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Diffstat (limited to 'thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Libraries/STM32F30x_StdPeriph_Driver/src/stm32f30x_comp.c')
| -rw-r--r-- | thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Libraries/STM32F30x_StdPeriph_Driver/src/stm32f30x_comp.c | 503 |
1 files changed, 503 insertions, 0 deletions
diff --git a/thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Libraries/STM32F30x_StdPeriph_Driver/src/stm32f30x_comp.c b/thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Libraries/STM32F30x_StdPeriph_Driver/src/stm32f30x_comp.c new file mode 100644 index 0000000..b455973 --- /dev/null +++ b/thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Libraries/STM32F30x_StdPeriph_Driver/src/stm32f30x_comp.c @@ -0,0 +1,503 @@ +/** + ****************************************************************************** + * @file stm32f30x_comp.c + * @author MCD Application Team + * @version V1.0.1 + * @date 23-October-2012 + * @brief This file provides firmware functions to manage the following + * functionalities of the 7 analog comparators (COMP1, COMP2...COMP7) peripheral: + * + Comparators configuration + * + Window mode control + * + @verbatim + + ============================================================================== + ##### COMP Peripheral features ##### + ============================================================================== + [..] + The device integrates 7 analog comparators COMP1, COMP2...COMP7: + (#) The non inverting input and inverting input can be set to GPIO pins + as shown in table1. COMP Inputs below. + + (#) The COMP output is internally is available using 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, TIM3...) + Refer to table 3. COMP Outputs redirection to embedded timers below. + + (#) The comparators COMP1 and COMP2, COMP3 and COMP4, COMP5 and COMP6 can be combined in window + mode and only COMP1, COMP3 and COMP5 non inverting input can be used as non-inverting input. + + (#) The seven 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 + (++) COMP3 is internally connected to EXTI Line 29 + (++) COMP4 is internally connected to EXTI Line 30 + (++) COMP5 is internally connected to EXTI Line 31 + (++) COMP6 is internally connected to EXTI Line 32 + (++) COMP7 is internally connected to EXTI Line 33 + + [..] Table 1. COMP Inputs + +------------------------------------------------------------------------------------------+ + | | | COMP1 | COMP2 | COMP3 | COMP4 | COMP5 | COMP6 | COMP7 | + |-----------------|----------------|---------------|---------------------------------------| + | | 1/4 VREFINT | OK | OK | OK | OK | OK | OK | OK | + | | 1/2 VREFINT | OK | OK | OK | OK | OK | OK | OK | + | | 3/4 VREFINT | OK | OK | OK | OK | OK | OK | OK | + | Inverting Input | VREFINT | OK | OK | OK | OK | OK | OK | OK | + | | DAC1 OUT (PA4) | OK | OK | OK | OK | OK | OK | OK | + | | DAC2 OUT (PA5) | OK | OK | OK | OK | OK | OK | OK | + | | IO1 | PA0 | PA2 | PD15 | PE8 | PD13 | PD10 | PC0 | + | | IO2 | --- | --- | PB12 | PB2 | PB10 | PB15 | --- | + |-----------------|----------------|-------|-------|-------|-------|-------|-------|-------| + | Non Inverting | IO1 | PA1 | PA7 | PB14 | PB0 | PD12 | PD11 | PA0 | + | Input | IO2 | --- | PA3 | PD14 | PE7 | PB13 | PB11 | PC1 | + +------------------------------------------------------------------------------------------+ + + [..] Table 2. COMP Outputs + +-------------------------------------------------------+ + | COMP1 | COMP2 | COMP3 | COMP4 | COMP5 | COMP6 | COMP7 | + |-------|-------|-------|-------|-------|-------|-------| + | PA0 | PA2 | PB1 | PC8 | PC7 | PA10 | PC2 | + | PF4 | PA7 | --- | PA8 | PA9 | PC6 | --- | + | PA6 | PA12 | --- | --- | --- | --- | --- | + | PA11 | PB9 | --- | --- | --- | --- | --- | + | PB8 | --- | --- | --- | --- | --- | --- | + +-------------------------------------------------------+ + + [..] Table 3. COMP Outputs redirection to embedded timers + +----------------------------------------------------------------------------------------------------------------------+ + | COMP1 | COMP2 | COMP3 | COMP4 | COMP5 | COMP6 | COMP7 | + |----------------|----------------|----------------|----------------|----------------|----------------|----------------| + | TIM1 BKIN | TIM1 BKIN | TIM1 BKIN | TIM1 BKIN | TIM1 BKIN | TIM1 BKIN | TIM1 BKIN | + | | | | | | | | + | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | + | | | | | | | | + | TIM8 BKIN | TIM8 BKIN | TIM8 BKIN | TIM8 BKIN | TIM8 BKIN | TIM8 