RCC_Exported_Functions

Functions
void	RCC_DeInit (void)
	Resets the RCC clock configuration to the default reset state. More...
void	RCC_HSEConfig (uint32_t RCC_HSE)
	Configures the External High Speed oscillator (HSE). More...
ErrorStatus	RCC_WaitForHSEStartUp (void)
	Waits for HSE start-up. More...
void	RCC_AdjustHSICalibrationValue (uint8_t HSICalibrationValue)
	Adjusts the Internal High Speed oscillator (HSI) calibration value. More...
void	RCC_HSICmd (FunctionalState NewState)
	Enables or disables the Internal High Speed oscillator (HSI). More...
void	RCC_PLLConfig (uint32_t RCC_PLLSource, uint32_t RCC_PLLMul)
	Configures the PLL clock source and multiplication factor. More...
void	RCC_PLLCmd (FunctionalState NewState)
	Enables or disables the PLL. More...
void	RCC_SYSCLKConfig (uint32_t RCC_SYSCLKSource)
	Configures the system clock (SYSCLK). More...
uint8_t	RCC_GetSYSCLKSource (void)
	Returns the clock source used as system clock. More...
void	RCC_HCLKConfig (uint32_t RCC_SYSCLK)
	Configures the AHB clock (HCLK). More...
void	RCC_PCLK1Config (uint32_t RCC_HCLK)
	Configures the Low Speed APB clock (PCLK1). More...
void	RCC_PCLK2Config (uint32_t RCC_HCLK)
	Configures the High Speed APB clock (PCLK2). More...
void	RCC_ITConfig (uint8_t RCC_IT, FunctionalState NewState)
	Enables or disables the specified RCC interrupts. More...
void	RCC_USBCLKConfig (uint32_t RCC_USBCLKSource)
	Configures the USB clock (USBCLK). More...
void	RCC_ADCCLKConfig (uint32_t RCC_PCLK2)
	Configures the ADC clock (ADCCLK). More...
void	RCC_LSEConfig (uint8_t RCC_LSE)
	Configures the External Low Speed oscillator (LSE). More...
void	RCC_LSICmd (FunctionalState NewState)
	Enables or disables the Internal Low Speed oscillator (LSI). More...
void	RCC_RTCCLKConfig (uint32_t RCC_RTCCLKSource)
	Configures the RTC clock (RTCCLK). More...
void	RCC_RTCCLKCmd (FunctionalState NewState)
	Enables or disables the RTC clock. More...
void	RCC_GetClocksFreq (RCC_ClocksTypeDef *RCC_Clocks)
	Returns the frequencies of different on chip clocks. More...
void	RCC_AHBPeriphClockCmd (uint32_t RCC_AHBPeriph, FunctionalState NewState)
	Enables or disables the AHB peripheral clock. More...
void	RCC_APB2PeriphClockCmd (uint32_t RCC_APB2Periph, FunctionalState NewState)
	Enables or disables the High Speed APB (APB2) peripheral clock. More...
void	RCC_APB1PeriphClockCmd (uint32_t RCC_APB1Periph, FunctionalState NewState)
	Enables or disables the Low Speed APB (APB1) peripheral clock. More...
void	RCC_APB2PeriphResetCmd (uint32_t RCC_APB2Periph, FunctionalState NewState)
	Forces or releases High Speed APB (APB2) peripheral reset. More...
void	RCC_APB1PeriphResetCmd (uint32_t RCC_APB1Periph, FunctionalState NewState)
	Forces or releases Low Speed APB (APB1) peripheral reset. More...
void	RCC_BackupResetCmd (FunctionalState NewState)
	Forces or releases the Backup domain reset. More...
void	RCC_ClockSecuritySystemCmd (FunctionalState NewState)
	Enables or disables the Clock Security System. More...
void	RCC_MCOConfig (uint8_t RCC_MCO)
	Selects the clock source to output on MCO pin. More...
FlagStatus	RCC_GetFlagStatus (uint8_t RCC_FLAG)
	Checks whether the specified RCC flag is set or not. More...
void	RCC_ClearFlag (void)
	Clears the RCC reset flags. More...
ITStatus	RCC_GetITStatus (uint8_t RCC_IT)
	Checks whether the specified RCC interrupt has occurred or not. More...
void	RCC_ClearITPendingBit (uint8_t RCC_IT)
	Clears the RCC's interrupt pending bits. More...

