/**
  ******************************************************************************
  * @file    stm3210c_eval.c
  * @author  MCD Application Team
  * @version V4.5.0
  * @date    07-March-2011
  * @brief   This file provides
  *            - set of firmware functions to manage Leds, push-button and COM ports
  *            - low level initialization functions for SD card (on SPI) and I2C
  *              serial EEPROM (sEE)
  *          available on STM3210C-EVAL evaluation board 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 "stm3210c_eval.h"
#include "stm32f10x_spi.h"
#include "stm32f10x_i2c.h"
#include "stm32f10x_dma.h"

/** @addtogroup Utilities
  * @{
  */ 

/** @addtogroup STM32_EVAL
  * @{
  */ 

/** @addtogroup STM3210C_EVAL
  * @{
  */ 
      
/** @defgroup STM3210C_EVAL_LOW_LEVEL 
  * @brief This file provides firmware functions to manage Leds, push-buttons, 
  *        COM ports, SD card on SPI and EEPROM (sEE) available on STM3210C-EVAL 
  *        evaluation board from STMicroelectronics.
  * @{
  */ 

/** @defgroup STM3210C_EVAL_LOW_LEVEL_Private_TypesDefinitions
  * @{
  */ 
/**
  * @}
  */ 


/** @defgroup STM3210C_EVAL_LOW_LEVEL_Private_Defines
  * @{
  */ 
/**
  * @}
  */ 


/** @defgroup STM3210C_EVAL_LOW_LEVEL_Private_Macros
  * @{
  */ 
/**
  * @}
  */ 


/** @defgroup STM3210C_EVAL_LOW_LEVEL_Private_Variables
  * @{
  */ 
GPIO_TypeDef* GPIO_PORT[LEDn] = {LED1_GPIO_PORT, LED2_GPIO_PORT, LED3_GPIO_PORT,
                                 LED4_GPIO_PORT};
const uint16_t GPIO_PIN[LEDn] = {LED1_PIN, LED2_PIN, LED3_PIN,
                                 LED4_PIN};
const uint32_t GPIO_CLK[LEDn] = {LED1_GPIO_CLK, LED2_GPIO_CLK, LED3_GPIO_CLK,
                                 LED4_GPIO_CLK};

GPIO_TypeDef* BUTTON_PORT[BUTTONn] = {WAKEUP_BUTTON_GPIO_PORT, TAMPER_BUTTON_GPIO_PORT,
                                      KEY_BUTTON_GPIO_PORT}; 

const uint16_t BUTTON_PIN[BUTTONn] = {WAKEUP_BUTTON_PIN, TAMPER_BUTTON_PIN,
                                      KEY_BUTTON_PIN}; 

const uint32_t BUTTON_CLK[BUTTONn] = {WAKEUP_BUTTON_GPIO_CLK, TAMPER_BUTTON_GPIO_CLK,
                                      KEY_BUTTON_GPIO_CLK};

const uint16_t BUTTON_EXTI_LINE[BUTTONn] = {WAKEUP_BUTTON_EXTI_LINE,
                                            TAMPER_BUTTON_EXTI_LINE, 
                                            KEY_BUTTON_EXTI_LINE};

const uint16_t BUTTON_PORT_SOURCE[BUTTONn] = {WAKEUP_BUTTON_EXTI_PORT_SOURCE,
                                              TAMPER_BUTTON_EXTI_PORT_SOURCE, 
                                              KEY_BUTTON_EXTI_PORT_SOURCE};
								 
const uint16_t BUTTON_PIN_SOURCE[BUTTONn] = {WAKEUP_BUTTON_EXTI_PIN_SOURCE,
                                             TAMPER_BUTTON_EXTI_PIN_SOURCE, 
                                             KEY_BUTTON_EXTI_PIN_SOURCE}; 

const uint16_t BUTTON_IRQn[BUTTONn] = {WAKEUP_BUTTON_EXTI_IRQn, TAMPER_BUTTON_EXTI_IRQn,
                                       KEY_BUTTON_EXTI_IRQn};

