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211 lines
7.5 KiB
211 lines
7.5 KiB
7 years ago
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/**
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******************************************************************************
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* @file stm32l0xx_ll_lptim.c
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* @author MCD Application Team
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* @brief LPTIM LL module driver.
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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#if defined(USE_FULL_LL_DRIVER)
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/* Includes ------------------------------------------------------------------*/
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#include "stm32l0xx_ll_lptim.h"
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#include "stm32l0xx_ll_bus.h"
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#ifdef USE_FULL_ASSERT
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#include "stm32_assert.h"
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#else
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#define assert_param(expr) ((void)0U)
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#endif
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/** @addtogroup STM32L0xx_LL_Driver
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* @{
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*/
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#if defined (LPTIM1) || defined (LPTIM2)
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/** @addtogroup LPTIM_LL
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* @{
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*/
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/* Private types -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private constants ---------------------------------------------------------*/
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/* Private macros ------------------------------------------------------------*/
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/** @addtogroup LPTIM_LL_Private_Macros
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* @{
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*/
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#define IS_LPTIM_CLOCK_SOURCE(__VALUE__) (((__VALUE__) == LL_LPTIM_CLK_SOURCE_INTERNAL) \
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|| ((__VALUE__) == LL_LPTIM_CLK_SOURCE_EXTERNAL))
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#define IS_LPTIM_CLOCK_PRESCALER(__VALUE__) (((__VALUE__) == LL_LPTIM_PRESCALER_DIV1) \
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|| ((__VALUE__) == LL_LPTIM_PRESCALER_DIV2) \
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|| ((__VALUE__) == LL_LPTIM_PRESCALER_DIV4) \
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|| ((__VALUE__) == LL_LPTIM_PRESCALER_DIV8) \
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|| ((__VALUE__) == LL_LPTIM_PRESCALER_DIV16) \
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|| ((__VALUE__) == LL_LPTIM_PRESCALER_DIV32) \
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|| ((__VALUE__) == LL_LPTIM_PRESCALER_DIV64) \
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|| ((__VALUE__) == LL_LPTIM_PRESCALER_DIV128))
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#define IS_LPTIM_WAVEFORM(__VALUE__) (((__VALUE__) == LL_LPTIM_OUTPUT_WAVEFORM_PWM) \
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|| ((__VALUE__) == LL_LPTIM_OUTPUT_WAVEFORM_SETONCE))
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#define IS_LPTIM_OUTPUT_POLARITY(__VALUE__) (((__VALUE__) == LL_LPTIM_OUTPUT_POLARITY_REGULAR) \
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|| ((__VALUE__) == LL_LPTIM_OUTPUT_POLARITY_INVERSE))
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/**
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* @}
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*/
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/* Private function prototypes -----------------------------------------------*/
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/* Exported functions --------------------------------------------------------*/
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/** @addtogroup LPTIM_LL_Exported_Functions
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* @{
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*/
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/** @addtogroup LPTIM_LL_EF_Init
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* @{
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*/
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/**
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* @brief Set LPTIMx registers to their reset values.
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* @param LPTIMx LP Timer instance
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* @retval An ErrorStatus enumeration value:
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* - SUCCESS: LPTIMx registers are de-initialized
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* - ERROR: invalid LPTIMx instance
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*/
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ErrorStatus LL_LPTIM_DeInit(LPTIM_TypeDef* LPTIMx)
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{
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ErrorStatus result = SUCCESS;
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/* Check the parameters */
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assert_param(IS_LPTIM_INSTANCE(LPTIMx));
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if (LPTIMx == LPTIM1)
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{
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LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_LPTIM1);
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LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_LPTIM1);
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}
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#if defined(LPTIM2)
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else if (LPTIMx == LPTIM2)
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{
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LL_APB1_GRP2_ForceReset(LL_APB1_GRP2_PERIPH_LPTIM2);
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LL_APB1_GRP2_ReleaseReset(LL_APB1_GRP2_PERIPH_LPTIM2);
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}
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#endif
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else
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{
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result = ERROR;
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}
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return result;
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}
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/**
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* @brief Set each fields of the LPTIM_InitStruct structure to its default
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* value.
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* @param LPTIM_InitStruct pointer to a @ref LL_LPTIM_InitTypeDef structure
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* @retval None
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*/
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void LL_LPTIM_StructInit(LL_LPTIM_InitTypeDef* LPTIM_InitStruct)
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{
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/* Set the default configuration */
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LPTIM_InitStruct->ClockSource = LL_LPTIM_CLK_SOURCE_INTERNAL;
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LPTIM_InitStruct->Prescaler = LL_LPTIM_PRESCALER_DIV1;
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LPTIM_InitStruct->Waveform = LL_LPTIM_OUTPUT_WAVEFORM_PWM;
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LPTIM_InitStruct->Polarity = LL_LPTIM_OUTPUT_POLARITY_REGULAR;
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}
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/**
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* @brief Configure the LPTIMx peripheral according to the specified parameters.
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* @note LL_LPTIM_Init can only be called when the LPTIM instance is disabled.
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* @note LPTIMx can be disabled using unitary function @ref LL_LPTIM_Disable().
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* @param LPTIMx LP Timer Instance
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* @param LPTIM_InitStruct pointer to a @ref LL_LPTIM_InitTypeDef structure
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* @retval An ErrorStatus enumeration value:
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* - SUCCESS: LPTIMx instance has been initialized
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* - ERROR: LPTIMx instance hasn't been initialized
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*/
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ErrorStatus LL_LPTIM_Init(LPTIM_TypeDef * LPTIMx, LL_LPTIM_InitTypeDef* LPTIM_InitStruct)
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{
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ErrorStatus result = SUCCESS;
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/* The LPTIMx_CFGR register must only be modified when the LPTIM is disabled
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(ENABLE bit is reset to 0).
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*/
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if (LL_LPTIM_IsEnabled(LPTIMx))
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{
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result = ERROR;
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}
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else
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{
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/* Check the parameters */
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assert_param(IS_LPTIM_INSTANCE(LPTIMx));
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assert_param(IS_LPTIM_CLOCK_SOURCE(LPTIM_InitStruct->ClockSource));
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assert_param(IS_LPTIM_CLOCK_PRESCALER(LPTIM_InitStruct->Prescaler));
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assert_param(IS_LPTIM_WAVEFORM(LPTIM_InitStruct->Waveform));
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assert_param(IS_LPTIM_OUTPUT_POLARITY(LPTIM_InitStruct->Polarity));
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/* Set CKSEL bitfield according to ClockSource value */
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/* Set PRESC bitfield according to Prescaler value */
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/* Set WAVE bitfield according to Waveform value */
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/* Set WAVEPOL bitfield according to Polarity value */
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MODIFY_REG(LPTIMx->CFGR,
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(LPTIM_CFGR_CKSEL | LPTIM_CFGR_PRESC | LPTIM_CFGR_WAVE| LPTIM_CFGR_WAVPOL),
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LPTIM_InitStruct->ClockSource | \
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LPTIM_InitStruct->Prescaler | \
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LPTIM_InitStruct->Waveform | \
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LPTIM_InitStruct->Polarity);
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}
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return result;
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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#endif /* defined (LPTIM1) || defined (LPTIM2) */
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/**
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* @}
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*/
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#endif /* USE_FULL_LL_DRIVER */
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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