Detailed Description

Function Documentation

void RCC_ADCCLKConfig

(

uint32_t

RCC_PCLK2)

Configures the ADC clock (ADCCLK).

Parameters

RCC_PCLK2,:

defines the ADC clock divider. This clock is derived from the APB2 clock (PCLK2). This parameter can be one of the following values: RCC_PCLK2_Div2: ADC clock = PCLK2/2 RCC_PCLK2_Div4: ADC clock = PCLK2/4 RCC_PCLK2_Div6: ADC clock = PCLK2/6 RCC_PCLK2_Div8: ADC clock = PCLK2/8

Return values

None

Definition at line 766 of file stm32f10x_rcc.c.

void RCC_AdjustHSICalibrationValue

(

uint8_t

HSICalibrationValue)

Adjusts the Internal High Speed oscillator (HSI) calibration value.

Parameters

HSICalibrationValue,:

specifies the calibration trimming value. This parameter must be a number between 0 and 0x1F.

Return values

None

Definition at line 334 of file stm32f10x_rcc.c.

void RCC_AHBPeriphClockCmd	(	uint32_t	RCC_AHBPeriph,
		FunctionalState	NewState
	)

Enables or disables the AHB peripheral clock.

Parameters

RCC_AHBPeriph,:

specifies the AHB peripheral to gates its clock.

For STM32_Connectivity_line_devices, this parameter can be any combination of the following values:

• RCC_AHBPeriph_DMA1
• RCC_AHBPeriph_DMA2
• RCC_AHBPeriph_SRAM
• RCC_AHBPeriph_FLITF
• RCC_AHBPeriph_CRC
• RCC_AHBPeriph_OTG_FS
• RCC_AHBPeriph_ETH_MAC
• RCC_AHBPeriph_ETH_MAC_Tx
• RCC_AHBPeriph_ETH_MAC_Rx

For other_STM32_devices, this parameter can be any combination of the following values:

• RCC_AHBPeriph_DMA1
• RCC_AHBPeriph_DMA2
• RCC_AHBPeriph_SRAM
• RCC_AHBPeriph_FLITF
• RCC_AHBPeriph_CRC
• RCC_AHBPeriph_FSMC
• RCC_AHBPeriph_SDIO

Note

SRAM and FLITF clock can be disabled only during sleep mode.

Parameters

NewState,:

new state of the specified peripheral clock. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 1064 of file stm32f10x_rcc.c.

void RCC_APB1PeriphClockCmd	(	uint32_t	RCC_APB1Periph,
		FunctionalState	NewState
	)

Enables or disables the Low Speed APB (APB1) peripheral clock.

Parameters

RCC_APB1Periph,:

specifies the APB1 peripheral to gates its clock. This parameter can be any combination of the following values: RCC_APB1Periph_TIM2, RCC_APB1Periph_TIM3, RCC_APB1Periph_TIM4, RCC_APB1Periph_TIM5, RCC_APB1Periph_TIM6, RCC_APB1Periph_TIM7, RCC_APB1Periph_WWDG, RCC_APB1Periph_SPI2, RCC_APB1Periph_SPI3, RCC_APB1Periph_USART2, RCC_APB1Periph_USART3, RCC_APB1Periph_USART4, RCC_APB1Periph_USART5, RCC_APB1Periph_I2C1, RCC_APB1Periph_I2C2, RCC_APB1Periph_USB, RCC_APB1Periph_CAN1, RCC_APB1Periph_BKP, RCC_APB1Periph_PWR, RCC_APB1Periph_DAC, RCC_APB1Periph_CEC, RCC_APB1Periph_TIM12, RCC_APB1Periph_TIM13, RCC_APB1Periph_TIM14

NewState,:

new state of the specified peripheral clock. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 1126 of file stm32f10x_rcc.c.

void RCC_APB1PeriphResetCmd	(	uint32_t	RCC_APB1Periph,
		FunctionalState	NewState
	)

Forces or releases Low Speed APB (APB1) peripheral reset.

