/**
  ******************************************************************************
  * @file    Audio_playback_and_record/src/main.c 
  * @author  MCD Application Team
  * @version V1.0.0
  * @date    28-October-2011
  * @brief   Main program body
  ******************************************************************************
  * @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 "main.h"
#include "spi_3201.h"
#include <stdlib.h>

 
/* Exported macro ------------------------------------------------------------*/
/* Select 3201: Chip Select pin low */
//#define 3201_CS_LOW()       GPIO_ResetBits(GPIOB, GPIO_Pin_12)
/* Deselect 3201: Chip Select pin high */
//#define 3201_CS_HIGH()      GPIO_SetBits(GPIOB, GPIO_Pin_12) 


/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define ADC3_DR_ADDRESS     ((uint32_t)0x4001224C)



/* Private variables ---------------------------------------------------------*/
 static __IO uint32_t TimingDelay;
 extern uint8_t NbrOfDataToTransfer;
 extern uint8_t NbrOfDataToRead;
 extern __IO uint8_t TxCounter; 
 extern __IO uint16_t RxCounter;
 extern uint8_t RxBuffer[];
 char *command;
 char *command_AT1 = "AT+CGATT?\r\n";
 //char *command_AT2 = "AT+UPSD=0,1,"AIRTELGPRS.COM"\r\n";
 //char command[]="vv, "as" ";
 unsigned char *Buffer;
 unsigned char ab[64];
 unsigned char bc[64];
 unsigned char cd[64];
 unsigned char de[64];
 unsigned char ef[64];
 unsigned char gh[64];
 unsigned char hi[64];
 unsigned char ij[64];
 unsigned char jk[64];
 unsigned int i;
	unsigned char d;
	
__IO uint16_t ADC3ConvertedValue = 0;
__IO uint32_t ADC3ConvertedVoltage = 0;

	
RCC_ClocksTypeDef RCC_Clocks;
__IO uint8_t RepeatState = 0;
__IO uint8_t RepeatState1 = 0;
__IO uint8_t RepeatState2 = 0;
__IO uint8_t RepeatState3 = 0;
__IO uint8_t RepeatState4 = 0;
__IO uint8_t RepeatState5 = 0;
__IO uint8_t RepeatState6 = 0;
__IO uint8_t RepeatState7 = 0;
__IO uint8_t RepeatState8 = 0;
__IO uint8_t RepeatState9 = 0;
__IO uint8_t RepeatState10 = 0;
__IO uint16_t CCR_Val = 16826;
extern __IO uint8_t LED_Toggle;

/* Private function prototypes -----------------------------------------------*/
static void TIM_LED_Config(void);
void RCC_Configuration(void);
void NVIC_Config(void);
void GPIO_Configuration(void);
void ADC3_CH12_DMA_Config(void);
void itoa(int,char *,int);

/* Private functions ---------------------------------------------------------*/

void RCC_Configuration(void)
{
  /* --------------------------- System Clocks Configuration -----------------*/
	
	/* GPIOC clock enable */
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
  /* USART4 clock enable */
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE);

  
	/* GPIOC clock enable */
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
	
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
	
	/* USART5 clock enable */
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART5, ENABLE);

  
	
}

void NVIC_Config(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;

  /* Enable the USARTx Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
	
	GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_UART4);/* UART4_TX */
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_UART4);/* UART4_RX */
	GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_UART5);/* UART4_TX */
  GPIO_PinAFConfig(GPIOD, GPIO_PinSource2, GPIO_AF_UART5);/* UART4_RX */

  /*-------------------------- GPIO Configuration ----------------------------*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

		
	/*-------------------------- GPIO Configuration ----------------------------*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 ;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
	
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 ;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

