First Commit

libraries/SdFat/examples/examplesV1/#attic/AnalogLogger/AnalogLogger.ino

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+// A simple data logger for the Arduino analog pins with optional DS1307
+// uses RTClib from https://github.com/adafruit/RTClib
+#include <SPI.h>
+#include "SdFat.h"
+#include "sdios.h"
+#include "FreeStack.h"
+
+#define SD_CHIP_SELECT  SS  // SD chip select pin
+#define USE_DS1307       0  // set nonzero to use DS1307 RTC
+#define LOG_INTERVAL  1000  // mills between entries
+#define SENSOR_COUNT     3  // number of analog pins to log
+#define ECHO_TO_SERIAL   1  // echo data to serial port if nonzero
+#define WAIT_TO_START    1  // Wait for serial input in setup()
+#define ADC_DELAY       10  // ADC delay for high impedence sensors
+
+// file system object
+SdFat sd;
+
+// text file for logging
+ofstream logfile;
+
+// Serial print stream
+ArduinoOutStream cout(Serial);
+
+// buffer to format data - makes it eaiser to echo to Serial
+char buf[80];
+//------------------------------------------------------------------------------
+#if SENSOR_COUNT > 6
+#error SENSOR_COUNT too large
+#endif  // SENSOR_COUNT
+//------------------------------------------------------------------------------
+// store error strings in flash to save RAM
+#define error(s) sd.errorHalt(F(s))
+//------------------------------------------------------------------------------
+#if USE_DS1307
+// use RTClib from Adafruit
+// https://github.com/adafruit/RTClib
+
+// The Arduino IDE has a bug that causes Wire and RTClib to be loaded even
+// if USE_DS1307 is false.
+
+#error remove this line and uncomment the next two lines.
+//#include <Wire.h>
+//#include <RTClib.h>
+RTC_DS1307 RTC;  // define the Real Time Clock object
+//------------------------------------------------------------------------------
+// call back for file timestamps
+void dateTime(uint16_t* date, uint16_t* time) {
+  DateTime now = RTC.now();
+
+  // return date using FAT_DATE macro to format fields
+  *date = FAT_DATE(now.year(), now.month(), now.day());
+
+  // return time using FAT_TIME macro to format fields
+  *time = FAT_TIME(now.hour(), now.minute(), now.second());
+}
+//------------------------------------------------------------------------------
+// format date/time
+ostream& operator << (ostream& os, DateTime& dt) {
+  os << dt.year() << '/' << int(dt.month()) << '/' << int(dt.day()) << ',';
+  os << int(dt.hour()) << ':' << setfill('0') << setw(2) << int(dt.minute());
+  os << ':' << setw(2) << int(dt.second()) << setfill(' ');
+  return os;
+}
+#endif  // USE_DS1307
+//------------------------------------------------------------------------------
+void setup() {
+  Serial.begin(9600);
+
+  // Wait for USB Serial.
+  while (!Serial) {
+    yield();
+  }
+  // F() stores strings in flash to save RAM
+  cout << endl << F("FreeStack: ") << FreeStack() << endl;
+
+#if WAIT_TO_START
+  cout << F("Type any character to start\n");
+  while (!Serial.available()) {
+    yield();
+  }
+  // Discard input.
+  do {
+    delay(10);
+  } while(Serial.available() && Serial.read() >= 0);
+#endif  // WAIT_TO_START
+
+#if USE_DS1307
+  // connect to RTC
+  Wire.begin();
+  if (!RTC.begin()) {
+    error("RTC failed");
+  }
+
+  // set date time callback function
+  SdFile::dateTimeCallback(dateTime);
+  DateTime now = RTC.now();
+  cout  << now << endl;
+#endif  // USE_DS1307
+
+  // Initialize at the highest speed supported by the board that is
+  // not over 50 MHz. Try a lower speed if SPI errors occur.
+  if (!sd.begin(SD_CHIP_SELECT, SD_SCK_MHZ(50))) {
+    sd.initErrorHalt();
+  }
+
+  // create a new file in root, the current working directory
+  char name[] = "logger00.csv";
+
+  for (uint8_t i = 0; i < 100; i++) {
+    name[6] = i/10 + '0';
+    name[7] = i%10 + '0';
+    if (sd.exists(name)) {
+      continue;
+    }
+    logfile.open(name);
+    break;
+  }
+  if (!logfile.is_open()) {
+    error("file.open");
+  }
+
+  cout << F("Logging to: ") << name << endl;
+  cout << F("Type any character to stop\n\n");
+
+  // format header in buffer
+  obufstream bout(buf, sizeof(buf));
+
+  bout << F("millis");
+
+#if USE_DS1307
+  bout << F(",date,time");
+#endif  // USE_DS1307
+
+  for (uint8_t i = 0; i < SENSOR_COUNT; i++) {
+    bout << F(",sens") << int(i);
+  }
+  logfile << buf << endl;
+
+#if ECHO_TO_SERIAL
+  cout << buf << endl;
+#endif  // ECHO_TO_SERIAL
+}
+//------------------------------------------------------------------------------
+void loop() {
+  uint32_t m;
+
+  // wait for time to be a multiple of interval
+  do {
+    m = millis();
+  } while (m % LOG_INTERVAL);
+
+  // use buffer stream to format line
+  obufstream bout(buf, sizeof(buf));
+
+  // start with time in millis
+  bout << m;
+
+#if USE_DS1307
+  DateTime now = RTC.now();
+  bout << ',' << now;
+#endif  // USE_DS1307
+
+  // read analog pins and format data
+  for (uint8_t ia = 0; ia < SENSOR_COUNT; ia++) {
+#if ADC_DELAY
+    analogRead(ia);
+    delay(ADC_DELAY);
+#endif  // ADC_DELAY
+    bout << ',' << analogRead(ia);
+  }
+  bout << endl;
+
+  // log data and flush to SD
+  logfile << buf << flush;
+
+  // check for error
+  if (!logfile) {
+    error("write data failed");
+  }
+
+#if ECHO_TO_SERIAL
+  cout << buf;
+#endif  // ECHO_TO_SERIAL
+
+  // don't log two points in the same millis
+  if (m == millis()) {
+    delay(1);
+  }
+
+  if (!Serial.available()) {
+    return;
+  }
+  logfile.close();
+  cout << F("Done!");
+  while (true) {}
+}