51单片机GPS定位12864显示程序与原理图 -

#include "STC12C5A.H"
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "uart.h"
#include "timer0.h"
#include "key.h"
#include "lcd12864.h"
#include "GPS.h"
#include "GPS_PacketQueue.h"
extern unsigned long Timer0_Count; // 系统时基
unsigned char Display_Flag = 0; // 显示界面(0 - 时间经纬度,1 - 速度等)
unsigned char xdata DateTime[7] = {0}; // 时间和日期缓冲:秒,时,分,日,月,星期,年
/*-------------GPS相关变量-------- --------------------*/
GPS_INFO xdata GPS;
unsigned char GPS_Flag = 0; // GPS数据有效标志
// 函数声明
void LCD_Display_DateTime(unsigned char *pDataTime); // LCD显示时间,日期
void LCD_Display_Longitude_Latitude(GPS_INFO *GPS); // LCD显示经纬度
void LCD_Display_Speed(GPS_INFO *GPS); // LCD显示速度,航向等
/****************************************
主函数
/****************************************/
void main(void)
{
char key_value = 0;
struct timer Display_Time;
struct timer Flag_Time;
struct timer Error_Time;
GPS_PACKET *Packet = NULL;
memset(&GPS,0,sizeof(GPS)); // 一定要清0
timer_set(&Display_Time, CLOCK_SECOND/5); // 200ms
timer_set(&Error_Time, CLOCK_SECOND*2); // 2S
timer_set(&Flag_Time, CLOCK_SECOND*5); // 3S
LCD_Init();
GPS_PacketInit(); // 接收缓冲区初始化
UART_Init(); // 初始化UART
Timer0_Init(); // 启动定时器
while(1)
{
/* 处理GPS信号 */
Packet = NULL;
Packet = (GPS_PACKET *)GPS_GetPacket();
if( Packet ){
timer_restart(&Error_Time); // 接收正确更新时间
if(Packet->DataType == 1){
if(GPS_RMC_Parse(Packet->DataBuffer, &GPS)) // 解析GPRMC
{
memset(Packet,0,sizeof(GPS_PACKET));
DateTime[6] = GPS.D.year;
DateTime[4] = GPS.D.month;
DateTime[3] = GPS.D.day;
DateTime[2] = GPS.D.hour;
DateTime[1] = GPS.D.minute;
DateTime[0] = GPS.D.second;
GPS_Flag = 1;
}
else{ // 解析错误要清空缓冲区
memset(Packet,0,sizeof(GPS_PACKET));
}
}
else if(Packet->DataType == 2){
if(GPS_GGA_Parse(Packet->DataBuffer, &GPS)){
memset(Packet,0,sizeof(GPS_PACKET));
GPS_Flag = 1;
}
else{ // 解析错误要清空缓冲区
memset(Packet,0,sizeof(GPS_PACKET));
}
}
}
else{
// 接收错误,且时长超过100*20ms = 2S,复位硬件
if( timer_expired(&Error_Time) )
{
UART_Init();
GPS_PacketInit();
timer_restart(&Error_Time);
GPS_Flag = 0;
}
}
if( timer_expired(&Flag_Time) ) // 切换画面
{
Display_Flag = ++Display_Flag % 2;
LCD_Clear();
timer_reset(&Flag_Time);
}
if( timer_expired(&Display_Time) )
{
timer_reset(&Display_Time);
if(GPS_Flag == 0)
{
memset(DateTime,0,sizeof(DateTime));
memset(&GPS,0,sizeof(GPS));
}
if(Display_Flag == 0)
{
LCD_Display_DateTime(DateTime); // 时间显示
LCD_Display_Longitude_Latitude(&GPS);
}
else
{
LCD_Display_Speed(&GPS);
}
}
}
}
/*
日期和时间显示
*/
void LCD_Display_DateTime(unsigned char *pDataTime)
{
unsigned char temp_buffer[9] = {0};
// 显示年,月,日
temp_buffer[0] = pDataTime[6]/10+0x30;
temp_buffer[1] = pDataTime[6]%10+0x30;
Display_String(1,1,"20");
Display_String(2,1,temp_buffer);
Display_String(3,1,"年");
temp_buffer[0] = pDataTime[4]/10+0x30;
