STM32 串口收发数据

只看该作者 · 2011-3-22 12:00

我尝试用下面的代码发数据，但是一直得到的是00 00。。。。。望好心人指教！！
int main(void)
{
int i, RX_status = 0;

SystemInit();
GPIO_Configuration();
USART1_Config();
while (1)
{

  RX_status = USART_GetFlagStatus(USART1, USART_FLAG_RXNE);
  if(RX_status == SET)
{
   USART_SendData(USART1 , USART_ReceiveData(USART1));
   while(USART_GetFlagStatus(USART1, USART_FLAG_TC)==RESET);
}
}
}

void USART1_Config(void)
{
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 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(USART1, &USART_InitStructure);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_ITConfig(USART1, USART_IT_TXE, ENABLE);
USART_Cmd(USART1, ENABLE);
}

void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_USART1 |RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |
                     RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD |
                     RCC_APB2Periph_GPIOE, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; //LED4
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOE, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);

}