GPS定位LCD1602显示的单片机源码与实物制作 -

#include <reg52.h>
#include <intrins.h>
#include <stdio.h>
#include "delay.h"
#include "1602.h"
/**The UART1 stage1**/
#define STAGE_SOHE 0x01
#define STAGE_TYPE 0x02
#define STAGE_NONE 0x03
#define STAGE_DATA 0x04
unsigned char Lin0_No[16]="N:000.000000 ";//显示北纬
unsigned char Lin1_Ea[16]="E:000.000000 ";//显示东经
unsigned long xdata time_20ms=0;
unsigned char xdata devide_flag; //GPS数据逗号分隔符
unsigned char xdata speed_end; //收速度数据结束标志
unsigned char xdata dir_end; //收方向角数据结束标志
unsigned char xdata sysmode_GPS=0; //gps有效无效标志
unsigned char xdata ew_flag; //东西标志
unsigned char xdata ns_flag; //南北标志
unsigned char xdata gps_infor_weijing[17]; //暂存经纬度格式是以度分秒的是形式
unsigned char xdata gps_infor_speed[4]; //暂存速率
unsigned char xdata gps_infor_time[6]; //时间暂存
unsigned char xdata gps_infor_date[6]; //日期暂存
unsigned char xdata gps_infor_dir[3]; //方向暂存
unsigned char xdata recv1_step=STAGE_SOHE; //串口1接收指令步骤
unsigned char xdata uart1_r_buf; //串口的缓存
unsigned char xdata rev1_buf_busy; //串口接收忙碌标志
unsigned char xdata temp1_buf[85]; //串口接收数组
unsigned int xdata record1=0;
unsigned char times = 0; //延时计数
void Init_Timer0(void);//定时器初始化
void UART_Init(void);
void main (void)
{
unsigned char num=0;
unsigned long Mid_Du; //中间变量暂存经纬度的整数部分即度
unsigned long Mid_Fen; //中间变量暂存经纬度的小数部分即分 gps原始数据是度分秒格式
unsigned long Mid_Vale; ////中间变量暂存经纬度并将其扩大了10000000倍
unsigned char i ;
Init_Timer0(); //定时器0初始化
UART_Init();
LCD_Init(); //初始化液晶
DelayMs(20); //延时有助于稳定
LCD_Clear(); //清屏
DelayMs(120);
while(1) //主循环
{
if(sysmode_GPS==1) //检测gps是否有效数据
{
sysmode_GPS=0; //清除有效位
times = 0; //防止gps数据未更新就误判断数据无效
Mid_Du=(gps_infor_weijing[0]-0x30)*10000000+(gps_infor_weijing[1]-0x30)*1000000; //处理纬度暂存整数部分扩大10000000
Mid_Fen=(gps_infor_weijing[2]-0x30)*10000000+(gps_infor_weijing[3]-0x30)*1000000+
(gps_infor_weijing[4]-0x30)*100000+(gps_infor_weijing[5]-0x30)*10000+
(gps_infor_weijing[6]-0x30)*1000+(gps_infor_weijing[7]-0x30)*100; //处理纬度暂存小数部分扩大10000000
Mid_Fen=Mid_Fen/60; //分秒换算为小数位
Mid_Vale=Mid_Du+Mid_Fen; //最终纬度格式为000.00000000 非度分秒格式
Lin0_No[0]='N';
Lin0_No[1]=':';
Lin0_No[2]='0';
Lin0_No[3]=Mid_Vale/10000000+0x30; //将处理后的纬度填入字符串并打印显示
Lin0_No[4]=(Mid_Vale/1000000)%10+0x30;
Lin0_No[5]='.';
Lin0_No[6]=(Mid_Vale/100000)%10+0x30;
Lin0_No[7]=(Mid_Vale/10000)%10+0x30;
Lin0_No[8]=(Mid_Vale/1000)%10+0x30;
Lin0_No[9]=(Mid_Vale/100)%10+0x30;
Lin0_No[10]=(Mid_Vale/10)%10+0x30;
Lin0_No[11]=Mid_Vale%10+0x30;
