The code I use works fine with COSMIC, but when using raisonance I don't get interrupt on UART.
My timer interrupt works fine.

The interrupt is enabled like this:

UART1_ITConfig(UART1_IT_RXNE_OR, ENABLE);

and the interrupt handler (which isn't reached) looks like this:

void UART1_RX_IRQHandler (void) interrupt 18
{
   /* In order to detect unexpected events during development,
       it is recommended to set a breakpoint on the following instruction.
    */
    /* Read one byte from the receive data register */
      uint8 Data;
      while (UART1_GetFlagStatus(UART1_FLAG_RXNE) != RESET)
      {
         Data = UART1_ReceiveData8();
         if (Data == '\n') 
         {
            RxBuffer.DataPresent = COM_STATUS_OK;
         }
         else
            RxBuffer.Buffer[RxBuffer.WritePos++] = Data;
         if (RxBuffer.WritePos == BUFFER_SIZE) RxBuffer.WritePos = 0;
      }
    while (UART1_GetFlagStatus(UART1_FLAG_OR) != RESET)
         Data = UART1_ReceiveData8();
}

I'm using a STM8/128-Eval board.
What can be wrong?