/**
  ******************************************************************************
  * @file    stm32l1xx_spi.h
  * @author  MCD Application Team
  * @version V1.1.0
  * @date    24-January-2012
  * @brief   This file contains all the functions prototypes for the SPI 
  *          firmware library.
  ******************************************************************************
  * @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.
  *
  * FOR MORE INFORMATION PLEASE READ CAREFULLY THE LICENSE AGREEMENT FILE
  * LOCATED IN THE ROOT DIRECTORY OF THIS FIRMWARE PACKAGE.
  *
  * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
  ******************************************************************************
  */

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __STM32L1xx_SPI_H
#define __STM32L1xx_SPI_H

#ifdef __cplusplus
 extern "C" {
#endif

/* Includes ------------------------------------------------------------------*/
#include "stm32l1xx.h"

/** @addtogroup STM32L1xx_StdPeriph_Driver
  * @{
  */

/** @addtogroup SPI
  * @{
  */ 

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

/** 
  * @brief  SPI Init structure definition  
  */

typedef struct
{
  uint16_t SPI_Direction;           /*!< Specifies the SPI unidirectional or bidirectional data mode.
                                         This parameter can be a value of @ref SPI_data_direction */

  uint16_t SPI_Mode;                /*!< Specifies the SPI operating mode.
                                         This parameter can be a value of @ref SPI_mode */

  uint16_t SPI_DataSize;            /*!< Specifies the SPI data size.
                                         This parameter can be a value of @ref SPI_data_size */

  uint16_t SPI_CPOL;                /*!< Specifies the serial clock steady state.
                                         This parameter can be a value of @ref SPI_Clock_Polarity */

  uint16_t SPI_CPHA;                /*!< Specifies the clock active edge for the bit capture.
                                         This parameter can be a value of @ref SPI_Clock_Phase */

  uint16_t SPI_NSS;                 /*!< Specifies whether the NSS signal is managed by
                                         hardware (NSS pin) or by software using the SSI bit.
                                         This parameter can be a value of @ref SPI_Slave_Select_management */
 
  uint16_t SPI_BaudRatePrescaler;   /*!< Specifies the Baud Rate prescaler value which will be
                                         used to configure the transmit and receive SCK clock.
                                         This parameter can be a value of @ref SPI_BaudRate_Prescaler
                                         @note The communication clock is derived from the master
                                               clock. The slave clock does not need to be set. */

  uint16_t SPI_FirstBit;            /*!< Specifies whether data transfers start from MSB or LSB bit.
                                         This parameter can be a value of @ref SPI_MSB_LSB_transmission */

  uint16_t SPI_CRCPolynomial;       /*!< Specifies the polynomial used for the CRC calculation. */
}SPI_InitTypeDef;

/** 
  * @brief  I2S Init structure definition  
  */

typedef struct
{

  uint16_t I2S_Mode;         /*!< Specifies the I2S operating mode.
                                  This parameter can be a value of @ref SPI_I2S_Mode */

  uint16_t I2S_Standard;     /*!< Specifies the standard used for the I2S communication.
                                  This parameter can be a value of @ref SPI_I2S_Standard */

  uint16_t I2S_DataFormat;   /*!< Specifies the data format for the I2S communication.
                                  This parameter can be a value of @ref SPI_I2S_Data_Format */

  uint16_t I2S_MCLKOutput;   /*!< Specifies whether the I2S MCLK output is enabled or not.
                                  This parameter can be a value of @ref SPI_I2S_MCLK_Output */

  uint32_t I2S_AudioFreq;    /*!< Specifies the frequency selected for the I2S communication.
                                  This parameter can be a value of @ref SPI_I2S_Audio_Frequency */

  uint16_t I2S_CPOL;         /*!< Specifies the idle state of the I2S clock.
                                  This parameter can be a value of @ref SPI_I2S_Clock_Polarity */
}I2S_InitTypeDef;

/* Exported constants --------------------------------------------------------*/

/** @defgroup SPI_Exported_Constants
  * @{
  */

#define IS_SPI_ALL_PERIPH(PERIPH) (((PERIPH) == SPI1) || \
                                   ((PERIPH) == SPI2) || \
                                   ((PERIPH) == SPI3))
#define IS_SPI_23_PERIPH(PERIPH)  (((PERIPH) == SPI2) || \
                                   ((PERIPH) == SPI3))

/** @defgroup SPI_data_direction 
  * @{
  */
  
#define SPI_Direction_2Lines_FullDuplex ((uint16_t)0x0000)
#define SPI_Direction_2Lines_RxOnly     ((uint16_t)0x0400)
#define SPI_Direction_1Line_Rx          ((uint16_t)0x8000)
#define SPI_Direction_1Line_Tx          ((uint16_t)0xC000)
#define IS_SPI_DIRECTION_MODE(MODE) (((MODE) == SPI_Direction_2Lines_FullDuplex) || \
                                     ((MODE) == SPI_Direction_2Lines_RxOnly) || \
                                     ((MODE) == SPI_Direction_1Line_Rx) || \
                                     ((MODE) == SPI_Direction_1Line_Tx))
/**
  * @}
  */

