Precise positioning! GPS positioning and track recorder DIY tutorial

GPS positioning and track recorder based on C3-370C!

I bought the C3-370C GPS in the mail order department and prepared to do GPS track recording because I always wanted to add coordinate information to the photos of the tour...

I started to use M48 as the control mcu. The result was written and found that there is not enough Flash space. I want to change M8 or M88, but I don't want to buy it. There are just two STC90C52 and 8K on the hand, so I put it on C52.

C52 does not have AD, then the battery detection is a problem, so a 2904 op amp is removed from the bad multimeter, and a simple battery voltage detection is made.

Now the power supply of the entire device is directly provided by the lithium battery, with a 880mah mobile phone battery, can be used for about 6 hours;

I use 24C64 to record track information, including a set of information including date and time, latitude and longitude, can store 512, according to 1min / bar, can save 8 hours.

The data is transmitted to the host computer through the serial port, and the host computer software converts the data, and can also directly output the KML file and open it in the Goole earth.

Button 0: Short press (visible satellite information | coordinate data); long press (Run | Pause);

Button 1: Short press (record current coordinate data); long press (pause time to delete all data);

Button 2: Short press (backlight); long press (record mode switch H/A90s/A60s/A30s/A10s);

Precise positioning! GPS positioning and track recorder DIY tutorial