Sorry for the late reply, didn't have a chance to get back to this until 
now.

Xiaofan wrote:
> I tried to use the simulator but I have yet to learn how to
> use the simulator effectively yet. From the simulator run,
> it seems that you have an overrun error here
> (USART_Status.OVERRUN_ERROR = 1) with the helloworld line.

Bingo.

There's nothing wrong with the library. Remember I mentioned that the Tx/Rx 
lines are connected? Well, what happens is as I transmit the string, it gets 
fed into the Rx pin, and causes buffer overflow. Like I said, I was 
overlooking something very obvious.

My plan is to write a custom putrs replacement, that would either disable 
the receiver while it's transmitting, or read the buffer after it sends 
every character.

Thanks, Xiaofan!

Vitaliy 

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