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???
07/17/08 04:33
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#156784 - SCON code question - data not seen
Here is my code.
9600 baud / 8/n/1

No receive required, just send. I have tried hyperterminal and a Epson printer configured correctly, AND am using a null modem cable. I can see the serial data sent on my scope but neither the printer or the hyperterminal will recognixe the data and display it.

11.059 Xtal on AT89C4051 CPU chip.

what am I doing wrong?
;

SNDWNOW:MOV SCON,#01000000B
MOV TH1,#0FDH
MOV TMOD,#00100000B
CLR RI ;NO RX COMM
SETB TR1 ;TURN ON BAUD RATE TIMER
;
MOV SBUF,#2AH ;SEND "*"
CALL TSWAIT
MOV SBUF,#57H ;SEND "W"
CALL TSWAIT
MOV SBUF,44H ;SEND MSD OF DATA
CALL TSWAIT
MOV SBUF,43H ;SEND LSD OF data
CALL TSWAIT
MOV SBUF,#0DH ;SEND "CR"
CALL TSWAIT
MOV SBUF,#0AH ;SEND "LF"
CALL TSWAIT
RET
;
;
TSWAIT: JNB TI,TSWAIT
CLR TI
RET
;
;


List of 32 messages in thread
TopicAuthorDate
SCON code question - data not seen            01/01/70 00:00      
   do you use a proper level convertor?            01/01/70 00:00      
      new cable            01/01/70 00:00      
   two different lever convertors            01/01/70 00:00      
   Check pins on cable            01/01/70 00:00      
      the cable appears to be correct            01/01/70 00:00      
   is data correct on the scope?            01/01/70 00:00      
      analog -vs- DSO            01/01/70 00:00      
         Triangular??            01/01/70 00:00      
         analog scope            01/01/70 00:00      
            oops - use 0x55            01/01/70 00:00      
   check Flow Control            01/01/70 00:00      
   Basics            01/01/70 00:00      
      Thanks Jon            01/01/70 00:00      
   Program works            01/01/70 00:00      
      feed through that wasn't            01/01/70 00:00      
         Correct spelling            01/01/70 00:00      
            just for the numbers or all characters?            01/01/70 00:00      
               In your case, to all            01/01/70 00:00      
                  fixed and not fixed            01/01/70 00:00      
                     not in that code            01/01/70 00:00      
   read mov data, data instruction            01/01/70 00:00      
      biblical            01/01/70 00:00      
         mov direct, direct instruction            01/01/70 00:00      
            to solve this            01/01/70 00:00      
            We talk of mnemonics            01/01/70 00:00      
               what matters is inside mcu            01/01/70 00:00      
                  The manufacturer defines            01/01/70 00:00      
                     Motorola versus Intel            01/01/70 00:00      
                  amateurs might hve some such, but no ..            01/01/70 00:00      
                     the assembler I use            01/01/70 00:00      
            no, it will not            01/01/70 00:00      

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