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Diffstat (limited to 'thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Libraries/STM32F37x_StdPeriph_Driver/src/stm32f37x_comp.c')
| -rw-r--r-- | thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Libraries/STM32F37x_StdPeriph_Driver/src/stm32f37x_comp.c | 407 |
1 files changed, 407 insertions, 0 deletions
diff --git a/thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Libraries/STM32F37x_StdPeriph_Driver/src/stm32f37x_comp.c b/thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Libraries/STM32F37x_StdPeriph_Driver/src/stm32f37x_comp.c new file mode 100644 index 0000000..5360729 --- /dev/null +++ b/thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Libraries/STM32F37x_StdPeriph_Driver/src/stm32f37x_comp.c @@ -0,0 +1,407 @@ +/** + ****************************************************************************** + * @file stm32f37x_comp.c + * @author MCD Application Team + * @version V1.0.0 + * @date 20-September-2012 + * @brief This file provides firmware functions to manage the following + * functionalities of the comparators (COMP1 and COMP2) peripheral: + * + Comparators configuration + * + Window mode control + * + * @verbatim + * + =============================================================================== + ##### How to use this driver ##### + =============================================================================== + [..] + The device integrates two analog comparators COMP1 and COMP2: + + (+) The non inverting input is set to PA1 for COMP1 and to PA3 + for COMP2. + + (+) The inverting input can be selected among: DAC_OUT1, + 1/4 VREFINT, 1/2 VERFINT, 3/4 VREFINT, VREFINT, + I/O (PA0 for COMP1 and PA2 for COMP2) + + (+) The COMP output is internally is available using COMP_GetOutputLevel() + and can be set on GPIO pins: PA0, PA6, PA11 for COMP1 + and PA2, PA7, PA12 for COMP2 + + (+) The COMP output can be redirected to embedded timers (TIM1, TIM2 + and TIM3) + + (+) The two comparators COMP1 and COMP2 can be combined in window + mode and only COMP1 non inverting (PA1) can be used as non- + inverting input. + + (+) The two comparators COMP1 and COMP2 have interrupt capability + with wake-up from Sleep and Stop modes (through the EXTI controller). + COMP1 and COMP2 outputs are internally connected to EXTI Line 21 + and EXTI Line 22 respectively. + + + ##### How to configure the comparator ##### + =============================================================================== + [..] + This driver provides functions to configure and program the Comparators + of all STM32F37x devices. + + [..] To use the comparator, perform the following steps: + + (#) Enable the SYSCFG APB clock to get write access to comparator + register using RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); + + (#) Configure the comparator input in analog mode using GPIO_Init() + + (#) Configure the comparator output in alternate function mode + using GPIO_Init() and use GPIO_PinAFConfig() function to map the + comparator output to the GPIO pin + + (#) Configure the comparator using 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 COMP_Cmd() function + + (#) If required enable the COMP interrupt by configuring and enabling + EXTI line in Interrupt mode and selecting the desired sensitivity + level using EXTI_Init() function. After that enable the comparator + interrupt vector using NVIC_Init() function. + + @endverbatim + * + ****************************************************************************** + * @attention + * + * <h2><center>© COPYRIGHT 2012 STMicroelectronics</center></h2> + * + * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); + * You may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.st.com/software_license_agreement_liberty_v2 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32f37x_comp.h" + +/** @addtogroup STM32F37x_StdPeriph_Driver + * @{ + */ + +/** @defgroup COMP + * @brief COMP driver modules + * @{ + */ + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/* CSR register Mask */ +#define COMP_CSR_CLEAR_MASK ((uint32_t)0x00003FFE) + +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +/* Private function prototypes -----------------------------------------------*/ +/* Private functions ---------------------------------------------------------*/ + +/** @defgroup COMP_Private_Functions + * @{ + */ + +/** @defgroup COMP_Group1 Initialization and Configuration functions + * @brief Initialization and Configuration functions + * +@verbatim + =============================================================================== + ##### Initialization and Configuration functions ##### + =============================================================================== + +@endverbatim + * @{ + */ + +/** + * @brief Deinitializes COMP peripheral registers to their default reset values. + * @note Deinitialization can't be performed if the COMP configuration is locked. + * To unlock the configuration, perform a system reset. + * @param None + * @retval None + */ +void COMP_DeInit(void) +{ + COMP->CSR = ((uint32_t)0x00000000); /*!< Set COMP_CSR register to reset value */ +} + +/** + * @brief Initializes the COMP peripheral according to the specified parameters + * in COMP_InitStruct + * @note If the selected comparator is locked, initialization can't be performed. + * To unlock the configuration, perform a system reset. + * @note By default, PA1 is selected as COMP1 non inverting input. + * To use PA4 as COMP1 non inverting input call COMP_SwitchCmd() after COMP_Init() + * @param COMP_Selection: the selected comparator. + * This parameter can be one of the following values: + * @arg COMP_Selection_COMP1: COMP1 selected + * @arg COMP_Selection_COMP2: COMP2 selected + * @param COMP_InitStruct: pointer to an COMP_InitTypeDef structure that contains + * the configuration information for the specified COMP peripheral. + * @retval None + */ +void COMP_Init(uint32_t COMP_Selection, COMP_InitTypeDef* COMP_InitStruct) +{ + uint32_t tmpreg = 0; + + /* Check the parameters */ + assert_param(IS_COMP_ALL_PERIPH(COMP_Selection)); + assert_param(IS_COMP_INVERTING_INPUT(COMP_InitStruct->COMP_InvertingInput)); + assert_param(IS_COMP_OUTPUT(COMP_InitStruct->COMP_Output)); + assert_param(IS_COMP_OUTPUT_POL(COMP_InitStruct->COMP_OutputPol)); + assert_param(IS_COMP_HYSTERESIS(COMP_InitStruct->COMP_Hysteresis)); + assert_param(IS_COMP_MODE(COMP_InitStruct->COMP_Mode)); + + /*!< Get the COMP_CSR register value */ + tmpreg = COMP->CSR; + + /*!< Clear the COMP1SW1, COMPx_IN_SEL, COMPx_OUT_TIM_SEL, COMPx_POL, COMPx_HYST and COMPx_PWR_MODE bits */ + tmpreg &= (uint32_t) ~(COMP_CSR_CLEAR_MASK<<COMP_Selection); + + /*!< Configure COMP: inverting input, output redirection, hysteresis value and power mode */ + /*!< Set COMPxINSEL bits according to COMP_InitStruct->COMP_InvertingInput value */ + /*!< Set COMPxOUTSEL bits according to COMP_InitStruct->COMP_Output value */ + /*!< Set COMPxPOL bit according to COMP_InitStruct->COMP_OutputPol value */ + /*!< Set COMPxHYST bits according to COMP_InitStruct->COMP_Hysteresis value */ + /*!< Set COMPxMODE bits according to COMP_InitStruct->COMP_Mode value */ + tmpreg |= (uint32_t)((COMP_InitStruct->COMP_InvertingInput | COMP_InitStruct->COMP_Output | + COMP_InitStruct->COMP_OutputPol | COMP_InitStruct->COMP_Hysteresis | + COMP_InitStruct->COMP_Mode)<<COMP_Selection); + + /*!< Write to COMP_CSR register */ + COMP->CSR = tmpreg; +} + +/** + * @brief Fills each COMP_InitStruct member with its default value. + * @param COMP_InitStruct: pointer to an COMP_InitTypeDef structure which will + * be initialized. + * @retval None + */ +void COMP_StructInit(COMP_InitTypeDef* COMP_InitStruct) +{ + COMP_InitStruct->COMP_InvertingInput = COMP_InvertingInput_1_4VREFINT; + COMP_InitStruct->COMP_Output = COMP_Output_None; + COMP_InitStruct->COMP_OutputPol = COMP_OutputPol_NonInverted; + COMP_InitStruct->COMP_Hysteresis = COMP_Hysteresis_No; + COMP_InitStruct->COMP_Mode = COMP_Mode_UltraLowPower; +} + +/** + * @brief Enable or disable the COMP peripheral. + * @note If the selected comparator is locked, enable/disable can't be performed. + * To unlock the configuration, perform a system reset. + * @param COMP_Selection: the selected comparator. + * This parameter can be one of the following values: + * @arg COMP_Selection_COMP1: COMP1 selected + * @arg COMP_Selection_COMP2: COMP2 selected + * @param NewState: new state of the COMP peripheral. + * This parameter can be: ENABLE or DISABLE. + * @note When enabled, the comparator compares the non inverting input with + * the inverting input and the comparison result is available on comparator output. + * @note When disabled, the comparator doesn't perform comparison and the + * output level is low. + * @retval None + */ +void COMP_Cmd(uint32_t COMP_Selection, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_COMP_ALL_PERIPH(COMP_Selection)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + + if (NewState != DISABLE) + { + /* Enable the selected COMP peripheral */ + COMP->CSR |= (uint32_t) (1<<COMP_Selection); + } + else + { + /* Disable the selected COMP peripheral */ + COMP->CSR &= (uint32_t)(~((uint32_t)1<<COMP_Selection)); + } +} + +/** + * @brief Close or Open the SW1 switch. + * @note This switch is solely intended to redirect signals onto high + * impedance input, such as COMP1 non-inverting input (highly resistive switch) + * @param NewState: New state of the analog switch. + * This parameter can be: ENABLE or DISABLE. + * @note When enabled, the SW1 is closed; PA1 is connected to PA4 + * @note When disabled, the SW1 switch is open; PA1 is disconnected from PA4 + * @retval None + */ +void COMP_SwitchCmd(FunctionalState NewState) +{ + /* Check the parameter */ + assert_param(IS_FUNCTIONAL_STATE(NewState)); + + if (NewState != DISABLE) + { + /* Close SW1 switch */ + COMP->CSR |= (uint32_t) (COMP_CSR_COMP1SW1); + } + else + { + /* Open SW1 switch */ + COMP->CSR &= (uint32_t)(~COMP_CSR_COMP1SW1); + } +} + +/** + * @brief Return the output level (high or low) of the selected comparator. + * @note The output level depends on the selected polarity. + * @note 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 + * @note 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 COMP_Selection: the selected comparator. + * This parameter can be one of the following values: + * @arg COMP_Selection_COMP1: COMP1 selected + * @arg COMP_Selection_COMP2: COMP2 selected + * @retval Returns the selected comparator output level: low or high. + * + */ +uint32_t COMP_GetOutputLevel(uint32_t COMP_Selection) +{ + uint32_t compout = 0x0; + + /* Check the parameters */ + assert_param(IS_COMP_ALL_PERIPH(COMP_Selection)); + + /* Check if selected comparator output is high */ + if ((COMP->CSR & (COMP_CSR_COMP1OUT<<COMP_Selection)) != 0) + { + compout = COMP_OutputLevel_High; + } + else + { + compout = COMP_OutputLevel_Low; + } + + /* Return the comparator output level */ + return (uint32_t)(compout); +} + +/** + * @} + */ + +/** @defgroup COMP_Group2 Window mode control function + * @brief Window mode control function + * +@verbatim + =============================================================================== + ##### Window mode control function ##### + =============================================================================== + +@endverbatim + * @{ + */ + +/** + * @brief Enables or disables the window mode. + * @note In window mode, COMP1 and COMP2 non inverting inputs are connected + * together and only COMP1 non inverting input (PA1) can be used. + * @param NewState: new state of the window mode. + * This parameter can be : + * @arg ENABLE: COMP1 and COMP2 non inverting inputs are connected together. + * @arg DISABLE: OMP1 and COMP2 non inverting inputs are disconnected. + * @retval None + */ +void COMP_WindowCmd(FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_FUNCTIONAL_STATE(NewState)); + + if (NewState != DISABLE) + { + /* Enable the window mode */ + COMP->CSR |= (uint32_t) COMP_CSR_WNDWEN; + } + else + { + /* Disable the window mode */ + COMP->CSR &= (uint32_t)(~COMP_CSR_WNDWEN); + } +} + +/** + * @} + */ + +/** @defgroup COMP_Group3 COMP configuration locking function + * @brief COMP1 and COMP2 configuration locking function + * COMP1 and COMP2 configuration can be locked each separately. + * Unlocking is performed by system reset. + * +@verbatim + =============================================================================== + ##### Configuration Lock function ##### + =============================================================================== + +@endverbatim + * @{ + */ + +/** + * @brief Lock the selected comparator (COMP1/COMP2) configuration. + * @note Locking the configuration means that all control bits are read-only. + * To unlock the comparator configuration, perform a system reset. + * @param COMP_Selection: selects the comparator to be locked + * This parameter can be a value of the following values: + * @arg COMP_Selection_COMP1: COMP1 configuration is locked. + * @arg COMP_Selection_COMP2: COMP2 configuration is locked. + * @retval None + */ +void COMP_LockConfig(uint32_t COMP_Selection) +{ + /* Check the parameter */ + assert_param(IS_COMP_ALL_PERIPH(COMP_Selection)); + + /* Set the lock bit corresponding to selected comparator */ + COMP->CSR |= (uint32_t) (COMP_CSR_COMP1LOCK<<COMP_Selection); +} + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |