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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [CORTEX_STM32F103_GCC_Rowley/] [ST Library/] [src/] [stm32f10x_systick.c] - Blame information for rev 582

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1 582 jeremybenn 
/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
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* File Name          : stm32f10x_systick.c
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* Author             : MCD Application Team
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* Version            : V2.0.1
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* Date               : 06/13/2008
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* Description        : This file provides all the SysTick firmware functions.
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********************************************************************************
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
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* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
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* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
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* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
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* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*******************************************************************************/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f10x_systick.h"
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* ---------------------- SysTick registers bit mask -------------------- */
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/* CTRL TICKINT Mask */
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#define CTRL_TICKINT_Set      ((u32)0x00000002)
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#define CTRL_TICKINT_Reset    ((u32)0xFFFFFFFD)
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/*******************************************************************************
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* Function Name  : SysTick_CLKSourceConfig
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* Description    : Configures the SysTick clock source.
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* Input          : - SysTick_CLKSource: specifies the SysTick clock source.
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*                    This parameter can be one of the following values:
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*                       - SysTick_CLKSource_HCLK_Div8: AHB clock divided by 8
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*                         selected as SysTick clock source.
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*                       - SysTick_CLKSource_HCLK: AHB clock selected as
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*                         SysTick clock source.
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* Output         : None
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* Return         : None
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*******************************************************************************/
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void SysTick_CLKSourceConfig(u32 SysTick_CLKSource)
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{
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  /* Check the parameters */
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  assert_param(IS_SYSTICK_CLK_SOURCE(SysTick_CLKSource));
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  if (SysTick_CLKSource == SysTick_CLKSource_HCLK)
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  {
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    SysTick->CTRL |= SysTick_CLKSource_HCLK;
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  }
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  else
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  {
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    SysTick->CTRL &= SysTick_CLKSource_HCLK_Div8;
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  }
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}
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/*******************************************************************************
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* Function Name  : SysTick_SetReload
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* Description    : Sets SysTick Reload value.
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* Input          : - Reload: SysTick Reload new value.
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*                    This parameter must be a number between 1 and 0xFFFFFF.
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* Output         : None
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* Return         : None
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*******************************************************************************/
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void SysTick_SetReload(u32 Reload)
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{
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  /* Check the parameters */
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  assert_param(IS_SYSTICK_RELOAD(Reload));
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  SysTick->LOAD = Reload;
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}
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/*******************************************************************************
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* Function Name  : SysTick_CounterCmd
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* Description    : Enables or disables the SysTick counter.
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* Input          : - SysTick_Counter: new state of the SysTick counter.
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*                    This parameter can be one of the following values:
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*                       - SysTick_Counter_Disable: Disable counter
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*                       - SysTick_Counter_Enable: Enable counter
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*                       - SysTick_Counter_Clear: Clear counter value to 0
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* Output         : None
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* Return         : None
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*******************************************************************************/
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void SysTick_CounterCmd(u32 SysTick_Counter)
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{
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  /* Check the parameters */
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  assert_param(IS_SYSTICK_COUNTER(SysTick_Counter));
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  if (SysTick_Counter == SysTick_Counter_Enable)
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  {
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    SysTick->CTRL |= SysTick_Counter_Enable;
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  }
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  else if (SysTick_Counter == SysTick_Counter_Disable)
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  {
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    SysTick->CTRL &= SysTick_Counter_Disable;
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  }
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  else /* SysTick_Counter == SysTick_Counter_Clear */
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  {
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    SysTick->VAL = SysTick_Counter_Clear;
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  }
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}
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/*******************************************************************************
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* Function Name  : SysTick_ITConfig
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* Description    : Enables or disables the SysTick Interrupt.
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* Input          : - NewState: new state of the SysTick Interrupt.
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*                    This parameter can be: ENABLE or DISABLE.
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* Output         : None
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* Return         : None
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*******************************************************************************/
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void SysTick_ITConfig(FunctionalState NewState)
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{
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  /* Check the parameters */
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  assert_param(IS_FUNCTIONAL_STATE(NewState));
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  if (NewState != DISABLE)
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  {
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    SysTick->CTRL |= CTRL_TICKINT_Set;
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  }
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  else
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  {
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    SysTick->CTRL &= CTRL_TICKINT_Reset;
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  }
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}
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/*******************************************************************************
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* Function Name  : SysTick_GetCounter
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* Description    : Gets SysTick counter value.
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* Input          : None
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* Output         : None
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* Return         : SysTick current value
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*******************************************************************************/
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u32 SysTick_GetCounter(void)
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{
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  return(SysTick->VAL);
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}
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/*******************************************************************************
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* Function Name  : SysTick_GetFlagStatus
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* Description    : Checks whether the specified SysTick flag is set or not.
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* Input          : - SysTick_FLAG: specifies the flag to check.
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*                    This parameter can be one of the following values:
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*                       - SysTick_FLAG_COUNT
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*                       - SysTick_FLAG_SKEW
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*                       - SysTick_FLAG_NOREF
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* Output         : None
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* Return         : None
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*******************************************************************************/
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FlagStatus SysTick_GetFlagStatus(u8 SysTick_FLAG)
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{
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  u32 statusreg = 0, tmp = 0 ;
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  FlagStatus bitstatus = RESET;
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  /* Check the parameters */
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  assert_param(IS_SYSTICK_FLAG(SysTick_FLAG));
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  /* Get the SysTick register index */
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  tmp = SysTick_FLAG >> 3;
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  if (tmp == 2) /* The flag to check is in CTRL register */
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  {
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    statusreg = SysTick->CTRL;
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  }
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  else          /* The flag to check is in CALIB register */
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  {
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    statusreg = SysTick->CALIB;
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  }
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  if ((statusreg & ((u32)1 << SysTick_FLAG)) != (u32)RESET)
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  {
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    bitstatus = SET;
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  }
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  else
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  {
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    bitstatus = RESET;
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  }
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  return bitstatus;
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}
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/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/

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