BKIN | TIM8 BKIN | + | | | | | | | | + | TIM8 BKIN2 | TIM8 BKIN2 | TIM8 BKIN2 | TIM8 BKIN2 | TIM8 BKIN2 | TIM8 BKIN2 | TIM8 BKIN2 | + | | | | | | | | + | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | + | + | + | + | + | + | + | + | + | TIM8BKIN2 | TIM8BKIN2 | TIM8BKIN2 | TIM8BKIN2 | TIM8BKIN2 | TIM8BKIN2 | TIM8BKIN2 | + | | | | | | | | + | TIM1 OCREFCLR | TIM1 OCREFCLR | TIM1 OCREFCLR | TIM8 OCREFCLR | TIM8 OCREFCLR | TIM8 OCREFCLR | TIM1 OCREFCLR | + | | | | | | | | + | TIM1 IC1 | TIM1 IC1 | TIM2 OCREFCLR | TIM3 IC3 | TIM2 IC1 | TIM2 IC2 | TIM8 OCREFCLR | + | | | | | | | | + | TIM2 IC4 | TIM2 IC4 | TIM3 IC2 | TIM3 OCREFCLR | TIM3 OCREFCLR | TIM2 OCREFCLR | TIM2 IC3 | + | | | | | | | | + | TIM2 OCREFCLR | TIM2 OCREFCLR | TIM4 IC1 | TIM4 IC2 | TIM4 IC3 | TIM16 OCREFCLR| TIM1 IC2 | + | | | | | | | | + | TIM3 IC1 | TIM3 IC1 | TIM15 IC1 | TIM15 OCREFCLR| TIM16 BKIN | TIM16 IC1 | TIM17 OCREFCLR| + | | | | | | | | + | TIM3 OCREFCLR | TIM3 OCREFCLR | TIM15 BKIN | TIM15 IC2 | TIM17 IC1 | TIM4 IC4 | TIM17 BKIN | + +----------------------------------------------------------------------------------------------------------------------+ + + [..] Table 4. COMP Outputs blanking sources + +----------------------------------------------------------------------------------------------------------------------+ + | COMP1 | COMP2 | COMP3 | COMP4 | COMP5 | COMP6 | COMP7 | + |----------------|----------------|----------------|----------------|----------------|----------------|----------------| + | TIM1 OC5 | TIM1 OC5 | TIM1 OC5 | TIM3 OC4 | TIM3 OC3 | TIM2 OC4 | TIM1 OC5 | + | | | | | | | | + | TIM2 OC3 | TIM2 OC3 | -------- | TIM8 OC5 | TIM8 OC5 | TIM8 OC5 | TIM8 OC5 | + | | | | | | | | + | TIM3 OC3 | TIM3 OC3 | TIM2 OC4 | TIM15 OC1 | TIM8 BKIN | TIM15 OC2 | TIM15 OC2 | + | | | | | | | | + +----------------------------------------------------------------------------------------------------------------------+ + + + ##### How to use this driver ##### + ============================================================================== + [..] + This driver provides functions to configure and program the Comparators + of all STM32F30x 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 non-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 "stm32f30x_comp.h" + +/** @addtogroup STM32F30x_StdPeriph_Driver + * @{ + */ + +/** @defgroup COMP + * @brief COMP driver modules + * @{ + */ + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/* CSR register Mask */ +#define COMP_CSR_CLEAR_MASK ((uint32_t)0x00000003) + +/* 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 COMP_Selection: the selected comparator. + * This parameter can be COMP_Selection_COMPx where x can be 1 to 7 + * to select the COMP peripheral. + * @param None + * @retval None + */ +void COMP_DeInit(uint32_t COMP_Selection) +{ + /*!< Set COMP_CSR register to reset value */ + *(__IO uint32_t *) (COMP_BASE + COMP_Selection) = ((uint32_t)0x00000000); +} + +/** + * @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 COMP_Selection_COMPx where x can be 1 to 7 + * to select the COMP peripheral. + * @param COMP_InitStruct: pointer to an COMP_InitTypeDef structure that contains + * the configuration information for the specified COMP peripheral. + * - COMP_InvertingInput specifies the inverting input of COMP + * - COMP_NonInvertingInput specifies the non inverting input of COMP + * - COMP_Output connect COMP output to selected timer + * input (Input capture / Output Compare Reference Clear / Break Input) + * - COMP_BlankingSrce specifies the blanking source of COMP + * - COMP_OutputPol select output polarity + * - COMP_Hysteresis configures COMP hysteresis value + * - COMP_Mode configures COMP power mode + * @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_NONINVERTING_INPUT(COMP_InitStruct->COMP_NonInvertingInput)); + assert_param(IS_COMP_OUTPUT(COMP_InitStruct->COMP_Output)); + assert_param(IS_COMP_BLANKING_SOURCE(COMP_InitStruct->COMP_BlankingSrce)); + 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 COMPx_CSR register value */ + tmpreg = *(__IO uint32_t *) (COMP_BASE + COMP_Selection); + + /*!< Clear the COMP1SW1, COMPxINSEL, COMPxOUTSEL, COMPxPOL, COMPxHYST and COMPxMODE bits */ + tmpreg &= (uint32_t) (COMP_CSR_CLEAR_MASK); + + /*!< Configure COMP: inverting input, output redirection, hysteresis value and power mode */ + /*!< Set COMPxINSEL bits according to COMP_InitStruct->COMP_InvertingInput value */ + /*!< Set COMPxNONINSEL bits according to COMP_InitStruct->COMP_NonInvertingInput value */ + /*!