It introduces the principle of “Beidou I” satellite navigation system, presents the processes of making an embedded Linux based on PC104 motherboard. Finally, it elaborates on the design of software used in “Beidou I” satellite navigation system based on the GUI software MiniGUI. This software can perform the following three main functions: position, navigation, time service through the communication between the RS232 ports of PC104 motherboard and satellite signal receiver. Through these functions, vehicle...