USART_TypeDef* COM_USART[COMn] = {EVAL_COM1}; 

GPIO_TypeDef* COM_TX_PORT[COMn] = {EVAL_COM1_TX_GPIO_PORT};

GPIO_TypeDef* COM_RX_PORT[COMn] = {EVAL_COM1_RX_GPIO_PORT};

const uint32_t COM_USART_CLK[COMn] = {EVAL_COM1_CLK};

const uint32_t COM_TX_PORT_CLK[COMn] = {EVAL_COM1_TX_GPIO_CLK};
 
const uint32_t COM_RX_PORT_CLK[COMn] = {EVAL_COM1_RX_GPIO_CLK};

const uint16_t COM_TX_PIN[COMn] = {EVAL_COM1_TX_PIN};

const uint16_t COM_RX_PIN[COMn] = {EVAL_COM1_RX_PIN};
 
DMA_InitTypeDef   sEEDMA_InitStructure; 

/**
  * @}
  */ 


/** @defgroup STM3210C_EVAL_LOW_LEVEL_Private_FunctionPrototypes
  * @{
  */ 
/**
  * @}
  */ 

/** @defgroup STM3210C_EVAL_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 LED1
  *     @arg LED2
  *     @arg LED3
  *     @arg LED4
  * @retval None
  */
void STM_EVAL_LEDInit(Led_TypeDef Led)
{
  GPIO_InitTypeDef  GPIO_InitStructure;
  
  /* Enable the GPIO_LED Clock */
  RCC_APB2PeriphClockCmd(GPIO_CLK[Led], ENABLE);

  /* Configure the GPIO_LED pin */
  GPIO_InitStructure.GPIO_Pin = GPIO_PIN[Led];
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  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 LED1
  *     @arg LED2
  *     @arg LED3
  *     @arg LED4  
  * @retval None
  */
void STM_EVAL_LEDOn(Led_TypeDef Led)
{
  GPIO_PORT[Led]->BSRR = 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 LED1
  *     @arg LED2
  *     @arg LED3
  *     @arg LED4 
  * @retval None
  */
void STM_EVAL_LEDOff(Led_TypeDef Led)
{
  GPIO_PORT[Led]->BRR = 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 LED1
  *     @arg LED2
  *     @arg LED3
  *     @arg LED4  
  * @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 can be one of following parameters:   
  *     @arg BUTTON_WAKEUP: Wakeup Push Button
  *     @arg BUTTON_TAMPER: Tamper Push Button  
  *     @arg BUTTON_KEY: Key Push Button 
  *     @arg BUTTON_RIGHT: Joystick Right Push Button 
  *     @arg BUTTON_LEFT: Joystick Left Push Button 
  *     @arg BUTTON_UP: Joystick Up Push Button 
  *     @arg BUTTON_DOWN: Joystick Down Push Button
  *     @arg BUTTON_SEL: Joystick Sel Push Button
  * @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_APB2PeriphClockCmd(BUTTON_CLK[Button] | RCC_APB2Periph_AFIO, ENABLE);

  /* Configure Button pin as input floating */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  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 */
    GPIO_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;

    if(Button != BUTTON_WAKEUP)
    {
      EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;  
    }
    else
    {
      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 can be one of following parameters:    
  *     @arg BUTTON_WAKEUP: Wakeup Push Button
  *     @arg BUTTON_TAMPER: Tamper Push Button  
  *     @arg BUTTON_KEY: Key Push Button 
  *     @arg BUTTON_RIGHT: Joystick Right Push Button 
  *     @arg BUTTON_LEFT: Joystick Left Push Button 
  *     @arg BUTTON_UP: Joystick Up Push Button 
  *     @arg BUTTON_DOWN: Joystick Down Push Button
  *     @arg BUTTON_SEL: Joystick Sel Push Button    
  * @retval The Button GPIO pin value.
  */
uint32_t STM_EVAL_PBGetState(Button_TypeDef Button)
{
  return GPIO_ReadInputDataBit(BUTTON_PORT[Button], BUTTON_PIN[Button]);
}


/**
  * @brief  Configures COM port.
  * @param  COM: Specifies the COM port to be configured.
  *   This parameter can be one of following parameters:    
  *     @arg COM1
  *     @arg COM2  
  * @param  USART_InitStruct: pointer to a USART_InitTypeDef structure that
  *   contains the configuration information for the specified USART peripheral.
  * @retval None
  */
void STM_EVAL_COMInit(COM_TypeDef COM, USART_InitTypeDef* USART_InitStruct)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* Enable GPIO clock */
  RCC_APB2PeriphClockCmd(COM_TX_PORT_CLK[COM] | COM_RX_PORT_CLK[COM] | RCC_APB2Periph_AFIO, ENABLE);

  if (COM == COM1)
  {
    /* Enable the USART2 Pins Software Remapping */
    GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
    RCC_APB1PeriphClockCmd(COM_USART_CLK[COM], ENABLE);
  }

  /* Configure USART Tx as alternate function push-pull */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Pin = COM_TX_PIN[COM];
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(COM_TX_PORT[COM], &GPIO_InitStructure);

  /* Configure USART Rx as input floating */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_InitStructure.GPIO_Pin = COM_RX_PIN[COM];
  GPIO_Init(COM_RX_PORT[COM], &GPIO_InitStructure);

  /* USART configuration */
  USART_Init(COM_USART[COM], USART_InitStruct);
    
  /* Enable USART */
  USART_Cmd(COM_USART[COM], ENABLE);
}

/**
  * @brief  DeInitializes the SD/SD communication.
  * @param  None
  * @retval None
  */
void SD_LowLevel_DeInit(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;
  
  SPI_Cmd(SD_SPI, DISABLE); /*!< SD_SPI disable */
  SPI_I2S_DeInit(SD_SPI);   /*!< DeInitializes the SD_SPI */
  
  /*!< SD_SPI Periph clock disable */
  RCC_APB1PeriphClockCmd(SD_SPI_CLK, DISABLE);
  /*!< DeRemap SPI3 Pins */
  GPIO_PinRemapConfig(GPIO_Remap_SPI3, DISABLE);  
  
  /*!< Configure SD_SPI pins: SCK */
  GPIO_InitStructure.GPIO_Pin = SD_SPI_SCK_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(SD_SPI_SCK_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure SD_SPI pins: MISO */
  GPIO_InitStructure.GPIO_Pin = SD_SPI_MISO_PIN;
  GPIO_Init(SD_SPI_MISO_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure SD_SPI pins: MOSI */
  GPIO_InitStructure.GPIO_Pin = SD_SPI_MOSI_PIN;
  GPIO_Init(SD_SPI_MOSI_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure SD_SPI_CS_PIN pin: SD Card CS pin */
  GPIO_InitStructure.GPIO_Pin = SD_CS_PIN;
  GPIO_Init(SD_CS_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure SD_SPI_DETECT_PIN pin: SD Card detect pin */
  GPIO_InitStructure.GPIO_Pin = SD_DETECT_PIN;
  GPIO_Init(SD_DETECT_GPIO_PORT, &GPIO_InitStructure);
}

/**
  * @brief  Initializes the SD_SPI and CS pins.
  * @param  None
  * @retval None
  */
void SD_LowLevel_Init(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;
  SPI_InitTypeDef   SPI_InitStructure;

  /*!< SD_SPI_CS_GPIO, SD_SPI_MOSI_GPIO, SD_SPI_MISO_GPIO, SD_SPI_DETECT_GPIO 
       and SD_SPI_SCK_GPIO Periph clock enable */
  RCC_APB2PeriphClockCmd(SD_CS_GPIO_CLK | SD_SPI_MOSI_GPIO_CLK | SD_SPI_MISO_GPIO_CLK |
                         SD_SPI_SCK_GPIO_CLK | SD_DETECT_GPIO_CLK, ENABLE);