Parameters

RCC_APB1Periph,:

specifies the APB1 peripheral to reset. This parameter can be any combination of the following values: RCC_APB1Periph_TIM2, RCC_APB1Periph_TIM3, RCC_APB1Periph_TIM4, RCC_APB1Periph_TIM5, RCC_APB1Periph_TIM6, RCC_APB1Periph_TIM7, RCC_APB1Periph_WWDG, RCC_APB1Periph_SPI2, RCC_APB1Periph_SPI3, RCC_APB1Periph_USART2, RCC_APB1Periph_USART3, RCC_APB1Periph_USART4, RCC_APB1Periph_USART5, RCC_APB1Periph_I2C1, RCC_APB1Periph_I2C2, RCC_APB1Periph_USB, RCC_APB1Periph_CAN1, RCC_APB1Periph_BKP, RCC_APB1Periph_PWR, RCC_APB1Periph_DAC, RCC_APB1Periph_CEC, RCC_APB1Periph_TIM12, RCC_APB1Periph_TIM13, RCC_APB1Periph_TIM14

NewState,:

new state of the specified peripheral clock. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 1216 of file stm32f10x_rcc.c.

void RCC_APB2PeriphClockCmd	(	uint32_t	RCC_APB2Periph,
		FunctionalState	NewState
	)

Enables or disables the High Speed APB (APB2) peripheral clock.

Parameters

RCC_APB2Periph,:

specifies the APB2 peripheral to gates its clock. This parameter can be any combination of the following values: RCC_APB2Periph_AFIO, RCC_APB2Periph_GPIOA, RCC_APB2Periph_GPIOB, RCC_APB2Periph_GPIOC, RCC_APB2Periph_GPIOD, RCC_APB2Periph_GPIOE, RCC_APB2Periph_GPIOF, RCC_APB2Periph_GPIOG, RCC_APB2Periph_ADC1, RCC_APB2Periph_ADC2, RCC_APB2Periph_TIM1, RCC_APB2Periph_SPI1, RCC_APB2Periph_TIM8, RCC_APB2Periph_USART1, RCC_APB2Periph_ADC3, RCC_APB2Periph_TIM15, RCC_APB2Periph_TIM16, RCC_APB2Periph_TIM17, RCC_APB2Periph_TIM9, RCC_APB2Periph_TIM10, RCC_APB2Periph_TIM11

NewState,:

new state of the specified peripheral clock. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 1095 of file stm32f10x_rcc.c.

void RCC_APB2PeriphResetCmd	(	uint32_t	RCC_APB2Periph,
		FunctionalState	NewState
	)

Forces or releases High Speed APB (APB2) peripheral reset.

Parameters

RCC_APB2Periph,:

specifies the APB2 peripheral to reset. This parameter can be any combination of the following values: RCC_APB2Periph_AFIO, RCC_APB2Periph_GPIOA, RCC_APB2Periph_GPIOB, RCC_APB2Periph_GPIOC, RCC_APB2Periph_GPIOD, RCC_APB2Periph_GPIOE, RCC_APB2Periph_GPIOF, RCC_APB2Periph_GPIOG, RCC_APB2Periph_ADC1, RCC_APB2Periph_ADC2, RCC_APB2Periph_TIM1, RCC_APB2Periph_SPI1, RCC_APB2Periph_TIM8, RCC_APB2Periph_USART1, RCC_APB2Periph_ADC3, RCC_APB2Periph_TIM15, RCC_APB2Periph_TIM16, RCC_APB2Periph_TIM17, RCC_APB2Periph_TIM9, RCC_APB2Periph_TIM10, RCC_APB2Periph_TIM11

NewState,:

new state of the specified peripheral reset. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 1185 of file stm32f10x_rcc.c.

void RCC_BackupResetCmd

(

FunctionalState

NewState)

Forces or releases the Backup domain reset.

