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#include<STC12C5A60S2.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define false 0
#define true 1
//定義數(shù)組長度
#define GPS_Buffer_Length 80
#define UTCTime_Length 11
#define latitude_Length 11
#define N_S_Length 2
#define longitude_Length 12
#define E_W_Length 2
#define gpsRxBufferLength 76
char idata gpsRxBuffer[gpsRxBufferLength];
unsigned char RX_Count;
//函數(shù)或者變量聲明
void Delay_ms(unsigned int n);
void printGpsBuffer();
void parseGpsBuffer();
void errorLog(int num);
void Uart_Init();
void UartPrintf(unsigned char *p);
void UartPrintASCII(unsigned char c);
void Uart_Init();
void UartPrintf(unsigned char *p);
void UartPrintASCII(unsigned char c);
extern void clrStruct();
struct SaveData
{
char GPS_Buffer[GPS_Buffer_Length];
char isGetData; //是否獲取到GPS數(shù)據(jù)
char isParseData; //是否解析完成
char UTCTime[UTCTime_Length]; //UTC時(shí)間
char latitude[latitude_Length]; //緯度
char N_S[N_S_Length]; //N/S
char longitude[longitude_Length]; //經(jīng)度
char E_W[E_W_Length]; //E/W
char isUsefull; //定位信息是否有效
} xdata Save_Data;
#define gpsRxBufferLength 76
char idata gpsRxBuffer[gpsRxBufferLength];
unsigned char RX_Count=0;
void main()
{
unsigned char i = 0;
Uart_Init();
Delay_ms(10);
[color=#ff0000]UartPrintf("Welcome to use!"); //測試串口是正確[/color]
[color=#ff0000] UartPrintf("ILoveMCU.taobao.com");[/color]
clrStruct(); //清空緩存數(shù)組
while(1)
{
parseGpsBuffer();
printGpsBuffer();
}
}
void Uart_Init()
{
SCON = 0X50; //UART方式1；8位UART
REN = 1; //允許串行口接收數(shù)據(jù)
PCON = 0x00; //SMOD=0;波特率不加倍
TMOD = 0x20; //T1方式2，用于產(chǎn)生波特率
TH1 = 0xFD; //裝初值
TL1 = 0xFD;
TR1 = 1; //啟動(dòng)定時(shí)器1
EA = 1; //打開全局中斷控制
ES = 1; //打開串行口中斷
}
void UartPrintf(unsigned char *p) //發(fā)送字符串
{
while(*p)
{
SBUF=*(p++);
while(TI==0)
{
};
TI=0;
}
}
void UartPrintASCII(unsigned char c) //發(fā)送一個(gè)字符
{
TI=0;
SBUF=c;
while(TI==0);
TI=0;
}
void RECEIVE_DATA(void) interrupt 4 using 3
{
unsigned char temp = 0;
char i = 0;
ES=0;
temp = SBUF;
RI = 0;
if(temp == ')
{
RX_Count = 0;
}
if(RX_Count <= 5)
{
gpsRxBuffer[RX_Count++] = temp;
}
else if(gpsRxBuffer[0] == ' &gpsRxBuffer[4] == 'M' && gpsRxBuffer[5] == 'C') //確定是否收到"GPRMC/GNRMC"這一幀數(shù)據(jù)
{
gpsRxBuffer[RX_Count++] = temp;
if(temp == '\n')
{
memset(Save_Data.GPS_Buffer, 0, GPS_Buffer_Length); //清空
memcpy(Save_Data.GPS_Buffer, gpsRxBuffer, RX_Count); //保存數(shù)據(jù)
Save_Data.isGetData = true;
RX_Count = 0;
memset(gpsRxBuffer, 0, gpsRxBufferLength); //清空
}
if(RX_Count >= 75)
{
RX_Count = 75;
gpsRxBuffer[RX_Count] = '\0';//添加結(jié)束符
}
}
ES=1;
}
void clrStruct()
{
Save_Data.isGetData = false;
Save_Data.isParseData = false;
Save_Data.isUsefull = false;
memset(Save_Data.GPS_Buffer, 0, GPS_Buffer_Length); //清空
memset(Save_Data.UTCTime, 0, UTCTime_Length);
memset(Save_Data.latitude, 0, latitude_Length);
memset(Save_Data.N_S, 0, N_S_Length);
memset(Save_Data.longitude, 0, longitude_Length);
memset(Save_Data.E_W, 0, E_W_Length);
}
void errorLog(int num)
{
while (1)
{
UartPrintf("ERROR");
UartPrintASCII(num+0x30);
UartPrintf("\r\n");
}
}
void parseGpsBuffer()
{
char *subString;
char *subStringNext;
char i = 0;
if (Save_Data.isGetData)
{
Save_Data.isGetData = false;
UartPrintf("**************\r\n");
UartPrintf(Save_Data.GPS_Buffer);
for (i = 0 ; i <= 6 ; i++)
{
if (i == 0)
{
if ((subString = strstr(Save_Data.GPS_Buffer, ",")) == NULL)
errorLog(1); //解析錯(cuò)誤
}
else
{
subString++;
if ((subStringNext = strstr(subString, ",")) != NULL)
{
char usefullBuffer[2];
switch(i)
{
case 1:memcpy(Save_Data.UTCTime, subString, subStringNext - subString);break; //獲取UTC時(shí)間
case 2:memcpy(usefullBuffer, subString, subStringNext - subString);break; //獲取UTC時(shí)間
case 3:memcpy(Save_Data.latitude, subString, subStringNext - subString);break; //獲取緯度信息
case 4:memcpy(Save_Data.N_S, subString, subStringNext - subString);break; //獲取N/S
case 5:memcpy(Save_Data.longitude, subString, subStringNext - subString);break; //獲取經(jīng)度信息
case 6:memcpy(Save_Data.E_W, subString, subStringNext - subString);break; //獲取E/W
default:break;
}
subString = subStringNext;
Save_Data.isParseData = true;
if(usefullBuffer[0] == 'A')
Save_Data.isUsefull = true;
else if(usefullBuffer[0] == 'V')
Save_Data.isUsefull = false;
}
else
{
errorLog(2); //解析錯(cuò)誤
}
}
}
}
}
void printGpsBuffer()
{
if (Save_Data.isParseData)
{
Save_Data.isParseData = false;
UartPrintf("Save_Data.UTCTime = ");
UartPrintf(Save_Data.UTCTime);
UartPrintf("\r\n");
if(Save_Data.isUsefull)
{
Save_Data.isUsefull = false;
UartPrintf("Save_Data.latitude = ");
UartPrintf(Save_Data.latitude);
UartPrintf("\r\n");
UartPrintf("Save_Data.N_S = ");
UartPrintf(Save_Data.N_S);
UartPrintf("\r\n");
UartPrintf("Save_Data.longitude = ");
UartPrintf(Save_Data.longitude);
UartPrintf("\r\n");
UartPrintf("Save_Data.E_W = ");
UartPrintf(Save_Data.E_W);
UartPrintf("\r\n");
}
else
{
UartPrintf("GPS DATA is not usefull!\r\n");
}
}
}
//****************************************************
//MS延時(shí)函數(shù)
//****************************************************
void Delay_ms(unsigned int n)
{
unsigned int i,j;
for(i=0;i<n;i++)
for(j=0;j<123;j++);
}

復(fù)制代碼