STM32F4_Disvcovery 之串口调试！

张卫提问时间：2014-7-29 21:56 /

如下是STM32F4调试的串口程序：

#include "usart2.h"


void MyUartInit(void )
{
//NVIC_Config();
STM_EVAL_COMInit();
USART_Configuration(115200);
// USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

}

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);
}

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 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);
}

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;
}
int fgetc(FILE *f)
{

  while (USART_GetFlagStatus(USART2, USART_FLAG_RXNE) == RESET);
  return (int)USART_ReceiveData(USART2);
}

void USART1_IRQHandler(void)
{
char c;
if(USART_GetFlagStatus(USART1,USART_FLAG_RXNE)==SET)
{
   c = USART_ReceiveData(USART1);
   USART_SendData(USART1,c);
   USART_ClearITPendingBit(USART1,USART_IT_RXNE);
// GPIO_ToggleBits(GPIOD,GPIO_Pin_14);
}
}

void Usart_Test(void)
{
int i=0;
for(i=0 ; i