STM32F407 Discovery uart1串口通信

#include "stm32f4_discovery.h"
#include <stdio.h>
 
#define LED1_ON     GPIO_SetBits(GPIOD,GPIO_Pin_12)
#define LED1_OFF	GPIO_ResetBits(GPIOD,GPIO_Pin_12)

#define LED2_ON     GPIO_SetBits(GPIOD,GPIO_Pin_13)
#define LED2_OFF	GPIO_ResetBits(GPIOD,GPIO_Pin_13)

extern uint8_t NbrOfDataToTransfer;
extern uint8_t NbrOfDataToRead;
extern __IO uint8_t TxCounter; 
extern __IO uint16_t RxCounter; 

void NVIC_Config(void);
void GPIO_Configuration(void);
void STM_EVAL_COMInit(void);
void USART_Configuration(int BaudRate);
void LED_Config(void);
void Delay(__IO uint32_t nCount);
 
int main(void)
{
  /* Configure the system clocks */
  NVIC_Config();                /* NVIC Configuration */
 
//GPIO_Configuration();         /* Configure the GPIOs */
  STM_EVAL_COMInit();  
  
  USART_Configuration(115200);        /* Configure the USART1 's mode */
                                /* Enable the EVAL_COM1 Transmit interrupt: this interrupt is generated when the 
                                   EVAL_COM1 transmit data register is empty */  

  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
  
  LED_Config();
  
  while (1)
  {
      Delay(0xfFFFFF); 
      Delay(0xfFFFFF); 
      printf("\n\rUSART Printf Example\n\r");
  }
}


void Delay(__IO uint32_t nCount)
{
  while(nCount--)
  {
  }
}


/*******************************************************************************
* Function Name  : GPIO_Configuration
* Description    : Configures the different GPIO ports.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* Configure USART1 Tx (PA.09) as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  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_100MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
    
  /* Configure USART1 Rx (PA.10) as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
}



/**
  * @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(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* Enable GPIO clock */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
  /* Enable UART clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
 
  /* Connect PXx to USARTx_Tx*/
  GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_USART1);
  /* Connect PXx to USARTx_Rx*/
  GPIO_PinAFConfig(GPIOB, GPIO_PinSource7, GPIO_AF_USART1);

  /* Configure USART Tx as alternate function  */
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  /* Configure USART Rx as alternate function  */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
}




/*******************************************************************************
* Function Name  : USART_Configuration
* Description    : Configures the USART1.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void USART_Configuration(int BaudRate)
{
    USART_InitTypeDef USART_InitStructure;

    USART_InitStructure.USART_BaudRate = BaudRate;
    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(USART1, &USART_InitStructure); /* Configure USART1 basic and asynchronous paramters */
    USART_Cmd(USART1, ENABLE);   /* Enable USART1 */
}



void LED_Config(void)
{
	GPIO_InitTypeDef GPIO_InitStructure;
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD , ENABLE);
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13 ;
  	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  	GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
  	GPIO_Init(GPIOD, &GPIO_InitStructure);
}


void NVIC_Config(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;

  /* Enable the USARTx Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}




#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




/*******************************************************************************
* Function Name  : fputc
* Description    : Retargets the C library printf function to the USART.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
int fputc(int ch, FILE *f)
{
  /* Place your implementation of fputc here */
  /* e.g. write a character to the USART */
  USART_SendData(USART1, (u8) ch);

  /* Loop until the end of transmission */
  while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
  {
  }

  return ch;
}