| 0,0 → 1,207 |
|---|
| /* |
| SD card datalogger GPSRL04A |
| |
| The circuit: |
| * analog sensors are connected to analog ins PC0, PC1 |
| * SD card attached to SPI bus as follows: |
| ** MOSI - pin PB3 |
| ** MISO - pin PB4 |
| ** CLK - pin PB5 |
| ** CS - pin PD4 |
| |
| */ |
| |
| #include <SD.h> |
| |
| const int chipSelect = 4; // CS is PD4 |
| int LED = 5; // LED is conected from PD5 to LED at GPS module |
| unsigned int n = 0; // measurement counter |
| char inChar; // input character from GPS |
| String dataString = ""; // concantenated string with NMEA messages and measured values |
| String filename = "log.csv"; // generated filename for log file |
| int coll = 0; // collons counter in NMEA messages |
| |
| void setup() |
| { |
| // Open serial communications and wait for port to open: |
| Serial.begin(9600); |
| while (!Serial) {;} |
| |
| Serial.print("Initializing SD card..."); // inserting a SD Card always reset the processor and call setup |
| // make sure that the default chip select pin is set to |
| // output, even if you don't use it: |
| pinMode(10, OUTPUT); // PB2 |
| pinMode(LED, OUTPUT); |
| |
| // see if the card is present and can be initialized: |
| if (!SD.begin(chipSelect)) |
| { |
| Serial.println("Card failed, or not present"); |
| for(n=0; n<10; n++) |
| { |
| digitalWrite(LED, HIGH); // turn the LED on (HIGH is the voltage level) |
| delay(2000); // wait for a while |
| digitalWrite(LED, LOW); // turn the LED off by making the voltage LOW |
| delay(100); |
| } |
| asm volatile (" jmp 0"); |
| // don't do anything more: |
| return; |
| } |
| Serial.println("card initialized."); |
| |
| dataString = ""; |
| ReadGPRMC(); // read time from GPS |
| if (dataString[10]!='A') |
| { |
| Serial.println("no fix"); |
| for(n=0; n<10; n++) |
| { |
| digitalWrite(LED, HIGH); // turn the LED on (HIGH is the voltage level) |
| delay(20); // wait for a while |
| digitalWrite(LED, LOW); // turn the LED off by making the voltage LOW |
| delay(20); |
| } |
| asm volatile (" jmp 0"); |
| // don't do anything more: |
| } |
| |
| // derive file name fom time (YYMMDDHH.CSV) |
| int len = dataString.length()-1; |
| filename = dataString.substring(len-2,len) + dataString.substring(len-4,len-2) + dataString.substring(len-6,len-4) + dataString.substring(0,2) + ".CSV "; |
| } |
| |
| void loop() |
| { |
| dataString = ""; // make a string for assembling the data to log |
| ReadGPRMC(); // read NMEA sentences from GPS |
| ReadGPGGA(); |
| |
| digitalWrite(LED, HIGH); // turn the LED on (HIGH is the voltage level) |
| delay(20); // wait for a while |
| digitalWrite(LED, LOW); // turn the LED off by making the voltage LOW |
| delay(20); // wait for a while |
| |
| // make a string for assembling the data to log: |
| dataString += String(n++); |
| dataString += ","; |
| |
| // read analog values from sensors and append to the string: |
| for (int analogPin = 0; analogPin < 2; analogPin++) |
| { |
| int sensor = analogRead(analogPin); |
| dataString += String(sensor); |
| if (analogPin < 1) // suppress last coma |
| { |
| dataString += ","; |
| } |
| } |
| |
| // open the file. note that only one file can be open at a time, |
| // so you have to close this one before opening another. |
| char fileNameCharArray[filename.length()]; |
| filename.toCharArray(fileNameCharArray, filename.length()); |
| File dataFile = SD.open(fileNameCharArray, FILE_WRITE); |
| |
| // if the file is available, write to it: |
| if (dataFile) |
| { |
| dataFile.println(dataString); |
| dataFile.close(); |
| // print to the serial port too: |
| Serial.println(dataString); |
| } |
| // if the file isn't open, pop up an error: |
| else { |
| Serial.println("error opening datalog.CSV"); |
| for(n=0; n<10; n++) |
| { |
| digitalWrite(LED, HIGH); // turn the LED on (HIGH is the voltage level) |
| delay(20); // wait for a while |
| digitalWrite(LED, LOW); // turn the LED off by making the voltage LOW |
| delay(20); |
| } |
| asm volatile (" jmp 0"); |
| // don't do anything more: |
| |
| } |
| } |
| |
| |
| // function for reading $GPRMC NMEA message |
| void ReadGPRMC() |
| { |
| // $GPRMC,091451.00,A,4915.64143,N,01441.50397,E,0.053,,090215,,,A*74 |
| |
| coll = 0; |
| |
| while(1) // wait for $GPRMC |
| { |
| // get incoming byte: |
| while (!Serial.available()); |
| if (Serial.read() != '$') continue; |
| while (!Serial.available()); |
| if (Serial.read() != 'G') continue; |
| while (!Serial.available()); |
| if (Serial.read() != 'P') continue; |
| while (!Serial.available()); |
| if (Serial.read() != 'R') continue; |
| while (!Serial.available()); |
| if (Serial.read() != 'M') continue; |
| while (!Serial.available()); |
| if (Serial.read() != 'C') continue; |
| while (!Serial.available()); |
| if (Serial.read() != ',') continue; |
| break; |
| } |
| |
| do |
| { |
| while (!Serial.available()); |
| inChar = (char)Serial.read(); |
| if (inChar == ',') coll++; |
| dataString += inChar; |
| } |
| while (coll < 9); // read only 9 coma separated values |
| } |
| |
| |
| // function for reading $GPGGA NMEA message |
| void ReadGPGGA() |
| { |
| // $GPGGA,091451.00,4915.64143,N,01441.50397,E,1,09,0.90,443.2,M,44.0,M,,*50 |
| |
| coll = 0; |
| |
| while(1) // wait for $GPGGA |
| { |
| while (!Serial.available()); |
| if (Serial.read() != '$') continue; |
| while (!Serial.available()); |
| if (Serial.read() != 'G') continue; |
| while (!Serial.available()); |
| if (Serial.read() != 'P') continue; |
| while (!Serial.available()); |
| if (Serial.read() != 'G') continue; |
| while (!Serial.available()); |
| if (Serial.read() != 'G') continue; |
| while (!Serial.available()); |
| if (Serial.read() != 'A') continue; |
| while (!Serial.available()); |
| if (Serial.read() != ',') continue; |
| break; |
| } |
| |
| do |
| { |
| while (!Serial.available()); |
| inChar = (char)Serial.read(); |
| if (inChar == ',') coll++; |
| if (coll > 4) dataString += inChar; // skip first 5 coma separated values |
| } |
| while (coll < 12); // read only 7 coma separated values |
| } |
| |
| |
| |
| |