/** | |
****************************************************************************** | |
* @file stm32f0xx_hal_comp.c | |
* @author MCD Application Team | |
* @brief COMP HAL module driver. | |
* This file provides firmware functions to manage the following | |
* functionalities of the COMP peripheral: | |
* + Initialization/de-initialization functions | |
* + I/O operation functions | |
* + Peripheral Control functions | |
* + Peripheral State functions | |
* | |
@verbatim | |
================================================================================ | |
##### COMP Peripheral features ##### | |
================================================================================ | |
[..] | |
The STM32F0xx device family integrates up to 2 analog comparators COMP1 and COMP2: | |
(+) The non inverting input and inverting input can be set to GPIO pins. | |
(+) The COMP output is available using HAL_COMP_GetOutputLevel() | |
and can be set on GPIO pins. | |
(+) The COMP output can be redirected to embedded timers (TIM1, TIM2 and TIM3). | |
(+) The comparators COMP1 and COMP2 can be combined in window mode. | |
(+) The comparators have interrupt capability with wake-up | |
from Sleep and Stop modes (through the EXTI controller): | |
(++) COMP1 is internally connected to EXTI Line 21 | |
(++) COMP2 is internally connected to EXTI Line 22 | |
(+) From the corresponding IRQ handler, the right interrupt source can be retrieved with the | |
macros __HAL_COMP_COMP1_EXTI_GET_FLAG() and __HAL_COMP_COMP2_EXTI_GET_FLAG(). | |
##### How to use this driver ##### | |
================================================================================ | |
[..] | |
This driver provides functions to configure and program the Comparators of STM32F05x, STM32F07x and STM32F09x devices. | |
To use the comparator, perform the following steps: | |
(#) Fill in the HAL_COMP_MspInit() to | |
(++) Configure the comparator input in analog mode using HAL_GPIO_Init() | |
(++) Configure the comparator output in alternate function mode using HAL_GPIO_Init() to map the comparator | |
output to the GPIO pin | |
(++) If required enable the COMP interrupt by configuring and enabling EXTI line in Interrupt mode and | |
selecting the desired sensitivity level using HAL_GPIO_Init() function. After that enable the comparator | |
interrupt vector using HAL_NVIC_EnableIRQ() function. | |
(#) Configure the comparator using HAL_COMP_Init() function: | |
(++) Select the inverting input (input minus) | |
(++) Select the non inverting input (input plus) | |
(++) Select the output polarity | |
(++) Select the output redirection | |
(++) Select the hysteresis level | |
(++) Select the power mode | |
(++) Select the event/interrupt mode | |
(++) Select the window mode | |
-@@- HAL_COMP_Init() calls internally __HAL_RCC_SYSCFG_CLK_ENABLE() in order | |
to access the comparator(s) registers. | |
(#) Enable the comparator using HAL_COMP_Start() function or HAL_COMP_Start_IT() function for interrupt mode. | |
(#) Use HAL_COMP_TriggerCallback() and/or HAL_COMP_GetOutputLevel() functions | |
to manage comparator outputs (event/interrupt triggered and output level). | |
(#) Disable the comparator using HAL_COMP_Stop() or HAL_COMP_Stop_IT() | |
function. | |
(#) De-initialize the comparator using HAL_COMP_DeInit() function. | |
(#) For safety purposes comparator(s) can be locked using HAL_COMP_Lock() function. | |
Only a MCU reset can reset that protection. | |
@endverbatim | |
****************************************************************************** | |
* @attention | |
* | |
* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> | |
* | |
