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Diff: targets/cmsis/TARGET_STM/TARGET_NUCLEO_F072RB/stm32f0xx_hal_comp.c
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/cmsis/TARGET_STM/TARGET_NUCLEO_F072RB/stm32f0xx_hal_comp.c Thu May 22 20:00:09 2014 +0100 @@ -0,0 +1,687 @@ +/** + ****************************************************************************** + * @file stm32f0xx_hal_comp.c + * @author MCD Application Team + * @version V1.0.0 + * @date 20-May-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 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 + (++) Enable the SYSCFG APB clock to get write access to comparator register using __SYSCFG_CLK_ENABLE() + (++) 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 output polarity + (++) Select the output redirection + (++) Select the hysteresis level + (++) Select the power mode + + (#) Enable the comparator using HAL_COMP_Start() function + + @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) + +/* Includes ------------------------------------------------------------------*/ +#include "stm32f0xx_hal.h" + +/** @addtogroup STM32F0xx_HAL_Driver + * @{ + */ + +/** @defgroup COMP + * @brief COMP HAL module driver + * @{ + */ + +#ifdef HAL_COMP_MODULE_ENABLED + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/* CSR register reset value */ +#define COMP_CSR_RESET_VALUE ((uint32_t)0x00000000) +/* CSR register Mask */ +#define COMP_CSR_UPDATE_PARAMETERS_MASK ((uint32_t)0x00003FFE) +/* CSR COMPx Shift */ +#define COMP_CSR_COMP1_SHIFT ((uint32_t)0) +#define COMP_CSR_COMP2_SHIFT ((uint32_t)16) + +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +/* Private function prototypes -----------------------------------------------*/ +/* Private functions ---------------------------------------------------------*/ + +/** @defgroup COMP_Private_Functions + * @{ + */ + +/** @defgroup HAL_COMP_Group1 Initialization/de-initialization functions + * @brief Initialization and Configuration functions + * +@verbatim + =============================================================================== + ##### Initialization/de-initialization 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 tmpreg = 0; + + /* Check the COMP handle allocation and lock status */ + if((hcomp == NULL) || (hcomp->State & COMP_STATE_BIT_LOCK)) + { + 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_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.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 == COMP1) + { + tmpreg = hcomp->Instance->CSR; + tmpreg = (tmpreg & ~COMP_CSR_UPDATE_PARAMETERS_MASK); + tmpreg = tmpreg | hcomp->Init.InvertingInput | \ + hcomp->Init.Output | \ + hcomp->Init.OutputPol | \ + hcomp->Init.Hysteresis | \ + hcomp->Init.Mode; + hcomp->Instance->CSR = tmpreg; + } + else + { + tmpreg = (COMP->CSR); + tmpreg = (tmpreg & ~(COMP_CSR_UPDATE_PARAMETERS_MASK<<COMP_CSR_COMP2_SHIFT)); + tmpreg = tmpreg | (((hcomp->Init.InvertingInput | \ + hcomp->Init.Output | \ + hcomp->Init.OutputPol | \ + hcomp->Init.Hysteresis | \ + hcomp->Init.Mode) << COMP_CSR_COMP2_SHIFT) | \ + hcomp->Init.WindowMode); + COMP->CSR = tmpreg; + } + + /* 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; + + /* Check the COMP handle allocation and lock status */ + if((hcomp == NULL) || (hcomp->State & COMP_STATE_BIT_LOCK)) + { + 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 == COMP1) + { + MODIFY_REG(hcomp->Instance->CSR, + (COMP_CSR_UPDATE_PARAMETERS_MASK), + (COMP_CSR_RESET_VALUE)); + } + else + { + MODIFY_REG(COMP->CSR, + (COMP_CSR_UPDATE_PARAMETERS_MASK << COMP_CSR_COMP2_SHIFT), + (COMP_CSR_RESET_VALUE)); + } + + /* 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 HAL_COMP_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; + + /* Check the COMP handle allocation and lock status */ + if((hcomp == NULL) || (hcomp->State & COMP_STATE_BIT_LOCK)) + { + 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 == COMP1) + { + SET_BIT(hcomp->Instance->CSR, (COMP_CSR_COMP1EN)); + } + else + { + SET_BIT(COMP->CSR, (COMP_CSR_COMP1EN << COMP_CSR_COMP2_SHIFT)); + } + 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; + + /* Check the COMP handle allocation and lock status */ + if((hcomp == NULL) || (hcomp->State & COMP_STATE_BIT_LOCK)) + { + 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 == COMP1) + { + CLEAR_BIT(hcomp->Instance->CSR, (COMP_CSR_COMP1EN )); + } + else + { + CLEAR_BIT(COMP->CSR, (COMP_CSR_COMP1EN << COMP_CSR_COMP2_SHIFT)); + } + 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; + + 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) + { + __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) + { + __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 HAL_COMP_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; + + /* Check the COMP handle allocation and lock status */ + if((hcomp == NULL) || (hcomp->State & COMP_STATE_BIT_LOCK)) + { + 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 == COMP1) + { + SET_BIT(hcomp->Instance->CSR, (COMP_CSR_COMP1LOCK )); + } + else + { + SET_BIT(COMP->CSR, (COMP_CSR_COMP1LOCK << COMP_CSR_COMP2_SHIFT)); + } + } + + 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; + + /* Check the parameter */ + assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); + + if(hcomp->Instance == COMP1) + { + level = READ_BIT(hcomp->Instance->CSR, (COMP_CSR_COMP1OUT )); + } + else + { + level = READ_BIT(COMP->CSR, (COMP_CSR_COMP1OUT << COMP_CSR_COMP2_SHIFT)); + } + + 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 HAL_COMP_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 */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/