stm32串口通讯问题

只看该作者 · 2013-5-31 21:45

#include "stm32f10x.h"

u16 sheng[]={1,2,3,4,5,6,7,8,9};
int i=0;

void GPIO_Configuration()
   {
         GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AIN;//设置管脚模式为模拟输入

GPIO_Init(GPIOC,&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
          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_10;
          GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
          GPIO_Init(GPIOA, &GPIO_InitStructure);
   }

void RCC_Configuration()
   {

   RCC_APB2PeriphClockCmd( RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOC|RCC_APB2Periph_USART1,ENABLE);//使能时钟

   }

void USART_Configuration()
{
   USART_InitTypeDef USART_InitStructure;
   USART_InitStructure.USART_BaudRate=115200;//设置波特率
   USART_InitStructure.USART_WordLength=USART_WordLength_8b;//设置数据位长度
   USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
   USART_InitStructure.USART_Mode=USART_Mode_Rx|USART_Mode_Tx;
   USART_InitStructure.USART_Parity=USART_Parity_No;
   USART_InitStructure.USART_StopBits=USART_StopBits_1;
   USART_Init( USART1, &USART_InitStructure);

}
int main()
{

   RCC_Configuration();
   GPIO_Configuration();
   USART_Configuration();
   USART_Cmd( USART1, ENABLE);
   USART_ClearFlag(USART1,USART_FLAG_TC);
   delay(10);
   while(i<9)
   {
   while(USART_GetFlagStatus(USART1, USART_FLAG_TC)==RESET);
  USART_ClearFlag(USART1,USART_IT_TC);
      USART_SendData(USART1,sheng[i]);
   i++;
      }
   }

这个程序运行后PC机上串口小助手不显示接收数据但奇怪的是只要把while（i<9）改成while（1）就接收数据，希望大神们能帮忙看看问题出在哪里