单片机接受不到信号怎么回事，已经确定gps连接没问题，求大神指导！！！！

ID:114908 · 发表于 2016-5-7 23:34

main()
{
unsigned char i;
char Bhour;
AUXR = AUXR|0x40;  // T1, 1T Mode
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 = 0x20; /* TMOD: timer 1, mode 2, 8-bit reload */
PCON = 0x00;
if(GPS_SPD){
TH1 = 0x70; /* TH1: reload value for 9600 baud @ 11.059MHz */
}else{
TH1 = 0x70; /* TH1: reload value for 4800 baud @ 11.059MHz */
}
   EA = 1;
ES = 1;
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)
{    RI = 0;
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
if(byte_count<1){
   if (tmp=='A') {lock=1;}
   else{
      lock=0;}
}
break;
case 3: //纬度处理
if(byte_count<9){
WD[byte_count]=tmp;
}
break;
case 4: //纬度方向处理
if(byte_count<1){
WD_a=tmp;
}
break;
case 5: //经度处理
if(byte_count<10){
JD[byte_count]=tmp;
}
break;
case 6: //经度方向处理
if(byte_count<1){
JD_a=tmp;
}
break;
case 7: //速度处理
if(byte_count<5){
speed[byte_count]=tmp;
}


break;
case 8: //方位角处理
if(byte_count<5){
angle[byte_count]=tmp;
}
break;
case 9: //方位角处理
if(byte_count<6){
date[byte_count]=tmp;
}
break;

}
break;
}
}
byte_count++; //接收数位加1
break;
}
}
RI=0;
}

ID:119182 · 发表于 2016-5-7 23:41

确定你的串口与GPS通信是否正常

ID:98275 · 发表于 2016-5-8 03:19

先在proteus仿真，用串口助手给单片机发gps的信息，我也在整这个

ID:98275 · 发表于 2016-5-8 03:20

可以加我扣扣我告诉你怎么弄，我名字就是qq

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单片机接受不到信号怎么回事，已经确定gps连接没问题，求大神指导！！！！

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