  /*!< SD_SPI Periph clock enable */
  RCC_APB1PeriphClockCmd(SD_SPI_CLK, ENABLE);
  /*!< AFIO Periph clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
  /*!< Remap SPI3 Pins */
  GPIO_PinRemapConfig(GPIO_Remap_SPI3,ENABLE);  
  
  /*!< Configure SD_SPI pins: SCK */
  GPIO_InitStructure.GPIO_Pin = SD_SPI_SCK_PIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(SD_SPI_SCK_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure SD_SPI pins: MOSI */
  GPIO_InitStructure.GPIO_Pin = SD_SPI_MOSI_PIN;
  GPIO_Init(SD_SPI_MOSI_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure SD_SPI pins: MISO */
  GPIO_InitStructure.GPIO_Pin = SD_SPI_MISO_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;  
  GPIO_Init(SD_SPI_MISO_GPIO_PORT, &GPIO_InitStructure);
  
  /*!< Configure SD_SPI_CS_PIN pin: SD Card CS pin */
  GPIO_InitStructure.GPIO_Pin = SD_CS_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(SD_CS_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure SD_SPI_DETECT_PIN pin: SD Card detect pin */
  GPIO_InitStructure.GPIO_Pin = SD_DETECT_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(SD_DETECT_GPIO_PORT, &GPIO_InitStructure);

  /*!< SD_SPI Config */
  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
  SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
  SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_InitStructure.SPI_CRCPolynomial = 7;
  SPI_Init(SD_SPI, &SPI_InitStructure);
  
  SPI_Cmd(SD_SPI, ENABLE); /*!< SD_SPI enable */
}

/**
  * @brief  DeInitializes peripherals used by the I2C EEPROM driver.
  * @param  None
  * @retval None
  */
void sEE_LowLevel_DeInit(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure; 
  NVIC_InitTypeDef NVIC_InitStructure;    
   
  /* sEE_I2C Peripheral Disable */
  I2C_Cmd(sEE_I2C, DISABLE);
 
  /* sEE_I2C DeInit */
  I2C_DeInit(sEE_I2C);

  /*!< sEE_I2C Periph clock disable */
  RCC_APB1PeriphClockCmd(sEE_I2C_CLK, DISABLE);
    
  /*!< GPIO configuration */  
  /*!< Configure sEE_I2C pins: SCL */
  GPIO_InitStructure.GPIO_Pin = sEE_I2C_SCL_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(sEE_I2C_SCL_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure sEE_I2C pins: SDA */
  GPIO_InitStructure.GPIO_Pin = sEE_I2C_SDA_PIN;
  GPIO_Init(sEE_I2C_SDA_GPIO_PORT, &GPIO_InitStructure);
  
  /* Configure and enable I2C DMA TX Channel interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = sEE_I2C_DMA_TX_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = sEE_I2C_DMA_PREPRIO;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = sEE_I2C_DMA_SUBPRIO;
  NVIC_InitStructure.NVIC_IRQChannelCmd = DISABLE;
  NVIC_Init(&NVIC_InitStructure);

  /* Configure and enable I2C DMA RX Channel interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = sEE_I2C_DMA_RX_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = sEE_I2C_DMA_PREPRIO;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = sEE_I2C_DMA_SUBPRIO;
  NVIC_Init(&NVIC_InitStructure);   
  
  /* Disable and Deinitialize the DMA channels */
  DMA_Cmd(sEE_I2C_DMA_CHANNEL_TX, DISABLE);
  DMA_Cmd(sEE_I2C_DMA_CHANNEL_RX, DISABLE);
  DMA_DeInit(sEE_I2C_DMA_CHANNEL_TX);
  DMA_DeInit(sEE_I2C_DMA_CHANNEL_RX);
}

/**
  * @brief  Initializes peripherals used by the I2C EEPROM driver.
  * @param  None
  * @retval None
  */
void sEE_LowLevel_Init(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;  
    
  /*!< sEE_I2C_SCL_GPIO_CLK and sEE_I2C_SDA_GPIO_CLK Periph clock enable */
  RCC_APB2PeriphClockCmd(sEE_I2C_SCL_GPIO_CLK | sEE_I2C_SDA_GPIO_CLK, ENABLE);

