151 lines
5.1 KiB
C
151 lines
5.1 KiB
C
/**
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* \addtogroup stm32w-cpu
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*
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* @{
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*/
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/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
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* File Name : stm32w108_systick.c
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* Author : MCD Application Team
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* Version : V2.0.3
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* Date : 09/22/2008
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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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#include <stdint.h>
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#include "stm32w-systick.h"
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/* SysTick registers bit mask */
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/* CTRL TICKINT Mask */
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#define CTRL_TICKINT_Set ((uint32_t)0x00000002)
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#define CTRL_TICKINT_Reset ((uint32_t)0xFFFFFFFD)
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/*--------------------------------------------------------------------------*/
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/**
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* \brief Configures the SysTick clock source.
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* \param 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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*/
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void
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SysTick_CLKSourceConfig(uint32_t 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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SysTick->CTRL |= SysTick_CLKSource_HCLK;
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} else {
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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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/**
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* \brief Sets SysTick Reload value.
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* \param Reload SysTick Reload new value. Must be between 1 and 0xFFFFFF.
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*/
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void
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SysTick_SetReload(uint32_t 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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/**
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* \brief Enables or disables the SysTick counter.
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* \param 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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*/
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void
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SysTick_CounterCmd(uint32_t 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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SysTick->CTRL |= SysTick_Counter_Enable;
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} else if(SysTick_Counter == SysTick_Counter_Disable) {
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SysTick->CTRL &= SysTick_Counter_Disable;
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} else { /* SysTick_Counter == SysTick_Counter_Clear */
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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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/**
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* \brief Enables or disables the SysTick Interrupt.
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* \param NewState new state of the SysTick Interrupt.
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* This parameter can be: ENABLE or DISABLE.
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*/
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void
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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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SysTick->CTRL |= CTRL_TICKINT_Set;
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} else {
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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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/**
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* \brief Gets SysTick counter value.
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* \return SysTick current value
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*/
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uint32_t
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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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/**
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* \brief Checks whether the specified SysTick flag is set or not.
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* \param 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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*/
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FlagStatus
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SysTick_GetFlagStatus(uint8_t SysTick_FLAG)
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{
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uint32_t 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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statusreg = SysTick->CTRL;
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} else { /* The flag to check is in CALIB register */
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statusreg = SysTick->CALIB;
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}
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if((statusreg & ((uint32_t) 1 << SysTick_FLAG)) != (uint32_t) RESET) {
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bitstatus = SET;
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} else {
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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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/** @} */
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