Parameters

NewState,:

new state of the Backup domain reset. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 1237 of file stm32f10x_rcc.c.

void RCC_ClearFlag

(

void

)

Clears the RCC reset flags.

Note

The reset flags are: RCC_FLAG_PINRST, RCC_FLAG_PORRST, RCC_FLAG_SFTRST, RCC_FLAG_IWDGRST, RCC_FLAG_WWDGRST, RCC_FLAG_LPWRRST

Parameters

None

Return values

None

Definition at line 1371 of file stm32f10x_rcc.c.

void RCC_ClearITPendingBit

(

uint8_t

RCC_IT)

Clears the RCC's interrupt pending bits.

Parameters

RCC_IT,:

specifies the interrupt pending bit to clear.

For STM32_Connectivity_line_devices, this parameter can be any combination of the following values:

• RCC_IT_LSIRDY: LSI ready interrupt
• RCC_IT_LSERDY: LSE ready interrupt
• RCC_IT_HSIRDY: HSI ready interrupt
• RCC_IT_HSERDY: HSE ready interrupt
• RCC_IT_PLLRDY: PLL ready interrupt
• RCC_IT_PLL2RDY: PLL2 ready interrupt
• RCC_IT_PLL3RDY: PLL3 ready interrupt
• RCC_IT_CSS: Clock Security System interrupt

For other_STM32_devices, this parameter can be any combination of the following values:

• RCC_IT_LSIRDY: LSI ready interrupt
• RCC_IT_LSERDY: LSE ready interrupt
• RCC_IT_HSIRDY: HSI ready interrupt
• RCC_IT_HSERDY: HSE ready interrupt
• RCC_IT_PLLRDY: PLL ready interrupt

• RCC_IT_CSS: Clock Security System interrupt

  Return values

  None

Definition at line 1448 of file stm32f10x_rcc.c.

void RCC_ClockSecuritySystemCmd

(

FunctionalState

NewState)

Enables or disables the Clock Security System.

Parameters

NewState,:

new state of the Clock Security System.. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 1250 of file stm32f10x_rcc.c.

void RCC_DeInit

(

void

)

Resets the RCC clock configuration to the default reset state.

Parameters

None

Return values

None

Definition at line 217 of file stm32f10x_rcc.c.

void RCC_GetClocksFreq

(

RCC_ClocksTypeDef *

RCC_Clocks)

Returns the frequencies of different on chip clocks.

Parameters

RCC_Clocks,:

pointer to a RCC_ClocksTypeDef structure which will hold the clocks frequencies.

Note

The result of this function could be not correct when using fractional value for HSE crystal.

Return values

None

Definition at line 908 of file stm32f10x_rcc.c.

FlagStatus RCC_GetFlagStatus

(

uint8_t

RCC_FLAG)

Checks whether the specified RCC flag is set or not.

Parameters

RCC_FLAG,:

specifies the flag to check.

For STM32_Connectivity_line_devices, this parameter can be one of the following values:

• RCC_FLAG_HSIRDY: HSI oscillator clock ready
• RCC_FLAG_HSERDY: HSE oscillator clock ready
• RCC_FLAG_PLLRDY: PLL clock ready
• RCC_FLAG_PLL2RDY: PLL2 clock ready
• RCC_FLAG_PLL3RDY: PLL3 clock ready
• RCC_FLAG_LSERDY: LSE oscillator clock ready
• RCC_FLAG_LSIRDY: LSI oscillator clock ready
• RCC_FLAG_PINRST: Pin reset
• RCC_FLAG_PORRST: POR/PDR reset
• RCC_FLAG_SFTRST: Software reset
• RCC_FLAG_IWDGRST: Independent Watchdog reset
• RCC_FLAG_WWDGRST: Window Watchdog reset
• RCC_FLAG_LPWRRST: Low Power reset

For other_STM32_devices, this parameter can be one of the following values:

• RCC_FLAG_HSIRDY: HSI oscillator clock ready
• RCC_FLAG_HSERDY: HSE oscillator clock ready
• RCC_FLAG_PLLRDY: PLL clock ready
• RCC_FLAG_LSERDY: LSE oscillator clock ready
• RCC_FLAG_LSIRDY: LSI oscillator clock ready
• RCC_FLAG_PINRST: Pin reset
• RCC_FLAG_PORRST: POR/PDR reset
• RCC_FLAG_SFTRST: Software reset
• RCC_FLAG_IWDGRST: Independent Watchdog reset
• RCC_FLAG_WWDGRST: Window Watchdog reset
• RCC_FLAG_LPWRRST: Low Power reset

Return values

The	new state of RCC_FLAG (SET or RESET).

Definition at line 1326 of file stm32f10x_rcc.c.

ITStatus RCC_GetITStatus

(

uint8_t

RCC_IT)

Checks whether the specified RCC interrupt has occurred or not.

Parameters

RCC_IT,:

specifies the RCC interrupt source to check.

For STM32_Connectivity_line_devices, this parameter can be one of the following values:

• RCC_IT_LSIRDY: LSI ready interrupt
• RCC_IT_LSERDY: LSE ready interrupt
• RCC_IT_HSIRDY: HSI ready interrupt
• RCC_IT_HSERDY: HSE ready interrupt
• RCC_IT_PLLRDY: PLL ready interrupt
• RCC_IT_PLL2RDY: PLL2 ready interrupt
• RCC_IT_PLL3RDY: PLL3 ready interrupt
• RCC_IT_CSS: Clock Security System interrupt

For other_STM32_devices, this parameter can be one of the following values:

• RCC_IT_LSIRDY: LSI ready interrupt
• RCC_IT_LSERDY: LSE ready interrupt
• RCC_IT_HSIRDY: HSI ready interrupt
• RCC_IT_HSERDY: HSE ready interrupt
• RCC_IT_PLLRDY: PLL ready interrupt
• RCC_IT_CSS: Clock Security System interrupt

Return values

The	new state of RCC_IT (SET or RESET).

Definition at line 1402 of file stm32f10x_rcc.c.

uint8_t RCC_GetSYSCLKSource

(

void

)

Returns the clock source used as system clock.

Parameters

None

Return values

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

Definition at line 587 of file stm32f10x_rcc.c.

void RCC_HCLKConfig

(

uint32_t

RCC_SYSCLK)

Configures the AHB clock (HCLK).

Parameters

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: RCC_SYSCLK_Div1: AHB clock = SYSCLK RCC_SYSCLK_Div2: AHB clock = SYSCLK/2 RCC_SYSCLK_Div4: AHB clock = SYSCLK/4 RCC_SYSCLK_Div8: AHB clock = SYSCLK/8 RCC_SYSCLK_Div16: AHB clock = SYSCLK/16 RCC_SYSCLK_Div64: AHB clock = SYSCLK/64 RCC_SYSCLK_Div128: AHB clock = SYSCLK/128 RCC_SYSCLK_Div256: AHB clock = SYSCLK/256 RCC_SYSCLK_Div512: AHB clock = SYSCLK/512

Return values

None

Definition at line 608 of file stm32f10x_rcc.c.

void RCC_HSEConfig

(

uint32_t

RCC_HSE)

Configures the External High Speed oscillator (HSE).

Note

HSE can not be stopped if it is used directly or through the PLL as system clock.

Parameters

RCC_HSE,:

specifies the new state of the HSE. This parameter can be one of the following values: RCC_HSE_OFF: HSE oscillator OFF RCC_HSE_ON: HSE oscillator ON RCC_HSE_Bypass: HSE oscillator bypassed with external clock

Return values

None

Definition at line 270 of file stm32f10x_rcc.c.

void RCC_HSICmd

(

FunctionalState

NewState)

Enables or disables the Internal High Speed oscillator (HSI).

Note

HSI can not be stopped if it is used directly or through the PLL as system clock.

Parameters

NewState,:

new state of the HSI. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 354 of file stm32f10x_rcc.c.

void RCC_ITConfig	(	uint8_t	RCC_IT,
		FunctionalState	NewState
	)

Enables or disables the specified RCC interrupts.

Parameters

RCC_IT,:

specifies the RCC interrupt sources to be enabled or disabled.

For STM32_Connectivity_line_devices, this parameter can be any combination of the following values

• RCC_IT_LSIRDY: LSI ready interrupt
• RCC_IT_LSERDY: LSE ready interrupt
• RCC_IT_HSIRDY: HSI ready interrupt
• RCC_IT_HSERDY: HSE ready interrupt
• RCC_IT_PLLRDY: PLL ready interrupt
• RCC_IT_PLL2RDY: PLL2 ready interrupt
• RCC_IT_PLL3RDY: PLL3 ready interrupt

For other_STM32_devices, this parameter can be any combination of the following values

• RCC_IT_LSIRDY: LSI ready interrupt
• RCC_IT_LSERDY: LSE ready interrupt
• RCC_IT_HSIRDY: HSI ready interrupt
• RCC_IT_HSERDY: HSE ready interrupt
• RCC_IT_PLLRDY: PLL ready interrupt

Parameters

NewState,:

new state of the specified RCC interrupts. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 700 of file stm32f10x_rcc.c.

void RCC_LSEConfig

(

uint8_t

RCC_LSE)

Configures the External Low Speed oscillator (LSE).

Parameters

RCC_LSE,:

specifies the new state of the LSE. This parameter can be one of the following values: RCC_LSE_OFF: LSE oscillator OFF RCC_LSE_ON: LSE oscillator ON RCC_LSE_Bypass: LSE oscillator bypassed with external clock

Return values

None

Definition at line 829 of file stm32f10x_rcc.c.

void RCC_LSICmd

(

FunctionalState

NewState)

Enables or disables the Internal Low Speed oscillator (LSI).

Note

LSI can not be disabled if the IWDG is running.

Parameters

NewState,:

new state of the LSI. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 862 of file stm32f10x_rcc.c.

void RCC_MCOConfig

(

uint8_t

RCC_MCO)

Selects the clock source to output on MCO pin.

Parameters

RCC_MCO,:

specifies the clock source to output.

For STM32_Connectivity_line_devices, this parameter can be one of the following values:

• RCC_MCO_NoClock: No clock selected
• RCC_MCO_SYSCLK: System clock selected
• RCC_MCO_HSI: HSI oscillator clock selected
• RCC_MCO_HSE: HSE oscillator clock selected
• RCC_MCO_PLLCLK_Div2: PLL clock divided by 2 selected
• RCC_MCO_PLL2CLK: PLL2 clock selected
• RCC_MCO_PLL3CLK_Div2: PLL3 clock divided by 2 selected
• RCC_MCO_XT1: External 3-25 MHz oscillator clock selected
• RCC_MCO_PLL3CLK: PLL3 clock selected

For other_STM32_devices, this parameter can be one of the following values:

• RCC_MCO_NoClock: No clock selected
• RCC_MCO_SYSCLK: System clock selected
• RCC_MCO_HSI: HSI oscillator clock selected
• RCC_MCO_HSE: HSE oscillator clock selected
• RCC_MCO_PLLCLK_Div2: PLL clock divided by 2 selected

Return values

None

Definition at line 1282 of file stm32f10x_rcc.c.

void RCC_PCLK1Config

(

uint32_t

RCC_HCLK)

Configures the Low Speed APB clock (PCLK1).

Parameters

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: RCC_HCLK_Div1: APB1 clock = HCLK RCC_HCLK_Div2: APB1 clock = HCLK/2 RCC_HCLK_Div4: APB1 clock = HCLK/4 RCC_HCLK_Div8: APB1 clock = HCLK/8 RCC_HCLK_Div16: APB1 clock = HCLK/16

Return values

None

Definition at line 634 of file stm32f10x_rcc.c.

void RCC_PCLK2Config

(

uint32_t

RCC_HCLK)

Configures the High Speed APB clock (PCLK2).

Parameters

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: RCC_HCLK_Div1: APB2 clock = HCLK RCC_HCLK_Div2: APB2 clock = HCLK/2 RCC_HCLK_Div4: APB2 clock = HCLK/4 RCC_HCLK_Div8: APB2 clock = HCLK/8 RCC_HCLK_Div16: APB2 clock = HCLK/16

Return values

None

Definition at line 660 of file stm32f10x_rcc.c.

void RCC_PLLCmd

(

FunctionalState

NewState)

Enables or disables the PLL.

Note

The PLL can not be disabled if it is used as system clock.

Parameters

NewState,:

new state of the PLL. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 401 of file stm32f10x_rcc.c.

void RCC_PLLConfig	(	uint32_t	RCC_PLLSource,
		uint32_t	RCC_PLLMul
	)

Configures the PLL clock source and multiplication factor.

Note

This function must be used only when the PLL is disabled.

Parameters

RCC_PLLSource,:

specifies the PLL entry clock source. For STM32_Connectivity_line_devices or STM32_Value_line_devices, this parameter can be one of the following values: RCC_PLLSource_HSI_Div2: HSI oscillator clock divided by 2 selected as PLL clock entry RCC_PLLSource_PREDIV1: PREDIV1 clock selected as PLL clock entry For other_STM32_devices, this parameter can be one of the following values: RCC_PLLSource_HSI_Div2: HSI oscillator clock divided by 2 selected as PLL clock entry RCC_PLLSource_HSE_Div1: HSE oscillator clock selected as PLL clock entry RCC_PLLSource_HSE_Div2: HSE oscillator clock divided by 2 selected as PLL clock entry

RCC_PLLMul,:

specifies the PLL multiplication factor. For STM32_Connectivity_line_devices, this parameter can be RCC_PLLMul_x where x:{[4,9], 6_5} For other_STM32_devices, this parameter can be RCC_PLLMul_x where x:[2,16]

Return values

None

Definition at line 378 of file stm32f10x_rcc.c.

void RCC_RTCCLKCmd

(

FunctionalState

NewState)

Enables or disables the RTC clock.

Note

This function must be used only after the RTC clock was selected using the RCC_RTCCLKConfig function.

Parameters

NewState,:

new state of the RTC clock. This parameter can be: ENABLE or DISABLE.

Return values

None

Definition at line 893 of file stm32f10x_rcc.c.

void RCC_RTCCLKConfig

(

uint32_t

RCC_RTCCLKSource)

Configures the RTC clock (RTCCLK).

Note

Once the RTC clock is selected it can't be changed unless the Backup domain is reset.

Parameters

RCC_RTCCLKSource,:

specifies the RTC clock source. This parameter can be one of the following values: RCC_RTCCLKSource_LSE: LSE selected as RTC clock RCC_RTCCLKSource_LSI: LSI selected as RTC clock RCC_RTCCLKSource_HSE_Div128: HSE clock divided by 128 selected as RTC clock

Return values

None

Definition at line 879 of file stm32f10x_rcc.c.

void RCC_SYSCLKConfig

(

uint32_t

RCC_SYSCLKSource)

Configures the system clock (SYSCLK).

Parameters

RCC_SYSCLKSource,:

specifies the clock source used as system clock. This parameter can be one of the following values: RCC_SYSCLKSource_HSI: HSI selected as system clock RCC_SYSCLKSource_HSE: HSE selected as system clock RCC_SYSCLKSource_PLLCLK: PLL selected as system clock

Return values

None

Definition at line 564 of file stm32f10x_rcc.c.

void RCC_USBCLKConfig

(

uint32_t

RCC_USBCLKSource)

Configures the USB clock (USBCLK).

Parameters

RCC_USBCLKSource,:

specifies the USB clock source. This clock is derived from the PLL output. This parameter can be one of the following values: RCC_USBCLKSource_PLLCLK_1Div5: PLL clock divided by 1,5 selected as USB clock source RCC_USBCLKSource_PLLCLK_Div1: PLL clock selected as USB clock source

Return values

None

Definition at line 728 of file stm32f10x_rcc.c.

ErrorStatus RCC_WaitForHSEStartUp

(

void

)

Waits for HSE start-up.

Parameters

None

Return values

An	ErrorStatus enumuration value: SUCCESS: HSE oscillator is stable and ready to use ERROR: HSE oscillator not yet ready

Definition at line 304 of file stm32f10x_rcc.c.