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???
02/06/05 07:06
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#86641 - code for sending a character
Responding to: ???'s previous message
Hi,
org 0
baudnum equ 0f3h
anl pcon,#7fh
anl tmod,#30h
orl tmod,#20h
mov th1,#baudnum
setb tr1
mov scon,#40h
xmit:
MOV sbuf,#"M"
wait:
JBC ti,xmit
SJMP wait
end

Here a baud rate of 2404 is used.This should transmit 'M' cntinuosuly to the pc.You can see this in hper terminal of windows.I tested it .It works perfectly.
Use loop back handshaking.I have given details of connection in this forum.Check it.With max232 16 pin ic this works.

List of 17 messages in thread
TopicAuthorDate
need help on serial communication            01/01/70 00:00      
   Your setup            01/01/70 00:00      
      simulator testing            01/01/70 00:00      
   read eall about it            01/01/70 00:00      
   Hardware            01/01/70 00:00      
      Why the MAX232            01/01/70 00:00      
         Yes :) you right Steve.            01/01/70 00:00      
      Handshaking?            01/01/70 00:00      
   One step at a time            01/01/70 00:00      
   setup correct?            01/01/70 00:00      
      connector pinouts            01/01/70 00:00      
         Schematic            01/01/70 00:00      
   help again sorry            01/01/70 00:00      
      easy            01/01/70 00:00      
         Exclude trivial problems            01/01/70 00:00      
   code for sending a character            01/01/70 00:00      
   loop back handshaking            01/01/70 00:00      

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