/** * @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) != 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 EXTI Line event mode if any */ CLEAR_BIT(EXTI->EMR1, COMP_GET_EXTI_LINE(hcomp->Instance)); /* Disable the selected comparator */ CLEAR_BIT(hcomp->Instance->CSR, COMP_CSR_EN); hcomp->State = HAL_COMP_STATE_READY; } else { status = HAL_ERROR; } } return status; }
/** * @brief Comparator IRQ handler. * @param hcomp COMP handle * @retval None */ void HAL_COMP_IRQHandler(COMP_HandleTypeDef *hcomp) { /* Get the EXTI line corresponding to the selected COMP instance */ uint32_t exti_line = COMP_GET_EXTI_LINE(hcomp->Instance); /* Check COMP EXTI flag */ if(LL_EXTI_IsActiveFlag_0_31(exti_line) != RESET) { /* Check whether comparator is in independent or window mode */ if(READ_BIT(COMP12_COMMON->CSR, COMP_CSR_WINMODE) != RESET) { /* Clear COMP EXTI line pending bit of the pair of comparators */ /* in window mode. */ /* Note: Pair of comparators in window mode can both trig IRQ when */ /* input voltage is changing from "out of window" area */ /* (low or high ) to the other "out of window" area (high or low).*/ /* Both flags must be cleared to call comparator trigger */ /* callback is called once. */ LL_EXTI_ClearFlag_0_31((COMP_EXTI_LINE_COMP1 | COMP_EXTI_LINE_COMP2)); } else { /* Clear COMP EXTI line pending bit */ LL_EXTI_ClearFlag_0_31(exti_line); } /* COMP trigger user callback */ HAL_COMP_TriggerCallback(hcomp); } }
/** * @brief Comparator IRQ Handler * @param hcomp: COMP handle * @retval HAL status */ void HAL_COMP_IRQHandler(COMP_HandleTypeDef *hcomp) { /* Check which exti line is involved */ uint32_t extiline = COMP_GET_EXTI_LINE(hcomp->Instance); /* Manage COMP1 Exti line */ if (extiline == COMP_EXTI_LINE_COMP1) { if(__HAL_COMP_COMP1_EXTI_GET_FLAG() != RESET) { /* Clear COMP Exti pending bit */ __HAL_COMP_COMP1_EXTI_CLEAR_FLAG(); /* COMP trigger user callback */ HAL_COMP_TriggerCallback(hcomp); } } /* Manage COMP2 Exti line */ if (extiline == COMP_EXTI_LINE_COMP2) { if(__HAL_COMP_COMP2_EXTI_GET_FLAG() != RESET) { /* Clear COMP Exti pending bit */ __HAL_COMP_COMP2_EXTI_CLEAR_FLAG(); /* COMP trigger user callback */ HAL_COMP_TriggerCallback(hcomp); } } }
/** * @brief Start the comparator in Interrupt mode. * @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 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) { /* Get the EXTI Line output configuration */ extiline = COMP_GET_EXTI_LINE(hcomp->Instance); /* Configure the trigger rising edge */ if((hcomp->Init.TriggerMode & COMP_TRIGGERMODE_IT_RISING) != RESET) { SET_BIT(EXTI->RTSR1, extiline); } else { CLEAR_BIT(EXTI->RTSR1, extiline); } /* Configure the trigger falling edge */ if((hcomp->Init.TriggerMode & COMP_TRIGGERMODE_IT_FALLING) != RESET) { SET_BIT(EXTI->FTSR1, extiline); } else { CLEAR_BIT(EXTI->FTSR1, extiline); } /* Clear COMP EXTI pending bit */ WRITE_REG(EXTI->PR1, extiline); /* Enable the selected comparator */ SET_BIT(hcomp->Instance->CSR, COMP_CSR_EN); /* Enable EXTI interrupt mode */ SET_BIT(EXTI->IMR1, extiline); hcomp->State = HAL_COMP_STATE_BUSY; } else { status = HAL_ERROR; } } 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; if (COMP_GET_EXTI_LINE(hcomp->Instance) == COMP_EXTI_LINE_COMP1) { __HAL_COMP_COMP1_EXTI_DISABLE_IT(); } if (COMP_GET_EXTI_LINE(hcomp->Instance) == COMP_EXTI_LINE_COMP2) { __HAL_COMP_COMP2_EXTI_DISABLE_IT(); } status = HAL_COMP_Stop(hcomp); return status; }
