AVR-Chat

Hai all

I am transmiting a series of 5 data through uart.
How can i Know that the completion of transmission of all the 
data has finished .

TXC

Please read about the three interrupt sources in the USART.  They are
clearly defined.  RXC, UDRE and TXC.


-----------
Larry Barello
www.barello.net


| -----Original Message-----
| From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf
| Of aswinefy2003
| Sent: Monday, October 03, 2005 11:37 PM
| To: AVR-Chat@yahoogroups.com
| Subject: [AVR-Chat] uart txmission
| 
| Hai all
| 
| I am transmiting a series of 5 data through uart.
| How can i Know that the completion of transmission of all the
| data has finished .
| 
| 
| 
| 
| 
| 
| 
| 
| 
| Yahoo! Groups Links
| 
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|

On 4 Oct 2005 at 6:36, aswinefy2003 wrote:

> I am transmiting a series of 5 data through uart.
> How can i Know that the completion of transmission of all the 
> data has finished .
> 

		sbis	UCSRA, UDRE		; UART buffer empty?
 		rjmp	PC-1
 			 
		sbi	UCSRA, TXC		; Prepare TXC
 		out	UDR, data  		; Send the data

		sbrs	UCSRA, TXC		; TX complete?
 		rjmp PC-1

Perhaps the original sender was wondering how to tell if
the BLOCK of data is finished.

If this is the case, you have to design a "protocol". It
might be as simple as "A gap in the transmission lasting at
least one character time denotes the end of the data."
Otherwise, you might want to consider framing characters -
these are unique characters that never occur in the data
and that denote the beginning and end of the block (or
frame).

Jim
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