	}



void USART4_Configuration(void)
{
    USART_InitTypeDef USART_InitStructure;
//	USART_ClockInitTypeDef USART_ClockInitStruct;
  /* USARTx configuration ------------------------------------------------------*/
  /* USARTx configured as follow:
        - BaudRate = 9600 baud
        - Word Length = 8 Bits
        - Two Stop Bit
        - Odd parity
        - Hardware flow control disabled (RTS and CTS signals)
        - Receive and transmit enabled
  */
	USART_InitStructure.USART_BaudRate = 9600;  //115200;
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  USART_InitStructure.USART_StopBits = USART_StopBits_1;
  USART_InitStructure.USART_Parity = USART_Parity_No;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

	USART_Init(UART4,&USART_InitStructure);  //uart

	USART_Cmd(UART4, ENABLE);
}

void USART5_Configuration(void)
{
    USART_InitTypeDef USART_InitStructure;
//	USART_ClockInitTypeDef USART_ClockInitStruct;
  /* USARTx configuration ------------------------------------------------------*/
  /* USARTx configured as follow:
        - BaudRate = 9600 baud
        - Word Length = 8 Bits
        - Two Stop Bit
        - Odd parity
        - Hardware flow control disabled (RTS and CTS signals)
        - Receive and transmit enabled
  */
	USART_InitStructure.USART_BaudRate = 9600;  //115200;
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  USART_InitStructure.USART_StopBits = USART_StopBits_1;
  USART_InitStructure.USART_Parity = USART_Parity_No;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

	USART_Init(UART5,&USART_InitStructure);  //uart

	USART_Cmd(UART5, ENABLE);
}


void relay_config(void)
{
	GPIO_InitTypeDef  GPIO_InitStructure;
	/* GPIOD Periph clock enable */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);

  /* Configure PD11 in output pushpull mode */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOD, &GPIO_InitStructure);
}



void SendChar(char ch)
{
	 /* Wait till holding buffer empty */
	while(USART_GetFlagStatus(UART4, USART_FLAG_TXE) == RESET);
	USART_SendData(UART4, (unsigned int) ch);
}

void SendInt(uint16_t num)
{
	while(USART_GetFlagStatus(UART4, USART_FLAG_TXE) == RESET);
	USART_SendData(UART4, (uint16_t) num);	
}

void SendInt2(char num)
{
	while(USART_GetFlagStatus(UART4, USART_FLAG_TXE) == RESET);
	USART_SendData(UART4, (unsigned int) num);	
}

void SendString(char *s)
{
	while(*s)
	{
		while(USART_GetFlagStatus(UART4, USART_FLAG_TXE) == RESET);
		USART_SendData(UART4, (unsigned int) *s++);
	}
}

void SendStringadc(uint32_t *s)
{
	while(*s)
	{
		while(USART_GetFlagStatus(UART4, USART_FLAG_TXE) == RESET);
		USART_SendData(UART4, (unsigned int) *s++);
	}
}

void SendChar5(unsigned char ch)
{
	 /* Wait till holding buffer empty */
	while(USART_GetFlagStatus(UART5, USART_FLAG_TXE) == RESET);
	USART_SendData(UART5, (unsigned int) ch);
}

void SendString5(unsigned char *s)
{
	while(*s)
	{
		while(USART_GetFlagStatus(UART5, USART_FLAG_TXE) == RESET);
		USART_SendData(UART5, (unsigned int) *s++);
	}
}

unsigned int RecvChar(void)
{
	unsigned int aa;
	 /* Wait till holding buffer empty */
	while(USART_GetFlagStatus(UART4, USART_FLAG_RXNE) == RESET);
	aa = (unsigned int) (USART_ReceiveData(UART4) & 0x7F);
	return aa;
}
void RecvString(unsigned char *buffer)
{
  unsigned char data;
 do
  {
		while(USART_GetFlagStatus(UART4, USART_FLAG_RXNE) == RESET);    // Wait for data to be received
    data = (unsigned char) (USART_ReceiveData(UART4) & 0x7F);                         
    *buffer = data;
    buffer++;              // Increment the string pointer
  }
while(data!='K');
*buffer='\0';
}

void RecvStringg(void)
{
  unsigned char data;
	int i=0;
 do
  {
		while(USART_GetFlagStatus(UART4, USART_FLAG_RXNE) == RESET);    // Wait for data to be received
    data = (unsigned char) (USART_ReceiveData(UART4) & 0x7F);                         
    ab[i] = data;
    i++;              // Increment the string pointer
  }
while(data!='K');
}