Mid_Du=(gps_infor_weijing[8]-0x30)*100000000+(gps_infor_weijing[9]-0x30)*10000000+(gps_infor_weijing[10]-0x30)*1000000; //处理经度暂存整数部分扩大10000000
Mid_Fen=(gps_infor_weijing[11]-0x30)*10000000+(gps_infor_weijing[12]-0x30)*1000000+
(gps_infor_weijing[13]-0x30)*100000+(gps_infor_weijing[14]-0x30)*10000+
(gps_infor_weijing[15]-0x30)*1000+(gps_infor_weijing[16]-0x30)*100; //处理经度暂存小数部分扩大10000000
Mid_Fen=Mid_Fen/60; //分秒换算为小数位
Mid_Vale=Mid_Du+Mid_Fen; //最终经度格式为000.00000000 非度分秒格式
Lin1_Ea[0]='E';
Lin1_Ea[1]=':';
Lin1_Ea[2]=Mid_Vale/100000000+0x30; //将处理后的经度填入字符串并打印显示
Lin1_Ea[3]=(Mid_Vale/10000000)%10+0x30;
Lin1_Ea[4]=(Mid_Vale/1000000)%10+0x30;
Lin1_Ea[5]='.';
Lin1_Ea[6]=(Mid_Vale/100000)%10+0x30;
Lin1_Ea[7]=(Mid_Vale/10000)%10+0x30;
Lin1_Ea[8]=(Mid_Vale/1000)%10+0x30;
Lin1_Ea[9]=(Mid_Vale/100)%10+0x30;
Lin1_Ea[10]=(Mid_Vale/10)%10+0x30;
Lin1_Ea[11]=Mid_Vale%10+0x30;
}
else
{
times++;
if(times>4) //防止gps数据未更新就误判断数据无效
{
times = 0; //清零计数
Lin1_Ea[0]='G'; //无gps信号情况下打印正在连接
Lin1_Ea[1]='P';
Lin1_Ea[2]='S';
Lin1_Ea[3]=' '; //将处理后的纬度填入字符串并打印显示
Lin1_Ea[4]='L';
Lin1_Ea[5]='I';
Lin1_Ea[6]='N';
Lin1_Ea[7]='K';
Lin1_Ea[8]='I';
Lin1_Ea[9]='N';
Lin1_Ea[10]='G';
Lin1_Ea[11]='.';
for(i=0;i<12;i++) //数组重新填充
{
Lin0_No[i]=Lin1_Ea[i];
}
}
}
LCD_Write_String(0,0,Lin0_No);//显示第一行
LCD_Write_String(0,1,Lin1_Ea);//显示第二行
}
}
void Init_Timer0(void)
{
TMOD |= 0x01; //使用模式1，16位定时器，使用"|"符号可以在使用多个定时器时不受影响
TH0=(65536-20000)/256; //重新赋值 20ms
TL0=(65536-20000)%256;
EA=1; //总中断打开
ET0=1; //定时器中断打开
TR0=1; //定时器开关打开
}
void Timer0_isr(void) interrupt 1
{
TH0=(65536-20000)/256; //重新赋值 20ms
TL0=(65536-20000)%256;
time_20ms++;
}
void UART_Init(void)
{
SCON = 0x50; // SCON: 模式 1, 8-bit UART, 使能接收
TMOD |= 0x20; // TMOD: timer 1, mode 2, 8-bit 重装
TH1 = 0xFD; // TH1: 重装值 9600 波特率晶振 11.0592MHz
TR1 = 1; // TR1: timer 1 打开
EA = 1; //打开总中断
ES = 1; //打开串口中断
}
void UART_SER (void) interrupt 4 //串行中断服务程序
{
if(RI) //判断是接收中断产生
{
RI=0; //标志位清零
uart1_r_buf=SBUF; //提取buf中的值
rev1_buf_busy=0x00; //判别放置break问题
switch(recv1_step)
{
case STAGE_SOHE: if(uart1_r_buf == '') //判断接收到了具体原因参考GPS标准协议NMEA0183
{
rev1_buf_busy=0x01;
if(uart1_r_buf == '') //再次查看接收的是否是
{
recv1_step=STAGE_TYPE; //跳转到下一步
record1=0; //计数清零
}
else
{
recv1_step=STAGE_SOHE; //恢复初始化
record1=0;
}
}
break;
case STAGE_TYPE: if(rev1_buf_busy == 0x00)
{
rev1_buf_busy=0x01;
temp1_buf[record1]=uart1_r_buf;
record1++;
if(record1 == 0x05)
{ //查看$GPRMC开头的命令行
