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stm32f4xx_lptim.c
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/**
******************************************************************************
* @file stm32f4xx_lptim.c
* @author MCD Application Team
* @version V1.8.0
* @date 04-November-2016
* @brief This file provides firmware functions to manage the following
* functionalities of the Low Power Timer (LPT) peripheral:
* + Initialization functions.
* + Configuration functions.
* + Interrupts and flags management functions.
*
* @verbatim
*
================================================================================
##### How to use this driver #####
================================================================================
Basic configuration:
--------------------
- Configure the clock source, the prescaler, the waveform shape and
the output polarity by filling the "LPTIM_InitTypeDef" structure and
calling LPTIM_Init.
- If the ULPTIM source is selected as clock source, configure the digital
Glitch filter by setting the number of consecutive samples
to be detected by using LPTIM_ConfigClockGlitchFilter.
- To select a software start use LPTIM_SelectSoftwareStart.
- To select an external trigger for the start of the counter, configure
the source and its active edge polarity by calling
LPTIM_ConfigExternalTrigger. Configure the Digital Glitch filter for
the external triggers by setting the number of consecutive samples
to be detected by using LPTIM_ConfigTriggerGlitchFilter.
- Select the operating mode of the peripheral by using
LPTIM_SelectOperatingMode, 2 modes can be selected:
+ Continuous mode: the timer is free running, the timer is started
from a trigger event and never stops until the timer is disabled
+ One shot mode: the timer is started from a trigger event and
stops when reaching the auto-reload value.
- Use LPTIM_SetAutoreloadValue to set the auto-reload value and
LPTIM_SetCompareValue to set the compare value.
- Configure the preload mode by using LPTIM_ConfigUpdate function. 2 modes
are available:
+ The Autoreload and compare registers are updated immediately after
APB write.
+ The Autoreload and compare registers are updated at the end of
counter period.
- Enable the peripheral by calling LPTIM_Cmd.
Encoder mode:
-------------
- To select the encoder feature, use the function: LPTIM_SelectEncoderMode.
- To select on which edge (Rising edge, falling edge or both edges)
the counter is incremented, use LPTIM_SelectClockPolarity.
Counter mode:
-------------
- Use LPTIM_SelectCounterMode to select the counting mode. In this mode
the counter is incremented on each valid event on ULPTIM.
Timeout function:
-----------------
In this case, the trigger will reset the timer. The first trigger event
will start the timer, any successive trigger event will reset the counter
and the timer restarts.
- To active this feature use LPTIM_TimoutCmd.
Interrupt configuration:
------------------------
- Use LPTIM_ITConfig to configure an interruption.
- Call LPTIM_GetFlagStatus to get a flag status.
- Call LPTIM_GetITStatus to get an interrupt status.
- Use LPTIM_ClearFlag to clear a flag.
@endverbatim
*
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT 2016 STMicroelectronics</center></h2>
*
* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.st.com/software_license_agreement_liberty_v2
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_lptim.h"
/** @addtogroup STM32F4xx_StdPeriph_Driver
* @{
*/
/** @defgroup LPTIM
* @brief LPTIM driver modules
* @{
*/
#if defined(STM32F410xx) || defined(STM32F413_423xx)
/* External variables --------------------------------------------------------*/
/* Private typedef -----------------------------------------------------------*/
/* Private defines -----------------------------------------------------------*/
#define CFGR_INIT_CLEAR_MASK ((uint32_t) 0xFFCFF1FE)
#define CFGR_TRIG_AND_POL_CLEAR_MASK ((uint32_t) 0xFFF91FFF)
/* Private macros ------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/** @defgroup LPTIM_Private_Functions
* @{
*/
/** @defgroup LPTIM_Group1 Initialization functions
* @brief Initialization functions
*
@verbatim
===============================================================================
Initialization functions
===============================================================================
This section provides functions allowing to:
- Deinitialize the LPTimer
- Initialize the Clock source, the Prescaler, the Ouput Waveform shape and Polarity
- Initialize the member of LPTIM_InitStruct structer with default value
@endverbatim
* @{
*/
/**
* @brief Deinitializes the LPTIMx peripheral registers to their default reset values.
* @param LPTIMx: where x can be 1.