* Redistribution and use in source and binary forms, with or without modification, | |
* are permitted provided that the following conditions are met: | |
* 1. Redistributions of source code must retain the above copyright notice, | |
* this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright notice, | |
* this list of conditions and the following disclaimer in the documentation | |
* and/or other materials provided with the distribution. | |
* 3. Neither the name of STMicroelectronics nor the names of its contributors | |
* may be used to endorse or promote products derived from this software | |
* without specific prior written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE | |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
* | |
****************************************************************************** | |
*/ | |
/* | |
Additional Tables: | |
Table 1. COMP Inputs for the STM32F05x, STM32F07x and STM32F09x devices | |
+--------------------------------------------------+ | |
| | | COMP1 | COMP2 | | |
|-----------------|----------------|---------------| | |
| | 1/4 VREFINT | OK | OK | | |
| | 1/2 VREFINT | OK | OK | | |
| | 3/4 VREFINT | OK | OK | | |
| Inverting Input | VREFINT | OK | OK | | |
| | DAC1 OUT (PA4) | OK | OK | | |
| | DAC2 OUT (PA5) | OK | OK | | |
| | IO1 | PA0 | PA2 | | |
|-----------------|----------------|-------|-------| | |
| Non Inverting | | PA1 | PA3 | | |
| Input | | | | | |
+--------------------------------------------------+ | |
Table 2. COMP Outputs for the STM32F05x, STM32F07x and STM32F09x devices | |
+---------------+ | |
| COMP1 | COMP2 | | |
|-------|-------| | |
| PA0 | PA2 | | |
| PA6 | PA7 | | |
| PA11 | PA12 | | |
+---------------+ | |
Table 3. COMP Outputs redirection to embedded timers for the STM32F05x, STM32F07x and STM32F09x devices | |
+---------------------------------+ | |
| COMP1 | COMP2 | | |
|----------------|----------------| | |
| TIM1 BKIN | TIM1 BKIN | | |
| | | | |
| TIM1 OCREFCLR | TIM1 OCREFCLR | | |
| | | | |
| TIM1 IC1 | TIM1 IC1 | | |
| | | | |
| TIM2 IC4 | TIM2 IC4 | | |
| | | | |
| TIM2 OCREFCLR | TIM2 OCREFCLR | | |
| | | | |
| TIM3 IC1 | TIM3 IC1 | | |
| | | | |
| TIM3 OCREFCLR | TIM3 OCREFCLR | | |
+---------------------------------+ | |
*/ | |
/* Includes ------------------------------------------------------------------*/ | |
#include "stm32f0xx_hal.h" | |
#ifdef HAL_COMP_MODULE_ENABLED | |
#if defined(STM32F051x8) || defined(STM32F058xx) || \ | |
defined(STM32F071xB) || defined(STM32F072xB) || defined(STM32F078xx) || \ | |
defined(STM32F091xC) || defined (STM32F098xx) | |
/** @addtogroup STM32F0xx_HAL_Driver | |
* @{ | |
*/ | |
/** @defgroup COMP COMP | |
* @brief COMP HAL module driver | |
* @{ | |
*/ | |
/* Private typedef -----------------------------------------------------------*/ | |
/* Private define ------------------------------------------------------------*/ | |
/** @defgroup COMP_Private_Constants COMP Private Constants | |
* @{ | |
*/ | |
/* Delay for COMP startup time. */ | |
/* Note: Delay required to reach propagation delay specification. */ | |
/* Literal set to maximum value (refer to device datasheet, */ | |
/* parameter "tSTART"). */ | |
/* Unit: us */ | |
#define COMP_DELAY_STARTUP_US (60U) /*!< Delay for COMP startup time */ | |
/* CSR register reset value */ | |
#define COMP_CSR_RESET_VALUE (0x00000000U) | |
/* CSR register masks */ | |
#define COMP_CSR_RESET_PARAMETERS_MASK (0x00003FFFU) | |
#define COMP_CSR_UPDATE_PARAMETERS_MASK (0x00003FFEU) | |
/* CSR COMPx non inverting input mask */ | |
#define COMP_CSR_COMPxNONINSEL_MASK ((uint16_t)COMP_CSR_COMP1SW1) | |
/* CSR COMP2 shift */ | |
#define COMP_CSR_COMP1_SHIFT 0U | |
#define COMP_CSR_COMP2_SHIFT 16U | |
/** | |
* @} | |
*/ | |
/* Private macro -------------------------------------------------------------*/ | |
/* Private variables ---------------------------------------------------------*/ | |
/* Private function prototypes -----------------------------------------------*/ | |
/* Private functions ---------------------------------------------------------*/ | |
/** @defgroup COMP_Exported_Functions COMP Exported Functions | |
* @{ | |
*/ | |
/** @defgroup COMP_Exported_Functions_Group1 Initialization/de-initialization functions | |
* @brief Initialization and Configuration functions | |
* | |
@verbatim | |
=============================================================================== | |
##### Initialization and Configuration functions ##### | |
=============================================================================== | |
[..] This section provides functions to initialize and de-initialize comparators | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Initializes the COMP according to the specified | |
* parameters in the COMP_InitTypeDef and create the associated handle. | |
* @note If the selected comparator is locked, initialization can't be performed. | |
* To unlock the configuration, perform a system reset. | |
* @param hcomp COMP handle | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_COMP_Init(COMP_HandleTypeDef *hcomp) | |
{ | |
HAL_StatusTypeDef status = HAL_OK; | |
uint32_t regshift = COMP_CSR_COMP1_SHIFT; | |
/* Check the COMP handle allocation and lock status */ | |
if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET)) | |
{ | |
status = HAL_ERROR; | |
} | |
else | |
{ | |
/* Check the parameter */ | |
assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); | |
assert_param(IS_COMP_INVERTINGINPUT(hcomp->Init.InvertingInput)); | |
assert_param(IS_COMP_NONINVERTINGINPUT(hcomp->Init.NonInvertingInput)); | |
assert_param(IS_COMP_OUTPUT(hcomp->Init.Output)); | |
assert_param(IS_COMP_OUTPUTPOL(hcomp->Init.OutputPol)); | |
assert_param(IS_COMP_HYSTERESIS(hcomp->Init.Hysteresis)); | |
assert_param(IS_COMP_MODE(hcomp->Init.Mode)); | |
if(hcomp->Init.NonInvertingInput == COMP_NONINVERTINGINPUT_DAC1SWITCHCLOSED) | |
{ | |
assert_param(IS_COMP_DAC1SWITCH_INSTANCE(hcomp->Instance)); | |
} | |
if(hcomp->Init.WindowMode != COMP_WINDOWMODE_DISABLE) | |
{ | |
assert_param(IS_COMP_WINDOWMODE_INSTANCE(hcomp->Instance)); | |
} | |
/* Init SYSCFG and the low level hardware to access comparators */ | |
__HAL_RCC_SYSCFG_CLK_ENABLE(); | |
/* Init the low level hardware : SYSCFG to access comparators */ | |
HAL_COMP_MspInit(hcomp); | |
if(hcomp->State == HAL_COMP_STATE_RESET) | |
{ | |
/* Allocate lock resource and initialize it */ | |
hcomp->Lock = HAL_UNLOCKED; | |
} | |
/* Change COMP peripheral state */ | |
hcomp->State = HAL_COMP_STATE_BUSY; | |
/* Set COMP parameters */ | |
/* Set COMPxINSEL bits according to hcomp->Init.InvertingInput value */ | |
/* Set COMPxOUTSEL bits according to hcomp->Init.Output value */ | |
/* Set COMPxPOL bit according to hcomp->Init.OutputPol value */ | |
/* Set COMPxHYST bits according to hcomp->Init.Hysteresis value */ | |
/* Set COMPxMODE bits according to hcomp->Init.Mode value */ | |
if(hcomp->Instance == COMP2) | |
{ | |
regshift = COMP_CSR_COMP2_SHIFT; | |
} | |
MODIFY_REG(COMP->CSR, | |
(COMP_CSR_COMPxINSEL | COMP_CSR_COMPxNONINSEL_MASK | \ | |
COMP_CSR_COMPxOUTSEL | COMP_CSR_COMPxPOL | \ | |
COMP_CSR_COMPxHYST | COMP_CSR_COMPxMODE) << regshift, | |
(hcomp->Init.InvertingInput | \ | |
hcomp->Init.NonInvertingInput | \ | |
hcomp->Init.Output | \ | |
hcomp->Init.OutputPol | \ | |
hcomp->Init.Hysteresis | \ | |
hcomp->Init.Mode) << regshift); | |
if(hcomp->Init.WindowMode != COMP_WINDOWMODE_DISABLE) | |
{ | |
COMP->CSR |= COMP_CSR_WNDWEN; | |
} | |
/* Initialize the COMP state*/ | |
hcomp->State = HAL_COMP_STATE_READY; | |
} | |
return status; | |
} | |
/** | |
* @brief DeInitializes the COMP peripheral | |
* @note Deinitialization can't be performed if the COMP configuration is locked. | |
* To unlock the configuration, perform a system reset. | |
* @param hcomp COMP handle | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_COMP_DeInit(COMP_HandleTypeDef *hcomp) | |
{ | |
HAL_StatusTypeDef status = HAL_OK; | |
uint32_t regshift = COMP_CSR_COMP1_SHIFT; | |
/* Check the COMP handle allocation and lock status */ | |
if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET)) | |
{ | |
status = HAL_ERROR; | |
} | |
else | |
{ | |
/* Check the parameter */ | |
assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); | |
/* Set COMP_CSR register to reset value for the corresponding COMP instance */ | |
if(hcomp->Instance == COMP2) | |
{ | |
regshift = COMP_CSR_COMP2_SHIFT; | |
} | |
MODIFY_REG(COMP->CSR, | |
COMP_CSR_RESET_PARAMETERS_MASK << regshift, | |
COMP_CSR_RESET_VALUE << regshift); | |
/* DeInit the low level hardware: SYSCFG, GPIO, CLOCK and NVIC */ | |
HAL_COMP_MspDeInit(hcomp); | |
hcomp->State = HAL_COMP_STATE_RESET; | |
/* Release Lock */ | |
__HAL_UNLOCK(hcomp); | |
} | |
return status; | |
} | |
/** | |
* @brief Initializes the COMP MSP. | |
* @param hcomp COMP handle | |
* @retval None | |
*/ | |
__weak void HAL_COMP_MspInit(COMP_HandleTypeDef *hcomp) | |
{ | |
/* Prevent unused argument(s) compilation warning */ | |
UNUSED(hcomp); | |
/* NOTE : This function Should not be modified, when the callback is needed, | |
the HAL_COMP_MspInit could be implenetd in the user file | |
*/ | |
} | |
/** | |
* @brief DeInitializes COMP MSP. | |
* @param hcomp COMP handle | |
* @retval None | |
*/ | |
__weak void HAL_COMP_MspDeInit(COMP_HandleTypeDef *hcomp) | |
{ | |
/* Prevent unused argument(s) compilation warning */ | |
UNUSED(hcomp); | |
/* NOTE : This function Should not be modified, when the callback is needed, | |
the HAL_COMP_MspDeInit could be implenetd in the user file | |
*/ | |
} | |
/** | |
* @} | |
*/ | |
/** @defgroup COMP_Exported_Functions_Group2 I/O operation functions | |
* @brief Data transfers functions | |
* | |
@verbatim | |
=============================================================================== | |
##### IO operation functions ##### | |
=============================================================================== | |
[..] | |
This subsection provides a set of functions allowing to manage the COMP data | |
transfers. | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Start the comparator | |
* @param hcomp COMP handle | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_COMP_Start(COMP_HandleTypeDef *hcomp) | |
{ | |
uint32_t wait_loop_index = 0U; | |
HAL_StatusTypeDef status = HAL_OK; | |
uint32_t regshift = COMP_CSR_COMP1_SHIFT; | |
/* Check the COMP handle allocation and lock status */ | |
if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET)) | |
{ | |
status = HAL_ERROR; | |
} | |
else | |
{ | |
/* Check the parameter */ | |
assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); | |
if(hcomp->State == HAL_COMP_STATE_READY) | |
{ | |
/* Enable the selected comparator */ | |
if(hcomp->Instance == COMP2) | |
{ | |
regshift = COMP_CSR_COMP2_SHIFT; | |
} | |
SET_BIT(COMP->CSR, COMP_CSR_COMPxEN << regshift); | |
/* Set HAL COMP handle state */ | |
hcomp->State = HAL_COMP_STATE_BUSY; | |
/* Delay for COMP startup time */ | |
wait_loop_index = (COMP_DELAY_STARTUP_US * (SystemCoreClock / 1000000U)); | |
while(wait_loop_index != 0U) | |
{ | |
wait_loop_index--; | |
} | |
} | |
else | |
{ | |
status = HAL_ERROR; | |
} | |
} | |
return status; | |
} | |
/** | |
* @brief Stop the comparator | |
* @param hcomp COMP handle | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_COMP_Stop(COMP_HandleTypeDef *hcomp) | |
{ | |
HAL_StatusTypeDef status = HAL_OK; | |
uint32_t regshift = COMP_CSR_COMP1_SHIFT; | |
/* Check the COMP handle allocation and lock status */ | |
if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET)) | |
{ | |
status = HAL_ERROR; | |
} | |
else | |
{ | |
/* Check the parameter */ | |
assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); | |
if(hcomp->State == HAL_COMP_STATE_BUSY) | |
{ | |
/* Disable the selected comparator */ | |
if(hcomp->Instance == COMP2) | |
{ | |
regshift = COMP_CSR_COMP2_SHIFT; | |
} | |
CLEAR_BIT(COMP->CSR, COMP_CSR_COMPxEN << regshift); | |
hcomp->State = HAL_COMP_STATE_READY; | |
} | |
else | |
{ | |
status = HAL_ERROR; | |
} | |
} | |
return status; | |
} | |
/** | |
* @brief Enables the interrupt and starts the comparator | |
* @param hcomp COMP handle | |
* @retval HAL status. | |
*/ | |
HAL_StatusTypeDef HAL_COMP_Start_IT(COMP_HandleTypeDef *hcomp) | |
{ | |
HAL_StatusTypeDef status = HAL_OK; | |
uint32_t extiline = 0U; | |
/* Check the parameter */ | |
assert_param(IS_COMP_TRIGGERMODE(hcomp->Init.TriggerMode)); | |
status = HAL_COMP_Start(hcomp); | |
if(status == HAL_OK) | |
{ | |
/* Check the Exti Line output configuration */ | |
extiline = COMP_GET_EXTI_LINE(hcomp->Instance); | |
/* Configure the rising edge */ | |
if((hcomp->Init.TriggerMode & COMP_TRIGGERMODE_IT_RISING) != RESET) | |
{ | |
SET_BIT(EXTI->RTSR, extiline); | |
} | |
else | |
{ | |
CLEAR_BIT(EXTI->RTSR, extiline); | |
} | |
/* Configure the falling edge */ | |
if((hcomp->Init.TriggerMode & COMP_TRIGGERMODE_IT_FALLING) != RESET) | |
{ | |
SET_BIT(EXTI->FTSR, extiline); | |
} | |
else | |
{ | |
CLEAR_BIT(EXTI->FTSR, extiline); | |
} | |
/* Clear COMP EXTI pending bit */ | |
WRITE_REG(EXTI->PR, extiline); | |
/* Enable Exti interrupt mode */ | |
SET_BIT(EXTI->IMR, extiline); | |
} | |
return status; | |
} | |
/** | |
* @brief Disable the interrupt and Stop the comparator | |
* @param hcomp COMP handle | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_COMP_Stop_IT(COMP_HandleTypeDef *hcomp) | |
{ | |
HAL_StatusTypeDef status = HAL_OK; | |
/* Disable the Exti Line interrupt mode */ | |
CLEAR_BIT(EXTI->IMR, COMP_GET_EXTI_LINE(hcomp->Instance)); | |
status = HAL_COMP_Stop(hcomp); | |
return status; | |
} | |
/** | |
* @brief Comparator IRQ Handler | |
* @param hcomp COMP handle | |
* @retval HAL status | |
*/ | |
void HAL_COMP_IRQHandler(COMP_HandleTypeDef *hcomp) | |
{ | |
uint32_t extiline = COMP_GET_EXTI_LINE(hcomp->Instance); | |
/* Check COMP Exti flag */ | |
if(READ_BIT(EXTI->PR, extiline) != RESET) | |
{ | |
/* Clear COMP Exti pending bit */ | |
WRITE_REG(EXTI->PR, extiline); | |
/* COMP trigger user callback */ | |
HAL_COMP_TriggerCallback(hcomp); | |
} | |
} | |
/** | |
* @} | |
*/ | |
/** @defgroup COMP_Exported_Functions_Group3 Peripheral Control functions | |
* @brief management functions | |
* | |
@verbatim | |
=============================================================================== | |
##### Peripheral Control functions ##### | |
=============================================================================== | |
[..] | |
This subsection provides a set of functions allowing to control the COMP data | |
transfers. | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Lock the selected comparator configuration. | |
* @param hcomp COMP handle | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_COMP_Lock(COMP_HandleTypeDef *hcomp) | |
{ | |
HAL_StatusTypeDef status = HAL_OK; | |
uint32_t regshift = COMP_CSR_COMP1_SHIFT; | |
/* Check the COMP handle allocation and lock status */ | |
if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET)) | |
{ | |
status = HAL_ERROR; | |
} | |
else | |
{ | |
/* Check the parameter */ | |
assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); | |
/* Set lock flag */ | |
hcomp->State |= COMP_STATE_BIT_LOCK; | |
/* Set the lock bit corresponding to selected comparator */ | |
if(hcomp->Instance == COMP2) | |
{ | |
regshift = COMP_CSR_COMP2_SHIFT; | |
} | |
SET_BIT(COMP->CSR, COMP_CSR_COMPxLOCK << regshift); | |
} | |
return status; | |
} | |
/** | |
* @brief Return the output level (high or low) of the selected comparator. | |
* The output level depends on the selected polarity. | |
* If the polarity is not inverted: | |
* - Comparator output is low when the non-inverting input is at a lower | |
* voltage than the inverting input | |
* - Comparator output is high when the non-inverting input is at a higher | |
* voltage than the inverting input | |
* If the polarity is inverted: | |
* - Comparator output is high when the non-inverting input is at a lower | |
* voltage than the inverting input | |
* - Comparator output is low when the non-inverting input is at a higher | |
* voltage than the inverting input | |
* @param hcomp COMP handle | |
* @retval Returns the selected comparator output level: COMP_OUTPUTLEVEL_LOW or COMP_OUTPUTLEVEL_HIGH. | |
* | |
*/ | |
uint32_t HAL_COMP_GetOutputLevel(COMP_HandleTypeDef *hcomp) | |
{ | |
uint32_t level=0; | |
uint32_t regshift = COMP_CSR_COMP1_SHIFT; | |
/* Check the parameter */ | |
assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); | |
if(hcomp->Instance == COMP2) | |
{ | |
regshift = COMP_CSR_COMP2_SHIFT; | |
} | |
level = READ_BIT(COMP->CSR, COMP_CSR_COMPxOUT << regshift); | |
if(level != 0U) | |
{ | |
return(COMP_OUTPUTLEVEL_HIGH); | |
} | |
return(COMP_OUTPUTLEVEL_LOW); | |
} | |
/** | |
* @brief Comparator callback. | |
* @param hcomp COMP handle | |
* @retval None | |
*/ | |
__weak void HAL_COMP_TriggerCallback(COMP_HandleTypeDef *hcomp) | |
{ | |
/* Prevent unused argument(s) compilation warning */ | |
UNUSED(hcomp); | |
/* NOTE : This function should not be modified, when the callback is needed, | |
the HAL_COMP_TriggerCallback should be implemented in the user file | |
*/ | |
} | |
/** | |
* @} | |
*/ | |
/** @defgroup COMP_Exported_Functions_Group4 Peripheral State functions | |
* @brief Peripheral State functions | |
* | |
@verbatim | |
=============================================================================== | |
##### Peripheral State functions ##### | |
=============================================================================== | |
[..] | |
This subsection permit to get in run-time the status of the peripheral | |
and the data flow. | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Return the COMP state | |
* @param hcomp COMP handle | |
* @retval HAL state | |
*/ | |
uint32_t HAL_COMP_GetState(COMP_HandleTypeDef *hcomp) | |
{ | |
/* Check the COMP handle allocation */ | |
if(hcomp == NULL) | |
{ | |
return HAL_COMP_STATE_RESET; | |
} | |
/* Check the parameter */ | |
assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); | |
return hcomp->State; | |
} | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
#endif /* STM32F051x8 || STM32F058xx || */ | |
/* STM32F071xB || STM32F072xB || STM32F078xx || */ | |
/* STM32F091xC || defined (STM32F098xx) */ | |
#endif /* HAL_COMP_MODULE_ENABLED */ | |
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |