main.c

a gps program

#include "includes.h"
#include "isr.h"
#include "uart.h"
#include "key.h"
#include "display.h"
#include "eeprom.h"

sbit MPH1 = P1^2;
sbit MPM1 = P1^3;
sbit GPS_OFF = P3^6;
sbit CD_U17 = P1^5;

bit FlagStart = 0, FlagStop = 0, FlagSYN, FlagType;
uchar idata Time[6], Date[6], Longitude[10], Latitude[9];
uchar idata GetCoun = 0;

uchar idata Year, Month, Day, Hour, Minute, Second, Week;
uchar idata Planet[2];

bit FlagAC;
uchar idata ACData[6];
uint idata Frequency = 0;
uchar idata ACCoun = 0;
uchar idata Timer_20, MS20;
ulong idata SecAC, Sec;

char MenuCoun = 0;

char idata Set[8], FlagSet = 0;
uchar DisCoun = 0, Flash = 1;

//主函数

void main (void)
{
    char i;
    int coun;
    float fre;
    uchar ms20;

    DelayMs(200);
	if (0x77 == read(0x30)) {
	    for (i = 0; i < 8; i++) {
		    DelayMs(50);
            Set[i] = read(i);
	    }
	}
	else {
	    memset(Set, 0, 8);
		for (i = 0; i < 8; i++)
            write(i, Set[i]);
		write(0x30, 0x77);
	}
    CPUInit();
    DisplayInit();
	SetBaud(9600);
    GPS_OFF = 0;

    while (1) {
        //采样次数够，可以计算频率
        if (FlagAC == 1) {
            coun = 0;
            for (i = 0; i < 5; i++) {
                coun += ACData[i];
            }
            fre = coun / 1.032 / 5;
            Frequency = (uint)fre;
            ACCoun = 0;
            FlagAC = 0;
        }
        //数据收全
        if (FlagStart == 1 && FlagStop == 1) {
            if (FlagType == 0) {
                ComputeDate();
                SendData0();
                Display();
            }
			GetCoun = 0;
            FlagStart = 0;
            FlagStop = 0;
        }

        if (Clock0 > 100) {
            KeyScan();
			DisCoun++;
            Clock0 = 0;
        }

		if (Clock1 > 250) {
			if (ms20 != MS20) {
			    ms20 = MS20;
			}
			else {
			    Sec = 0;
				SecAC = 0;
				MS20 = 0;
			}
			Clock1 = 0;
		}

		if (FlagSet) {
			if (DisCoun > 20) {
			    Display();
				Flash = !Flash;
				DisCoun = 0;
			}
	    }
    }
}