stm32f10x103ZE查询法串口通信 那位高手给小弟我看一上这段代码有什么有关问题，为什么串口调试没反应

stm32f10x103ZE查询法串口通信 那位高手给我看一下这段代码有什么问题，为什么串口调试没反应
#include"stm32f10x_lib.h"
void RCC_Configuration(void);
void GPIO_Configuration(void);
void USART_Configuration(void);
void Delay(vu32 nCount)
{
  for(; nCount != 0; nCount--);
}


int main(void)
{
  vu16 i=0;
  RCC_Configuration();
  GPIO_Configuration();
  USART_Configuration();
  GPIO_ResetBits(GPIOF,GPIO_Pin_9);
  while(1)
  {
if(USART_GetFlagStatus(USART1,USART_FLAG_RXNE)==SET)
{
USART_SendData(USART1,USART_ReceiveData(USART1));//pc发送字符然后pc接收
for(i=0;i<500;i++);
}
  }
}
void RCC_Configuration(void)
{
  ErrorStatus HSEStarUpStatus;
  RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON);
HSEStarUpStatus =RCC_WaitForHSEStartUp();
if(HSEStarUpStatus==SUCCESS)
{
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div2);
FLASH_SetLatency(FLASH_Latency_2);
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_9);
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY)==RESET);
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08);
}
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOF,ENABLE);
}
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
  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);
  }
void USART_Configuration(void)
{
  USART_InitTypeDef USART_InitStructure;
  USART_ClockInitTypeDef USART_ClockInitStructure;

  USART_InitStructure.USART_BaudRate=9600;
  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_ClockInitStructure.USART_Clock = USART_Clock_Disable; 
  USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low; 
  USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge; 
  USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
  USART_ClockInit(USART1, &USART_ClockInitStructure); 

  USART_Cmd(USART1,ENABLE);
  }


[解决办法]
这样写，应该没什么问题：

if(USART_GetFlagStatus(USART1,USART_IT_RXNE)==SET)
{
i = USART_ReceiveData(USART1);
USART_SendData(USART1, number); 
while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == SET);
}
[解决办法]
这样写，应该没什么问题：
unsigned int i;
if(USART_GetFlagStatus(USART1,USART_IT_RXNE)==SET)
{
i = USART_ReceiveData(USART1);
USART_SendData(USART1, i);
while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == SET); 
}