/**
  ******************************************************************************
  * @file    stm32f4_discovery.c
  * @author  MCD Application Team
  * @version V1.1.0
  * @date    28-October-2011
  * @brief   This file provides set of firmware functions to manage Leds and
  *          push-button available on STM32F4-Discovery Kit from STMicroelectronics.
  ******************************************************************************
  * @attention
  *
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  *
  * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
  ******************************************************************************
  */ 
  
/* Includes ------------------------------------------------------------------*/
#include "stm32f4_discovery.h"
#include "stm32f4xx_gpio.h" 
#include "stm32f4xx_exti.h"
#include "stm32f4xx_rcc.h"
#include "stm32f4xx_syscfg.h"
#include "misc.h" 

/** @addtogroup Utilities
  * @{
  */ 

/** @addtogroup STM32F4_DISCOVERY
  * @{
  */   
    
/** @defgroup STM32F4_DISCOVERY_LOW_LEVEL 
  * @brief This file provides set of firmware functions to manage Leds and push-button
  *        available on STM32F4-Discovery Kit from STMicroelectronics.
  * @{
  */ 

/** @defgroup STM32F4_DISCOVERY_LOW_LEVEL_Private_TypesDefinitions
  * @{
  */ 
/**
  * @}
  */ 


/** @defgroup STM32F4_DISCOVERY_LOW_LEVEL_Private_Defines
  * @{
  */ 
/**
  * @}
  */ 


/** @defgroup STM32F4_DISCOVERY_LOW_LEVEL_Private_Macros
  * @{
  */ 
/**
  * @}
  */ 


/** @defgroup STM32F4_DISCOVERY_LOW_LEVEL_Private_Variables
  * @{
  */ 
GPIO_TypeDef* GPIO_PORT[LEDn] = {LED4_GPIO_PORT, LED3_GPIO_PORT, LED5_GPIO_PORT,
                                 LED6_GPIO_PORT};
const uint16_t GPIO_PIN[LEDn] = {LED4_PIN, LED3_PIN, LED5_PIN,
                                 LED6_PIN};
const uint32_t GPIO_CLK[LEDn] = {LED4_GPIO_CLK, LED3_GPIO_CLK, LED5_GPIO_CLK,
                                 LED6_GPIO_CLK};

GPIO_TypeDef* BUTTON_PORT[BUTTONn] = {USER_BUTTON_GPIO_PORT }; 

const uint16_t BUTTON_PIN[BUTTONn] = {USER_BUTTON_PIN }; 

const uint32_t BUTTON_CLK[BUTTONn] = {USER_BUTTON_GPIO_CLK };

const uint16_t BUTTON_EXTI_LINE[BUTTONn] = {USER_BUTTON_EXTI_LINE };

const uint8_t BUTTON_PORT_SOURCE[BUTTONn] = {USER_BUTTON_EXTI_PORT_SOURCE};
								 
const uint8_t BUTTON_PIN_SOURCE[BUTTONn] = {USER_BUTTON_EXTI_PIN_SOURCE }; 
const uint8_t BUTTON_IRQn[BUTTONn] = {USER_BUTTON_EXTI_IRQn };

NVIC_InitTypeDef   NVIC_InitStructure;

/**
  * @}
  */ 


/** @defgroup STM32F4_DISCOVERY_LOW_LEVEL_Private_FunctionPrototypes
  * @{
  */ 

/**
  * @}
  */ 

/** @defgroup STM32F4_DISCOVERY_LOW_LEVEL_Private_Functions
  * @{
  */ 

/**
  * @brief  Configures LED GPIO.
  * @param  Led: Specifies the Led to be configured. 
  *   This parameter can be one of following parameters:
  *     @arg LED4
  *     @arg LED3
  *     @arg LED5
  *     @arg LED6
  * @retval None
  */
void STM_EVAL_LEDInit(Led_TypeDef Led)
{
  GPIO_InitTypeDef  GPIO_InitStructure;
  
