From: "Anton Erasmus" <[EMAIL PROTECTED]>
[...]
> I tried to calculate the baud rate on scope, I found I
> can't get a exactly number, I can only get an
> estimate. Do you know if there's way to set the baud
> rate accurately?
Send 0xAA continiously. That way you get a nice
square wave at the baud rate frequency. If you drop
I thought it was 0x55 (or ASCII 'U') that you wanted, rather than 0xAA.
An idle RS-232 line is in the "Mark" state. Start bit is "Mark" to "Space"
transition. Data bits are then sent LSB first, with "Mark" == 1, "Space" ==
0, so the LSB has to be a '1'. After the last databit (bit 7 is zero, or
"Space"), the stop bit puts the line back into idle ("Mark") for 1 bit time.
This should work for 8N1.
Regards,
-=Dave
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