基于C3-370C的GPS定位及轨迹记录仪！

在51hei买了C3-370C的GPS，准备做GPS轨迹记录，因为我一直想在旅游的照片上加上坐标信息……

开始用M48作控制MCU，结果写着写着，发现Flash空间不足，想换个M8或M88的，在常州还不好买，手上正好还有两块STC90C52，8K的，于是就换上C52了。

C52不带AD，那电池检测又成问题，于是从坏的万用表上拆下一个2904运放，做了个简单的电池电压检测。

现在整个设备的供电都由锂电池直接提供，配一块880mah的手机电池，可以用6小时左右；

我用24C64记录轨迹信息，包括日期时间、经纬度在内的一组信息，可存储512条，按1min/条，可存8小时。

数据通过串口传给上位机，上位机软件转换数据，也可直接输出KML文件，在Goole earth中打开。

按键0: 短按(可见卫星信息|坐标数据); 长按(运行|暂停);
按键1: 短按(记录当前坐标数据); 长按(暂停时长按删除所有数据);
按键2: 短按(背光灯); 长按(记录模式切换H/A90s/A60s/A30s/A10s);



视图1



背光灯开启



界面说明



液晶背后的主控板



30S自动记录模式



可见卫星信息



连接电脑上传数据



PC端接收数据



删除数据



背面



左侧



右侧


在GooleEarth打开


运放低电压指示电路

最近想着给它加个壳，费了一些时间，找到了一个东东，感觉做外壳不错，就是ADSL的分频器，不过体积小了不少， 尺寸只有60X44X21！

于是想做就做吧，为了减小体积，能用贴片的元件都换成贴片的，幸好最近出了Atmega8a这个价格还算合理的AVR片子， 上位机软件也做了调整，将照片匹配软件与上位机软件合成。 主程序文件：

#include "_STC90.h"

#include "_GPS.h"

sbit C_LED = P0^4; //数据通讯指示

sbit Key0 = P3^3;

sbit Key1 = P1^2;

sbit Key2 = P1^0;

bit flg_gsv=0;

bit flg_mode=0;

bit flg_upload=0;

bit flg_rx=0;

bit flg_rxf=0;

uchar flg_rmcgga=0; //1rmc 2gga

void get_gpsmode(void)

{

if(!flg_mode){

if(buf_gps[3]=='M' && buf_gps[4]=='C') flg_rmcgga = 1; //RMC

else{

if(buf_gps[3]=='G' && buf_gps[4]=='A') flg_rmcgga = 2; //GGA

else flg_rx = 0;

}

}

else{

if(buf_gps[3]=='S' && buf_gps[4]=='V') flg_rmcgga = 3; //GGA

else flg_rx = 0;

}

}

void UART_RX(void) interrupt 4

{

uchar tp_rx;

while(!RI);

tp_rx = SBUF;

if(!flg_rxf){

if(flg_rx){

buf_gps[count_gps] = tp_rx;

if(count_gps==4) get_gpsmode();

if(tp_rx=='*'){ flg_rx = 0; flg_rxf = 1;}

else count_gps++;

}

else{

if(tp_rx=='$'){ flg_rx = 1; count_gps = 0; flg_rmcgga = 0;}

}

}

if(tp_rx=='#') flg_upload = 1;

RI = 0;

}

void UART_TX(uchar tp_tx)

{

SBUF = tp_tx;

while(!TI);

TI = 0; _nus(100);

}

uchar var_js7=36;

uchar var_js5=0;

uchar var_js4=0;

uint var_jsrec=0;

//60ms

void TIMER2_SEV(void) interrupt 5

{

TF2 = 0;

if(var_js7>0) var_js7--;

if(var_js5>0) var_js5--;

if(var_js4>0) var_js4--;

if(var_jsrec>0) var_jsrec--;

}

void initial(void)

{

C_LED = 0;

GPS_EN = 0;

EA = 0;

AUXR = 0x01;

IPH = 0x0c; IP = 0x14;

SCON = 0x50;

PCON = 0x00;

