Re: [avr-chat] Problems sending byte to ATmega128 via USART0 when MCU is streaming bytes out.

[Hugo González Monteverde]

Rick Mann wrote:
> The problem I'm running into is this. If the mega128 sends data at  rate 
> of 7 bytes every 1/200th of a second, at 76800 baud, and I  attempt to 
> send a single byte from the PowerBook to the BT module,  that byte never 
> seems to show up. I'm watching on the 'scope to make  sure RTS/CTS stay 
> asserted, and also looking for traffic on TX and  RX. I can see the 
> traffic being sent to the PowerBook, but that byte  from the PowerBook 
> to the BT module's MCU output never shows up.

Tho things come to mind: the char device is buffered as it is UNIX. What 
are you using to send that byte? What program? Can you force a flush of 
the buffer?

What about clock rate? Isn't the error rate in the AVR UART too high?

Hugo