From: mutazilah@nospicedham.gmail.com   
      
   On Saturday, April 15, 2023 at 5:36:19 PM UTC+8, Paul Edwards wrote:   
      
   > > uartEnableTBE(&uart);   
      
   So far I have confirmed that after I have issued this   
   (but without installing my own interrupt handler),   
   I can read the uart to find out what interrupts are   
   available and I see that TBE is the only one.   
      
   I think transmit a byte, and I do get an interrupt,   
   so I do get an additional interrupt even though   
   I've read all the previous ones.   
      
   Then when I go through for the second time, enabling   
   TBE does the same thing, and I read the same thing   
   from the uart.   
      
   But this time when I try to transmit a byte I either don't   
   get an interrupt or I get a hang for some other reason.   
      
   So I don't know what is going on.   
      
   If I can get consistent behavior I can have a simple design.   
      
   BFN. Paul.   
      
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