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GPS/SMS tracking system implementation problem


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amarhw

Fri Aug 14 2009, 04:26PM

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Hi
I am trying to do this project using GPS+SMS modules and 8051 (XAG49 ) microcontroller with RIDE simulator using C language.
The idea is :
The SMS module receive a massage then the location send back to that sender .
Therefore I should connect the SMS and GPS module with the MC using UART0 and UART1 in the same time. When the request of location received, the MC should read it and read the coordinates ( which is a long string of data ,therefore, I think that I should store it in the RAM then take only the coordinates from it ) and send it back to the sender.
The problems is :
How I can read from UART0 and UART1 using C language?
How can I save the string of data that the GPS send continuously in the RAM to take the part contain the coordinates ? Or there are other idea to take the useful part from the data string that the GPS send in a continuously.
Thanks in advance .

compaq

Fri Aug 14 2009, 10:03PM

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hy i am doing the same project
u have to first interpret those strings n extract values of latitude and longitude from those strings
and then sms tht
8051 has 1 uart so u have to write one uart ur self
hope u got tht

amarhw

Fri Aug 14 2009, 11:53PM

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Hi
You mean while I am receiving the data from the GPS I should interpret the coordinates ?
can you tell me how I can receive from UART 0 ?
Thanks Compaq

compaq

Sat Aug 15 2009, 02:35AM

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yea exactly i have to recieve gps data from tx rx of the microcontroller at 4800 baud rate and then u have to interpret that data and send it to any other tx of ur controller
and u have toy write one of your own uart for tht u will find its code in downloads ..

amarhw

Sat Aug 15 2009, 04:29AM

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Thanks
How I can convert .hex file to C code ?
By the way , you do not need to connect the Rx pin of the GPS to the Tx of the microcontroller.
My idea is to connect the GSM module to UART0 because it is easier to send and receive using it, and connecting the GPS to P1.4 .