分享个GPS显示时间地点,温度的设计
仿真原理图如下(proteus仿真工程文件可到本帖附件中下载)
单片机源程序如下:
- #include"GPS.h"
- #include "stm32f10x.h"
- #include<math.h>
- u8 GpsBuffer[NMEA_COUNT_MAX]={0};
- //char FindString[80];
- char *pFindString="$GPRMC,015152.589,V,0000.0000,N,00000.0000,E,,,020504,,*11\r\n";
- u8 GpsFlag;
- GPSINFO GpsInfo;
- extern char dingwei[];
- extern u8 dingwei_CRC[];
- extern u8 dingwei_data[30];
- void GpsDataInit(void)
- {
- GpsInfo.UtcTime[10]='\0';
- GpsInfo.Latitude[9]='\0';
- GpsInfo.Longitude[10]='\0';
- GpsInfo.Speed[5]='\0';
- GpsInfo.Azimuth[5]='\0';
- GpsInfo.UtcData[6]='\0';
- GpsInfo.Altitude[7]='\0';
-
- }
- u16 FindStr(u8 *str,u8 *ptr)
- {
- u16 index=0;
- u8 *STemp=NULL;
- u8 *PTemp=NULL;
- u8 *MTemp=NULL;
- if(0==str||0==ptr)
- return 0;
- for(STemp=str;*STemp!='\0';STemp++) //依次查找字符串
- {
- index++; //当前偏移量加1
- MTemp=STemp; //指向当前字符串
- //比较
- for(PTemp=ptr;*PTemp!='\0';PTemp++)
- {
- if(*PTemp!=*MTemp)
- break;
- MTemp++;
- }
- if(*PTemp=='\0') //出现了所要查找的字符,退出
- break;
- }
- return index;
- }
- //GPS解析
- void GPSParse(void)
- {
- u8 CommaNum=0; //逗号数
- u8 BufIndex=0; //数字量
- u8 Sbuf;
- u8 *Pstr;
- u16 index;
- memset(&GpsInfo,0x00,sizeof(GpsInfo));//清除结构体
- index= FindStr(GpsBuffer,"$GPRMC,");//查找
- if(index)
- {
- CommaNum=0;
- Pstr=GpsBuffer+index+6; //找到GPRMC,后面的地址
- do
- {
- Sbuf=*Pstr++;
- // USART_SendData(USART1,Sbuf);
- switch(Sbuf)
- {
- case ',':CommaNum++; //通过逗号的数目来进行状态分类
- BufIndex=0;
- break;
- default:
- switch(CommaNum)
- {
- case 0:GpsInfo.UtcTime[BufIndex]=Sbuf;break;
- case 1:GpsInfo.Statue=Sbuf; break;
- case 2:GpsInfo.Latitude[BufIndex]=Sbuf;break;
- case 3:GpsInfo.LatitudeNS=Sbuf;break;
- case 4:GpsInfo.Longitude[BufIndex]=Sbuf;break;
- case 5:GpsInfo.LongitudeEW=Sbuf;break;
- case 6:GpsInfo.Speed[BufIndex]=Sbuf;break;
- case 7:GpsInfo.Azimuth[BufIndex]=Sbuf;break;
- case 8:GpsInfo.UtcData[BufIndex]=Sbuf;break;
- default:break;
- }
- BufIndex++; //
- break;
- }
- }while(Sbuf!='*');//直到出现‘*’退出
-
- }
- //如上操作
- index= FindStr(GpsBuffer,"$GPGGA,");
- if(index)
- {
- CommaNum=0;
- Pstr=GpsBuffer+index+6;
- do
- {
- Sbuf=*Pstr++ ;
- switch(Sbuf)
- {
- case ',':CommaNum++;
- BufIndex=0;
- break;
- default:
- switch(CommaNum)
- {
- case 0:break;
- case 1:break;
- case 2:break;
- case 3:break;
- case 4:break;
- case 5:break;
- case 6:break;
- case 7:break;
- case 8:GpsInfo.Altitude[BufIndex]=Sbuf;break;
- default:break;
- }
- BufIndex++;
- break;
- }
- }while(Sbuf!='*');
- }
- dingwei_data[2]=(GpsInfo.UtcData[4]-0x30)*10+(GpsInfo.UtcData[5]-0x30);//年
- dingwei_data[3]=(GpsInfo.UtcData[2]-0x30)*10+(GpsInfo.UtcData[3]-0x30);//月
- dingwei_data[4]=(GpsInfo.UtcData[0]-0x30)*10+(GpsInfo.UtcData[1]-0x30);//日
- dingwei_data[5]=((GpsInfo.UtcTime[0]-0x30)*10+(GpsInfo.UtcTime[1]-0x30)+8);//时
