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???
07/23/09 12:55
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 		 #167744 - On or the other - not both
Responding to: ???'s previous message
Rahul Batra said:
gps transmits the data using TTL and RS 232 levels

No, it doesn't.

Any given interface can only work on one set of levels at a time: it must be either "TTL" or RS232 - it cannot be both at once!

and as far as i have studied serial communication also uses both... TTL and RS 232.

Again, any given interface can only be either one or the other - it cannot be both at once!

but if it doesnt do such thing....

No, it doesn't - see above!

than please tell me what should i do to rectify this problem....
well i dont want to destroy anything.....

That was Per's point: if you use a connector that looks like an RTS-232 port for your TTL-level signals then, one day, someone (possibly you in a moment of weakness and/or forgetfulness) will connect RS232 signals to it - and that most probably will destroy your TTL!


List of 24 messages in thread
TopicAuthorDate
interfacing GPS 15L with 8051 microcontroller            01/01/70 00:00      
   Time to start working            01/01/70 00:00      
   Oh the poor boy is waiting            01/01/70 00:00      
   How to proceed            01/01/70 00:00      
   more info's            01/01/70 00:00      
      USB host/device            01/01/70 00:00      
         You don't mind if I tear my hair out for a bit do you            01/01/70 00:00      
            I thought you *shave* your legs, Jez... ;-)            01/01/70 00:00      
               Not shave...            01/01/70 00:00      
                  No problem helping people - just not turn-key solutions            01/01/70 00:00      
            He seems to have given up and gone away anyhow!            01/01/70 00:00      
   i havent run away            01/01/70 00:00      
      System Design            01/01/70 00:00      
         thats not all            01/01/70 00:00      
            take up the data from the GPS and run            01/01/70 00:00      
               Please tell again exactly what you expect your robot to do            01/01/70 00:00      
               its just about the confusion            01/01/70 00:00      
                  Dangerous            01/01/70 00:00      
                     this doesnt sound good            01/01/70 00:00      
                        I might have misunderstod            01/01/70 00:00      
                           what should be done than??            01/01/70 00:00      
                              impossible            01/01/70 00:00      
                              On or the other - not both            01/01/70 00:00      
   Some handy Software for GPS data...            01/01/70 00:00      

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