RI = 0; TI = 0; ES = 1;

TCON = 0x00;

TMOD = 0x21;

TH1 = 256-6; TL1 = 256-6; ET1 = 0; TR1 = 1;

T2CON = 0x00; T2MOD = 0x00;

RCAP2H = (65536-55296)/256; RCAP2L = (65536-55296)%256;

ET2 = 1; TR2 = 1;

I2C_Init();

L5_init();

L5_wrstr_cn(24,2,0,4,4); //卫星定位

L5_wrstr_cn(24,4,4,4,4); //轨迹记录

EA = 1;

while(var_js7>0);

Lgps_disp_init();

C_LED = 1;

}

void Key_deal(void)

{

uchar jk=255;

C_LED = 0; EA = 0; flg_rx = 0; flg_rxf = 0;

if(!Key0){

do{ _nms(8); jk--;}while(!Key0 && jk>0);

if(jk>0){

flg_mode = !flg_mode;

L5_setxy(0,1); ofs = 0; line = 0x00; Lwr_icob(336);

if(!flg_mode) Lgps_disp_dt();

}

else{

flg_sata = !flg_sata; L5_SATA();

GPS_EN = flg_sata;

}

do{ while(!Key0); _nms(5);}while(!Key0);

}

if(!Key1){

do{ _nms(20); jk--;}while(!Key1 && jk>0);

if(jk>0){ at_onewr('H'); var_js4 = 10;}

else at_format();

do{ while(!Key1); _nms(5);}while(!Key1);

}

if(!Key2){

do{ _nms(8); jk--;}while(!Key2 && jk>0);

if(jk>0) L5_LED = !L5_LED;

else{

while(!Key2){

rec_add();

_nms(255); _nms(255); _nms(255); _nms(255);

}

var_jsrec = var_rec*50; var_jsrec/=3;

}

}

C_LED = 1; EA = 1;

}

void main(void)

{

initial();

while(1){

if(flg_rxf){

if(flg_sign) C_LED = 0;

L5_ComData(1); var_js5 = 6;

get_cama();

if(!flg_mode){

if(flg_rmcgga==1) L5_RMC();

else if(flg_rmcgga==2) L5_GGA();

}

else{

if(flg_rmcgga==3){

if(!flg_gsv){

L5_GSV();

if(buf_gps[8]=='3') flg_gsv = 1;

}

else{

if(buf_gps[8]=='2'){ L5_GSV(); flg_gsv = 0;}

}

}

}

for(count_gps=0;count_gps<96;count_gps++)

buf_gps[count_gps]=0;

C_LED = 1; flg_rxf = 0;

}

if(var_js5==1){ L5_ComData(0); var_js5 = 0;}

if(var_js7==0){ L5_BAT(); var_js7 = 16;}

if(!(Key0&Key1&Key2)){ _nms(5); Key_deal();}

if(var_js4==1){ L5_AtWr(0); var_js4 = 0;}

if(!flg_sata){

if(var_rec>0){

if(var_jsrec==0){

at_onewr('A'); var_js4 = 10;

var_jsrec = var_rec*50; var_jsrec/=3;

}

}

}

if(flg_upload){

if(flg_sata){

uint k; uchar r;

C_LED = 0; EA = 0; flg_rx = 0; flg_rxf = 0;

for(k=0;k

AT24C64_RdPage(k*16);

UART_TX(k/256); UART_TX(k%256);

for(r=0;r<16;r++) UART_TX(C64_buf[r]);

L5_sch(1,1,k,at_id);

}

EA = 1; L5_sch(0,0,0,0); C_LED = 1;

}

flg_upload = 0;

}

}

}

_gps.h 文件：

#include "_STC90.h"

#include "_LCD5110.h"

#include "_AT24C64.h"

#define Bat_full 10 //电量满

#define Bat_empt 11 //电量空

#define Signal 12 //信号

#define NoSignal 13 //信号

#define file 14 //文件

#define Sata_run 15 //状态运行

#define Sata_pause 16 //状态暂停

#define Ico_gps 17 //GPS

#define Ico_com 18 //数据通讯

#define Ico_del 19 //删除

#define Ico_upload 20 //上传

#define Ico_wait 21 //等待

#define chr_point 22 //大'.'

