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???
07/11/10 07:02
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 		 #177232 - Simulating GPS seems to work...
Responding to: ???'s previous message
Sonia Sanghvi said:
Mahmood Elnasser said:
What I suggest for you is to write a small program on PC to send fake NMEA sentences to your 8051...


I did try something similar. I typed in NMEA sentences on the hyperterminal screen and displayed chunks of it on the LCD.

I am really sorry,but I'm not quite aware of how to program the PC to send sentences to the 8051. Can you please guide me to an online tutorial which can tell me about it or any other source which could help me with this


I did try and figure out things by myself first. I had noted down some GPS sentences that I was getting in a Notepad file.
Now i opened the hyperterminal (and configured it at 4800 8n1) and under the "Transfer" tab, selected the "Transfer text file" and selected my notepad document (and started the transfer). Is this procedure right?
Also, if it is right, then the LCD did display the data correctly. (In fact I even ran the data parsing code on it and it worked well too...)

Are we sure that the TTL, RS232 levels mentioned in the datasheet below are nothing to be worried about?
http://www.sparkfun.com/datasheets/GPS/EM-406A_User_Manual.PDF

because this link http://www.8051projects.net/forum-t23966.html seems to have different story to tell...

List of 41 messages in thread
TopicAuthorDate
Problems with GPS Receiver and the 8051            01/01/70 00:00      
   Take a step back.            01/01/70 00:00      
      Always very baudrate by measuring it            01/01/70 00:00      
      Roger that..            01/01/70 00:00      
         Noise ?            01/01/70 00:00      
         RE: Random data            01/01/70 00:00      
            Working on the hyperterminal...            01/01/70 00:00      
               Tx Rx pins            01/01/70 00:00      
                  The connections seem to be fine...            01/01/70 00:00      
                     GPS emulator            01/01/70 00:00      
                        Keil Simulator            01/01/70 00:00      
                           Great idea...            01/01/70 00:00      
                              Simulating GPS seems to work...            01/01/70 00:00      
                                 scope time            01/01/70 00:00      
                     LCD display delay problem?            01/01/70 00:00      
   Sio_poll_0.6.zip            01/01/70 00:00      
      comp.xx not nicest            01/01/70 00:00      
         Thanks Per.            01/01/70 00:00      
            Ask for suggestions how to improve the code            01/01/70 00:00      
               Good advice...            01/01/70 00:00      
      Hyperterminal works            01/01/70 00:00      
         A doubt in the datasheet...            01/01/70 00:00      
            it means that they do not know            01/01/70 00:00      
            Correct            01/01/70 00:00      
            why            01/01/70 00:00      
   Let's Do a Sanity Check            01/01/70 00:00      
      EM406            01/01/70 00:00      
      It is very weird, but...            01/01/70 00:00      
         Then is is time for....            01/01/70 00:00      
            Oscilloscpe.            01/01/70 00:00      
               Verify voltages with scope            01/01/70 00:00      
         re inversion (not) needed)            01/01/70 00:00      
      Use the simulator!            01/01/70 00:00      
         Don't really know...            01/01/70 00:00      
            Using the Keil Debugger/Simulator            01/01/70 00:00      
               Working! Now...            01/01/70 00:00      
                  Expensive solution            01/01/70 00:00      
                     True...            01/01/70 00:00      
                        SD_Card_and_DCFS16.zip            01/01/70 00:00      
                           broken link            01/01/70 00:00      
                     not all "level-converter chips" are special            01/01/70 00:00      

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