基于C3-370C的GPS定位及軌跡記錄儀！

在51hei買了C3-370C的GPS，準備做GPS軌跡記錄，因為我一直想在旅游的照片上加上坐標信息……

開始用M48作控制MCU，結果寫著寫著，發現Flash空間不足，想換個M8或M88的，在常州還不好買，手上正好還有兩塊STC90C52，8K的，于是就換上C52了。

C52不帶AD，那電池檢測又成問題，于是從壞的萬用表上拆下一個2904運放，做了個簡單的電池電壓檢測。

現在整個設備的供電都由鋰電池直接提供，配一塊880mah的手機電池，可以用6小時左右；

我用24C64記錄軌跡信息，包括日期時間、經緯度在內的一組信息，可存儲512條，按1min/條，可存8小時。

數據通過串口傳給上位機，上位機軟件轉換數據，也可直接輸出KML文件，在Goole earth中打開。

按鍵0: 短按(可見衛星信息|坐標數據); 長按(運行|暫停);
按鍵1: 短按(記錄當前坐標數據); 長按(暫停時長按刪除所有數據);
按鍵2: 短按(背光燈); 長按(記錄模式切換H/A90s/A60s/A30s/A10s);



視圖1



背光燈開啟



界面說明



液晶背后的主控板



30S自動記錄模式



可見衛星信息



連接電腦上傳數據



PC端接收數據



刪除數據



背面



左側



右側


在GooleEarth打開


運放低電壓指示電路

最近想著給它加個殼，費了一些時間，找到了一個東東，感覺做外殼不錯，就是ADSL的分頻器，不過體積小了不少， 尺寸只有60X44X21！  

于是想做就做吧，為了減小體積，能用貼片的元件都換成貼片的，幸好最近出了Atmega8a這個價格還算合理的AVR片子， 上位機軟件也做了調整，將照片匹配軟件與上位機軟件合成。 主程序文件：

#include "_STC90.h"

#include "_GPS.h"

sbit C_LED = P0^4; //數據通訊指示

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); //衛星定位

L5_wrstr_cn(24,4,4,4,4); //軌跡記錄

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 //電量滿

#define Bat_empt   11 //電量空

#define Signal     12 //信號

#define NoSignal   13 //信號

#define file       14 //文件

#define Sata_run   15 //狀態運行

#define Sata_pause 16 //狀態暫停

#define Ico_gps    17 //GPS

#define Ico_com    18 //數據通訊

#define Ico_del    19 //刪除

#define Ico_upload 20 //上傳

#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; //電池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; //電量滿

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

case 12: i0 = 40;  i1 = 50;  break; //信號有

case 13: i0 = 50;  i1 = 60;  break; //信號無

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

case 15: i0 = 137; i1 = 143; break; //運行圖標

case 16: i0 = 143; i1 = 149; break; //暫停圖標

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

case 18: i0 = 164; i1 = 173; break; //數據傳輸

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

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

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; //中點

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

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

}

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;

case ',': n = 11; break;

case '.': n = 13; break;

case '-': n = 12; break;

case '*': n = 10; break;

case 'V': n = 23; break;

default: n = nc-48; break;

}

for(l=0;l<6;l++) L5_wrbyte(1,ASCII326[n][l]);

}

void L5_wr_chrs(uchar ch,uchar lc)

{

  uchar k;

for(k=0;k}

void L5_wr_chrh(uchar *hr){ while(*hr){ L5_wr_chr(*hr); hr++;}}

uchar chrtodec(uchar cd){return buf_gps[cd]-48;}

uchar chr_dec(uchar cf){ return chrtodec(cf)*10+chrtodec(cf+1);}

/void Lwr_dec(uchar dec){ Lwr_ico(dec/10); Lwr_ico(dec%10);}

void L5_RMC(void)

{

uchar tp_h,tp_y,tp_m,tp_d; 

bit flg_d=0;              

  L5_setxy(56,5); ofs = 3; line = 0x02;

tp_h = chr_dec(6)+8;

if(tp_h>23){ tp_h%=24; flg_d = 1;}   

Lwr_dec(tp_h); Lwr_ico(':');              

Lwr_icos(8,2); Lwr_ico(':'); Lwr_icos(10,2);

L5_CE = 1;

C64_buf[3] = tp_h;

C64_buf[4] = chr_dec(8); C64_buf[5] = chr_dec(10); 

L5_setxy(32,5);

tp_m = chr_dec(var_seg[8]+3);          

tp_d = chr_dec(var_seg[8]+1); 

if(flg_d){

switch(tp_m){

case 4: case 6: case 9: case 11: