[SOLVED] enternal interrupt configuration for STM32F103VCT6 PROCESSOR

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void USART2_Configuration(void)
{ 
  GPIO_InitTypeDef GPIO_InitStructure;
  USART_InitTypeDef USART_InitStructure; 
 
  RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA ,ENABLE);
  RCC_APB1PeriphClockCmd( RCC_APB1Periph_USART2,ENABLE);
  /*
  *  USART1_TX -> PA2 , USART1_RX ->    PA3
  */                
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;          
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; 
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 
  GPIO_Init(GPIOA, &GPIO_InitStructure);           
 
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;         
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;  
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 
  GPIO_Init(GPIOA, &GPIO_InitStructure);
 
  USART_InitStructure.USART_BaudRate = 38400;
  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(USART2, &USART_InitStructure); 
  USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
  USART_ITConfig(USART2, USART_IT_TXE, ENABLE);
  USART_ClearFlag(USART2,USART_FLAG_TC);
  USART_Cmd(USART2, ENABLE);
}
 
void SendSerialData(unsigned char *CommandData, unsigned int CommandLength )
{
    unsigned int loopCounter = 0;
 
    for (loopCounter=0; loopCounter<CommandLength; loopCounter++)
    {
        USART_SendData(USART2, CommandData[loopCounter]);
//      wait untill data transmission complition 
        while (USART_GetFlagStatus(USART2, USART_FLAG_TC) == RESET)
        {}
 
    }
}
 
void receiveCommandResponce(unsigned int recCount)
{
    unsigned int loopCnt = 0;
 
    memset_local(USARTRecDataBuff, 0x00, 80);
    for (loopCnt=0;loopCnt<recCount; loopCnt++)
    {
//      wait untill data reception starts 
        while (USART_GetFlagStatus(CAMERA_USART_PORT, USART_FLAG_RXNE) == RESET)
        {}
 
        USARTRecDataBuff[loopCnt] = USART_ReceiveData(USART2);
    }
 
}