- dingwei_data[6]=((GpsInfo.UtcTime[2]-0x30)*10+(GpsInfo.UtcTime[3]-0x30));//分
- dingwei_data[7]=((GpsInfo.UtcTime[4]-0x30)*10+(GpsInfo.UtcTime[5]-0x30));//秒
- if(GpsInfo.Statue==0x56) //状态为“V”未定位
- {
- dingwei_data[18]=dingwei_data[18]&0xEF;
- }
- if(GpsInfo.Statue==0x41) //状态为“A”已定位
- {
- dingwei_data[18]=dingwei_data[18]|0x10;
- }
- dingwei_data[18]=dingwei_data[18]|0x20;//实时定位
- }
- float LatToRad(u8 *Lat)
- {
- float Rad;
- u16 Data;
- Data=Lat[0]*10+Lat[1];
- Rad=Lat[2]*10+Lat[3]+Lat[5]*0.1+Lat[6]*0.01+Lat[7]*0.001+Lat[8]*0.0001;
- Rad=Rad/60;
- Rad=Rad+Data;
- return Rad;
-
- }
- float LonToRad(u8 *Lon)
- {
- float Rad;
- u16 Data;
- Data=Lon[0]*100+Lon[1]*10+Lon[2];
- Rad=Lon[3]*10+Lon[4]+Lon[6]*0.1+Lon[7]*0.01+Lon[8]*0.001+Lon[9]*0.0001;
- Rad=Rad/60;
- Rad=Rad+Data;
- return Rad;
- }
- ……………………
- …………限于本文篇幅 余下代码请从51黑下载附件…………
复制代码- /*************************************
- GPS解码显示程序,
- ***************************************/
- #include<reg52.h>
- #include "1602.h"
- //#include"math.h"
- //#include <stdlib.h>
- sbit GPS_SPD=P1^1; //GPS模块速率设置
- sbit KEY1=P1^0; //显示内容分屏切换,(T0,T1引脚 的第二功能为计数器。)
- char code TIME_AREA= 8; //时区
- /***************************************
- 这是做的部分更改
- ************************************/
- unsigned long maxspeed,b;
- unsigned int count=0;
- unsigned int a[5];
- unsigned char hspeed[5];
- unsigned int dot_count; //小数点计数器
- //unsigned char x;
- //GPS数据存储数组
- unsigned char JD[10]; //经度
- unsigned char JD_a; //经度方向
- unsigned char WD[9]; //纬度
- unsigned char WD_a; //纬度方向
- unsigned char date[6]; //日期
- unsigned char time[6]; //时间
- unsigned char speed[5]={'0','0','0','.','0'}; //速度
- unsigned char high[6]; //高度
- unsigned char angle[5]={'0','0','0','0','0'}; //方位角
- unsigned char use_sat[2]; //使用的卫星数
- unsigned char total_sat[2]; //天空中总卫星数
- unsigned char lock; //定位状态
- //串口中断需要的变量
- unsigned char seg_count; //逗号计数器
- unsigned char byte_count; //位数计数器
- unsigned char cmd_number; //命令类型
- unsigned char mode; //0:结束模式,1:命令模式,2:数据模式
- unsigned char buf_full; //1:整句接收完成,相应数据有效。0:缓存数据无效。
- unsigned char cmd[5]; //命令类型存储数组
- //显示需要的变量
- unsigned int dsp_count; //刷新次数计数器
- //unsigned char time_count;
- bit page;
- void sys_init(void);
- bit chk_key(void);
- main()
- {
- unsigned char i;
- char Bhour;
- sys_init();
- lock=1;
- use_sat[0]='0';
- use_sat[1]='0';
- total_sat[0]='0';
- total_sat[1]='0';
- while(1){
- if(buf_full==0) //无GPS信号时
- {
- dsp_count++;
- if(dsp_count>=65000){
- LCD_cls(); //清屏
- LCD_write_string(0,0,"No GPS connect..");
- LCD_write_string(0,1,"Please Check..");
- while(buf_full==0);
- LCD_cls();
- dsp_count=0;
- }
- }
- else{ //有GPS信号时
- /*************************************
- 最大速度处理
- *************************************/
- dot_count=0;
- b=0;
- for(i=0;i<5;i++)
- {
- if(speed[i]!='.')