< Set COMPxBLANKING bits according to COMP_InitStruct->COMP_BlankingSrce 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_NonInvertingInput | + COMP_InitStruct->COMP_Output | COMP_InitStruct->COMP_OutputPol | COMP_InitStruct->COMP_BlankingSrce | + COMP_InitStruct->COMP_Hysteresis | COMP_InitStruct->COMP_Mode); + + /*!< Write to COMPx_CSR register */ + *(__IO uint32_t *) (COMP_BASE + COMP_Selection) = 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_NonInvertingInput = COMP_NonInvertingInput_IO1; + COMP_InitStruct->COMP_Output = COMP_Output_None; + COMP_InitStruct->COMP_BlankingSrce = COMP_BlankingSrce_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 COMP_Selection_COMPx where x can be 1 to 7 + * to select the COMP peripheral. + * @param NewState: new state of the COMP peripheral. + * This parameter can be: ENABLE or DISABLE. + * When enabled, the comparator compares the non inverting input with + * the inverting input and the comparison result is available + * on comparator output. + * 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 COMPx peripheral */ + *(__IO uint32_t *) (COMP_BASE + COMP_Selection) |= (uint32_t) (COMP_CSR_COMPxEN); + } + else + { + /* Disable the selected COMP peripheral */ + *(__IO uint32_t *) (COMP_BASE + COMP_Selection) &= (uint32_t)(~COMP_CSR_COMPxEN); + } +} + +/** + * @brief Close or Open the SW1 switch. + * @note If the COMP1 is locked, Close/Open the SW1 switch can't be performed. + * To unlock the configuration, perform a system reset. + * @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 so the SW1 is closed; PA1 is connected to PA4 + * or DISABLE so the SW1 switch is open; PA1 is disconnected from PA4 + * @retval None + */ +void COMP_SwitchCmd(uint32_t COMP_Selection, FunctionalState NewState) +{ + /* Check the parameter */ + assert_param(IS_FUNCTIONAL_STATE(NewState)); + + if (NewState != DISABLE) + { + /* Close SW1 switch */ + *(__IO uint32_t *) (COMP_BASE + COMP_Selection) |= (uint32_t) (COMP_CSR_COMP1SW1); + } + else + { + /* Open SW1 switch */ + *(__IO uint32_t *) (COMP_BASE + COMP_Selection) &= (uint32_t)(~COMP_CSR_COMP1SW1); + } +} + +/** + * @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 COMP_Selection: the selected comparator. + * This parameter can be COMP_Selection_COMPx where x can be 1 to 7 + * to select the COMP peripheral. + * @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 ((*(__IO uint32_t *) (COMP_BASE + COMP_Selection) & (COMP_CSR_COMPxOUT)) != 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. + * Window mode for comparators makes use of two comparators: + * COMP1 and COM2, COMP3 and COMP4, COMP5 and COMP6. + * In window mode, COMPx and COMPx-1 (where x can be 2, 4 or 6) + * non inverting inputs are connected together and only COMPx-1 non + * inverting input can be used. + * e.g When window mode enabled for COMP4, COMP3 non inverting input (PB14 or PD14) + * is to be used. + * @note If the COMPx is locked, ENABLE/DISABLE the window mode can't be performed. + * To unlock the configuration, perform a system reset. + * @param COMP_Selection: the selected comparator. + * This parameter can be COMP_Selection_COMPx where x can be 2, 4 or 6 + * to select the COMP peripheral. + * param NewState: new state of the window mode. + * This parameter can be ENABLE or DISABLE. + * When enbaled, COMPx and COMPx-1 non inverting inputs are connected together. + * When disabled, COMPx and COMPx-1 non inverting inputs are disconnected. + * @retval None + */ +void COMP_WindowCmd(uint32_t COMP_Selection, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_FUNCTIONAL_STATE(NewState)); + assert_param(IS_COMP_WINDOW(COMP_Selection)); + + if (NewState != DISABLE) + { + /* Enable the window mode */ + *(__IO uint32_t *) (COMP_BASE + COMP_Selection) |= (uint32_t) COMP_CSR_COMPxWNDWEN; + } + else + { + /* Disable the window mode */ + *(__IO uint32_t *) (COMP_BASE + COMP_Selection) &= (uint32_t)(~COMP_CSR_COMPxWNDWEN); + } +} + +/** + * @} + */ + +/** @defgroup COMP_Group3 COMP configuration locking function + * @brief COMP1, COMP2,...COMP7 configuration locking function + * COMP1, COMP2,...COMP7 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: the selected comparator. + * This parameter can be COMP_Selection_COMPx where x can be 1 to 7 + * to select the COMP peripheral. + * @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 */ + *(__IO uint32_t *) (COMP_BASE + COMP_Selection) |= (uint32_t) (COMP_CSR_COMPxLOCK); +} + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |