299 lines
9.0 KiB
C
299 lines
9.0 KiB
C
|
/**
|
||
|
|
******************************************************************************
|
||
|
|
* @file stm32f7xx_ll_lptim.c
|
||
|
|
* @author MCD Application Team
|
||
|
|
* @brief LPTIM LL module driver.
|
||
|
|
******************************************************************************
|
||
|
|
* @attention
|
||
|
|
*
|
||
|
|
* Copyright (c) 2017 STMicroelectronics.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* This software is licensed under terms that can be found in the LICENSE file
|
||
|
|
* in the root directory of this software component.
|
||
|
|
* If no LICENSE file comes with this software, it is provided AS-IS.
|
||
|
|
*
|
||
|
|
******************************************************************************
|
||
|
|
*/
|
||
|
|
#if defined(USE_FULL_LL_DRIVER)
|
||
|
|
|
||
|
|
/* Includes ------------------------------------------------------------------*/
|
||
|
|
#include "stm32f7xx_ll_lptim.h"
|
||
|
|
#include "stm32f7xx_ll_bus.h"
|
||
|
|
#include "stm32f7xx_ll_rcc.h"
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef USE_FULL_ASSERT
|
||
|
|
#include "stm32_assert.h"
|
||
|
|
#else
|
||
|
|
#define assert_param(expr) ((void)0U)
|
||
|
|
#endif /* USE_FULL_ASSERT */
|
||
|
|
|
||
|
|
/** @addtogroup STM32F7xx_LL_Driver
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
#if defined (LPTIM1)
|
||
|
|
|
||
|
|
/** @addtogroup LPTIM_LL
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Private types -------------------------------------------------------------*/
|
||
|
|
/* Private variables ---------------------------------------------------------*/
|
||
|
|
/* Private constants ---------------------------------------------------------*/
|
||
|
|
/* Private macros ------------------------------------------------------------*/
|
||
|
|
/** @addtogroup LPTIM_LL_Private_Macros
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
#define IS_LL_LPTIM_CLOCK_SOURCE(__VALUE__) (((__VALUE__) == LL_LPTIM_CLK_SOURCE_INTERNAL) \
|
||
|
|
|| ((__VALUE__) == LL_LPTIM_CLK_SOURCE_EXTERNAL))
|
||
|
|
|
||
|
|
#define IS_LL_LPTIM_CLOCK_PRESCALER(__VALUE__) (((__VALUE__) == LL_LPTIM_PRESCALER_DIV1) \
|
||
|
|
|| ((__VALUE__) == LL_LPTIM_PRESCALER_DIV2) \
|
||
|
|
|| ((__VALUE__) == LL_LPTIM_PRESCALER_DIV4) \
|
||
|
|
|| ((__VALUE__) == LL_LPTIM_PRESCALER_DIV8) \
|
||
|
|
|| ((__VALUE__) == LL_LPTIM_PRESCALER_DIV16) \
|
||
|
|
|| ((__VALUE__) == LL_LPTIM_PRESCALER_DIV32) \
|
||
|
|
|| ((__VALUE__) == LL_LPTIM_PRESCALER_DIV64) \
|
||
|
|
|| ((__VALUE__) == LL_LPTIM_PRESCALER_DIV128))
|
||
|
|
|
||
|
|
#define IS_LL_LPTIM_WAVEFORM(__VALUE__) (((__VALUE__) == LL_LPTIM_OUTPUT_WAVEFORM_PWM) \
|
||
|
|
|| ((__VALUE__) == LL_LPTIM_OUTPUT_WAVEFORM_SETONCE))
|
||
|
|
|
||
|
|
#define IS_LL_LPTIM_OUTPUT_POLARITY(__VALUE__) (((__VALUE__) == LL_LPTIM_OUTPUT_POLARITY_REGULAR) \
|
||
|
|
|| ((__VALUE__) == LL_LPTIM_OUTPUT_POLARITY_INVERSE))
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
/* Private function prototypes -----------------------------------------------*/
|
||
|
|
/* Private functions ---------------------------------------------------------*/
|
||
|
|
/** @defgroup LPTIM_Private_Functions LPTIM Private Functions
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
/* Exported functions --------------------------------------------------------*/
|
||
|
|
/** @addtogroup LPTIM_LL_Exported_Functions
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
/** @addtogroup LPTIM_LL_EF_Init
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Set LPTIMx registers to their reset values.
|
||
|
|
* @param LPTIMx LP Timer instance
|
||
|
|
* @retval An ErrorStatus enumeration value:
|
||
|
|
* - SUCCESS: LPTIMx registers are de-initialized
|
||
|
|
* - ERROR: invalid LPTIMx instance
|
||
|
|
*/
|
||
|
|
ErrorStatus LL_LPTIM_DeInit(LPTIM_TypeDef *LPTIMx)
|
||
|
|
{
|
||
|
|
ErrorStatus result = SUCCESS;
|
||
|
|
|
||
|
|
/* Check the parameters */
|
||
|
|
assert_param(IS_LPTIM_INSTANCE(LPTIMx));
|
||
|
|
|
||
|
|
if (LPTIMx == LPTIM1)
|
||
|
|
{
|
||
|
|
LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_LPTIM1);
|
||
|
|
LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_LPTIM1);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
result = ERROR;
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Set each fields of the LPTIM_InitStruct structure to its default
|
||
|
|
* value.
|
||
|
|
* @param LPTIM_InitStruct pointer to a @ref LL_LPTIM_InitTypeDef structure
|
||
|
|
* @retval None
|
||
|
|
*/
|
||
|
|
void LL_LPTIM_StructInit(LL_LPTIM_InitTypeDef *LPTIM_InitStruct)
|
||
|
|
{
|
||
|
|
/* Set the default configuration */
|
||
|
|
LPTIM_InitStruct->ClockSource = LL_LPTIM_CLK_SOURCE_INTERNAL;
|
||
|
|
LPTIM_InitStruct->Prescaler = LL_LPTIM_PRESCALER_DIV1;
|
||
|
|
LPTIM_InitStruct->Waveform = LL_LPTIM_OUTPUT_WAVEFORM_PWM;
|
||
|
|
LPTIM_InitStruct->Polarity = LL_LPTIM_OUTPUT_POLARITY_REGULAR;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Configure the LPTIMx peripheral according to the specified parameters.
|
||
|
|
* @note LL_LPTIM_Init can only be called when the LPTIM instance is disabled.
|
||
|
|
* @note LPTIMx can be disabled using unitary function @ref LL_LPTIM_Disable().
|
||
|
|
* @param LPTIMx LP Timer Instance
|
||
|
|
* @param LPTIM_InitStruct pointer to a @ref LL_LPTIM_InitTypeDef structure
|
||
|
|
* @retval An ErrorStatus enumeration value:
|
||
|
|
* - SUCCESS: LPTIMx instance has been initialized
|
||
|
|
* - ERROR: LPTIMx instance hasn't been initialized
|
||
|
|
*/
|
||
|
|
ErrorStatus LL_LPTIM_Init(LPTIM_TypeDef *LPTIMx, LL_LPTIM_InitTypeDef *LPTIM_InitStruct)
|
||
|
|
{
|
||
|
|
ErrorStatus result = SUCCESS;
|
||
|
|
/* Check the parameters */
|
||
|
|
assert_param(IS_LPTIM_INSTANCE(LPTIMx));
|
||
|
|
assert_param(IS_LL_LPTIM_CLOCK_SOURCE(LPTIM_InitStruct->ClockSource));
|
||
|
|
assert_param(IS_LL_LPTIM_CLOCK_PRESCALER(LPTIM_InitStruct->Prescaler));
|
||
|
|
assert_param(IS_LL_LPTIM_WAVEFORM(LPTIM_InitStruct->Waveform));
|
||
|
|
assert_param(IS_LL_LPTIM_OUTPUT_POLARITY(LPTIM_InitStruct->Polarity));
|
||
|
|
|
||
|
|
/* The LPTIMx_CFGR register must only be modified when the LPTIM is disabled
|
||
|
|
(ENABLE bit is reset to 0).
|
||
|
|
*/
|
||
|
|
if (LL_LPTIM_IsEnabled(LPTIMx) == 1UL)
|
||
|
|
{
|
||
|
|
result = ERROR;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
/* Set CKSEL bitfield according to ClockSource value */
|
||
|
|
/* Set PRESC bitfield according to Prescaler value */
|
||
|
|
/* Set WAVE bitfield according to Waveform value */
|
||
|
|
/* Set WAVEPOL bitfield according to Polarity value */
|
||
|
|
MODIFY_REG(LPTIMx->CFGR,
|
||
|
|
(LPTIM_CFGR_CKSEL | LPTIM_CFGR_PRESC | LPTIM_CFGR_WAVE | LPTIM_CFGR_WAVPOL),
|
||
|
|
LPTIM_InitStruct->ClockSource | \
|
||
|
|
LPTIM_InitStruct->Prescaler | \
|
||
|
|
LPTIM_InitStruct->Waveform | \
|
||
|
|
LPTIM_InitStruct->Polarity);
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Disable the LPTIM instance
|
||
|
|
* @rmtoll CR ENABLE LL_LPTIM_Disable
|
||
|
|
* @param LPTIMx Low-Power Timer instance
|
||
|
|
* @note The following sequence is required to solve LPTIM disable HW limitation.
|
||
|
|
* Please check Errata Sheet ES0335 for more details under "MCU may remain
|
||
|
|
* stuck in LPTIM interrupt when entering Stop mode" section.
