contiki/cpu/stm32w108/dev/stm32w-systick.c

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/**
* \addtogroup stm32w-cpu
*
* @{
*/
/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : stm32w108_systick.c
* Author : MCD Application Team
* Version : V2.0.3
* Date : 09/22/2008
* Description : This file provides all the SysTick firmware functions.
********************************************************************************
* 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.
*******************************************************************************/
#include <stdint.h>
#include "stm32w-systick.h"
/* SysTick registers bit mask */
/* CTRL TICKINT Mask */
#define CTRL_TICKINT_Set ((uint32_t)0x00000002)
#define CTRL_TICKINT_Reset ((uint32_t)0xFFFFFFFD)
/*--------------------------------------------------------------------------*/
/**
* \brief Configures the SysTick clock source.
* \param SysTick_CLKSource specifies the SysTick clock source.
* This parameter can be one of the following values:
* SysTick_CLKSource_HCLK_Div8: AHB clock divided by 8
* selected as SysTick clock source.
* SysTick_CLKSource_HCLK: AHB clock selected as
* SysTick clock source.
*/
void
SysTick_CLKSourceConfig(uint32_t SysTick_CLKSource)
{
/* Check the parameters */
assert_param(IS_SYSTICK_CLK_SOURCE(SysTick_CLKSource));
if(SysTick_CLKSource == SysTick_CLKSource_HCLK) {
SysTick->CTRL |= SysTick_CLKSource_HCLK;
} else {
SysTick->CTRL &= SysTick_CLKSource_HCLK_Div8;
}
}
/*--------------------------------------------------------------------------*/
/**
* \brief Sets SysTick Reload value.
* \param Reload SysTick Reload new value. Must be between 1 and 0xFFFFFF.
*/
void
SysTick_SetReload(uint32_t Reload)
{
/* Check the parameters */
assert_param(IS_SYSTICK_RELOAD(Reload));
SysTick->LOAD = Reload;
}
/*--------------------------------------------------------------------------*/
/**
* \brief Enables or disables the SysTick counter.
* \param SysTick_Counter new state of the SysTick counter.
* This parameter can be one of the following values:
* - SysTick_Counter_Disable: Disable counter
* - SysTick_Counter_Enable: Enable counter
* - SysTick_Counter_Clear: Clear counter value to 0
*/
void
SysTick_CounterCmd(uint32_t SysTick_Counter)
{
/* Check the parameters */
assert_param(IS_SYSTICK_COUNTER(SysTick_Counter));
if(SysTick_Counter == SysTick_Counter_Enable) {
SysTick->CTRL |= SysTick_Counter_Enable;
} else if(SysTick_Counter == SysTick_Counter_Disable) {
SysTick->CTRL &= SysTick_Counter_Disable;
} else { /* SysTick_Counter == SysTick_Counter_Clear */
SysTick->VAL = SysTick_Counter_Clear;
}
}
/*--------------------------------------------------------------------------*/
/**
* \brief Enables or disables the SysTick Interrupt.
* \param NewState new state of the SysTick Interrupt.
* This parameter can be: ENABLE or DISABLE.
*/
void
SysTick_ITConfig(FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_FUNCTIONAL_STATE(NewState));
if(NewState != DISABLE) {
SysTick->CTRL |= CTRL_TICKINT_Set;
} else {
SysTick->CTRL &= CTRL_TICKINT_Reset;
}
}
/*--------------------------------------------------------------------------*/
/**
* \brief Gets SysTick counter value.
* \return SysTick current value
*/
uint32_t
SysTick_GetCounter(void)
{
return (SysTick->VAL);
}
/*--------------------------------------------------------------------------*/
/**
* \brief Checks whether the specified SysTick flag is set or not.
* \param SysTick_FLAG specifies the flag to check.
* This parameter can be one of the following values:
* - SysTick_FLAG_COUNT
* - SysTick_FLAG_SKEW
* - SysTick_FLAG_NOREF
*/
FlagStatus
SysTick_GetFlagStatus(uint8_t SysTick_FLAG)
{
uint32_t statusreg = 0, tmp = 0;
FlagStatus bitstatus = RESET;
/* Check the parameters */
assert_param(IS_SYSTICK_FLAG(SysTick_FLAG));
/* Get the SysTick register index */
tmp = SysTick_FLAG >> 3;
if(tmp == 2) { /* The flag to check is in CTRL register */
statusreg = SysTick->CTRL;
} else { /* The flag to check is in CALIB register */
statusreg = SysTick->CALIB;
}
if((statusreg & ((uint32_t) 1 << SysTick_FLAG)) != (uint32_t) RESET) {
bitstatus = SET;
} else {
bitstatus = RESET;
}
return bitstatus;
}
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
/** @} */