/**
  ******************************************************************************
  * @file    stm8s_exti.h
  * @author  MCD Application Team
  * @version V2.2.0
  * @date    30-September-2014
  * @brief   This file contains all functions prototype and macros for the EXTI peripheral.
   ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2014 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.
  *
  ******************************************************************************
  */

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __STM8S_EXTI_H
#define __STM8S_EXTI_H

/* Includes ------------------------------------------------------------------*/
#include "stm8s.h"

/* Exported types ------------------------------------------------------------*/

/** @addtogroup EXTI_Exported_Types
  * @{
  */

/**
  * @brief  EXTI Sensitivity values for PORTA to PORTE
  */
typedef enum {
	EXTI_SENSITIVITY_FALL_LOW = (uint8_t) 0x00, /*!< Interrupt on Falling edge and Low level */
	EXTI_SENSITIVITY_RISE_ONLY = (uint8_t) 0x01, /*!< Interrupt on Rising edge only */
	EXTI_SENSITIVITY_FALL_ONLY = (uint8_t) 0x02, /*!< Interrupt on Falling edge only */
	EXTI_SENSITIVITY_RISE_FALL = (uint8_t) 0x03  /*!< Interrupt on Rising and Falling edges */
} EXTI_Sensitivity_TypeDef;

/**
  * @brief  EXTI Sensitivity values for TLI
  */
typedef enum {
	EXTI_TLISENSITIVITY_FALL_ONLY = (uint8_t) 0x00, /*!< Top Level Interrupt on Falling edge only */
	EXTI_TLISENSITIVITY_RISE_ONLY = (uint8_t) 0x04  /*!< Top Level Interrupt on Rising edge only */
} EXTI_TLISensitivity_TypeDef;

/**
  * @brief  EXTI PortNum possible values
  */
typedef enum {
	EXTI_PORT_GPIOA = (uint8_t) 0x00, /*!< GPIO Port A */
	EXTI_PORT_GPIOB = (uint8_t) 0x01, /*!< GPIO Port B */
	EXTI_PORT_GPIOC = (uint8_t) 0x02, /*!< GPIO Port C */
	EXTI_PORT_GPIOD = (uint8_t) 0x03, /*!< GPIO Port D */
	EXTI_PORT_GPIOE = (uint8_t) 0x04  /*!< GPIO Port E */
} EXTI_Port_TypeDef;

/**
  * @}
  */

/* Private macros ------------------------------------------------------------*/

/** @addtogroup EXTI_Private_Macros
  * @{
  */

/**
  * @brief  Macro used by the assert function in order to check the different sensitivity values for PORTA to PORTE.
  */
#define IS_EXTI_SENSITIVITY_OK(SensitivityValue) \
  (((SensitivityValue) == EXTI_SENSITIVITY_FALL_LOW) || \
   ((SensitivityValue) == EXTI_SENSITIVITY_RISE_ONLY) || \
   ((SensitivityValue) == EXTI_SENSITIVITY_FALL_ONLY) || \
   ((SensitivityValue) == EXTI_SENSITIVITY_RISE_FALL))

/**
  * @brief  Macro used by the assert function in order to check the different sensitivity values for TLI.
  */
#define IS_EXTI_TLISENSITIVITY_OK(SensitivityValue) \
  (((SensitivityValue) == EXTI_TLISENSITIVITY_FALL_ONLY) || \
   ((SensitivityValue) == EXTI_TLISENSITIVITY_RISE_ONLY))

/**
  * @brief  Macro used by the assert function in order to check the different Port values
  */
#define IS_EXTI_PORT_OK(PORT) \
  (((PORT) == EXTI_PORT_GPIOA) ||\
   ((PORT) == EXTI_PORT_GPIOB) ||\
   ((PORT) == EXTI_PORT_GPIOC) ||\
   ((PORT) == EXTI_PORT_GPIOD) ||\
   ((PORT) == EXTI_PORT_GPIOE))

/**
  * @brief  Macro used by the assert function in order to check the different values of the EXTI PinMask
  */
#define IS_EXTI_PINMASK_OK(PinMask) ((((PinMask) & (uint8_t)0x00) == (uint8_t)0x00) && ((PinMask) != (uint8_t)0x00))

/**
  * @}
  */

/* Exported functions ------------------------------------------------------- */

/** @addtogroup EXTI_Exported_Functions
  * @{
  */

#if 0
void EXTI_DeInit(void);

void EXTI_SetExtIntSensitivity(EXTI_Port_TypeDef Port, EXTI_Sensitivity_TypeDef SensitivityValue);

void EXTI_SetTLISensitivity(EXTI_TLISensitivity_TypeDef SensitivityValue);

EXTI_Sensitivity_TypeDef EXTI_GetExtIntSensitivity(EXTI_Port_TypeDef Port);

EXTI_TLISensitivity_TypeDef EXTI_GetTLISensitivity(void);

#endif


/** @addtogroup STM8S_StdPeriph_Driver
  * @{
  */
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/* Public functions ----------------------------------------------------------*/

