Sine_logger/stm32_f0_4/lib/stm320518_eval.c

/**
  ******************************************************************************
  * @file    stm320518_eval.c
  * @author  MCD Application Team
  * @version V1.0.0
  * @date    20-April-2012
  * @brief   This file provides set of firmware functions to manage Leds, 
  *          push-button and COM ports.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2012 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.
  *
  ******************************************************************************
  */
  
/* Includes ------------------------------------------------------------------*/
#include "stm320518_eval.h"

/** @addtogroup Utilities
  * @{
  */ 

/** @addtogroup STM32_EVAL
  * @{
  */ 

/** @addtogroup STM320518_EVAL
  * @{
  */   
    
/** @defgroup STM320518_EVAL_LOW_LEVEL 
  * @brief This file provides firmware functions to manage Leds, push-buttons, 
  *        COM ports, SD card on SPI and temperature sensor (LM75) available on 
  *        STM320518-EVAL evaluation board from STMicroelectronics.
  * @{
  */ 

/** @defgroup STM320518_EVAL_LOW_LEVEL_Private_TypesDefinitions
  * @{
  */ 
/**
  * @}
  */ 


/** @defgroup STM320518_EVAL_LOW_LEVEL_Private_Defines
  * @{
  */ 
/**
  * @}
  */ 


/** @defgroup STM320518_EVAL_LOW_LEVEL_Private_Macros
  * @{
  */ 
/**
  * @}
  */ 


/** @defgroup STM320518_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] = {TAMPER_BUTTON_GPIO_PORT, KEY_BUTTON_GPIO_PORT, 
                                      RIGHT_BUTTON_GPIO_PORT, LEFT_BUTTON_GPIO_PORT, 
                                      UP_BUTTON_GPIO_PORT, DOWN_BUTTON_GPIO_PORT, 
                                      SEL_BUTTON_GPIO_PORT}; 

const uint16_t BUTTON_PIN[BUTTONn] = {TAMPER_BUTTON_PIN, KEY_BUTTON_PIN, 
                                      RIGHT_BUTTON_PIN, LEFT_BUTTON_PIN, 
                                      UP_BUTTON_PIN, DOWN_BUTTON_PIN, 
                                      SEL_BUTTON_PIN}; 

const uint32_t BUTTON_CLK[BUTTONn] = {TAMPER_BUTTON_GPIO_CLK, KEY_BUTTON_GPIO_CLK, 
                                      RIGHT_BUTTON_GPIO_CLK, LEFT_BUTTON_GPIO_CLK, 
                                      UP_BUTTON_GPIO_CLK, DOWN_BUTTON_GPIO_CLK, 
                                      SEL_BUTTON_GPIO_CLK};

const uint16_t BUTTON_EXTI_LINE[BUTTONn] = {TAMPER_BUTTON_EXTI_LINE, 
                                            KEY_BUTTON_EXTI_LINE,
                                            RIGHT_BUTTON_EXTI_LINE,
                                            LEFT_BUTTON_EXTI_LINE,
                                            UP_BUTTON_EXTI_LINE,
                                            DOWN_BUTTON_EXTI_LINE,
                                            SEL_BUTTON_EXTI_LINE};

const uint16_t BUTTON_PORT_SOURCE[BUTTONn] = {TAMPER_BUTTON_EXTI_PORT_SOURCE, 
                                              KEY_BUTTON_EXTI_PORT_SOURCE,
                                              RIGHT_BUTTON_EXTI_PORT_SOURCE,
                                              LEFT_BUTTON_EXTI_PORT_SOURCE,
                                              UP_BUTTON_EXTI_PORT_SOURCE,
                                              DOWN_BUTTON_EXTI_PORT_SOURCE,
                                              SEL_BUTTON_EXTI_PORT_SOURCE};
								 
const uint16_t BUTTON_PIN_SOURCE[BUTTONn] = {TAMPER_BUTTON_EXTI_PIN_SOURCE, 
                                             KEY_BUTTON_EXTI_PIN_SOURCE,
                                             RIGHT_BUTTON_EXTI_PIN_SOURCE,
                                             LEFT_BUTTON_EXTI_PIN_SOURCE,
                                             UP_BUTTON_EXTI_PIN_SOURCE,
                                             DOWN_BUTTON_EXTI_PIN_SOURCE,
                                             SEL_BUTTON_EXTI_PIN_SOURCE}; 

const uint16_t BUTTON_IRQn[BUTTONn] = {TAMPER_BUTTON_EXTI_IRQn, KEY_BUTTON_EXTI_IRQn, 
                                       RIGHT_BUTTON_EXTI_IRQn, LEFT_BUTTON_EXTI_IRQn, 
                                       UP_BUTTON_EXTI_IRQn, DOWN_BUTTON_EXTI_IRQn, 
                                       SEL_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};
 
const uint16_t COM_TX_PIN_SOURCE[COMn] = {EVAL_COM1_TX_SOURCE};

const uint16_t COM_RX_PIN_SOURCE[COMn] = {EVAL_COM1_RX_SOURCE};
 
const uint16_t COM_TX_AF[COMn] = {EVAL_COM1_TX_AF};
 
const uint16_t COM_RX_AF[COMn] = {EVAL_COM1_RX_AF};