/**
  * @brief  Delay Function.
  * @param  nCount:specifies the Delay time length.
  * @retval None
  */
void Delay(__IO uint32_t nCount)
{
  while(nCount--)
  {
  }
}
void Response(void)
{
	
	i=0;
	do
		{
		  while(USART_GetFlagStatus(UART4, USART_FLAG_RXNE) == RESET);																																			
			d = (USART_ReceiveData(UART4) & 0x7F);
			ab[i]=d;
			i++;
		}while(d!='K');					
}
void Response1(void)
{
	
	i=0;
	do
		{
		  while(USART_GetFlagStatus(UART4, USART_FLAG_RXNE) == RESET);																																			
			d = (USART_ReceiveData(UART4) & 0x7F);
			bc[i]=d;
			i++;
		}while(d!='K');
					
}
void Response2(void)
{
	
	i=0;
	do
		{
		  while(USART_GetFlagStatus(UART4, USART_FLAG_RXNE) == RESET);																																			
			d = (USART_ReceiveData(UART4) & 0x7F);
			cd[i]=d;
			i++;
		}while(d!='K');
					
}
void ResponseSt(void)
{
	i=0;
	do
		{
		  while(USART_GetFlagStatus(UART4, USART_FLAG_RXNE) == RESET);																																			
			d = (USART_ReceiveData(UART4) & 0x7F);
			ab[i]=d;
			i++;
		}while(ab[1]!='K');
					
}
void Gprs(void)
{
	SendString("AT+UPSDA=0,4\r\n");            //GPRS DEACTIVATE
	Response();
	SendString5(ab);	
	SendString("AT+UPSD=0,1,\"AIRTELGPRS.COM\"\r\n");
	Response();
	SendString5(ab);
	SendString("AT+UPSD=0,7,\"0.0.0.0\"\r\n");
	Response();
	SendString5(ab);;
	SendString("AT+UPSDA=0,3\r\n");            //GPRS ACTIVATE
	Response();
	SendString5(ab);
}
void Http(void)
{
	SendString("AT+UHTTP=0\r\n");                        //RESET
	Response();
	SendString5(ab);
	SendString("AT+UHTTP=0,2,\"marudham\"\r\n");           //USERNAME
	Response();
	SendString5(ab);
	SendString("AT+UHTTP=0,3,\"marudham\"\r\n");           //PASSWORD
	Response();
	SendString5(ab);
	SendString("AT+UHTTP=0,1,\"www.marudham.co.in\"\r\n"); //gate way
	Response();
	SendString5(ab);
	//SendString("AT+UHTTPC=0,1,\"/datacapture.php?imeiid=357464034993805&latitude=13.0218N&longitude=80.2056E&date=23062012&time=092652.000&speed=0.61\",\"get.ffs\"\r\n");
	//Response();
}


/**
  * @brief  Main program.
  * @param  None
  * @retval None


void AdcConfig(void)
{ 
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
	
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
	
	// ADC1 configuration ------------------------------------------------------
  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
  ADC_InitStructure.ADC_ScanConvMode = ENABLE;
  ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfChannel = 1;
  ADC_Init(ADC1, &ADC_InitStructure);

} */

void SpiConfig(void)
{
	
  SPI_InitTypeDef  SPI_InitStructure;
	GPIO_InitTypeDef GPIO_InitStructure;
	
	RCC_APB2PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
	
	/*!< Enable GPIO clocks */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
	
	/*!< SPI pins configuration *************************************************/

  /*!< Connect SPI pins to AF5 */  
  GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_SPI2 );
  GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_SPI2 );
	GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_SPI2 );