/**
  * @addtogroup EXTI_Public_Functions
  * @{
  */

/**
  * @brief  Deinitializes the external interrupt control registers to their default reset value.
  * @param  None
  * @retval None
  */
inline void EXTI_DeInit(void)
{
	EXTI->CR1 = EXTI_CR1_RESET_VALUE;
	EXTI->CR2 = EXTI_CR2_RESET_VALUE;
}

/**
  * @brief  Set the external interrupt sensitivity of the selected port.
  * @warning
  * - The modification of external interrupt sensitivity is only possible when the interrupts are disabled.
  * - The normal behavior is to disable the interrupts before calling this function, and re-enable them after.
  * @param   Port The port number to access.
  * @param   SensitivityValue The external interrupt sensitivity value to set.
  * @retval None
  * @par Required preconditions:
  * Global interrupts must be disabled before calling this function.
  */
inline void EXTI_SetExtIntSensitivity(EXTI_Port_TypeDef Port, EXTI_Sensitivity_TypeDef SensitivityValue)
{
	/* Check function parameters */
	assert_param(IS_EXTI_PORT_OK(Port));
	assert_param(IS_EXTI_SENSITIVITY_OK(SensitivityValue));

	/* Set external interrupt sensitivity */
	switch (Port) {
		case EXTI_PORT_GPIOA:
			EXTI->CR1 &= (uint8_t) (~EXTI_CR1_PAIS);
			EXTI->CR1 |= (uint8_t) (SensitivityValue);
			break;
		case EXTI_PORT_GPIOB:
			EXTI->CR1 &= (uint8_t) (~EXTI_CR1_PBIS);
			EXTI->CR1 |= (uint8_t) ((uint8_t) (SensitivityValue) << 2);
			break;
		case EXTI_PORT_GPIOC:
			EXTI->CR1 &= (uint8_t) (~EXTI_CR1_PCIS);
			EXTI->CR1 |= (uint8_t) ((uint8_t) (SensitivityValue) << 4);
			break;
		case EXTI_PORT_GPIOD:
			EXTI->CR1 &= (uint8_t) (~EXTI_CR1_PDIS);
			EXTI->CR1 |= (uint8_t) ((uint8_t) (SensitivityValue) << 6);
			break;
		case EXTI_PORT_GPIOE:
			EXTI->CR2 &= (uint8_t) (~EXTI_CR2_PEIS);
			EXTI->CR2 |= (uint8_t) (SensitivityValue);
			break;
		default:
			break;
	}
}

/**
  * @brief  Set the TLI interrupt sensitivity.
  * @param   SensitivityValue The TLI interrupt sensitivity value.
  * @retval None
  * @par Required preconditions:
  * Global interrupts must be disabled before calling this function.
  */
inline void EXTI_SetTLISensitivity(EXTI_TLISensitivity_TypeDef SensitivityValue)
{
	/* Check function parameters */
	assert_param(IS_EXTI_TLISENSITIVITY_OK(SensitivityValue));

	/* Set TLI interrupt sensitivity */
	EXTI->CR2 &= (uint8_t) (~EXTI_CR2_TLIS);
	EXTI->CR2 |= (uint8_t) (SensitivityValue);
}

/**
  * @brief  Get the external interrupt sensitivity of the selected port.
  * @param   Port The port number to access.
  * @retval EXTI_Sensitivity_TypeDef The external interrupt sensitivity of the selected port.
  */
inline EXTI_Sensitivity_TypeDef EXTI_GetExtIntSensitivity(EXTI_Port_TypeDef Port)
{
	uint8_t value = 0;

	/* Check function parameters */
	assert_param(IS_EXTI_PORT_OK(Port));

	switch (Port) {
		case EXTI_PORT_GPIOA:
			value = (uint8_t) (EXTI->CR1 & EXTI_CR1_PAIS);
			break;
		case EXTI_PORT_GPIOB:
			value = (uint8_t) ((uint8_t) (EXTI->CR1 & EXTI_CR1_PBIS) >> 2);
			break;
		case EXTI_PORT_GPIOC:
			value = (uint8_t) ((uint8_t) (EXTI->CR1 & EXTI_CR1_PCIS) >> 4);
			break;
		case EXTI_PORT_GPIOD:
			value = (uint8_t) ((uint8_t) (EXTI->CR1 & EXTI_CR1_PDIS) >> 6);
			break;
		case EXTI_PORT_GPIOE:
			value = (uint8_t) (EXTI->CR2 & EXTI_CR2_PEIS);
			break;
		default:
			break;
	}

	return ((EXTI_Sensitivity_TypeDef) value);
}

/**
  * @brief  Get the TLI interrupt sensitivity.
  * @param  None
  * @retval EXTI_TLISensitivity_TypeDef The TLI interrupt sensitivity read.
  */
inline EXTI_TLISensitivity_TypeDef EXTI_GetTLISensitivity(void)
{
	uint8_t value = 0;

	/* Get TLI interrupt sensitivity */
	value = (uint8_t) (EXTI->CR2 & EXTI_CR2_TLIS);

	return ((EXTI_TLISensitivity_TypeDef) value);
}

/**
  * @}
  */

/**
  * @}
  */


/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/


/**
  * @}
  */

#endif /* __STM8S_EXTI_H */


/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/