/**
  * @}
  */ 


/** @defgroup STM320518_EVAL_LOW_LEVEL_Private_FunctionPrototypes
  * @{
  */ 

/**
  * @}
  */ 

/** @defgroup STM320518_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_AHBPeriphClockCmd(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_NOPULL;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIO_PORT[Led], &GPIO_InitStructure);
  GPIO_PORT[Led]->BSRR = GPIO_PIN[Led];
}

/**
  * @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]->BRR = 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]->BSRR = 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_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_AHBPeriphClockCmd(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;
    if ((Button != BUTTON_TAMPER) && (Button != BUTTON_KEY))
    {
      EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
    }
    else
    {
      EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;    
    }
    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_IRQChannelPriority = 0x03;
    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_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)
{
  /* There is no Wakeup button on STM320518-EVAL. */
  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
  * @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_AHBPeriphClockCmd(COM_TX_PORT_CLK[COM] | COM_RX_PORT_CLK[COM], ENABLE);

  /* Enable USART clock */
  RCC_APB2PeriphClockCmd(COM_USART_CLK[COM], ENABLE); 

  /* Connect PXx to USARTx_Tx */
  GPIO_PinAFConfig(COM_TX_PORT[COM], COM_TX_PIN_SOURCE[COM], COM_TX_AF[COM]);

  /* Connect PXx to USARTx_Rx */
  GPIO_PinAFConfig(COM_RX_PORT[COM], COM_RX_PIN_SOURCE[COM], COM_RX_AF[COM]);
  
  /* Configure USART Tx as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = COM_TX_PIN[COM];
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(COM_TX_PORT[COM], &GPIO_InitStructure);
    
  /* Configure USART Rx as alternate function push-pull */
  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 SPI interface.
  * @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_APB2PeriphClockCmd(SD_SPI_CLK, DISABLE); 

  /*!< Configure SD_SPI pins: SCK */
  GPIO_InitStructure.GPIO_Pin = SD_SPI_SCK_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  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 Card and put it into StandBy State (Ready for 
  *         data transfer).
  * @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_AHBPeriphClockCmd(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_APB2PeriphClockCmd(SD_SPI_CLK, ENABLE); 

  /*!< Configure SD_SPI pins: SCK */
  GPIO_InitStructure.GPIO_Pin = SD_SPI_SCK_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
  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_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(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_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(SD_DETECT_GPIO_PORT, &GPIO_InitStructure);

  /* Connect PXx to SD_SPI_SCK */
  GPIO_PinAFConfig(SD_SPI_SCK_GPIO_PORT, SD_SPI_SCK_SOURCE, SD_SPI_SCK_AF);

  /* Connect PXx to SD_SPI_MISO */
  GPIO_PinAFConfig(SD_SPI_MISO_GPIO_PORT, SD_SPI_MISO_SOURCE, SD_SPI_MISO_AF); 

  /* Connect PXx to SD_SPI_MOSI */
  GPIO_PinAFConfig(SD_SPI_MOSI_GPIO_PORT, SD_SPI_MOSI_SOURCE, SD_SPI_MOSI_AF);  
  
  /*!< 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_RxFIFOThresholdConfig(SD_SPI, SPI_RxFIFOThreshold_QF);
  
  SPI_Cmd(SD_SPI, ENABLE); /*!< SD_SPI enable */
}

/**
  * @brief  DeInitializes the LM75_I2C.
  * @param  None
  * @retval None
  */
void LM75_LowLevel_DeInit(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;

  /*!< Disable LM75_I2C */
  I2C_Cmd(LM75_I2C, DISABLE);
  
  /*!< DeInitializes the LM75_I2C */
  I2C_DeInit(LM75_I2C);
  
  /*!< LM75_I2C Periph clock disable */
  RCC_APB1PeriphClockCmd(LM75_I2C_CLK, DISABLE);
    