temp_buffer[1] = pDataTime[4]%10+0x30;
Display_String(4,1,temp_buffer);
Display_String(5,1,"月");
temp_buffer[0] = pDataTime[3]/10+0x30;
temp_buffer[1] = pDataTime[3]%10+0x30;
Display_String(6,1,temp_buffer);
temp_buffer[8] = '\0';
Display_String(7,1,"日");
// 显示时,分,秒
temp_buffer[0] = pDataTime[2]/10+0x30;
temp_buffer[1] = pDataTime[2]%10+0x30;
temp_buffer[2] = ':';
temp_buffer[3] = pDataTime[1]/10+0x30;
temp_buffer[4] = pDataTime[1]%10+0x30;
temp_buffer[5] = ':';
temp_buffer[6] = pDataTime[0]/10+0x30;
temp_buffer[7] = pDataTime[0]%10+0x30;
temp_buffer[8] = '\0';
Display_String(1,2,temp_buffer);
// 显示星期
switch(DateTime[5]%10 -1)
{
case 0: Display_String(6,2,"星期日\0");break;
case 1: Display_String(6,2,"星期一\0");break;
case 2: Display_String(6,2,"星期二\0");break;
case 3: Display_String(6,2,"星期三\0");break;
case 4: Display_String(6,2,"星期四\0");break;
case 5: Display_String(6,2,"星期五\0");break;
case 6: Display_String(6,2,"星期六\0");break;
default: break;
}
}
/*
显示纬度和经度
*/
void LCD_Display_Longitude_Latitude(GPS_INFO *GPS)
{
unsigned char ch, i;
char info[20];
if (GPS->NS == 'N') //判断是北纬还是南纬
{
Display_String(1,3,"北纬");
}
else if (GPS->NS == 'S')
{
Display_String(1,3,"南纬");
}
if (GPS->EW == 'E') //判断是东经还是西经
{
Display_String(1,4,"东经");
}
else if (GPS->EW == 'W')
{
Display_String(1,4,"西经");
}
sprintf(info,":%3d\0",GPS->latitude_Degree);
LCD_XY(3, 3);
i = 0;
while(info[i] != '\0')
{
ch = info[i++];
LCD_Write_Data(ch);
}
LCD_Write_Data(0xA1);
LCD_Write_Data(0xE3);
Int_To_Str(GPS->latitude_Cent, info);
i = 0;
while(info[i] != '\0')
{
ch = info[i++];
LCD_Write_Data(ch);
}
LCD_Write_Data(0xA1);
LCD_Write_Data(0xE4);
Int_To_Str(GPS->latitude_Second, info);
i = 0;
while(info[i] != '\0')
{
ch = info[i++];
LCD_Write_Data(ch);
}
sprintf(info,":%3d\0",GPS->longitude_Degree);
LCD_XY(3, 4);
i = 0;
while(info[i] != '\0')
{
ch = info[i++];
LCD_Write_Data(ch);
}
LCD_Write_Data(0xA1);
LCD_Write_Data(0xE3);
Int_To_Str(GPS->longitude_Cent, info);
i = 0;
while(info[i] != '\0')
{
ch = info[i++];
LCD_Write_Data(ch);
}
LCD_Write_Data(0xA1);
LCD_Write_Data(0xE4);
Int_To_Str(GPS->longitude_Second, info);
i = 0;
while(info[i] != '\0')
{
ch = info[i++];
LCD_Write_Data(ch);
}
}
/*
把浮点数fla显示在LCD的坐标(x,y)位置
*/
void Show_Float(float fla, unsigned char x, unsigned char y)
{
int integar;
char Info[10],ch;
unsigned char i;
LCD_XY(x, y);
integar = (int)fla; // 得到浮点数的整数部分
Int_To_Str(fla, Info);
i = 0;
while(Info[i] !='\0')
{
ch=Info[i++];
LCD_Write_Data(ch);
}
LCD_Write_Data('.');
fla = fla - integar; // 得到浮点数的小数部分
fla = fla * 10; // 小数位第一位
integar = (int)fla;
fla = fla - integar;
ch = integar + 0x30;
LCD_Write_Data(ch);
fla = fla*10; // 小数位第二位
integar = (int)fla;
fla = fla - integar;
ch = integar + 0x30 ;
LCD_Write_Data(ch);
}
/*
显示速度,航向,海拔
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