- dot_count++;
- else
- break ;
- }
- switch(dot_count)
- {
-
- case 1:
- b=((speed[0]-'0')*10+(speed[2]-'0'))*1.852;
- break;
- case 2:
- b=((speed[0]-'0')*100+(speed[1]-'0')*10+(speed[4]-'0'))*1.852;
- break;
- case 3:
- b=((speed[0]-'0')*1000+(speed[1]-'0')*100+(speed[2]-'0')*10+(speed[4]-'0'))*1.852;
- break;
-
- }
- if(b>maxspeed)
- {
- maxspeed=b;
- }
- /*************************************
- 最大速度处理
- *************************************/
-
- if(chk_key()){ //检测到按键切换显示
- page=!page;
- LCD_cls();
- }
- if(!page){ //页面1
-
- if(buf_full|0x01){ //GGA语句
- if(lock==0){ //如果未定位
- LCD_write_string(0,0,"*---.--.---- ");
- LCD_write_string(0,1,"* --.--.---- ");
- }else{ //如果已定位
-
- LCD_write_char(0,0,JD_a); //显示经度
- for(i=0;i<3;i++)
- {
- LCD_write_char(i+1,0,JD[i]);
- }
- LCD_write_char(4,0,'.');
- for(i=3;i<10;i++)
- {
- LCD_write_char(i+2,0,JD[i]);
- }
- LCD_write_char(0,1,WD_a); //显示纬度
- LCD_write_char(1,1,' ');
- for(i=0;i<2;i++)
- {
- LCD_write_char(i+2,1,WD[i]);
- }
- LCD_write_char(4,1,'.');
- for(i=2;i<9;i++)
- {
- LCD_write_char(i+3,1,WD[i]);
- }
-
- }
- LCD_write_char(14,1,use_sat[0]); //显示接收卫星数
- LCD_write_char(15,1,use_sat[1]);
- buf_full&=~0x01;
- dsp_count=0;
- }
- if(buf_full|0x02){ //GSV语句
- LCD_write_char(14,1,total_sat[0]);
- LCD_write_char(15,1,total_sat[1]);
- buf_full&=~0x02;
- dsp_count=0;
- }
- if(buf_full|0x04){
- if(lock==0){ //如果未定位
- LCD_write_string(0,0,"*---.--.---- ");
- LCD_write_string(0,1,"* --.--.---- ");
- }else{ //如果已定位
- LCD_write_char(0,0,JD_a); //显示经度
- for(i=0;i<3;i++)
- {
- LCD_write_char(i+1,0,JD[i]);
- }
- LCD_write_char(4,0,'.');
- for(i=3;i<10;i++)
- {
- LCD_write_char(i+2,0,JD[i]);
- }
- LCD_write_char(0,1,WD_a); //显示纬度
-
- LCD_write_char(1,1,' ');
- for(i=0;i<2;i++)
- {
- LCD_write_char(i+2,1,WD[i]);
- }
- LCD_write_char(4,1,'.');
- for(i=2;i<9;i++)
- {
- LCD_write_char(i+3,1,WD[i]);
- }
- }
- LCD_write_char(14,0,use_sat[0]); //显示接收卫星数
- LCD_write_char(15,0,use_sat[1]);
- buf_full&=~0x04;
- dsp_count=0;
- }
- }
- else{ //页面2
- if(buf_full|0x01){ //GGA语句
- buf_full&=~0x01;
- dsp_count=0;
- }
- if(buf_full|0x02){
- buf_full&=~0x02;
- dsp_count=0;
- }
- if(buf_full|0x04){ //RMC语句
- Bhour=((time[0]-0x30)*10+time[1]-0x30)+TIME_AREA;
- if(Bhour>=24){
- Bhour-=24;
- }else if(Bhour<0){
- Bhour+=24;
- }
- LCD_write_char(0,1,date[4]);
- LCD_write_char(1,1,date[5]);
- LCD_write_char(2,1,date[2]);
- LCD_write_char(3,1,date[3]);
- LCD_write_char(4,1,date[0]);
- LCD_write_char(5,1,date[1]);
- LCD_write_char(8,1,Bhour/10+0x30);
- LCD_write_char(9,1,Bhour%10+0x30);
- LCD_write_char(10,1,':');
- LCD_write_char(11,1,time[2]);
- LCD_write_char(12,1,time[3]);
- LCD_write_char(13,1,':');
- LCD_write_char(14,1,time[4]);
- LCD_write_char(15,1,time[5]);
- LCD_write_string(5,0,"knot A");
- if(lock=='0'){ //如果未定位
- LCD_write_string(0,0,"---.-");
- LCD_write_string(11,0,"---.-");
- }else{ //已经定位,在此处做的改动。
- /*******************************************************************************/
-
-
- if(count<10)
- {
-
- for(i=0;i<5;i++)
- {
- LCD_write_char(i,0,speed[i]);//knot显示
- }
- count++;
- }
- else
- {
- if(count>15)
- {
- count=0;
- }
- hspeed[0]=maxspeed/1000+0x30; //把小数转成字符数组
