/**
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******************************************************************************
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* @file stm8s_exti.c
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* @author MCD Application Team
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* @version V2.3.0
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* @date 16-June-2017
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* @brief This file contains all the functions for the EXTI peripheral.
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2>
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*
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* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm8s_exti.h"
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/** @addtogroup STM8S_StdPeriph_Driver
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/* Public functions ----------------------------------------------------------*/
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/**
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* @addtogroup EXTI_Public_Functions
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* @{
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*/
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/**
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* @brief Deinitializes the external interrupt control registers to their default reset value.
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* @param None
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* @retval None
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*/
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void EXTI_DeInit(void)
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{
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EXTI->CR1 = EXTI_CR1_RESET_VALUE;
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EXTI->CR2 = EXTI_CR2_RESET_VALUE;
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}
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/**
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* @brief Set the external interrupt sensitivity of the selected port.
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* @warning
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* - The modification of external interrupt sensitivity is only possible when the interrupts are disabled.
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* - The normal behavior is to disable the interrupts before calling this function, and re-enable them after.
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* @param Port The port number to access.
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* @param SensitivityValue The external interrupt sensitivity value to set.
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* @retval None
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* @par Required preconditions:
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* Global interrupts must be disabled before calling this function.
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*/
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void EXTI_SetExtIntSensitivity(EXTI_Port_TypeDef Port, EXTI_Sensitivity_TypeDef SensitivityValue)
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{
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/* Check function parameters */
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assert_param(IS_EXTI_PORT_OK(Port));
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assert_param(IS_EXTI_SENSITIVITY_OK(SensitivityValue));
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/* Set external interrupt sensitivity */
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switch (Port)
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{
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case EXTI_PORT_GPIOA:
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EXTI->CR1 &= (uint8_t)(~EXTI_CR1_PAIS);
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EXTI->CR1 |= (uint8_t)(SensitivityValue);
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break;
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case EXTI_PORT_GPIOB:
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EXTI->CR1 &= (uint8_t)(~EXTI_CR1_PBIS);
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EXTI->CR1 |= (uint8_t)((uint8_t)(SensitivityValue) << 2);
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break;
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case EXTI_PORT_GPIOC:
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EXTI->CR1 &= (uint8_t)(~EXTI_CR1_PCIS);
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EXTI->CR1 |= (uint8_t)((uint8_t)(SensitivityValue) << 4);
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break;
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case EXTI_PORT_GPIOD:
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EXTI->CR1 &= (uint8_t)(~EXTI_CR1_PDIS);
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EXTI->CR1 |= (uint8_t)((uint8_t)(SensitivityValue) << 6);
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break;
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case EXTI_PORT_GPIOE:
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EXTI->CR2 &= (uint8_t)(~EXTI_CR2_PEIS);
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EXTI->CR2 |= (uint8_t)(SensitivityValue);
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break;
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default:
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break;
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}
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}
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/**
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* @brief Set the TLI interrupt sensitivity.
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* @param SensitivityValue The TLI interrupt sensitivity value.
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* @retval None
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* @par Required preconditions:
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* Global interrupts must be disabled before calling this function.
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*/
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void EXTI_SetTLISensitivity(EXTI_TLISensitivity_TypeDef SensitivityValue)
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{
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/* Check function parameters */
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assert_param(IS_EXTI_TLISENSITIVITY_OK(SensitivityValue));
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/* Set TLI interrupt sensitivity */
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EXTI->CR2 &= (uint8_t)(~EXTI_CR2_TLIS);
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EXTI->CR2 |= (uint8_t)(SensitivityValue);
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}
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/**
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* @brief Get the external interrupt sensitivity of the selected port.
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* @param Port The port number to access.
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* @retval EXTI_Sensitivity_TypeDef The external interrupt sensitivity of the selected port.
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*/
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EXTI_Sensitivity_TypeDef EXTI_GetExtIntSensitivity(EXTI_Port_TypeDef Port)
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{
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uint8_t value = 0;
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/* Check function parameters */
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assert_param(IS_EXTI_PORT_OK(Port));
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switch (Port)
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{
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case EXTI_PORT_GPIOA:
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value = (uint8_t)(EXTI->CR1 & EXTI_CR1_PAIS);
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break;
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case EXTI_PORT_GPIOB:
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value = (uint8_t)((uint8_t)(EXTI->CR1 & EXTI_CR1_PBIS) >> 2);
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break;
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case EXTI_PORT_GPIOC:
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value = (uint8_t)((uint8_t)(EXTI->CR1 & EXTI_CR1_PCIS) >> 4);
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break;
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case EXTI_PORT_GPIOD:
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value = (uint8_t)((uint8_t)(EXTI->CR1 & EXTI_CR1_PDIS) >> 6);
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break;
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case EXTI_PORT_GPIOE:
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value = (uint8_t)(EXTI->CR2 & EXTI_CR2_PEIS);
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break;
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default:
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break;
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}
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return((EXTI_Sensitivity_TypeDef)value);
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}
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/**
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* @brief Get the TLI interrupt sensitivity.
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* @param None
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* @retval EXTI_TLISensitivity_TypeDef The TLI interrupt sensitivity read.
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*/
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EXTI_TLISensitivity_TypeDef EXTI_GetTLISensitivity(void)
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{
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uint8_t value = 0;
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/* Get TLI interrupt sensitivity */
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value = (uint8_t)(EXTI->CR2 & EXTI_CR2_TLIS);
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return((EXTI_TLISensitivity_TypeDef)value);
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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