if((temp1_buf[0] == 'G') && (temp1_buf[1] == 'P') && (temp1_buf[2] == 'R') && (temp1_buf[3] == 'M') && (temp1_buf[4] == 'C'))
{
recv1_step=STAGE_NONE; //跳转到下一步
record1=0;
}
else
{
recv1_step=STAGE_SOHE;//恢复初始化
record1=0;
}
}
}
break;
case STAGE_NONE: if(rev1_buf_busy == 0x00)//接收命令格式：$GPRMC,054347.00,A,3202.04770,N,11846.23632,E,0.000,0.00,221013,,,A*67
{
rev1_buf_busy=0x01;
record1++;
if((record1 > 0x01) && (record1 < 0x08))
{
gps_infor_time[record1-2]=uart1_r_buf; //时间存储
}
if((uart1_r_buf == ',') && (record1 > 0x07) && (record1 < 0x010)) //||((uart1_r_buf == ',') && (record1==0x02))
{
record1=0xcc;
}
if(record1 == 0xcd)
{
record1=0;
devide_flag=2;
speed_end=0x00;
dir_end=0x00;
if(uart1_r_buf == 'A') //gps收到数据且有效
{
recv1_step=STAGE_DATA; //跳转到下一步
}
else
{
sysmode_GPS=0;
recv1_step=STAGE_SOHE; //无效恢复初始化
record1=0;
}
}
}
break;
case STAGE_DATA: if(rev1_buf_busy == 0x00)
{
rev1_buf_busy=0x01;
record1++;
if(uart1_r_buf == ',') //判断逗号
{
devide_flag++; //逗号次数记录
record1=0;
}
if(devide_flag == 3)
{
if((record1 > 0) && (record1 < 5))
{
gps_infor_weijing[record1-1]=uart1_r_buf; //存储经纬度此处为纬度
}
if((record1 > 5) && (record1 < 10)) //跳过小数点的存储
{
gps_infor_weijing[record1-2]=uart1_r_buf; //存储经纬度此处为纬度
}
}
if(devide_flag == 4)
{
if(record1 > 0)
{
ns_flag=uart1_r_buf; //接收纬度NS标志
}
}
if(devide_flag == 5)
{
if((record1 > 0) && (record1 < 6))
{
gps_infor_weijing[record1+7]=uart1_r_buf; //存储经纬度此处为纬度
}
if((record1 > 6) && (record1 < 11)) //跳过小数点的存储
{
gps_infor_weijing[record1+6]=uart1_r_buf; //存储经纬度此处为经度
}
}
if(devide_flag == 6)
{
if(record1 > 0)
{
ew_flag=uart1_r_buf; //经度度 EW标志
}
}
if(devide_flag == 7)
{
if(speed_end == 0x00)
{
if((record1 > 0) && (uart1_r_buf != '.'))
{
gps_infor_speed[record1-1]=uart1_r_buf; //接收速率
}
else if(uart1_r_buf == '.')
{
record1--;
speed_end=0xff;
}
}
else if(speed_end == 0xff)
{
speed_end=0xfe;
gps_infor_speed[record1-1]=uart1_r_buf;
gps_infor_speed[3]=gps_infor_speed[record1-1];
gps_infor_speed[2]=gps_infor_speed[record1-2];
if(record1 > 2)
{
gps_infor_speed[1]=gps_infor_speed[record1-3];
}
else
{
gps_infor_speed[1]=0x30;
}
if(record1 > 3)
{
gps_infor_speed[0]=gps_infor_speed[record1-4];
}
else
{
gps_infor_speed[0]=0x30;
}
}
}
if(devide_flag == 8)
{
if(dir_end == 0x00)
{
if((record1 > 0) && (uart1_r_buf != '.'))
{
gps_infor_dir[record1-1]=uart1_r_buf; //存储方向
}
else if(uart1_r_buf == '.')
{
record1--;
dir_end=0xff;
}
}
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