- hspeed[1]=(maxspeed/100)%10+0x30;
- hspeed[2]=(maxspeed/10)%10+0x30;
- hspeed[3]='.';
- hspeed[4]= maxspeed%10+0x30;
-
- count++;
- LCD_write_string(5,0,"Km/h A");
- LCD_write_char(0,0,hspeed[0]);
- LCD_write_char(1,0,hspeed[1]);
- LCD_write_char(2,0,hspeed[2]);
- LCD_write_char(3,0,hspeed[3]);
- LCD_write_char(4,0,hspeed[4]); //最大速度显 */
- }
-
- /*******************************************************************************/
- for(i=0;i<5;i++){
- LCD_write_char(11+i,0,angle[i]);
- }
- }
- buf_full&=~0x04;
- dsp_count=0;
- }
- }
- }
- }
- }
- bit chk_key(void)
- {
- if(!KEY1){
- delayms(10);
- if(!KEY1){
- while(!KEY1);
- delayms(10);
- return(1);
- }
- }
- LCD_cls(); //清屏
- return(0);
- }
- //系统初始化
- void sys_init() {
- unsigned char i;
- SCON = 0x50; /* SCON: mode 1, 8-bit UART, enable rcvr */
- TMOD = 0x21; /* TMOD: timer 1, mode 2, 8-bit reload */
- if(GPS_SPD){
- TH1 = 0xfa; /* TH1: reload value for 9600 baud @ 11.059MHz */
- }else{
- TH1 = 0xfd; /* TH1: reload value for 4800 baud @ 11.059MHz */
- }
- TR1 = 1; /* TR1: timer 1 run */
- LCD_init(8); //初始化LCD
- LCD_write_string(0,0," GPS SIRF II 2 ");
- LCD_write_string(0,1," 11-11-23 1342 ");
-
- for(i=1;i<4;i++){
- delayms(250);
- }
- //LCD_cls();
- IE=0x90; //开总中断、串口中断
- }
- //串口接收中断
- void uart(void) interrupt 4
- {
- unsigned char tmp;
- if(RI){
- tmp=SBUF;
- switch(tmp){
- case
- cmd_number=0; //命令类型清空
- mode=1; //接收命令模式
- byte_count=0; //接收位数清空
- break;
- case ',':
- seg_count++; //逗号计数加1
- byte_count=0;
- break;
- case '*':
- switch(cmd_number){
- case 1:
- buf_full|=0x01;
- break;
- case 2:
- buf_full|=0x02;
- break;
- case 3:
- buf_full|=0x04;
- break;
- }
- mode=0;
- break;
- default:
- if(mode==1){
- //命令种类判断
- cmd[byte_count]=tmp; //接收字符放入类型缓存
- if(byte_count>=4){ //如果类型数据接收完毕,判断类型
- if(cmd[0]=='G'){
- if(cmd[1]=='P'){
- if(cmd[2]=='G'){
- if(cmd[3]=='G'){
- if(cmd[4]=='A'){
- cmd_number=1;
- mode=2;
- seg_count=0;
- byte_count=0;
- }
- }
- else if(cmd[3]=='S'){
- if(cmd[4]=='V'){
- cmd_number=2;
- mode=2;
- seg_count=0;
- byte_count=0;
- }
- }
- }
- else if(cmd[2]=='R'){
- if(cmd[3]=='M'){
- if(cmd[4]=='C'){
- cmd_number=3;
- mode=2;
- seg_count=0;
- byte_count=0;
- }
- }
- }
- }
- }
- }
- }
- else if(mode==2){
- //接收数据处理
- switch (cmd_number){
- case 1: //类型1数据接收。GPGGA
- switch(seg_count){
- case 2: //纬度处理
- if(byte_count<9){
- WD[byte_count]=tmp;
- }
- break;
- case 3: //纬度方向处理
- if(byte_count<1){
- WD_a=tmp;
- }
- break;
- case 4: //经度处理
- if(byte_count<10){
- JD[byte_count]=tmp;
- }
- break;
- case 5: //经度方向处理
- if(byte_count<1){
- JD_a=tmp;
- }
- break;
- case 6: //定位判断
- if(byte_count<1){
- lock=tmp;
- }
- break;
- case 7: //定位使用的卫星数
- if(byte_count<2){
- use_sat[byte_count]=tmp;
- }
- break;
- case 9: //高度处理
- if(byte_count<6){
- high[byte_count]=tmp;
- }
- break;
- }
- break;
- case 2: //类型2数据接收。GPGSV
- switch(seg_count){
- case 3: //天空中的卫星总数
- if(byte_count<2){
- total_sat[byte_count]=tmp;
- }
- break;
- }
- break;
- case 3: //类型3数据接收。GPRMC
- switch(seg_count){
- case 1: //时间处理
- if(byte_count<6){
- time[byte_count]=tmp;
- }
- break;
- case 2: //定位判断
- ……………………
- …………限于本文篇幅 余下代码请从51黑下载附件…………
复制代码
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