Intel Galileo 连接GPS模块失败

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2007zoz

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1^# 发表于 2015-04-20 19:25:16

小弟我最近在做用Intel Galileo 开发板接收GPS模块数据，但是就是无法接收到数据，Serial.available()一直为0。GPS发送的数据为ASCII码。求各位大神救救我啊，万分感激。程序如下：

[C++] 纯文本查看复制代码

									#include <string.h>
								
									#include <ctype.h>
								
									intledPin = 13;                 // LED test pin
								
									intrxPin = 0;                   // RX PIN
								
									inttxPin = 1;                   // TX TX
								
									intbyteGPS=-1;
								
									charlinea[300] ="";
								
									charcomandoGPR[7] ="$GPRMC";
								
									intcont=0;
								
									intbien=0;
								
									intconta=0;
								
									intindices[13];
								
									voidsetup() {
								
									   pinMode(ledPin, OUTPUT);      // Initialize LED pin
								
									   pinMode(rxPin, INPUT);
								
									   pinMode(txPin, OUTPUT);
								
									   Serial.begin(38400);
								
									   for(inti=0;i<300;i++){      // Initialize a buffer for received data
								
									     linea=' ';
								
									   }  
								
									}
								
									voidloop()
								
									{
								
									   if(Serial.available()){
								
									   digitalWrite(ledPin, HIGH);
								
									   delay(100);
								
									   digitalWrite(ledPin, LOW);
								
									   delay(100);
								
									   byteGPS=Serial.read();
								
									   }  // Read a byte of the serial port
								
									   if(byteGPS == -1) {          // See if the port is empty yet
								
									     delay(100);
								
									   }else{
								
									     // note: there is a potential buffer overflow here!
								
									     linea[conta]=byteGPS;       // If there is serial port data, it is put in the buffer
								
									     conta++;                     
								
									     Serial.write(byteGPS);
								
									     if(byteGPS==13){           // If the received byte is = to 13, end of transmission
								
									       // note: the actual end of transmission is <CR><LF> (i.e. 0x13 0x10)
								
									       digitalWrite(ledPin, LOW);
								
									       cont=0;
								
									       bien=0;
								
									       // The following for loop starts at 1, because this code is clowny and the first byte is the <LF> (0x10) from the previous transmission.
								
									       for(inti=1;i<7;i++){    // Verifies if the received command starts with $GPR
								
									         if(linea==comandoGPR[i-1]){
								
									           bien++;
								
									         }
								
									       }
								
									       if(bien==6){              // If yes, continue and process the data
								
									         for(inti=0;i<300;i++){
								
									           if(linea==','){   // check for the position of the  "," separator
								
									             // note: again, there is a potential buffer overflow here!
								
									             indices[cont]=i;
								
									             cont++;
								
									           }
								
									           if(linea=='*'){   // ... and the "*"
								
									             indices[12]=i;
								
									             cont++;
								
									           }
								
									         }
								
									         Serial.println("");     // ... and write to the serial port
								
									         Serial.println("");
								
									         Serial.println("---------------");
								
									         for(inti=0;i<12;i++){
								
									           switch(i){
								
									             case0 :Serial.print("Time in UTC (HhMmSs): ");break;
								
									             case1 :Serial.print("Status (A=OK,V=KO): ");break;
								
									             case2 :Serial.print("Latitude: ");break;
								
									             case3 :Serial.print("Direction (N/S): ");break;
								
									             case4 :Serial.print("Longitude: ");break;
								
									             case5 :Serial.print("Direction (E/W): ");break;
								
									             case6 :Serial.print("Velocity in knots: ");break;
								
									             case7 :Serial.print("Heading in degrees: ");break;
								
									             case8 :Serial.print("Date UTC (DdMmAa): ");break;
								
									             case9 :Serial.print("Magnetic degrees: ");break;
								
									             case10 :Serial.print("(E/W): ");break;
								
									             case11 :Serial.print("Mode: ");break;
								
									             case12 :Serial.print("Checksum: ");break;
								
									           }
								
									           for(intj=indices;j<(indices[i+1]-1);j++){
								
									             Serial.print(linea[j+1]);
								
									           }
								
									           Serial.println("");
								
									         }
								
									         Serial.println("---------------");
								
									       }
								
									       conta=0;                   // Reset the buffer
								
									       for(inti=0;i<300;i++){   // 
								
									         linea=' ';            
								
									       }                
								
									     }
								
									   }
								
									}

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Intel Galileo 连接GPS模块失败

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