#define chr_degree 23 //度

#define chr_min 24 //分

#define Ico_point 25 //小度

#define Ico_degree 26 //小度

sbit Bat_Low = P1^4; //电池0低

sbit GPS_EN = P3^5; //GPS使能

uchar buf_gps[96]={0};

uchar count_gps=0;

bit flg_sign=0;

uchar var_seg[20]={0};

uchar ofs=0;

uchar line=0x00;

void get_cama(void)

{

uchar tp_c=0,cj;

for(cj=0;cj<20;cj++) var_seg[cj] = 0;

for(cj=0;cj

if(buf_gps[cj]==','){ var_seg[tp_c] = cj; tp_c++;}

}

void Lwr_icob(uint nb){ for(;nb>0;nb--) L5_wrbyte(1,line);}

void Lwr_ico(uchar ic)

{

uchar i0,i1;

switch(ic){

case '0': case '1': case '2': case '3': case '4':

case '5': case '6': case '7': case '8': case '9':

i0 = (ic-48)*4; i1 = i0+4; break;

case 10: i0 = 65; i1 = 75; break; //电量满

case 11: i0 = 75; i1 = 85; break; //电量空

case 12: i0 = 40; i1 = 50; break; //信号有

case 13: i0 = 50; i1 = 60; break; //信号无

case 14: i0 = 60; i1 = 65; break; //文件

case 15: i0 = 137; i1 = 143; break; //运行图标

case 16: i0 = 143; i1 = 149; break; //暂停图标

case 17: i0 = 85; i1 = 105; break; //GPS

case 18: i0 = 164; i1 = 173; break; //数据传输

case 19: i0 = 173; i1 = 180; break; //删除×

case 20: i0 = 180; i1 = 187; break; //上传

case 21: i0 = 187; i1 = 194; break; //等待

case 'D': i0 = 131; i1 = 137; break; //'D'

case ':': i0 = 115; i1 = 117; break; //':'

case '/': i0 = 105; i1 = 109; break; //'/'

case '.': i0 = 109; i1 = 111; break; //'.'

case '-': i0 = 111; i1 = 115; break; //'-'

case '%': i0 = 194; i1 = 202; break; //'%'

case 'k': i0 = 117; i1 = 131; break; //'kmh'

case 'm': i0 = 121; i1 = 127; break; //'m'

case 's': i0 = 159; i1 = 164; break; //'s'

case 'A': i0 = 202; i1 = 207; break; //'A'

case 'H': i0 = 207; i1 = 212; break; //'H'

case 'N': i0 = 212; i1 = 217; break; //'N'

case 'S': i0 = 217; i1 = 222; break; //'S'

case 'E': i0 = 222; i1 = 227; break; //'E'

case 'W': i0 = 227; i1 = 232; break; //'N'

case 22: i0 = 149; i1 = 152; break; //大'.'

case 23: i0 = 152; i1 = 156; break; // °

case 24: i0 = 156; i1 = 159; break; //'

case 25: i0 = 232; i1 = 235; break; //中点

case 26: i0 = 235; i1 = 238; break; //小度

default: i0 = ic*4; i1 = i0+4; break; //数字

}

for(;i0

}

void Lwr_icos(uchar cs,uchar cl)

{

uchar k;

for(k=0;k

}

void Lwr_icoh(uchar *hs){ while(*hs){ Lwr_ico(*hs); hs++;}}

void L5_wr_chr(uchar nc)

{

uchar l,n;

switch(nc){

case 'N': n = 19; break;

case 'S': n = 22; break;

case 'E': n = 16; break;

case 'W': n = 24; break;

case 'H': n = 18; break;

case 'A': n = 14; break;

case 'G': n = 17; break;

case 'P': n = 20; break;

case 'R': n = 21; break;

case 'M': n = 18; break;

case 'C': n = 15; break;

ca