|
||
|
|
* @retval None
|
||
|
|
*/
|
||
|
|
void LL_LPTIM_Disable(LPTIM_TypeDef *LPTIMx)
|
||
|
|
{
|
||
|
|
LL_RCC_ClocksTypeDef rcc_clock;
|
||
|
|
uint32_t tmpclksource = 0;
|
||
|
|
uint32_t tmpIER;
|
||
|
|
uint32_t tmpCFGR;
|
||
|
|
uint32_t tmpCMP;
|
||
|
|
uint32_t tmpARR;
|
||
|
|
uint32_t primask_bit;
|
||
|
|
|
||
|
|
/* Check the parameters */
|
||
|
|
assert_param(IS_LPTIM_INSTANCE(LPTIMx));
|
||
|
|
|
||
|
|
/* Enter critical section */
|
||
|
|
primask_bit = __get_PRIMASK();
|
||
|
|
__set_PRIMASK(1) ;
|
||
|
|
|
||
|
|
/********** Save LPTIM Config *********/
|
||
|
|
/* Save LPTIM source clock */
|
||
|
|
switch ((uint32_t)LPTIMx)
|
||
|
|
{
|
||
|
|
case LPTIM1_BASE:
|
||
|
|
tmpclksource = LL_RCC_GetLPTIMClockSource(LL_RCC_LPTIM1_CLKSOURCE);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Save LPTIM configuration registers */
|
||
|
|
tmpIER = LPTIMx->IER;
|
||
|
|
tmpCFGR = LPTIMx->CFGR;
|
||
|
|
tmpCMP = LPTIMx->CMP;
|
||
|
|
tmpARR = LPTIMx->ARR;
|
||
|
|
|
||
|
|
/************* Reset LPTIM ************/
|
||
|
|
(void)LL_LPTIM_DeInit(LPTIMx);
|
||
|
|
|
||
|
|
/********* Restore LPTIM Config *******/
|
||
|
|
LL_RCC_GetSystemClocksFreq(&rcc_clock);
|
||
|
|
|
||
|
|
if ((tmpCMP != 0UL) || (tmpARR != 0UL))
|
||
|
|
{
|
||
|
|
/* Force LPTIM source kernel clock from APB */
|
||
|
|
switch ((uint32_t)LPTIMx)
|
||
|
|
{
|
||
|
|
case LPTIM1_BASE:
|
||
|
|
LL_RCC_SetLPTIMClockSource(LL_RCC_LPTIM1_CLKSOURCE_PCLK1);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (tmpCMP != 0UL)
|
||
|
|
{
|
||
|
|
/* Restore CMP and ARR registers (LPTIM should be enabled first) */
|
||
|
|
LPTIMx->CR |= LPTIM_CR_ENABLE;
|
||
|
|
LPTIMx->CMP = tmpCMP;
|
||
|
|
|
||
|
|
/* Polling on CMP write ok status after above restore operation */
|
||
|
|
do
|
||
|
|
{
|
||
|
|
rcc_clock.SYSCLK_Frequency--; /* Used for timeout */
|
||
|
|
} while (((LL_LPTIM_IsActiveFlag_CMPOK(LPTIMx) != 1UL)) && ((rcc_clock.SYSCLK_Frequency) > 0UL));
|
||
|
|
|
||
|
|
LL_LPTIM_ClearFlag_CMPOK(LPTIMx);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (tmpARR != 0UL)
|
||
|
|
{
|
||
|
|
LPTIMx->CR |= LPTIM_CR_ENABLE;
|
||
|
|
LPTIMx->ARR = tmpARR;
|
||
|
|
|
||
|
|
LL_RCC_GetSystemClocksFreq(&rcc_clock);
|
||
|
|
/* Polling on ARR write ok status after above restore operation */
|
||
|
|
do
|
||
|
|
{
|
||
|
|
rcc_clock.SYSCLK_Frequency--; /* Used for timeout */
|
||
|
|
}
|
||
|
|
while (((LL_LPTIM_IsActiveFlag_ARROK(LPTIMx) != 1UL)) && ((rcc_clock.SYSCLK_Frequency) > 0UL));
|
||
|
|
|
||
|
|
LL_LPTIM_ClearFlag_ARROK(LPTIMx);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* Restore LPTIM source kernel clock */
|
||
|
|
LL_RCC_SetLPTIMClockSource(tmpclksource);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Restore configuration registers (LPTIM should be disabled first) */
|
||
|
|
LPTIMx->CR &= ~(LPTIM_CR_ENABLE);
|
||
|
|
LPTIMx->IER = tmpIER;
|
||
|
|
LPTIMx->CFGR = tmpCFGR;
|
||
|
|
|
||
|
|
/* Exit critical section: restore previous priority mask */
|
||
|
|
__set_PRIMASK(primask_bit);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
#endif /* LPTIM1 */
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
#endif /* USE_FULL_LL_DRIVER */
|