STM8L051F3串口调试不通的原因？

最近刚刚接触stm8，在使用串口的时候，死活的调试不通，请教万能的大神们
串口配置
void Uart1_Init(void)
{
          CLK_PeripheralClockConfig(CLK_Peripheral_USART1, ENABLE);
        GPIO_Init(GPIOC, GPIO_Pin_3, GPIO_Mode_Out_PP_High_Fast);//TXD
          GPIO_Init(GPIOC, GPIO_Pin_2, GPIO_Mode_In_PU_No_IT);//RXD
           GPIO_ExternalPullUpConfig(GPIOC, GPIO_Pin_2, ENABLE);
                  GPIO_ExternalPullUpConfig(GPIOC, GPIO_Pin_3, ENABLE);
          USART_DeInit(USART1);                //复位UART1
        /*
         * 将UART1配置为：
         * 波特率 = 115200
         * 数据位 = 8
         * 1位停止位
         * 无校验位
         * 使能接收和发送
         */
         
        USART_Init(USART1, (u32)9600, USART_WordLength_8b, USART_StopBits_1,
                                USART_Parity_No, USART_Mode_Tx|USART_Mode_Rx);
        USART_ClearITPendingBit(USART1, USART_IT_RXNE);
        USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启接收中断
        USART_ITConfig(USART1, USART_IT_TC, ENABLE);//开启接收中断
        USART_Cmd(USART1, ENABLE);        //使能UART2
}


main（）
{
                CLK_HSICmd(ENABLE);
                CLK_SYSCLKSourceConfig(CLK_SYSCLKSource_HSI);
                while(CLK_GetFlagStatus(CLK_FLAG_HSIRDY) == RESET);
                  CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1);

Uart1_Init();

while(1)
{
Delay_ms(20);
USART_SendData8(USART1, 0xfb);//在进入这个函数时经常提示 参数无效，而且数据寄存器中一直都是0x00，而且直接给该寄存器写值也写不进去
while(SART_GetFlagStatus( USART1, USART_FLAG_TC) == RESET);

}
        

}
代码就这么点，但就是没有数据，而且直接给USART1-DR赋值也没用，

[/td]
以下内容为评论
[td]顶一下 [/td]

[td]/* Includes ------------------------------------------------------------------*/
#include "stm8l15x.h"
#include "stdio.h"

/** @addtogroup STM8L15x_StdPeriph_Examples
  * @{
  */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* define the GPIO port and pins connected to Leds mounted on STM8L152X-EVAL board */

#define LED_GPIO_PORT  GPIOB
#define LED_GPIO_PINS  GPIO_Pin_7

#define KEY_GPIO_PORT  GPIOD
#define KEY_GPIO_PINS  GPIO_Pin_2

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
void Delay (uint16_t nCount);

#ifdef _RAISONANCE_
#define PUTCHAR_PROTOTYPE int putchar (char c)
#define GETCHAR_PROTOTYPE int getchar (void)
#elif defined (_COSMIC_)
#define PUTCHAR_PROTOTYPE char putchar (char c)
#define GETCHAR_PROTOTYPE char getchar (void)
#else /* _IAR_ */
#define PUTCHAR_PROTOTYPE int putchar (int c)
#define GETCHAR_PROTOTYPE int getchar (void)
#endif /* _RAISONANCE_ */

/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Main program.
  * @param  None
  * @retval None
  */
void main(void)
{
  uint8_t ans;
  
  /* Config system clock as: HSI @ 16MHz  */
  CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1);
  
  /* Initialize LEDs mounted on STM8L152X-EVAL board */
  GPIO_Init(LED_GPIO_PORT, LED_GPIO_PINS, GPIO_Mode_Out_PP_High_Fast);
  
   /* Initialize KEYs mounted on STM8L152X-EVAL board */
  GPIO_Init(KEY_GPIO_PORT, KEY_GPIO_PINS, GPIO_Mode_In_PU_No_IT);

  /* USART configured as follow:
        - BaudRate = 115200 baud
        - Word Length = 8 Bits
        - One Stop Bit
        - No parity
        - Receive and transmit enabled
        - USART Clock enabled
  */
  /* Enable USART clock */
  CLK_PeripheralClockConfig(CLK_Peripheral_USART1, ENABLE);
  
  /* USART configuration */
  USART_Init(USART1, (uint32_t)115200, USART_WordLength_8b, USART_StopBits_1,
                USART_Parity_No, (USART_Mode_TypeDef)(USART_Mode_Tx | USART_Mode_Rx));

  /* Output a message on Hyperterminal using printf function */
  printf("nrUSART Example: retarget the C library printf() and getchar() functions to the USARTnr");
  printf("nrEnter Text: nr");
  
  while (1)
  {
    ans = getchar();
    printf("%c", ans);
  }
}

/**
  * @brief  Inserts a delay time.
  * @param  nCount: specifies the delay time length.
  * @retval None
  */
void Delay(__IO uint16_t nCount)
{
  /* Decrement nCount value */
  while (nCount != 0)
  {
    nCount--;
  }
}
/**
  * @brief Retargets the C library printf function to the USART.
  * @param[in] c Character to send
  * @retval char Character sent
  * @par Required preconditions:
  * - None
  */
PUTCHAR_PROTOTYPE
{
  /* Write a character to the USART */
  USART_SendData8(USART1, c);
  /* Loop until the end of transmission */
  while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);

  return (c);
}
/**
  * @brief Retargets the C library scanf function to the USART.
  * @param[in] None
  * @retval char Character to Read
  * @par Required preconditions:
  * - None
  */
GETCHAR_PROTOTYPE
{
  int c = 0;
  /* Loop until the Read data register flag is SET */
  while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
    c = USART_ReceiveData8(USART1);
    return (c);
  }

#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 %drn", file, line) */
  /* Infinite loop */
  while (1)
  {}
}
#endif


/******************************************************/