  /*!< sEE_I2C Periph clock enable */
  RCC_APB1PeriphClockCmd(sEE_I2C_CLK, ENABLE);
    
  /*!< GPIO configuration */  
  /*!< Configure sEE_I2C pins: SCL */
  GPIO_InitStructure.GPIO_Pin = sEE_I2C_SCL_PIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
  GPIO_Init(sEE_I2C_SCL_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure sEE_I2C pins: SDA */
  GPIO_InitStructure.GPIO_Pin = sEE_I2C_SDA_PIN;
  GPIO_Init(sEE_I2C_SDA_GPIO_PORT, &GPIO_InitStructure); 

  /* Configure and enable I2C DMA TX Channel interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = sEE_I2C_DMA_TX_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = sEE_I2C_DMA_PREPRIO;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = sEE_I2C_DMA_SUBPRIO;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  /* Configure and enable I2C DMA RX Channel interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = sEE_I2C_DMA_RX_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = sEE_I2C_DMA_PREPRIO;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = sEE_I2C_DMA_SUBPRIO;
  NVIC_Init(&NVIC_InitStructure);  
  
  /*!< I2C DMA TX and RX channels configuration */
  /* Enable the DMA clock */
  RCC_AHBPeriphClockCmd(sEE_I2C_DMA_CLK, ENABLE);

  /* I2C TX DMA Channel configuration */
  DMA_DeInit(sEE_I2C_DMA_CHANNEL_TX);
  sEEDMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)sEE_I2C_DR_Address;
  sEEDMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)0;   /* This parameter will be configured durig communication */
  sEEDMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;    /* This parameter will be configured durig communication */
  sEEDMA_InitStructure.DMA_BufferSize = 0xFFFF;            /* This parameter will be configured durig communication */
  sEEDMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  sEEDMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  sEEDMA_InitStructure.DMA_PeripheralDataSize = DMA_MemoryDataSize_Byte;
  sEEDMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
  sEEDMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
  sEEDMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
  sEEDMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
  DMA_Init(sEE_I2C_DMA_CHANNEL_TX, &sEEDMA_InitStructure);  
  
  /* I2C RX DMA Channel configuration */
  DMA_DeInit(sEE_I2C_DMA_CHANNEL_RX);
  DMA_Init(sEE_I2C_DMA_CHANNEL_RX, &sEEDMA_InitStructure);  
  
  /* Enable the DMA Channels Interrupts */
  DMA_ITConfig(sEE_I2C_DMA_CHANNEL_TX, DMA_IT_TC, ENABLE);
  DMA_ITConfig(sEE_I2C_DMA_CHANNEL_RX, DMA_IT_TC, ENABLE);    
}


/**
  * @brief  Initializes DMA channel used by the I2C EEPROM driver.
  * @param  None
  * @retval None
  */
void sEE_LowLevel_DMAConfig(uint32_t pBuffer, uint32_t BufferSize, uint32_t Direction)
{ 
  /* Initialize the DMA with the new parameters */
  if (Direction == sEE_DIRECTION_TX)
  {
    /* Configure the DMA Tx Channel with the buffer address and the buffer size */
    sEEDMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)pBuffer;
    sEEDMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;    
    sEEDMA_InitStructure.DMA_BufferSize = (uint32_t)BufferSize;  
    DMA_Init(sEE_I2C_DMA_CHANNEL_TX, &sEEDMA_InitStructure);  
  }
  else
  { 
    /* Configure the DMA Rx Channel with the buffer address and the buffer size */
    sEEDMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)pBuffer;
    sEEDMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
    sEEDMA_InitStructure.DMA_BufferSize = (uint32_t)BufferSize;      
    DMA_Init(sEE_I2C_DMA_CHANNEL_RX, &sEEDMA_InitStructure);    
  }
}

/**
  * @}
  */ 

/**
  * @}
  */ 

/**
  * @}
  */ 

/**
  * @}
  */   

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