/** * @brief Stop the comparator in Interrupt mode. * @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->IMR1, 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->PR1, extiline) != RESET) { /* Clear COMP EXTI pending bit */ WRITE_REG(EXTI->PR1, extiline); /* COMP trigger user callback */ HAL_COMP_TriggerCallback(hcomp); } }
/** * @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(COMP_EXTI_GET_FLAG(extiline) != RESET) { /* Clear COMP EXTI pending bit */ COMP_EXTI_CLEAR_FLAG(extiline); /* COMP trigger user callback */ HAL_COMP_TriggerCallback(hcomp); } }
/** * @brief Comparator IRQ handler. * @param hcomp COMP handle * @retval None */ void HAL_COMP_IRQHandler(COMP_HandleTypeDef *hcomp) { /* Get the EXTI line corresponding to the selected COMP instance */ uint32_t exti_line = COMP_GET_EXTI_LINE(hcomp->Instance); /* Check COMP EXTI flag */ if(READ_BIT(EXTI->PR, exti_line) != RESET) { /* Clear COMP EXTI pending bit */ WRITE_REG(EXTI->PR, exti_line); /* COMP trigger user callback */ HAL_COMP_TriggerCallback(hcomp); } }
/** * @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 parameter */ assert_param(IS_COMP_TRIGGERMODE(hcomp->Init.TriggerMode)); /* Get the Exti Line output configuration */ extiline = COMP_GET_EXTI_LINE(hcomp->Instance); /* Configure the trigger rising edge */ if((hcomp->Init.TriggerMode & COMP_TRIGGERMODE_IT_RISING) != RESET) { SET_BIT(EXTI->RTSR, extiline); } else { CLEAR_BIT(EXTI->RTSR, extiline); } /* Configure the trigger 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 Initialize the COMP according to the specified * parameters in the COMP_InitTypeDef and initialize the associated handle. * @note If the selected comparator is locked, initialization can't be performed. * To unlock the configuration, perform a system reset. * @note When the LPTIM connection is enabled, the following pins LPTIM_IN1(PB5, PC0) and LPTIM_IN2(PB7, PC2) should not be configured in alternate function. * @param hcomp COMP handle * @retval HAL status */ HAL_StatusTypeDef HAL_COMP_Init(COMP_HandleTypeDef *hcomp) { uint32_t tmp_csr = 0U; uint32_t exti_line = 0U; uint32_t comp_voltage_scaler_not_initialized = 0U; __IO uint32_t wait_loop_index = 0U; HAL_StatusTypeDef status = HAL_OK; /* Check the COMP handle allocation and lock status */ if((hcomp == NULL) || (__HAL_COMP_IS_LOCKED(hcomp))) { status = HAL_ERROR; } else { /* Check the parameters */ assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); assert_param(IS_COMP_INPUT_PLUS(hcomp->Instance, hcomp->Init.NonInvertingInput)); assert_param(IS_COMP_INPUT_MINUS(hcomp->Instance, hcomp->Init.InvertingInput)); assert_param(IS_COMP_OUTPUTPOL(hcomp->Init.OutputPol)); assert_param(IS_COMP_POWERMODE(hcomp->Init.Mode)); assert_param(IS_COMP_TRIGGERMODE(hcomp->Init.TriggerMode)); assert_param(IS_COMP_WINDOWMODE(hcomp->Init.WindowMode)); if(hcomp->State == HAL_COMP_STATE_RESET) { /* Allocate lock resource and initialize it */ hcomp->Lock = HAL_UNLOCKED; /* Init SYSCFG and the low level hardware to access comparators */ /* Note: HAL_COMP_Init() calls __HAL_RCC_SYSCFG_CLK_ENABLE() */ /* to enable internal control clock of the comparators. */ /* However, this is a legacy strategy. In future STM32 families, */ /* COMP clock enable must be implemented by user */ /* in "HAL_COMP_MspInit()". */ /* Therefore, for compatibility anticipation, it is recommended */ /* to implement __HAL_RCC_SYSCFG_CLK_ENABLE() */ /* in "HAL_COMP_MspInit()". */ __HAL_RCC_SYSCFG_CLK_ENABLE(); /* Init the low level hardware */ HAL_COMP_MspInit(hcomp); } /* Set COMP parameters */ tmp_csr = (hcomp->Init.InvertingInput | hcomp->Init.OutputPol ); /* Configuration specific to comparator instance: COMP2 */ if ((hcomp->Instance) == COMP2) { /* Comparator input plus configuration is available on COMP2 only */ /* Comparator power mode configuration is available on COMP2 only */ tmp_csr |= (hcomp->Init.NonInvertingInput | hcomp->Init.Mode ); /* COMP2 specificity: when using VrefInt or subdivision of VrefInt, */ /* specific path must be enabled. */ if((hcomp->Init.InvertingInput == COMP_INPUT_MINUS_VREFINT) || (hcomp->Init.InvertingInput == COMP_INPUT_MINUS_1_4VREFINT) || (hcomp->Init.InvertingInput == COMP_INPUT_MINUS_1_2VREFINT) || (hcomp->Init.InvertingInput == COMP_INPUT_MINUS_3_4VREFINT) ) { /* Memorize voltage scaler state before initialization */ comp_voltage_scaler_not_initialized = (READ_BIT(SYSCFG->CFGR3, SYSCFG_CFGR3_ENBUFLP_VREFINT_COMP) == 0U); SET_BIT(SYSCFG->CFGR3, SYSCFG_CFGR3_ENBUFLP_VREFINT_COMP ); /* Delay for COMP scaler bridge voltage stabilization */ /* Apply the delay if voltage scaler bridge is enabled for the first time */ if (comp_voltage_scaler_not_initialized != 0U) { /* Wait loop initialization and execution */ /* Note: Variable divided by 2 to compensate partially */ /* CPU processing cycles. */ wait_loop_index = (COMP_DELAY_VOLTAGE_SCALER_STAB_US * (SystemCoreClock / (1000000U * 2U))); while(wait_loop_index != 0U) { wait_loop_index--; } } } } /* Set comparator output connection to LPTIM */ if (hcomp->Init.LPTIMConnection != COMP_LPTIMCONNECTION_DISABLED) { /* LPTIM connexion requested on COMP1 */ if ((hcomp->Instance) == COMP1) { /* Note : COMP1 can be connected to the input 1 of LPTIM if requested */ assert_param(IS_COMP1_LPTIMCONNECTION(hcomp->Init.LPTIMConnection)); if (hcomp->Init.LPTIMConnection == COMP_LPTIMCONNECTION_IN1_ENABLED) { tmp_csr |= (COMP_CSR_COMP1LPTIM1IN1); } } else { /* Check the MCU_ID in order to allow or not the COMP2 connection to LPTIM-input2 */ if (((HAL_GetDEVID() == C_DEV_ID_L073) && (HAL_GetREVID() == C_REV_ID_A)) || ((HAL_GetDEVID() == C_DEV_ID_L053) && (HAL_GetREVID() == C_REV_ID_A)) || ((HAL_GetDEVID() == C_DEV_ID_L053) && (HAL_GetREVID() == C_REV_ID_Z))) { /* Note : COMP2 can be connected only to input 1 of LPTIM if requested */ assert_param(IS_COMP2_LPTIMCONNECTION_RESTRICTED(hcomp->Init.LPTIMConnection)); tmp_csr |= (COMP_CSR_COMP2LPTIM1IN1); } /* LPTIM connexion requested on COMP2 */ else { /* Note : COMP2 can be connected to input 1 or input2 of LPTIM if requested */ assert_param(IS_COMP2_LPTIMCONNECTION(hcomp->Init.LPTIMConnection)); switch (hcomp->Init.LPTIMConnection) { case COMP_LPTIMCONNECTION_IN1_ENABLED : tmp_csr |= (COMP_CSR_COMP2LPTIM1IN1); break; case COMP_LPTIMCONNECTION_IN2_ENABLED : tmp_csr |= (COMP_CSR_COMP2LPTIM1IN2); break; default : break; } } } } /* Update comparator register */ if ((hcomp->Instance) == COMP1) { MODIFY_REG(hcomp->Instance->CSR, COMP_CSR_COMP1INNSEL | COMP_CSR_COMP1WM | COMP_CSR_COMP1LPTIM1IN1 | COMP_CSR_COMP1POLARITY , tmp_csr ); } else /* Instance == COMP2 */ { MODIFY_REG(hcomp->Instance->CSR, COMP_CSR_COMP2SPEED | COMP_CSR_COMP2INNSEL | COMP_CSR_COMP2INPSEL | COMP_CSR_COMP2POLARITY | COMP_CSR_COMP2LPTIM1IN2 | COMP_CSR_COMP2LPTIM1IN1 , tmp_csr ); } /* Set window mode */ /* Note: Window mode bit is located into 1 out of the 2 pairs of COMP */ /* instances. Therefore, this function can update another COMP */ /* instance that the one currently selected. */ if(hcomp->Init.WindowMode == COMP_WINDOWMODE_COMP1_INPUT_PLUS_COMMON) { SET_BIT(COMP12_COMMON->CSR, COMP_CSR_WINMODE); } else { CLEAR_BIT(COMP12_COMMON->CSR, COMP_CSR_WINMODE); } /* Get the EXTI line corresponding to the selected COMP instance */ exti_line = COMP_GET_EXTI_LINE(hcomp->Instance); /* Manage EXTI settings */ if((hcomp->Init.TriggerMode & (COMP_EXTI_IT | COMP_EXTI_EVENT)) != RESET) { /* Configure EXTI rising edge */ if((hcomp->Init.TriggerMode & COMP_EXTI_RISING) != RESET) { SET_BIT(EXTI->RTSR, exti_line); } else { CLEAR_BIT(EXTI->RTSR, exti_line); } /* Configure EXTI falling edge */ if((hcomp->Init.TriggerMode & COMP_EXTI_FALLING) != RESET) { SET_BIT(EXTI->FTSR, exti_line); } else { CLEAR_BIT(EXTI->FTSR, exti_line); } /* Clear COMP EXTI pending bit (if any) */ WRITE_REG(EXTI->PR, exti_line); /* Configure EXTI event mode */ if((hcomp->Init.TriggerMode & COMP_EXTI_EVENT) != RESET) { SET_BIT(EXTI->EMR, exti_line); } else { CLEAR_BIT(EXTI->EMR, exti_line); } /* Configure EXTI interrupt mode */ if((hcomp->Init.TriggerMode & COMP_EXTI_IT) != RESET) { SET_BIT(EXTI->IMR, exti_line); } else { CLEAR_BIT(EXTI->IMR, exti_line); } } else { /* Disable EXTI event generation */ CLEAR_BIT(EXTI->EMR, exti_line); } /* Set HAL COMP handle state */ /* Note: Transition from state reset to state ready, */ /* otherwise (coming from state ready or busy) no state update. */ if (hcomp->State == HAL_COMP_STATE_RESET) { hcomp->State = HAL_COMP_STATE_READY; } } 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 COMP handle allocation and lock status */ if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != 0x00)) { status = HAL_ERROR; } else { /* Check the parameter */ assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); if(hcomp->State == HAL_COMP_STATE_READY) { /* 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) != 0x0) { if (extiline == COMP_EXTI_LINE_COMP1) { __HAL_COMP_COMP1_EXTI_ENABLE_RISING_EDGE(); } else { __HAL_COMP_COMP2_EXTI_ENABLE_RISING_EDGE(); } } else { if (extiline == COMP_EXTI_LINE_COMP1) { __HAL_COMP_COMP1_EXTI_DISABLE_RISING_EDGE(); } else { __HAL_COMP_COMP2_EXTI_DISABLE_RISING_EDGE(); } } /* Configure the falling edge */ if((hcomp->Init.TriggerMode & COMP_TRIGGERMODE_IT_FALLING) != 0x0) { if (extiline == COMP_EXTI_LINE_COMP1) { __HAL_COMP_COMP1_EXTI_ENABLE_FALLING_EDGE(); } else { __HAL_COMP_COMP2_EXTI_ENABLE_FALLING_EDGE(); } } else { if (extiline == COMP_EXTI_LINE_COMP1) { __HAL_COMP_COMP1_EXTI_DISABLE_FALLING_EDGE(); } else { __HAL_COMP_COMP2_EXTI_DISABLE_FALLING_EDGE(); } } /* Configure the COMP module */ if (extiline == COMP_EXTI_LINE_COMP1) { /* Clear COMP Exti pending bit */ __HAL_COMP_COMP1_EXTI_CLEAR_FLAG(); /* Enable Exti interrupt mode */ __HAL_COMP_COMP1_EXTI_ENABLE_IT(); } else { /* Clear COMP Exti pending bit */ __HAL_COMP_COMP2_EXTI_CLEAR_FLAG(); /* Enable Exti interrupt mode */ __HAL_COMP_COMP2_EXTI_ENABLE_IT(); } /* Enable the selected comparator */ __HAL_COMP_ENABLE(hcomp); hcomp->State = HAL_COMP_STATE_BUSY; } else { status = HAL_ERROR; } } return status; }
