Looking at the schematic for the Butterfly, it's not readily apparent how it
manages to translate levels for outbound data. The docs seem to say it's
supposed to work, but my primitive understanding of electronics matches the
results: non-receipt of transmitted data. It could also be my
Mike Young [EMAIL PROTECTED] wrote:
Looking at the schematic for the Butterfly, it's not readily
apparent how it manages to translate levels for outbound data.
Well, it's a bit tricky, but it can be seen.
The incoming RxD is normally held at negative level by the external
transmitter (i.e.
)
{
while (!(UCSRA (1RXC)));
return UDR;
}
- Original Message -
From: Steve Franks [EMAIL PROTECTED]
To: 'Mike Young' [EMAIL PROTECTED]
Sent: Tuesday, November 29, 2005 5:50 PM
Subject: RE: [avr-gcc-list] Butterfly RS232?
Mike,
I've done it, seems to work fine for me. Hooked up DB9
On Wed, 30 Nov 2005 10:54, Mike Young wrote:
// Set baud rate
UBRRH = (unsigned char)(baudrate8);
UBRRL = (unsigned char)baudrate;
// Enable 2x speed
UCSRA = (1U2X);
// Enable receiver
UCSRB = (1RXEN)|(0TXEN)|(0RXCIE)|(0UDRIE);
This line turns the