  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_DOWN;
	
	/*!< SPI SCK pin configuration */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  /*!< SPI MOSI pin configuration */
  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_15;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  /*!< SPI MISO pin configuration */
  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_14;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
	
	/*!< Configure sFLASH Card CS pin in output pushpull mode ********************/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
	
	/*!< Deselect the FLASH: Chip Select high */
	c3201_CS_HIGH();
	
	/*!< SPI configuration */
  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_4;

  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_InitStructure.SPI_CRCPolynomial = 7;
  SPI_Init(SPI2, &SPI_InitStructure);

  /*!< Enable the sFLASH_SPI  */
  SPI_Cmd(SPI2, ENABLE);
}

/*
char *itoa(int n, char *s, int b) {
	static char digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
	int i=0, sign;
    
	if ((sign = n) < 0)
		n = -n;
	do {
		s[i++] = digits[n % b];
	} while ((n /= b) > 0);
	if (sign < 0)
		s[i++] = '-';
	s[i] = '\0';
	return strrev(s);
}
*/
char * utoa(unsigned int n)
{
  char * res, buf[30]; // long enough for largest number
  unsigned int i, counter = 0;

  if (n == 0)
    buf[counter++] = '0';

  for ( ; n; n /= 10)
    buf[counter++] = "0123456789"[n%10];

  res = malloc(counter);

  for (i = 0; i < counter; ++i)
    res[i] = buf[counter - i - 1];

  return res;
}

int main(void)
{ 
	
	char read;
	char value;
	int num = 123;
	char buf[5];
	
	//SystemCoreClockUpdate();
  /* Initialize LEDS */
	
  STM_EVAL_LEDInit(LED3);
  STM_EVAL_LEDInit(LED4);
  STM_EVAL_LEDInit(LED5);
  STM_EVAL_LEDInit(LED6);
 
  /* Green Led On: start of application */
  STM_EVAL_LEDOn(LED4);
	
       
  /* SysTick end of count event each 10ms */
  RCC_GetClocksFreq(&RCC_Clocks);
  SysTick_Config(RCC_Clocks.HCLK_Frequency / 100);
  
  /* Configure TIM4 Peripheral to manage LEDs lighting */
  //TIM_LED_Config();


	//relay_config();
	NVIC_Config();                                  //***
	RCC_Configuration();                            //***
	GPIO_Configuration();                            //****
	USART4_Configuration();                            //***
	USART5_Configuration();
  /* Enable the uart receive interrupt: this interrupt is generated when the 
      transmit data register is empty */  
  //USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);            //***
	//AdcConfig();
	
	SpiConfig();

 
  

  /* ADC3 configuration *******************************************************/
  /*  - Enable peripheral clocks                                              */
  /*  - DMA2_Stream0 channel2 configuration                                   */
  /*  - Configure ADC Channel12 pin as analog input                           */
  /*  - Configure ADC3 Channel12                                              */
  //ADC3_CH12_DMA_Config();

  /* Start ADC3 Software Conversion */ 
  //ADC_SoftwareStartConv(ADC3);
	
	
	
	
	
	
	value=4;
  while (1)
  {
		
		 
			    STM_EVAL_LEDOn(LED6);
					//Gprs();
					//Http();
					//ADC3ConvertedVoltage = ADC3ConvertedValue *3300/0xFFF;
		SendChar('a'); 
		c3201_CS_LOW();
		SendChar('b');		
		while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);
		read=SPI_I2S_ReceiveData(SPI2);
		SendChar('d');
		c3201_CS_HIGH();
		SendChar('e');
		SendChar(read);
		STM_EVAL_LEDOn(LED5);
		
		
		//atoi ("456");
		//atol (Convert string to long integer)
		//atof (Convert string to double)
		//strtol (Convert string to long integer)
		//SendInt2(value);
		//SendChar('a');  


