51单片机读取GPS数据C程序

/************************************* GPS解码12864显示程序 作者：HEKUN ***************************************/ #include "GPSData.h" //#include <reg51.h> //#include <stdio.h> char code TIME_AREA= 8; //时区 //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 time[6]; //时间 unsigned char speed[4]; unsigned char date[6]; //串口中断需要的变量 unsigned char seg_count; //逗号计数器 //unsigned char dot_count; //小数点计数器 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; //void sys_init(void); main() { unsigned char i; unsigned char Tim0,Tim1; // unsigned char data2; // char Bhour=0; sys_init(); while(1) { if(buf_full==0) //无GPS信号时 { dsp_count++; if(dsp_count>=65000){ //initial_lcd1602();//Init_Lcd12864(); //清屏 //ResetCursor(0,2); lcd_displaystr(0,0x00,"No GPS ..");//printf("No GPS connect.."); while(buf_full==0); //ClearAS(); dsp_count=0; } } else if(buf_full) { //有GPS信号时 //RMC语句 //ResetCursor(0,0); //lcd_displaystr(0,0x00,"GPS System!"); lcd_displaystr(1,0x00,"JD: E");//printf("JD:"); //ResetCursor(3,0); //printf("%c",JD_a); //显示经度 for(i=0;i<10;i++){ LCD_write_char(1,0x03+i,JD[i]); //ResetCursor(i+4,0); //printf("%c",JD[i]); } delay_nms(10000); //ResetCursor(0,1); lcd_displaystr(1,0x00,"WD: N"); //printf("WD:"); // ResetCursor(3,1); //printf("%c",WD_a); for(i=0;i<9;i++) //显示纬度 { LCD_write_char(1,0x03+i,WD[i]); // ResetCursor(i+4,1); // printf("%c",WD[i]); } delay_nms(10000); //ResetCursor(0,2); lcd_displaystr(1,0x00,"BJT: : : ");//printf("BJT:"); // ResetCursor(4,2); // printf("%c",date[4]); // ResetCursor(5,2); // printf("%c",date[5]); // ResetCursor(6,2); // printf("%c",date[2]); // ResetCursor(7,2); // printf("%c",date[3]); // ResetCursor(8,2); // printf("%c",date[0]); // ResetCursor(9,2); // printf("%c",date[1]); // time[0]=((time[0]-'0')*10+(time[1]-'0'))/10+'0'; // time[1]=((time[0]-'0')*10+(time[1]-'0'))%10+'0'; // for(i=0;i<6;i++) //显示Time // { ///LCD_write_char(1,0x05,((time[1]-0x30)+8)/10+time[0]); ///delay_nms(5); ///LCD_write_char(1,0x06,((time[1]-0x30)+8)%10); ///delay_nms(5); if(((time[1]-0x30)+(time[0]-0x30)*10)<16) { Tim0=((time[1]-0x30)+8)/10+(time[0]-0x30); Tim1=((time[1]-0x30)+8) %10; delay_nms(5); } else if(((time[1]-0x30)+(time[0]-0x30)*10)>15) { Tim0=0; Tim1=((time[1]-0x30)+(time[0]-0x30)*10)-16; delay_nms(5); } LCD_write_char(1,0x05,Tim0); LCD_write_char(1,0x06,Tim1); LCD_write_char(1,0x08,time[2]); LCD_write_char(1,0x09,time[3]); LCD_write_char(1,0x0b,time[4]); LCD_write_char(1,0x0c,time[5]); //ResetCursor(i+10,2); //printf("%c",time[i]); // } delay_nms(10000); // ResetCursor(0,3); //// printf("Speed:"); // for(i=0;i<4;i++) //显示speed // { // ResetCursor(i+6,3); /// printf("%c",speed[i]); // } // ResetCursor(10,3); // printf("knots"); lcd_displaystr(1,0x00,"RQ: 20 - - "); LCD_write_char(1,0x06,date[4]); LCD_write_char(1,0x07,date[5]); LCD_write_char(1,0x09,date[2]); LCD_write_char(1,0x0a,date[3]); LCD_write_char(1,0x0c,date[0]); LCD_write_char(1,0x0d,date[1]); delay_nms(10000); // /// dsp_count=0; buf_full&=~0x01; } } } //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 */ TH1=TL1=0xf9; /* TH1: reload value for 4800 baud @ 11.059MHz */ TR1 = 1; /* TR1: timer 1 run */ //Init_Lcd12864(); //初始化LCD //ResetCursor(0,1); initial_lcd1602(); lcd_displaystr(0,0x00,"GPS System!");//printf("GPS Monitor V1.2"); //ClearAS(); 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 '*': mode=0; buf_full=1; 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]=='R'){ if(cmd[3]=='M'){ if(cmd[4]=='C'){ cmd_number=1; mode=2; seg_count=0; byte_count=0; } } } } } }