I watched a lot of sample code on the Internet, but I discovered via a serial port to send data will try again and again to send, is that I interrupt to write wrong, I also try to remove marks, but also not line, the following is part of the code, a great god, please guide,

 
Uint8_t uint8_t void USART1_SendData4 (uint8_t data1, data2, data3, respectively, uint8_t data4) 
{
USART1_SendByte (data1); 
USART1_SendByte (data2); 
USART1_SendByte (data3); 
USART1_SendByte (data4); 
USART_ClearFlag (USART1, USART_FLAG_TC); 
} 

 
Void USART1_SendByte (uint8_t data) 
{
USART_SendData (USART1, data); 
While (USART_GetFlagStatus (USART1, USART_FLAG_TXE)==RESET); 
} 

 
Void USART1_IRQHandler () 
{
If (USART_GetITStatus (USART1, USART_IT_RXNE)) 
{
USART_ClearFlag (USART1, USART_FLAG_ORE);//clean up spilled interrupt 
} 
}