/*
		SendChar('a');
		ADC3ConvertedVoltage = ADC3ConvertedValue *3300/0xFFF;
		command=utoa(ADC3ConvertedVoltage);
		SendString(command);
		SendChar('b');
*/
		
		
		
		
		
		
	
	
	
		
						
		}	 		
	}
  
/**
  * @brief  ADC3 channel12 with DMA configuration
  * @param  None
  * @retval None
  */
void ADC3_CH12_DMA_Config(void)
{
  ADC_InitTypeDef       ADC_InitStructure;
  ADC_CommonInitTypeDef ADC_CommonInitStructure;
  DMA_InitTypeDef       DMA_InitStructure;
  GPIO_InitTypeDef      GPIO_InitStructure;

  /* Enable ADC3, DMA2 and GPIO clocks ****************************************/
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2 | RCC_AHB1Periph_GPIOC, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC3, ENABLE);

  /* DMA2 Stream0 channel0 configuration **************************************/
  DMA_InitStructure.DMA_Channel = DMA_Channel_2;  
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC3_DR_ADDRESS;
  DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&ADC3ConvertedValue;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
  DMA_InitStructure.DMA_BufferSize = 1;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;         
  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  DMA_Init(DMA2_Stream0, &DMA_InitStructure);
  DMA_Cmd(DMA2_Stream0, ENABLE);

  /* Configure ADC3 Channel12 pin as analog input ******************************/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* ADC Common Init **********************************************************/
  ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
  ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;
  ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
  ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
  ADC_CommonInit(&ADC_CommonInitStructure);

  /* ADC3 Init ****************************************************************/
  ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
  ADC_InitStructure.ADC_ScanConvMode = DISABLE;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfConversion = 1;
  ADC_Init(ADC3, &ADC_InitStructure);

  /* ADC3 regular channel12 configuration *************************************/
  ADC_RegularChannelConfig(ADC3, ADC_Channel_12, 1, ADC_SampleTime_3Cycles);

 /* Enable DMA request after last transfer (Single-ADC mode) */
  ADC_DMARequestAfterLastTransferCmd(ADC3, ENABLE);

  /* Enable ADC3 DMA */
  ADC_DMACmd(ADC3, ENABLE);

  /* Enable ADC3 */
  ADC_Cmd(ADC3, ENABLE);
}



/**
  * @brief  Configures the TIM Peripheral for Led toggling.
  * @param  None
  * @retval None
  */
static void TIM_LED_Config(void)
{
  TIM_OCInitTypeDef  TIM_OCInitStructure;
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  NVIC_InitTypeDef NVIC_InitStructure;
  uint16_t prescalervalue = 0;
  
  /* TIM4 clock enable */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
  
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
  
  /* Enable the TIM3 gloabal Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  /* Initialize Leds mounted on STM324F4-EVAL board */
  STM_EVAL_LEDInit(LED3);
  STM_EVAL_LEDInit(LED4);
  STM_EVAL_LEDInit(LED6);
  
  /* Compute the prescaler value */
  prescalervalue = (uint16_t) ((SystemCoreClock ) / 550000) - 1;
  
  /* Time base configuration */
  TIM_TimeBaseStructure.TIM_Period = 65535;
  TIM_TimeBaseStructure.TIM_Prescaler = prescalervalue;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
  
  /* Enable TIM4 Preload register on ARR */
  TIM_ARRPreloadConfig(TIM4, ENABLE);
  
  /* TIM PWM1 Mode configuration: Channel */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR_Val;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  
  /* Output Compare PWM1 Mode configuration: Channel2 */
  TIM_OC1Init(TIM4, &TIM_OCInitStructure);
  TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Disable);
    
  /* TIM Interrupts enable */
  TIM_ITConfig(TIM4, TIM_IT_CC1 , ENABLE);
  
  /* TIM4 enable counter */
  TIM_Cmd(TIM4, ENABLE);
}

#ifdef  USE_FULL_ASSERT






/**
  * @brief  Reports the name of the source file and the source line number
  *   where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t* file, uint32_t line)
{ 
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif

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