/64
  *     @arg RCC_SYSCLK_Div128: AHB clock = SYSCLK/128
  *     @arg RCC_SYSCLK_Div256: AHB clock = SYSCLK/256
  *     @arg RCC_SYSCLK_Div512: AHB clock = SYSCLK/512
  * @retval None
  */
void RCC_HCLKConfig(uint32_t RCC_SYSCLK)
{
  uint32_t tmpreg = 0;
  /* Check the parameters */
  assert_param(IS_RCC_HCLK(RCC_SYSCLK));
  tmpreg = RCC->CFGR;
  /* Clear HPRE[3:0] bits */
  tmpreg &= CFGR_HPRE_Reset_Mask;
  /* Set HPRE[3:0] bits according to RCC_SYSCLK value */
  tmpreg |= RCC_SYSCLK;
  /* Store the new value */
  RCC->CFGR = tmpreg;
}

/**
  * @brief  Configures the Low Speed APB clock (PCLK1).
  * @param  RCC_HCLK: defines the APB1 clock divider. This clock is derived from 
  *   the AHB clock (HCLK).
  *   This parameter can be one of the following values:
  *     @arg RCC_HCLK_Div1: APB1 clock = HCLK
  *     @arg RCC_HCLK_Div2: APB1 clock = HCLK/2
  *     @arg RCC_HCLK_Div4: APB1 clock = HCLK/4
  *     @arg RCC_HCLK_Div8: APB1 clock = HCLK/8
  *     @arg RCC_HCLK_Div16: APB1 clock = HCLK/16
  * @retval None
  */
void RCC_PCLK1Config(uint32_t RCC_HCLK)
{
  uint32_t tmpreg = 0;
  /* Check the parameters */
  assert_param(IS_RCC_PCLK(RCC_HCLK));
  tmpreg = RCC->CFGR;
  /* Clear PPRE1[2:0] bits */
  tmpreg &= CFGR_PPRE1_Reset_Mask;
  /* Set PPRE1[2:0] bits according to RCC_HCLK value */
  tmpreg |= RCC_HCLK;
  /* Store the new value */
  RCC->CFGR = tmpreg;
}

/**
  * @brief  Configures the High Speed APB clock (PCLK2).
  * @param  RCC_HCLK: defines the APB2 clock divider. This clock is derived from 
  *   the AHB clock (HCLK).
  *   This parameter can be one of the following values:
  *     @arg RCC_HCLK_Div1: APB2 clock = HCLK
  *     @arg RCC_HCLK_Div2: APB2 clock = HCLK/2
  *     @arg RCC_HCLK_Div4: APB2 clock = HCLK/4
  *     @arg RCC_HCLK_Div8: APB2 clock = HCLK/8
  *     @arg RCC_HCLK_Div16: APB2 clock = HCLK/16
  * @retval None
  */
void RCC_PCLK2Config(uint32_t RCC_HCLK)
{
  uint32_t tmpreg = 0;
  /* Check the parameters */
  assert_param(IS_RCC_PCLK(RCC_HCLK));
  tmpreg = RCC->CFGR;
  /* Clear PPRE2[2:0] bits */
  tmpreg &= CFGR_PPRE2_Reset_Mask;
  /* Set PPRE2[2:0] bits according to RCC_HCLK value */
  tmpreg |= RCC_HCLK << 3;
  /* Store the new value */
  RCC->CFGR = tmpreg;
}

/**
  * @brief  Enables or disables the specified RCC interrupts.
  * @param  RCC_IT: specifies the RCC interrupt sources to be enabled or disabled.
  * 
  *   For @b STM32_Connectivity_line_devices, this parameter can be any combination
  *   of the following values        
  *     @arg RCC_IT_LSIRDY: LSI ready interrupt
  *     @arg RCC_IT_LSERDY: LSE ready interrupt
  *     @arg RCC_IT_HSIRDY: HSI ready interrupt
  *     @arg RCC_IT_HSERDY: HSE ready interrupt
  *     @arg RCC_IT_PLLRDY: PLL ready interrupt
  *     @arg RCC_IT_PLL2RDY: PLL2 ready interrupt
  *     @arg RCC_IT_PLL3RDY: PLL3 ready interrupt
  * 
  *   For @b other_STM32_devices, this parameter can be any combination of the 
  *   following values        
  *     @arg RCC_IT_LSIRDY: LSI ready interrupt
  *     @arg RCC_IT_LSERDY: LSE ready interrupt
  *     @arg RCC_IT_HSIRDY: HSI ready interrupt
  *     @arg RCC_IT_HSERDY: HSE ready interrupt
  *     @arg RCC_IT_PLLRDY: PLL ready interrupt
  *       
  * @param  NewState: new state of the specified RCC interrupts.
  *   This parameter can be: ENABLE or DISABLE.
  * @retval None
  */
void RCC_ITConfig(uint8_t RCC_IT, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_RCC_IT(RCC_IT));
  assert_param(IS_FUNCTIONAL_STATE(NewState));
  if (NewState != DISABLE)
  {
    /* Perform Byte access to RCC_CIR bits to enable the selected interrupts */
    *(__IO uint8_t *) CIR_BYTE2_ADDRESS |= RCC_IT;
  }
  else
  {
    /* Perform Byte access to RCC_CIR bits to disable the selected interrupts */
    *(__IO uint8_t *) CIR_BYTE2_ADDRESS &= (uint8_t)~RCC_IT;
  }
}

#ifndef STM32F10X_CL
/**
  * @brief  Configures the USB clock (USBCLK).
  * @param  RCC_USBCLKSource: specifies the USB clock source. This clock is 
  *   derived from the PLL output.
  *   This parameter can be one of the following values:
  *     @arg RCC_USBCLKSource_PLLCLK_1Div5: PLL clock divided by 1,5 selected as USB 
  *                                     clock source
  *     @arg RCC_USBCLKSource_PLLCLK_Div1: PLL clock selected as USB clock source
  * @retval None
  */
void RCC_USBCLKConfig(uint32_t RCC_USBCLKSource)