/** * @brief Start the comparator in Interrupt mode. * @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 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) { /* Configure the EXTI event generation */ if((hcomp->Init.TriggerMode & (COMP_TRIGGERMODE_IT_RISING|COMP_TRIGGERMODE_IT_FALLING)) != RESET) { /* Get the EXTI Line output configuration */ extiline = COMP_GET_EXTI_LINE(hcomp->Instance); /* Configure the trigger rising edge */ if((hcomp->Init.TriggerMode & COMP_TRIGGERMODE_IT_RISING) != RESET) { COMP_EXTI_RISING_ENABLE(extiline); } else { COMP_EXTI_RISING_DISABLE(extiline); } /* Configure the trigger falling edge */ if((hcomp->Init.TriggerMode & COMP_TRIGGERMODE_IT_FALLING) != RESET) { COMP_EXTI_FALLING_ENABLE(extiline); } else { COMP_EXTI_FALLING_DISABLE(extiline); } /* Clear COMP EXTI pending bit if any */ COMP_EXTI_CLEAR_FLAG(extiline); /* Enable EXTI interrupt mode */ COMP_EXTI_ENABLE_IT(extiline); /* Enable the selected comparator */ __HAL_COMP_ENABLE(hcomp); hcomp->State = HAL_COMP_STATE_BUSY; } else { status = HAL_ERROR; } } else { status = HAL_ERROR; } } return status; }
/** * @brief Initialize the COMP according to the specified * parameters in the COMP_InitTypeDef and initialize 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) { uint32_t tmp_csr = 0U; uint32_t exti_line = 0U; uint32_t comp_voltage_scaler_not_initialized = 0U; __IO uint32_t wait_loop_index = 0U; HAL_StatusTypeDef status = HAL_OK; /* Check the COMP handle allocation and lock status */ if((hcomp == NULL) || (__HAL_COMP_IS_LOCKED(hcomp))) { status = HAL_ERROR; } else { /* Check the parameters */ assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); assert_param(IS_COMP_INPUT_PLUS(hcomp->Instance, hcomp->Init.NonInvertingInput)); assert_param(IS_COMP_INPUT_MINUS(hcomp->Instance, hcomp->Init.InvertingInput)); assert_param(IS_COMP_OUTPUTPOL(hcomp->Init.OutputPol)); assert_param(IS_COMP_POWERMODE(hcomp->Init.Mode)); assert_param(IS_COMP_HYSTERESIS(hcomp->Init.Hysteresis)); assert_param(IS_COMP_BLANKINGSRC_INSTANCE(hcomp->Instance, hcomp->Init.BlankingSrce)); assert_param(IS_COMP_TRIGGERMODE(hcomp->Init.TriggerMode)); assert_param(IS_COMP_WINDOWMODE(hcomp->Init.WindowMode)); if(hcomp->State == HAL_COMP_STATE_RESET) { /* Allocate lock resource and initialize it */ hcomp->Lock = HAL_UNLOCKED; /* Init SYSCFG and the low level hardware to access comparators */ /* Note: HAL_COMP_Init() calls __HAL_RCC_SYSCFG_CLK_ENABLE() */ /* to enable internal control clock of the comparators. */ /* However, this is a legacy strategy. In future STM32 families, */ /* COMP clock enable must be implemented by user */ /* in "HAL_COMP_MspInit()". */ /* Therefore, for compatibility anticipation, it is recommended */ /* to implement __HAL_RCC_SYSCFG_CLK_ENABLE() */ /* in "HAL_COMP_MspInit()". */ __HAL_RCC_SYSCFG_CLK_ENABLE(); /* Init the low level hardware */ HAL_COMP_MspInit(hcomp); } /* Memorize