stm8l15x_clk.c File Reference

This file provides firmware functions to manage the following functionalities of the clock controler (CLK) peripheral:

• Internal/external clocks, CSS and CCO configuration
• System clocks configuration
• Peripheral clocks configuration
• CSS on LSE configuration
• Low power clock configuration
• Interrupts and flags management.

More...

#include "stm8l15x_clk.h"

Go to the source code of this file.

Functions
void	CLK_AdjustHSICalibrationValue (uint8_t CLK_HSICalibrationValue)
	Adjusts the Internal High Speed oscillator (HSI) calibration value.
void	CLK_BEEPClockConfig (CLK_BEEPCLKSource_TypeDef CLK_BEEPCLKSource)
	Configures the BEEP clock (BEEPCLK).
void	CLK_CCOConfig (CLK_CCOSource_TypeDef CLK_CCOSource, CLK_CCODiv_TypeDef CLK_CCODiv)
	Selects the clock source to output on CCO pin(PC4).
void	CLK_ClearFlag (void)
	Clears the CSS LSE Flag.
void	CLK_ClearITPendingBit (CLK_IT_TypeDef CLK_IT)
	Clears the CLK's interrupt pending bits.
void	CLK_ClockSecuritySystemEnable (void)
	Enables the Clock Security System.
void	CLK_ClockSecuritySytemDeglitchCmd (FunctionalState NewState)
	Enables the Clock Security System deglitcher system.
void	CLK_DeInit (void)
	Deinitializes the CLK peripheral registers to their default reset values.
uint32_t	CLK_GetClockFreq (void)
	Returns the frequencies of different the SYSCLK.
FlagStatus	CLK_GetFlagStatus (CLK_FLAG_TypeDef CLK_FLAG)
	Checks whether the specified CLK flag is set or not.
ITStatus	CLK_GetITStatus (CLK_IT_TypeDef CLK_IT)
	Checks whether the specified CLK interrupt has occurred or not.
CLK_SYSCLKSource_TypeDef	CLK_GetSYSCLKSource (void)
	Returns the clock source used as system clock.
void	CLK_HaltConfig (CLK_Halt_TypeDef CLK_Halt, FunctionalState NewState)
	Configures clock during halt and active halt modes.
void	CLK_HSEConfig (CLK_HSE_TypeDef CLK_HSE)
	Configures the External High Speed oscillator (HSE).
void	CLK_HSICmd (FunctionalState NewState)
	Enables or disables the Internal High Speed oscillator (HSI).
void	CLK_ITConfig (CLK_IT_TypeDef CLK_IT, FunctionalState NewState)
	Enables or disables the specified CLK interrupts.
void	CLK_LSEClockSecuritySystemEnable (void)
	Enables the clock CSS on LSE.
void	CLK_LSEConfig (CLK_LSE_TypeDef CLK_LSE)
	Configures the External Low Speed oscillator (LSE).
void	CLK_LSICmd (FunctionalState NewState)
	Enables or disables the Internal Low Speed oscillator (LSI).
void	CLK_MainRegulatorCmd (FunctionalState NewState)
	Configures the main voltage regulator.
void	CLK_PeripheralClockConfig (CLK_Peripheral_TypeDef CLK_Peripheral, FunctionalState NewState)
	Enables or disables the specified peripheral clock.
void	CLK_RTCCLKSwitchOnLSEFailureEnable (void)
	Enables RTC clock switch to LSI in case of LSE failure.
void	CLK_RTCClockConfig (CLK_RTCCLKSource_TypeDef CLK_RTCCLKSource, CLK_RTCCLKDiv_TypeDef CLK_RTCCLKDiv)
	Configures the RTC clock (RTCCLK).
void	CLK_SYSCLKDivConfig (CLK_SYSCLKDiv_TypeDef CLK_SYSCLKDiv)
	Configures the System clock (SYSCLK) dividers.
void	CLK_SYSCLKSourceConfig (CLK_SYSCLKSource_TypeDef CLK_SYSCLKSource)
	Configures the system clock (SYSCLK).
void	CLK_SYSCLKSourceSwitchCmd (FunctionalState NewState)
	Enables or disables the clock switch execution.
Variables
CONST uint8_t	SYSDivFactor [5] = {1, 2, 4, 8, 16}

---

Detailed Description

This file provides firmware functions to manage the following functionalities of the clock controler (CLK) peripheral:

• Internal/external clocks, CSS and CCO configuration
• System clocks configuration
• Peripheral clocks configuration
• CSS on LSE configuration
• Low power clock configuration
• Interrupts and flags management.

Author:

MCD Application Team

Version:

V1.5.0

Date:

13-May-2011

  *               
  *          ===================================================================
  *                               CLK specific features
  *          ===================================================================
  *    
  *          After reset the device is running from Internal High Speed oscillator
  *          divided by 8 (HSI/8 = 2MHz) with all peripherals off.
  *           - The clock for all peripherals is switched off, except for the BootROM 
  *             clock used for bootloader, in which case, the software should be properly 
  *             written to switch off that clock after the bootloader execution.     
  *
  *          Once the device starts from reset, the user application has to:
  *           - Configure the clock source to be used to drive the System clock
  *             (if the application needs higher frequency/performance)
  *           - Configure the System clock frequency  
  *           - Enable the clock for the peripheral(s) to be used
  *           - Configure the clock source(s) for peripherals which clocks are not
  *             derived from the System clock (RTC/LCD, BEEP)
  *
  *  

Attention:

THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.

© COPYRIGHT 2011 STMicroelectronics

Definition in file stm8l15x_clk.c.