  /* Enable the GPIO_LED Clock */
  RCC_AHB1PeriphClockCmd(GPIO_CLK[Led], ENABLE);

  /* Configure the GPIO_LED pin */
  GPIO_InitStructure.GPIO_Pin = GPIO_PIN[Led];
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIO_PORT[Led], &GPIO_InitStructure);
}

/**
  * @brief  Turns selected LED On.
  * @param  Led: Specifies the Led to be set on. 
  *   This parameter can be one of following parameters:
  *     @arg LED4
  *     @arg LED3
  *     @arg LED5
  *     @arg LED6  
  * @retval None
  */
void STM_EVAL_LEDOn(Led_TypeDef Led)
{
  GPIO_PORT[Led]->BSRRL = GPIO_PIN[Led];
}

/**
  * @brief  Turns selected LED Off.
  * @param  Led: Specifies the Led to be set off. 
  *   This parameter can be one of following parameters:
  *     @arg LED4
  *     @arg LED3
  *     @arg LED5
  *     @arg LED6 
  * @retval None
  */
void STM_EVAL_LEDOff(Led_TypeDef Led)
{
  GPIO_PORT[Led]->BSRRH = GPIO_PIN[Led];  
}

/**
  * @brief  Toggles the selected LED.
  * @param  Led: Specifies the Led to be toggled. 
  *   This parameter can be one of following parameters:
  *     @arg LED4
  *     @arg LED3
  *     @arg LED5
  *     @arg LED6  
  * @retval None
  */
void STM_EVAL_LEDToggle(Led_TypeDef Led)
{
  GPIO_PORT[Led]->ODR ^= GPIO_PIN[Led];
}

/**
  * @brief  Configures Button GPIO and EXTI Line.
  * @param  Button: Specifies the Button to be configured.
  *   This parameter should be: BUTTON_USER
  * @param  Button_Mode: Specifies Button mode.
  *   This parameter can be one of following parameters:   
  *     @arg BUTTON_MODE_GPIO: Button will be used as simple IO 
  *     @arg BUTTON_MODE_EXTI: Button will be connected to EXTI line with interrupt
  *                            generation capability  
  * @retval None
  */
void STM_EVAL_PBInit(Button_TypeDef Button, ButtonMode_TypeDef Button_Mode)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  EXTI_InitTypeDef EXTI_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;

  /* Enable the BUTTON Clock */
  RCC_AHB1PeriphClockCmd(BUTTON_CLK[Button], ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);

  /* Configure Button pin as input */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_InitStructure.GPIO_Pin = BUTTON_PIN[Button];
  GPIO_Init(BUTTON_PORT[Button], &GPIO_InitStructure);

  if (Button_Mode == BUTTON_MODE_EXTI)
  {
    /* Connect Button EXTI Line to Button GPIO Pin */
    SYSCFG_EXTILineConfig(BUTTON_PORT_SOURCE[Button], BUTTON_PIN_SOURCE[Button]);

    /* Configure Button EXTI line */
    EXTI_InitStructure.EXTI_Line = BUTTON_EXTI_LINE[Button];
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;  
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);

    /* Enable and set Button EXTI Interrupt to the lowest priority */
    NVIC_InitStructure.NVIC_IRQChannel = BUTTON_IRQn[Button];
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

    NVIC_Init(&NVIC_InitStructure); 
  }
}

/**
  * @brief  Returns the selected Button state.
  * @param  Button: Specifies the Button to be checked.
  *   This parameter should be: BUTTON_USER  
  * @retval The Button GPIO pin value.
  */
uint32_t STM_EVAL_PBGetState(Button_TypeDef Button)
{
  return GPIO_ReadInputDataBit(BUTTON_PORT[Button], BUTTON_PIN[Button]);
}

/**
  * @}
  */ 

/**
  * @}
  */ 

/**
  * @}
  */   

/**
  * @}
  */ 
    
/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
