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Location: therm/libraries/STM32F0xx_HAL_Driver/Src/stm32f0xx_hal_comp.c - annotation
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Add new CMSIS, fix makefile
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******************************************************************************
* @file stm32f0xx_hal_comp.c
* @author MCD Application Team
* @version V1.1.0
* @date 03-Oct-2014
* @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
as shown in table1. COMP Inputs below.
(#) The COMP output is available using HAL_COMP_GetOutputLevel()
and can be set on GPIO pins. Refer to table 2. COMP Outputs below.
(#) The COMP output can be redirected to embedded timers (TIM1, TIM2 and TIM3)
Refer to table 3. COMP Outputs redirection to embedded timers below.
(#) 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
macro __HAL_COMP_EXTI_GET_FLAG(). Possible values are:
(++) COMP_EXTI_LINE_COMP1_EVENT
(++) COMP_EXTI_LINE_COMP2_EVENT
[..] Table 1. COMP Inputs for the STM32F05x and STM32F07x 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 and STM32F07x devices
+---------------+
| COMP1 | COMP2 |
|-------|-------|
| PA0 | PA2 |
| PA6 | PA7 |
| PA11 | PA12 |
+---------------+
[..] Table 3. COMP Outputs redirection to embedded timers for the STM32F05x and STM32F07x 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 |
+---------------------------------+
##### How to use this driver #####
================================================================================
[..]
This driver provides functions to configure and program the Comparators of STM32F05x and STM32F07x 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
(++) Select the non inverting input
(++) Select the output polarity
(++) Select the output redirection
(++) Select the hysteresis level
(++) Select the power mode
(++) Select the event/interrupt mode
(#) Enable the comparator using HAL_COMP_Start() function or HAL_COMP_Start_IT() function for interrupt mode
(#) Read the comparator output level with HAL_COMP_GetOutputLevel()
@endverbatim
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT(c) 2014 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.
*
******************************************************************************
*/
#if defined(STM32F051x8) || defined(STM32F058xx) || \
defined(STM32F071xB) || defined(STM32F072xB) || defined(STM32F078xx) || \
defined(STM32F091xC) || defined (STM32F098xx)
/* Includes ------------------------------------------------------------------*/
#include "stm32f0xx_hal.h"
/** @addtogroup STM32F0xx_HAL_Driver
* @{
*/
/** @defgroup COMP COMP HAL Module Driver
* @brief COMP HAL module driver
* @{
*/
#ifdef HAL_COMP_MODULE_ENABLED
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/** @defgroup COMP_Private_Constants COMP Private Constants
* @{
*/
/* CSR register reset value */
#define COMP_CSR_RESET_VALUE ((uint32_t)0x00000000)
/* CSR register masks */
#define COMP_CSR_RESET_PARAMETERS_MASK ((uint32_t)0x00003FFF)
#define COMP_CSR_UPDATE_PARAMETERS_MASK ((uint32_t)0x00003FFE)
/* 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_DISABLED)
{
assert_param(IS_COMP_WINDOWMODE_INSTANCE(hcomp->Instance));
}
if(hcomp->State == HAL_COMP_STATE_RESET)
{
/* Init SYSCFG and the low level hardware to access comparators */
__SYSCFG_CLK_ENABLE();
HAL_COMP_MspInit(hcomp);
}
/* 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,
(uint32_t)(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_DISABLED)
{
COMP->CSR |= COMP_CSR_WNDWEN;
}
/* Initialize the COMP state*/
if(hcomp->State == HAL_COMP_STATE_RESET)
{
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;
}
return status;
}
/**
* @brief Initializes the COMP MSP.
* @param hcomp: COMP handle
* @retval None
*/
__weak void HAL_COMP_MspInit(COMP_HandleTypeDef *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)
{
/* 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)
{
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, (uint32_t)COMP_CSR_COMPxEN << regshift);
hcomp->State = HAL_COMP_STATE_BUSY;
}
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, (uint32_t)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 = 0;
/* 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 = __HAL_COMP_GET_EXTI_LINE(hcomp->Instance);
/* Configure the rising edge */
if((hcomp->Init.TriggerMode & COMP_TRIGGERMODE_IT_RISING) != RESET)
{
__HAL_COMP_EXTI_RISING_IT_ENABLE(extiline);
}
else
{
__HAL_COMP_EXTI_RISING_IT_DISABLE(extiline);
}
/* Configure the falling edge */
if((hcomp->Init.TriggerMode & COMP_TRIGGERMODE_IT_FALLING) != RESET)
{
__HAL_COMP_EXTI_FALLING_IT_ENABLE(extiline);
}
else
{
__HAL_COMP_EXTI_FALLING_IT_DISABLE(extiline);
}
/* Enable Exti interrupt mode */
__HAL_COMP_EXTI_ENABLE_IT(extiline);
/* Clear COMP Exti pending bit */
__HAL_COMP_EXTI_CLEAR_FLAG(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 */
__HAL_COMP_EXTI_DISABLE_IT(__HAL_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 = __HAL_COMP_GET_EXTI_LINE(hcomp->Instance);
/* Check COMP Exti flag */
if(__HAL_COMP_EXTI_GET_FLAG(extiline) != RESET)
{
/* Clear COMP Exti pending bit */
__HAL_COMP_EXTI_CLEAR_FLAG(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, (uint32_t)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, (uint32_t)COMP_CSR_COMPxOUT << regshift);
if(level != 0)
{
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)
{
/* 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
*/
HAL_COMP_StateTypeDef 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 /* HAL_COMP_MODULE_ENABLED */
/**
* @}
*/
/**
* @}
*/
#endif /* STM32F051x8 || STM32F058xx || */
/* STM32F071xB || STM32F072xB || STM32F078xx || */
/* STM32F091xC || defined (STM32F098xx) */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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