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Job Summary:
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| Job Type: |
Project |
| Budget: |
$ 100-300 |
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(None) |
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| Status: |
Closed for bidding
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Buyer Summary:
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Rating: (No Feedback Yet)
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| Award Reliability: |
2 posted 0 paid |
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| Location: |
Stillwater, OK, United States
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| Member Since: |
August 24, 2008 |
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Description
I need a PIC16F628A program written in C (CCS or Hitech-C) that would translate (encode) three GPS sentences ($GPRMC,$GPRMB,$GPZDA) into DTMF tones so it can be sent over a radio or telephone and be able to decode back into GPS sentences so it can be fed back to a PC on the other side. The program must have a selection switch so one can choose the program mode (Encoder or Decoder). The speed of DTMF translation and update must be at least once per 2 seconds or faster (once per second if possible). On the encoder side, the program must wait for 4 digit DTMF security code BEFORE the DTMF translation (encoder) can begin. While waiting for the security code, the program will generate shot "beep" sound (then can be a single digit DTMF tone every half second) to indicate to the user that the program is waiting for security code. If the user input a correct security code, the program start translating the GPS sentences into DTMF tone right away. If a wrong security code was enter, a longer tone will sound indicating wrong security code.
I’m going to give you a freedom of circuit design. This mean you can either use a PIC to do DTMF encoder/decoder (all in software) or you can use a DTMF chip such as MT8870, SSI-202 or any other easy to find in the market to do the DTMF encoding/decoding part. You can choose any pin number on the PIC for input and output as long as you feel appropriate for example, you can choose pin RB1 to be GPS in put, RA1 to be sound input for security code and RA0 to be the DTMF tone output. Once again, this is just an example. You can use any pin you want.
If the program has become too large, I would allow using PIC18F4550 instead. However, I would really prefer using PIC16 series and not the 18 series.
Should you have any other questions about this project, please leave me a message on this site, I will get back to you right away. I need this code in 15 days. If you have skill and know exactly what you are doing, this could be your 3-5 days job.
Reminder
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Lahore,
PK
location |
US$100
bid amount
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(No Feedback
Yet)
feedback |
15 day(s)
delivery time |
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We have already talked about this. And our offer still stands.
Sadiq
Bid Time: 08-25-2008 03:01
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