  /*!< Configure LM75_I2C pins: SCL */
  GPIO_InitStructure.GPIO_Pin = LM75_I2C_SCL_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(LM75_I2C_SCL_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure LM75_I2C pins: SDA */
  GPIO_InitStructure.GPIO_Pin = LM75_I2C_SDA_PIN;
  GPIO_Init(LM75_I2C_SDA_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure LM75_I2C pin: SMBUS ALERT */
  GPIO_InitStructure.GPIO_Pin = LM75_I2C_SMBUSALERT_PIN;
  GPIO_Init(LM75_I2C_SMBUSALERT_GPIO_PORT, &GPIO_InitStructure);
}

/**
  * @brief  Initializes the LM75_I2C..
  * @param  None
  * @retval None
  */
void LM75_LowLevel_Init(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;

  /*!< LM75_I2C Periph clock enable */
  RCC_APB1PeriphClockCmd(LM75_I2C_CLK, ENABLE);
    
  /* Configure the I2C clock source. The clock is derived from the HSI */
  RCC_I2CCLKConfig(RCC_I2C1CLK_HSI);
  
  /*!< LM75_I2C_SCL_GPIO_CLK, LM75_I2C_SDA_GPIO_CLK 
       and LM75_I2C_SMBUSALERT_GPIO_CLK Periph clock enable */
  RCC_AHBPeriphClockCmd(LM75_I2C_SCL_GPIO_CLK | LM75_I2C_SDA_GPIO_CLK |
                        LM75_I2C_SMBUSALERT_GPIO_CLK, ENABLE);
  
  /* Connect PXx to I2C_SCL */
  GPIO_PinAFConfig(LM75_I2C_SCL_GPIO_PORT, LM75_I2C_SCL_SOURCE, LM75_I2C_SCL_AF);

  /* Connect PXx to I2C_SDA */
  GPIO_PinAFConfig(LM75_I2C_SDA_GPIO_PORT, LM75_I2C_SDA_SOURCE, LM75_I2C_SDA_AF); 

  /* Connect PXx to I2C_SMBUSALER */
  GPIO_PinAFConfig(LM75_I2C_SMBUSALERT_GPIO_PORT, LM75_I2C_SMBUSALERT_SOURCE, LM75_I2C_SMBUSALERT_AF);
    
  /*!< Configure LM75_I2C pins: SCL */
  GPIO_InitStructure.GPIO_Pin = LM75_I2C_SCL_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_NOPULL;
  GPIO_Init(LM75_I2C_SCL_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure LM75_I2C pins: SDA */
  GPIO_InitStructure.GPIO_Pin = LM75_I2C_SDA_PIN;
  GPIO_Init(LM75_I2C_SDA_GPIO_PORT, &GPIO_InitStructure);

  /*!< Configure LM75_I2C pin: SMBUS ALERT */
  GPIO_InitStructure.GPIO_Pin = LM75_I2C_SMBUSALERT_PIN;
  GPIO_Init(LM75_I2C_SMBUSALERT_GPIO_PORT, &GPIO_InitStructure);
}

/**
  * @brief  DeInitializes peripherals used by the I2C EEPROM driver.
  * @param  None
  * @retval None
  */
void sEE_LowLevel_DeInit(void)
{
  GPIO_InitTypeDef  GPIO_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;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  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);
}

/**
  * @brief  Initializes peripherals used by the I2C EEPROM driver.
  * @param  None
  * @retval None
  */
void sEE_LowLevel_Init(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;
  
  /* Configure the I2C clock source. The clock is derived from the HSI */
  RCC_I2CCLKConfig(RCC_I2C1CLK_HSI);
    
  /*!< sEE_I2C_SCL_GPIO_CLK and sEE_I2C_SDA_GPIO_CLK Periph clock enable */
  RCC_AHBPeriphClockCmd(sEE_I2C_SCL_GPIO_CLK | sEE_I2C_SDA_GPIO_CLK, ENABLE);
  
  /*!< sEE_I2C Periph clock enable */
  RCC_APB1PeriphClockCmd(sEE_I2C_CLK, ENABLE);
  
  /* Connect PXx to I2C_SCL*/
  GPIO_PinAFConfig(sEE_I2C_SCL_GPIO_PORT, sEE_I2C_SCL_SOURCE, sEE_I2C_SCL_AF);
  
  /* Connect PXx to I2C_SDA*/
  GPIO_PinAFConfig(sEE_I2C_SDA_GPIO_PORT, sEE_I2C_SDA_SOURCE, sEE_I2C_SDA_AF);
  
  /*!< GPIO configuration */  
  /*!< Configure sEE_I2C pins: SCL */
  GPIO_InitStructure.GPIO_Pin = sEE_I2C_SCL_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_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);
}

/**
  * @}
  */ 

/**
  * @}
  */ 

/**
  * @}
  */

/**
  * @}
  */

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