/** @defgroup SPI_mode 
  * @{
  */

#define SPI_Mode_Master                 ((uint16_t)0x0104)
#define SPI_Mode_Slave                  ((uint16_t)0x0000)
#define IS_SPI_MODE(MODE) (((MODE) == SPI_Mode_Master) || \
                           ((MODE) == SPI_Mode_Slave))
/**
  * @}
  */

/** @defgroup SPI_data_size 
  * @{
  */

#define SPI_DataSize_16b                ((uint16_t)0x0800)
#define SPI_DataSize_8b                 ((uint16_t)0x0000)
#define IS_SPI_DATASIZE(DATASIZE) (((DATASIZE) == SPI_DataSize_16b) || \
                                   ((DATASIZE) == SPI_DataSize_8b))
/**
  * @}
  */ 

/** @defgroup SPI_Clock_Polarity 
  * @{
  */

#define SPI_CPOL_Low                    ((uint16_t)0x0000)
#define SPI_CPOL_High                   ((uint16_t)0x0002)
#define IS_SPI_CPOL(CPOL) (((CPOL) == SPI_CPOL_Low) || \
                           ((CPOL) == SPI_CPOL_High))
/**
  * @}
  */

/** @defgroup SPI_Clock_Phase 
  * @{
  */

#define SPI_CPHA_1Edge                  ((uint16_t)0x0000)
#define SPI_CPHA_2Edge                  ((uint16_t)0x0001)
#define IS_SPI_CPHA(CPHA) (((CPHA) == SPI_CPHA_1Edge) || \
                           ((CPHA) == SPI_CPHA_2Edge))
/**
  * @}
  */

/** @defgroup SPI_Slave_Select_management 
  * @{
  */

#define SPI_NSS_Soft                    ((uint16_t)0x0200)
#define SPI_NSS_Hard                    ((uint16_t)0x0000)
#define IS_SPI_NSS(NSS) (((NSS) == SPI_NSS_Soft) || \
                         ((NSS) == SPI_NSS_Hard))
/**
  * @}
  */ 

/** @defgroup SPI_BaudRate_Prescaler 
  * @{
  */

#define SPI_BaudRatePrescaler_2         ((uint16_t)0x0000)
#define SPI_BaudRatePrescaler_4         ((uint16_t)0x0008)
#define SPI_BaudRatePrescaler_8         ((uint16_t)0x0010)
#define SPI_BaudRatePrescaler_16        ((uint16_t)0x0018)
#define SPI_BaudRatePrescaler_32        ((uint16_t)0x0020)
#define SPI_BaudRatePrescaler_64        ((uint16_t)0x0028)
#define SPI_BaudRatePrescaler_128       ((uint16_t)0x0030)
#define SPI_BaudRatePrescaler_256       ((uint16_t)0x0038)
#define IS_SPI_BAUDRATE_PRESCALER(PRESCALER) (((PRESCALER) == SPI_BaudRatePrescaler_2) || \
                                              ((PRESCALER) == SPI_BaudRatePrescaler_4) || \
                                              ((PRESCALER) == SPI_BaudRatePrescaler_8) || \
                                              ((PRESCALER) == SPI_BaudRatePrescaler_16) || \
                                              ((PRESCALER) == SPI_BaudRatePrescaler_32) || \
                                              ((PRESCALER) == SPI_BaudRatePrescaler_64) || \
                                              ((PRESCALER) == SPI_BaudRatePrescaler_128) || \
                                              ((PRESCALER) == SPI_BaudRatePrescaler_256))
/**
  * @}
  */ 

/** @defgroup SPI_MSB_LSB_transmission 
  * @{
  */

#define SPI_FirstBit_MSB                ((uint16_t)0x0000)
#define SPI_FirstBit_LSB                ((uint16_t)0x0080)
#define IS_SPI_FIRST_BIT(BIT) (((BIT) == SPI_FirstBit_MSB) || \
                               ((BIT) == SPI_FirstBit_LSB))
/**
  * @}
  */

/** @defgroup SPI_I2S_Mode 
  * @{
  */

#define I2S_Mode_SlaveTx                ((uint16_t)0x0000)
#define I2S_Mode_SlaveRx                ((uint16_t)0x0100)
#define I2S_Mode_MasterTx               ((uint16_t)0x0200)
#define I2S_Mode_MasterRx               ((uint16_t)0x0300)
#define IS_I2S_MODE(MODE) (((MODE) == I2S_Mode_SlaveTx) || \
                           ((MODE) == I2S_Mode_SlaveRx) || \
                           ((MODE) == I2S_Mode_MasterTx)|| \
                           ((MODE) == I2S_Mode_MasterRx))
/**
  * @}
  */
  

/** @defgroup SPI_I2S_Standard 
  * @{
  */

#define I2S_Standard_Phillips           ((uint16_t)0x0000)
#define I2S_Standard_MSB                ((uint16_t)0x0010)
#define I2S_Standard_LSB                ((uint16_t)0x0020)
#define I2S_Standard_PCMShort           ((uint16_t)0x0030)
#define I2S_Standard_PCMLong            ((uint16_t)0x00B0)
#define IS_I2S_STANDARD(STANDARD) (((STANDARD) == I2S_Standard_Phillips) || \
                                   ((STANDARD) == I2S_Standard_MSB) || \