voltage scaler state before initialization */ comp_voltage_scaler_not_initialized = (READ_BIT(hcomp->Instance->CSR, COMP_CSR_SCALEN) == 0); /* Set COMP parameters */ tmp_csr = ( hcomp->Init.NonInvertingInput | hcomp->Init.InvertingInput | hcomp->Init.BlankingSrce | hcomp->Init.Hysteresis | hcomp->Init.OutputPol | hcomp->Init.Mode ); /* Set parameters in COMP register */ /* Note: Update all bits except read-only, lock and enable bits */ #if defined (COMP_CSR_INMESEL) MODIFY_REG(hcomp->Instance->CSR, COMP_CSR_PWRMODE | COMP_CSR_INMSEL | COMP_CSR_INPSEL | COMP_CSR_WINMODE | COMP_CSR_POLARITY | COMP_CSR_HYST | COMP_CSR_BLANKING | COMP_CSR_BRGEN | COMP_CSR_SCALEN | COMP_CSR_INMESEL, tmp_csr ); #else MODIFY_REG(hcomp->Instance->CSR, COMP_CSR_PWRMODE | COMP_CSR_INMSEL | COMP_CSR_INPSEL | COMP_CSR_WINMODE | COMP_CSR_POLARITY | COMP_CSR_HYST | COMP_CSR_BLANKING | COMP_CSR_BRGEN | COMP_CSR_SCALEN, tmp_csr ); #endif /* Set window mode */ /* Note: Window mode bit is located into 1 out of the 2 pairs of COMP */ /* instances. Therefore, this function can update another COMP */ /* instance that the one currently selected. */ if(hcomp->Init.WindowMode == COMP_WINDOWMODE_COMP1_INPUT_PLUS_COMMON) { SET_BIT(COMP12_COMMON->CSR, COMP_CSR_WINMODE); } else { CLEAR_BIT(COMP12_COMMON->CSR, COMP_CSR_WINMODE); } /* Delay for COMP scaler bridge voltage stabilization */ /* Apply the delay if voltage scaler bridge is enabled for the first time */ if ((READ_BIT(hcomp->Instance->CSR, COMP_CSR_SCALEN) != 0U) && (comp_voltage_scaler_not_initialized != 0U) ) { /* Wait loop initialization and execution */ /* Note: Variable divided by 2 to compensate partially */ /* CPU processing cycles. */ wait_loop_index = (COMP_DELAY_VOLTAGE_SCALER_STAB_US * (SystemCoreClock / (1000000 * 2U))); while(wait_loop_index != 0U) { wait_loop_index--; } } /* Get the EXTI line corresponding to the selected COMP instance */ exti_line = COMP_GET_EXTI_LINE(hcomp->Instance); /* Manage EXTI settings */ if((hcomp->Init.TriggerMode & (COMP_EXTI_IT | COMP_EXTI_EVENT)) != RESET) { /* Configure EXTI rising edge */ if((hcomp->Init.TriggerMode & COMP_EXTI_RISING) != RESET) { LL_EXTI_EnableRisingTrig_0_31(exti_line); } else { LL_EXTI_DisableRisingTrig_0_31(exti_line); } /* Configure EXTI falling edge */ if((hcomp->Init.TriggerMode & COMP_EXTI_FALLING) != RESET) { LL_EXTI_EnableFallingTrig_0_31(exti_line); } else { LL_EXTI_DisableFallingTrig_0_31(exti_line); } /* Clear COMP EXTI pending bit (if any) */ LL_EXTI_ClearFlag_0_31(exti_line); /* Configure EXTI event mode */ if((hcomp->Init.TriggerMode & COMP_EXTI_EVENT) != RESET) { LL_EXTI_EnableEvent_0_31(exti_line); } else { LL_EXTI_DisableEvent_0_31(exti_line); } /* Configure EXTI interrupt mode */ if((hcomp->Init.TriggerMode & COMP_EXTI_IT) != RESET) { LL_EXTI_EnableIT_0_31(exti_line); } else { LL_EXTI_DisableIT_0_31(exti_line); } } else { /* Disable EXTI event mode */ LL_EXTI_DisableEvent_0_31(exti_line); /* Disable EXTI interrupt mode */ LL_EXTI_DisableIT_0_31(exti_line); } /* Set HAL COMP handle state */ /* Note: Transition from state reset to state ready, */ /* otherwise (coming from state ready or busy) no state update. */ if (hcomp->State == HAL_COMP_STATE_RESET) { hcomp->State = HAL_COMP_STATE_READY; } } return status; }