* @retval None
*
*/
void LPTIM_DeInit(LPTIM_TypeDef* LPTIMx)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
/* Deinitializes the LPTIM1 peripheral */
if(LPTIMx == LPTIM1)
{
RCC_APB1PeriphResetCmd(RCC_APB1Periph_LPTIM1, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_LPTIM1, DISABLE);
}
}
/**
* @brief Initializes the LPTIMx peripheral according to the specified parameters
* in the LPTIM_InitStruct.
* @param LPTIMx: where x can be 1.
* @param LPTIM_InitStruct: pointer to an LPTIM_InitTypeDef structure that contains
* the configuration information for the specified LPTIM peripheral.
* @retval None
*
* @note It is mandatory to disable the peripheral to use this function.
*/
void LPTIM_Init(LPTIM_TypeDef* LPTIMx, LPTIM_InitTypeDef* LPTIM_InitStruct)
{
uint32_t tmpreg1 = 0;
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_LPTIM_CLOCK_SOURCE(LPTIM_InitStruct->LPTIM_ClockSource));
assert_param(IS_LPTIM_CLOCK_PRESCALER(LPTIM_InitStruct->LPTIM_Prescaler));
assert_param(IS_LPTIM_WAVEFORM(LPTIM_InitStruct->LPTIM_Waveform));
assert_param(IS_LPTIM_OUTPUT_POLARITY(LPTIM_InitStruct->LPTIM_OutputPolarity));
/* Get the LPTIMx CFGR value */
tmpreg1 = LPTIMx->CFGR;
/* Clear CKSEL, PRESC, WAVE and WAVEPOL bits */
tmpreg1 &= CFGR_INIT_CLEAR_MASK;
/* Set or Reset CKSEL bit according to LPTIM_ClockSource value */
/* Set or Reset PRESC bits according to LPTIM_Prescaler value */
/* Set or Reset WAVE bit according to LPTIM_Waveform value */
/* Set or Reset WAVEPOL bit according to LPTIM_OutputPolarity value */
tmpreg1 |= (LPTIM_InitStruct->LPTIM_ClockSource | LPTIM_InitStruct->LPTIM_Prescaler
|LPTIM_InitStruct->LPTIM_Waveform | LPTIM_InitStruct->LPTIM_OutputPolarity);
/* Write to LPTIMx CFGR */
LPTIMx->CFGR = tmpreg1;
}
/**
* @brief Fills each LPTIM_InitStruct member with its default value.
* @param LPTIM_InitStruct : pointer to a LPTIM_InitTypeDef structure which will be initialized.
* @retval None
*/
void LPTIM_StructInit(LPTIM_InitTypeDef* LPTIM_InitStruct)
{
/* APB Clock/Low Power oscillators is selected as default Clock source*/
LPTIM_InitStruct->LPTIM_ClockSource = LPTIM_ClockSource_APBClock_LPosc;
/* High Polarity is selected as default polarity */
LPTIM_InitStruct->LPTIM_OutputPolarity = LPTIM_OutputPolarity_High;
/* DIV=1 is selected as default prescaler */
LPTIM_InitStruct->LPTIM_Prescaler = LPTIM_Prescaler_DIV1;
/* PWM/One pulse mode is selected as default Waveform shape */
LPTIM_InitStruct->LPTIM_Waveform = LPTIM_Waveform_PWM_OnePulse;
}
/**
* @}
*/
/** @defgroup LPTIM_Group2 Configuration functions
* @brief Configuration functions
*
@verbatim
===============================================================================
Configuration functions
===============================================================================
This section provides functions allowing to configure the Low Power Timer:
- Select the Clock source.
- Configure the Glitch filter for the external clock and the external clock.
- Configure the prescaler of the counter.
- Select the Trigger source of the counter.
- Configure the operating mode (Single or Continuous mode).
- Select the Waveform shape (PWM/One Pulse or Set once) and polarity.
- Enable or disable the Encoder mode and the Timeout function.
- Write on the Autoreload and the Compare registers and configure the
preload mode.
- Get the Counter value.
- Enable or disable the peripheral.
@endverbatim
* @{
*/
/**
* @brief Enables or disables the specified LPTIM peripheral.
