USART错误的数据

我正在调试正在度假的同事的STM8软件，我面临一个我无法立即解决的问题......（我是模拟工程师，所以软件不是我的一杯茶）
该器件具有USART接口（250kBaud）。 99％的接收数据是正确的，但有时会跳过数据槽。 Usualy（总是???）跳过的插槽是

休息后的前几个。发射器的中断是3,4ms，MAB是108μs，只发送32个插槽。当我使用另一台15毫秒的发射器时，136μs的MAB和

512个数据插槽，接收器完美无瑕。我已将代码简化为基本功能，如下图所示，但问题仍然存在......
INTERRUPT_HANDLER（UART2_RX_IRQHandler，21）

{

RxBuffer [RxPos] = UART2_ReceiveData8（）;
if（UART2_GetFlagStatus（UART2_FLAG_FE））
{
Data_1 = RxBuffer [DMX_Structure.start_address];
Data_2 = RxBuffer [DMX_Structure.start_address + 1];
Data_3 = RxBuffer [DMX_Structure.start_address + 2];
Data_4 = RxBuffer [DMX_Structure.start_address + 3];
Data_5 = RxBuffer [DMX_Structure.start_address + 4]; RxPos = 0;

UART2_ClearFlag（UART2_FLAG_FE）; //清除UART的帧错误标志
}

如果（RxPos＆LT; 513）
RxPos ++; UART2_ClearFlag（UART2_FLAG_RXNE）;

}


什么可能出错的想法？​​问候。



以下为原文





I'm currently debugging STM8 software of a colleague who is on holiday and i face a problem which i cannot immediatly solve...  (I’m an analog engineer, so software is not really my cup of tea)
The device has a USART interface (at 250kBaud). 99% of the received data is correct, but sometimes dataslots are skipped. Usualy (allways???) skipped slots are

the first few after the break.The break of the transmitter is 3,4ms and the MAB is 108µs, only 32 slots are sent. When i use another transmitter with 15ms break, 136µs MAB and

512 data slots, the receiver works flawless.I have simplified the code to the basic functionality as shown below, but the problem remains...
  INTERRUPT_HANDLER(UART2_RX_IRQHandler, 21)

   {
     
   RxBuffer[RxPos] = UART2_ReceiveData8();
   if(UART2_GetFlagStatus(UART2_FLAG_FE) )
   {
    Data_1 = RxBuffer[DMX_Structure.start_address];
    Data_2 = RxBuffer[DMX_Structure.start_address + 1];
    Data_3 = RxBuffer[DMX_Structure.start_address + 2];
    Data_4 = RxBuffer[DMX_Structure.start_address + 3];
    Data_5 = RxBuffer[DMX_Structure.start_address + 4];   RxPos = 0;  

    UART2_ClearFlag (UART2_FLAG_FE); // Clear frame error flag of UART
   }
   
   if(RxPos<513)
    RxPos++;            UART2_ClearFlag(UART2_FLAG_RXNE);

   }


   Any ideas what might go wrong?Regards.