* @param LPTIMx: where x can be 1.
* @param NewState: new state of the LPTIMx peripheral.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void LPTIM_Cmd(LPTIM_TypeDef* LPTIMx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if(NewState != DISABLE)
{
/* Set the ENABLE bit */
LPTIMx->CR |= LPTIM_CR_ENABLE;
}
else
{
/* Reset the ENABLE bit */
LPTIMx->CR &= ~(LPTIM_CR_ENABLE);
}
}
/**
* @brief Selects the Clock source of the LPTIM counter.
* @param LPTIMx: where x can be 1.
* @param LPTIM_ClockSource: the selected clock source.
* This parameter can be:
* @arg LPTIM_ClockSource_APBClock_LPosc : APB clock/LP oscillators selected
* @arg LPTIM_ClockSource_ULPTIM: ULPTIM (external input) selected
* @retval None
*
* @note It is mandatory to disable the peripheral to use this function.
*/
void LPTIM_SelectClockSource(LPTIM_TypeDef* LPTIMx, uint32_t LPTIM_ClockSource)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_LPTIM_CLOCK_SOURCE(LPTIM_ClockSource));
/* Clear the CKSEL bit */
LPTIMx->CFGR &= ~(LPTIM_CFGR_CKSEL);
/* Set or Reset the CKSEL bit */
LPTIMx->CFGR |= LPTIM_ClockSource;
}
/**
* @brief Configures the polarity of the edge to be used to count
* if the ULPTIM input is selected.
* @param LPTIMx: where x can be 1.
* @param LPTIM_ClockPolarity: the selected clock polarity.
* This parameter can be:
* @arg LPTIM_ClockPolarity_RisingEdge : Counter Clock = LPTIM Clock / 1
* @arg LPTIM_ClockPolarity_FallingEdge : Counter Clock = LPTIM Clock / 2
* @arg LPTIM_ClockPolarity_BothEdges : Counter Clock = LPTIM Clock / 4
* @retval None
*
* @note It is mandatory to disable the peripheral to use this function.
*/
void LPTIM_SelectULPTIMClockPolarity(LPTIM_TypeDef* LPTIMx, uint32_t LPTIM_ClockPolarity)
{
uint32_t tmpreg1 = 0;
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_LPTIM_CLOCK_POLARITY(LPTIM_ClockPolarity));
/* Get the LPTIMx CFGR value */
tmpreg1 = LPTIMx->CFGR;
/* Clear the CKPOL bits */
tmpreg1 &= ~(LPTIM_CFGR_CKPOL);
/* Set or Reset the PRESC bits */
tmpreg1 |= LPTIM_ClockPolarity;
/* Write to LPTIMx CFGR */
LPTIMx->CFGR = tmpreg1;
}
/**
* @brief Configures the Clock Prescaler.
* @param LPTIMx: where x can be 1.
* @param LPTIM_Prescaler: the selected clock prescaler.
* This parameter can be:
* @arg LPTIM_Prescaler_DIV1 : Counter Clock = LPTIM Clock / 1
* @arg LPTIM_Prescaler_DIV2 : Counter Clock = LPTIM Clock / 2
* @arg LPTIM_Prescaler_DIV4 : Counter Clock = LPTIM Clock / 4
* @arg LPTIM_Prescaler_DIV8 : Counter Clock = LPTIM Clock / 8
* @arg LPTIM_Prescaler_DIV16 : Counter Clock = LPTIM Clock / 16
* @arg LPTIM_Prescaler_DIV32 : Counter Clock = LPTIM Clock / 32
* @arg LPTIM_Prescaler_DIV64 : Counter Clock = LPTIM Clock / 64
* @arg LPTIM_Prescaler_DIV128 : Counter Clock = LPTIM Clock / 128
* @retval None
*
* @note It is mandatory to disable the peripheral to use this function.
*/
void LPTIM_ConfigPrescaler(LPTIM_TypeDef* LPTIMx, uint32_t LPTIM_Prescaler)
{
uint32_t tmpreg1 = 0;
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_LPTIM_CLOCK_PRESCALER(LPTIM_Prescaler));
/* Get the LPTIMx CFGR value */
tmpreg1 = LPTIMx->CFGR;
/* Clear the PRESC bits */
tmpreg1 &= ~(LPTIM_CFGR_PRESC);
/* Set or Reset the PRESC bits */
tmpreg1 |= LPTIM_Prescaler;
/* Write to LPTIMx CFGR */
LPTIMx->CFGR = tmpreg1;
}
/**
* @brief Selects the trigger source for the counter and its polarity.
* @param LPTIMx: where x can be 1.
* @param LPTIM_ExtTRGSource: the selected external trigger.
* This parameter can be:
* @arg LPTIM_ExtTRGSource_Trig0 : ext_trig0
* @arg LPTIM_ExtTRGSource_Trig1 : ext_trig1
* @arg LPTIM_ExtTRGSource_Trig2 : ext_trig2
* @arg LPTIM_ExtTRGSource_Trig3 : ext_trig3
* @arg LPTIM_ExtTRGSource_Trig4 : ext_trig4
* @arg LPTIM_ExtTRGSource_Trig5 : ext_trig5
* @arg LPTIM_ExtTRGSource_Trig6 : ext_trig6
* @arg LPTIM_ExtTRGSource_Trig7 : ext_trig7
* @param LPTIM_ExtTRGPolarity: the selected external trigger.
* This parameter can be:
* @arg LPTIM_ExtTRGPolarity_RisingEdge : Rising edge polarity selected
* @arg LPTIM_ExtTRGPolarity_FallingEdge : Falling edge polarity selected
* @arg LPTIM_ExtTRGPolarity_BothEdges : Both edges polarity selected
* @retval None
*
* @note It is mandatory to disable the peripheral to use this function.
*/
void LPTIM_ConfigExternalTrigger(LPTIM_TypeDef* LPTIMx, uint32_t LPTIM_ExtTRGSource, uint32_t LPTIM_ExtTRGPolarity)
{
uint32_t tmpreg1 = 0;
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_LPTIM_EXT_TRG_SOURCE(LPTIM_ExtTRGSource));
assert_param(IS_LPTIM_EXT_TRG_POLARITY(LPTIM_ExtTRGPolarity));
/* Get the LPTIMx CFGR value */
tmpreg1 = LPTIMx->CFGR;
/* Clear the TRIGEN and TRIGSEL bits */
tmpreg1 &= CFGR_TRIG_AND_POL_CLEAR_MASK;
/* Set or Reset the TRIGEN and TRIGSEL bits */
tmpreg1 |= (LPTIM_ExtTRGSource | LPTIM_ExtTRGPolarity);
/* Write to LPTIMx CFGR */
LPTIMx->CFGR = tmpreg1;
}
/**
* @brief Selects a software start of the counter.
* @param LPTIMx: where x can be 1.
* @retval None
*
* @note It is mandatory to disable the peripheral to use this function.
*/
void LPTIM_SelectSoftwareStart(LPTIM_TypeDef* LPTIMx)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
/* Reset the TRIGEN bits to allow a software start */
LPTIMx->CFGR &= ~(LPTIM_CFGR_TRIGEN);
}
/**
* @brief Configures the digital filter for trigger by determining the number of consecutive
* samples at the specified level to detect a correct transition.
* @param LPTIMx: where x can be 1.
* @param LPTIM_TrigSampleTime: the number of samples to detect a valid transition.
* This parameter can be:
* @arg LPTIM_TrigSampleTime_DirectTransistion : Event is detected on input transitions
* @arg LPTIM_TrigSampleTime_2Transistions : Event is detected after 2 consecutive samples at the active level
* @arg LPTIM_TrigSampleTime_4Transistions : Event is detected after 4 consecutive samples at the active level
* @arg LPTIM_TrigSampleTime_8Transistions : Event is detected after 8 consecutive samples at the active level
* @retval None
*
* @note It is mandatory to disable the peripheral to use this function.
* @note An auxiliary clock must be present to use this feature.
*/
void LPTIM_ConfigTriggerGlitchFilter(LPTIM_TypeDef* LPTIMx, uint32_t LPTIM_TrigSampleTime)
{
uint32_t tmpreg1 = 0;
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_LPTIM_TRIG_SAMPLE_TIME(LPTIM_TrigSampleTime));
/* Get the LPTIMx CFGR value */
tmpreg1 = LPTIMx->CFGR;
/* Clear the TRGFLT bits */
tmpreg1 &= ~(LPTIM_CFGR_TRGFLT);
/* Set or Reset the TRGFLT bits according to LPTIM_TrigSampleTime */
tmpreg1 |= (LPTIM_TrigSampleTime);
/* Write to LPTIMx CFGR */
LPTIMx->CFGR = tmpreg1;
}
/**
* @brief Configures the digital filter for the external clock by determining the number
of consecutive samples at the specified level to detect a correct transition.
* @param LPTIMx: where x can be 1.
* @param LPTIM_ClockSampleTime: the number of samples to detect a valid transition.
* This parameter can be:
* @arg LPTIM_ClockSampleTime_DirectTransistion : Event is detected on input transitions
* @arg LPTIM_ClockSampleTime_2Transistions : Event is detected after 2 consecutive samples at the active level
* @arg LPTIM_ClockSampleTime_4Transistions : Event is detected after 4 consecutive samples at the active level
* @arg LPTIM_ClockSampleTime_8Transistions : Event is detected after 8 consecutive samples at the active level
* @retval None
*
* @note It is mandatory to disable the peripheral to use this function.
* @note An auxiliary clock must be present to use this feature.
*/
void LPTIM_ConfigClockGlitchFilter(LPTIM_TypeDef* LPTIMx, uint32_t LPTIM_ClockSampleTime)
{
uint32_t tmpreg1 = 0;
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_LPTIM_CLOCK_SAMPLE_TIME(LPTIM_ClockSampleTime));
/* Get the LPTIMx CFGR value */
tmpreg1 = LPTIMx->CFGR;
/* Clear the CKFLT bits */
tmpreg1 &= ~(LPTIM_CFGR_CKFLT);
/* Set or Reset the CKFLT bits according to LPTIM_ClockSampleTime */
tmpreg1 |= LPTIM_ClockSampleTime;
/* Write to LPTIMx CFGR */
LPTIMx->CFGR = tmpreg1;
}
/**
* @brief Selects an operating mode.
* @param LPTIMx: where x can be 1.
* @param LPTIM_Mode: the selected mode.
* This parameter can be:
* @arg LPTIM_Mode_Continuous : Timer starts in Continuous mode
* @arg LPTIM_Mode_Single : Timer will starts in Single mode
* @retval None
*/
void LPTIM_SelectOperatingMode(LPTIM_TypeDef* LPTIMx, uint32_t LPTIM_Mode)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_LPTIM_MODE(LPTIM_Mode));
if(LPTIM_Mode == LPTIM_Mode_Continuous)
{
/* Set the CNTSTRT to select the continuous start*/
LPTIMx->CR |= LPTIM_Mode_Continuous;
}
else /*LPTIM_Mode_Single */
{
/* Set the SNGSTRT to select the continuous start*/
LPTIMx->CR |= LPTIM_Mode_Single;
}
}
/**
* @brief Enables or disables the Timeout function.
* @param LPTIMx: where x can be 1.
* @param NewState: new state of the Timeout function.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*
* @note It is mandatory to disable the peripheral to use this function.
*/
void LPTIM_TimoutCmd(LPTIM_TypeDef* LPTIMx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if(NewState != DISABLE)
{
/* Set the TIMOUT bit */
LPTIMx->CFGR |= LPTIM_CFGR_TIMOUT;
}
else
{
/* Reset the TIMOUT bit */
LPTIMx->CFGR &= ~(LPTIM_CFGR_TIMOUT);
}
}
/**
* @brief Configures the Waveform shape.
* @param LPTIMx: where x can be 1.
* @param LPTIM_Waveform: the selected waveform shape.
* This parameter can be:
* @arg LPTIM_Waveform_PWM_OnePulse : PWM/One Pulse is selected
* @arg LPTIM_Waveform_SetOnce : Set once is selected
* @retval None
*
* @note It is mandatory to disable the peripheral to use this function.
*/
void LPTIM_ConfigWaveform(LPTIM_TypeDef* LPTIMx, uint32_t LPTIM_Waveform)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_LPTIM_WAVEFORM(LPTIM_Waveform));
/* Clear the WAVE bit */
LPTIMx->CFGR &= ~(LPTIM_CFGR_CKFLT);
/* Set or Reset the WAVE bit according to LPTIM_Waveform */
LPTIMx->CFGR |= (LPTIM_Waveform);
}
/**
* @brief Configures the Autoreload and Compare registers update mode.
* @param LPTIMx: where x can be 1.
* @param LPTIM_Update: The selected update mode.
* This parameter can be:
* @arg LPTIM_Update_Immediate : Registers updated after APB write
* @arg LPTIM_Update_EndOfPeriod : Registers updated at the end of current timer preload
* @retval None
*
* @note It is mandatory to disable the peripheral to use this function.
*/
void LPTIM_ConfigUpdate(LPTIM_TypeDef* LPTIMx, uint32_t LPTIM_Update)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_LPTIM_UPDATE(LPTIM_Update));
/* Clear the PRELOAD bit */
LPTIMx->CFGR &= ~(LPTIM_CFGR_PRELOAD);
/* Set or Reset the PRELOAD bit according to LPTIM_Update */
LPTIMx->CFGR |= (LPTIM_Update);
}
/**
* @brief Writes the passed parameter in the Autoreload register.
* @param LPTIMx: where x can be 1.
* @param LPTIM_Autoreload: The Autoreload value.
* This parameter must be a value between 0x0000 and 0xFFFF
* @retval None
*/
void LPTIM_SetAutoreloadValue(LPTIM_TypeDef* LPTIMx, uint32_t LPTIM_Autoreload)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_LPTIM_AUTORELOAD(LPTIM_Autoreload));
/* Write LPTIM_Autoreload in Autoreload register */
LPTIMx->ARR = LPTIM_Autoreload;
}
/**
* @brief Writes the passed parameter in the Compare register.
* @param LPTIMx: where x can be 1.
* @param LPTIM_Compare: The Compare value.
* This parameter must be a value between 0x0000 and 0xFFFF
* @retval None
*/
void LPTIM_SetCompareValue(LPTIM_TypeDef* LPTIMx, uint32_t LPTIM_Compare)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_LPTIM_COMPARE(LPTIM_Compare));
/* Write LPTIM_Compare in Compare register */
LPTIMx->CMP = LPTIM_Compare;
}
/**
* @brief Enables or disables the Counter mode. When the Counter mode is enabled,
* the counter is incremented each valid event on ULPTIM
* @param LPTIMx: where x can be 1.
* @param NewState: new state of the Counter mode.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*
* @note It is mandatory to disable the peripheral to use this function.
*/
void LPTIM_SelectCounterMode(LPTIM_TypeDef* LPTIMx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if(NewState != DISABLE)
{
/* Set the COUNTMODE bit */
LPTIMx->CFGR |= LPTIM_CFGR_COUNTMODE;
}
else
{
/* Reset the COUNTMODE bit */
LPTIMx->CFGR &= ~(LPTIM_CFGR_COUNTMODE);
}
}
/**
* @brief Enables or disables the Encoder mode.
* @param LPTIMx: where x can be 1.
* @param NewState: New state of the encoder mode.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*
* @note It is mandatory to disable the peripheral to use this function.
*/
void LPTIM_SelectEncoderMode(LPTIM_TypeDef* LPTIMx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if(NewState != DISABLE)
{
/* Set the ENC bit */
LPTIMx->CFGR |= LPTIM_CFGR_ENC;
}
else
{
/* Reset the ENC bit */
LPTIMx->CFGR &= ~(LPTIM_CFGR_ENC);
}
}
/**
* @brief Gets the LPTIMx counter value.
* @param LPTIMx: where x can be 1.
* @retval Counter Register value
*/
uint32_t LPTIM_GetCounterValue(LPTIM_TypeDef* LPTIMx)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
/* Get the Counter Register value */
return LPTIMx->CNT;
}
/**
* @brief Gets the LPTIMx Autoreload value.
* @param LPTIMx: where x can be 1.
* @retval Counter Register value
*/
uint32_t LPTIM_GetAutoreloadValue(LPTIM_TypeDef* LPTIMx)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
/* Get the Counter Register value */
return LPTIMx->ARR;
}
/**
* @brief Gets the LPTIMx Compare value.
* @param LPTIMx: where x can be 1.
* @retval Counter Register value
*/
uint32_t LPTIM_GetCompareValue(LPTIM_TypeDef* LPTIMx)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
/* Get the Counter Register value */
return LPTIMx->CMP;
}
/**
* @brief LPTIM Input 1 Remap.
* @param LPTIMx: where x can be 1.
* @param LPTIM_OPTR :
* This Parameter can be :
* @arg LPTIM_OP_PAD_AF : Port B5 on AF1 or Port C0 on AF1 for input timer
* @arg LPTIM_OP_PAD_PA4 : Input remapped to Port A4
* @arg RCC_LPTIM1CLKSOURCE_LSI : Input remapped to Port B9
* @arg LPTIM_OP_TIM_DAC : Input coming from timer 6 output (for encoder mode)
* @retval Counter Register value
*/
void LPTIM_RemapConfig(LPTIM_TypeDef* LPTIMx, uint32_t LPTIM_OPTR)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
/* Get the Counter Register value */
LPTIMx->OR = LPTIM_OPTR;
}
/**
* @}
*/
/** @defgroup LPTIM_Group3 Interrupts and flags management functions
* @brief Interrupts and flags management functions
*
@verbatim
===============================================================================
Interrupts and flags management functions
===============================================================================
This section provides functions allowing to configure the LPTIM Interrupts, get
the status and clear flags bits.
The LPTIM provides 7 Flags and Interrupts sources (2 flags and Interrupt sources
are available only on LPTIM peripherals equipped with encoder mode interface)
Flags and Interrupts sources:
=============================
1. Compare match.
2. Auto-reload match.
3. External trigger event.
4. Autoreloaded register write completed.
5. Compare register write completed.
6. Direction change: from up to down [Available only for LPTIM peripheral with
encoder mode module]
7. Direction change: from down to up [Available only for LPTIM peripheral with
encoder mode module]
- To enable a specific interrupt source, use "LPTIM_ITConfig" function.
- To check if an interrupt was occurred, call "LPTIM_GetITStatus" function and read
the returned value.
- To get a flag status, call the "LPTIM_GetFlagStatus" function and read the returned
value.
- To clear a flag or an interrupt, use LPTIM_ClearFlag function with the
corresponding flag (interrupt).
@endverbatim
* @{
*/
/**
* @brief Enables or disables the specified LPTIM interrupts.
* @param LPTIMx: where x can be 1.
* @param LPTIM_IT: specifies the TIM interrupts sources to be enabled or disabled.
* This parameter can be any combination of the following values:
* @arg LPTIM_IT_DOWN: Counter direction change up to down Interrupt source
* @arg LPTIM_IT_UP: Counter direction change down to up Interrupt source
* @arg LPTIM_IT_ARROK: Autoreload register update OK Interrupt source
* @arg LPTIM_IT_CMPOK: Compare register update OK Interrupt source
* @arg LPTIM_IT_EXTTRIG: External trigger edge event Interrupt source
* @arg LPTIM_IT_ARRM: Autoreload match Interrupt source
* @arg LPTIM_IT_CMPM: Compare match Interrupt source
* @note LPTIM_IT_DOWN is available only for LPTIM1.
* @note LPTIM_IT_UP is available only for LPTIM1.
* @param NewState: new state of the TIM interrupts.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*
* @note It is mandatory to disable the peripheral to use this function.
*/
void LPTIM_ITConfig(LPTIM_TypeDef* LPTIMx, uint32_t LPTIM_IT, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_LPTIM_IT(LPTIM_IT));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if(NewState != DISABLE)
{
/* Enable the Interrupt sources */
LPTIMx->IER |= LPTIM_IT;
}
else
{
/* Disable the Interrupt sources */
LPTIMx->IER &= ~(LPTIM_IT);
}
}
/**
* @brief Checks whether the specified LPTIM flag is set or not.
* @param LPTIMx: where x can be 1.
* @param LPTIM_FLAG: specifies the flag to check.
* This parameter can be any combination of the following values:
* @arg LPTIM_FLAG_DOWN: Counter direction change up Flag
* @arg LPTIM_FLAG_UP: Counter direction change down to up Flag
* @arg LPTIM_FLAG_ARROK: Autoreload register update OK Flag
* @arg LPTIM_FLAG_CMPOK: Compare register update OK Flag
* @arg LPTIM_FLAG_EXTTRIG: External trigger edge event Flag
* @arg LPTIM_FLAG_ARRM: Autoreload match Flag
* @arg LPTIM_FLAG_CMPM: Compare match Flag
* @note LPTIM_Flag_DOWN is generated only for LPTIM1.
* @note LPTIM_Flag_UP is generated only for LPTIM1.
* @param NewState: new state of the TIM interrupts.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
FlagStatus LPTIM_GetFlagStatus(LPTIM_TypeDef* LPTIMx, uint32_t LPTIM_FLAG)
{
ITStatus bitstatus = RESET;
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_LPTIM_GET_FLAG(LPTIM_FLAG));
if((LPTIMx->ISR & LPTIM_FLAG) != (RESET))
{
bitstatus = SET;
}
else
{
bitstatus = RESET;
}
return bitstatus;
}
/**
* @brief Clears the LPTIMx's pending flag.
* @param LPTIMx: where x can be 1.
* @param LPTIM_CLEARF: specifies the pending bit to clear.
* This parameter can be any combination of the following values:
* @arg LPTIM_CLEARF_DOWN: Counter direction change up Clear Flag
* @arg LPTIM_CLEARF_UP: Counter direction change down to up Clear Flag
* @arg LPTIM_CLEARF_ARROK: Autoreload register update OK Clear Flag
* @arg LPTIM_CLEARF_CMPOK: Compare register update OK Clear Flag
* @arg LPTIM_CLEARF_EXTTRIG: External trigger edge event Clear Flag
* @arg LPTIM_CLEARF_ARRM: Autoreload match Clear Flag
* @arg LPTIM_CLEARF_CMPM: Compare match Clear Flag
* @note LPTIM_Flag_DOWN is generated only for LPTIM1.
* @note LPTIM_Flag_UP is generated only for LPTIM1.
* @retval None
*/
void LPTIM_ClearFlag(LPTIM_TypeDef* LPTIMx, uint32_t LPTIM_CLEARF)
{
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_LPTIM_CLEAR_FLAG(LPTIM_CLEARF));
/* Clear the IT pending Bit */
LPTIMx->ICR |= LPTIM_CLEARF;
}
/**
* @brief Check whether the specified LPTIM interrupt has occurred or not.
* @param LPTIMx: where x can be 1.
* @param LPTIM_IT: specifies the LPTIM interrupt source to check.
* @arg LPTIM_IT_DOWN: Counter direction change up to down Interrupt source
* @arg LPTIM_IT_UP: Counter direction change down to up Interrupt source
* @arg LPTIM_IT_ARROK: Autoreload register update OK Interrupt source
* @arg LPTIM_IT_CMPOK: Compare register update OK Interrupt source
* @arg LPTIM_IT_EXTTRIG: External trigger edge event Interrupt source
* @arg LPTIM_IT_ARRM: Autoreload match Interrupt source
* @arg LPTIM_IT_CMPM: Compare match Interrupt source
* @retval The new state of LPTIM_IT (SET or RESET).
*/
ITStatus LPTIM_GetITStatus(LPTIM_TypeDef* LPTIMx, uint32_t LPTIM_IT)
{
ITStatus bitstatus = RESET;
uint32_t itstatus = 0x0, itenable = 0x0;
/* Check the parameters */
assert_param(IS_LPTIM_ALL_PERIPH(LPTIMx));
assert_param(IS_LPTIM_IT(LPTIM_IT));
/* Get the Interrupt Status bit value */
itstatus = LPTIMx->ISR & LPTIM_IT;
/* Check if the Interrupt is enabled */
itenable = LPTIMx->IER & LPTIM_IT;
if((itstatus != RESET) && (itenable != RESET))
{
bitstatus = SET;
}
else
{
bitstatus = RESET;
}
return bitstatus;
}
/**
* @}
*/
/**
* @}
*/
#endif /* STM32F410xx || STM32F413_423xx */
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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