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examples/ADS_read_comparator_1/ADS_read_comparator_1.ino

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+//
+//    FILE: ADS_read_comparator_1.ino
+//  AUTHOR: Rob.Tillaart
+// VERSION: 0.1.0
+// PURPOSE: read analog inputs - straightforward.
+//
+
+// test
+// connect 1 potmeter per port.
+//
+// GND ---[   x   ]------ 5V
+//            |
+//
+// measure at x (connect to AIN0).
+//
+// 
+// GND ---[LED]---[ALERT_PIN]---[ R ]--- 5V
+//
+// Connect a LED (+ resistor) to ALERT PIN
+// and see it trigger at configured way by the comparator.
+//
+
+
+#include "ADS1X15.h"
+
+ADS1115 ADS(0x48);
+
+void setup()
+{
+  Serial.begin(115200);
+  Serial.println(__FILE__);
+  Serial.print("ADS1X15_LIB_VERSION: ");
+  Serial.println(ADS1X15_LIB_VERSION);
+
+  ADS.begin();
+
+  // change if needed.
+  ADS.setComparatorMode(1);              // 0 = TRADITIONAL    1 = WINDOW
+
+  ADS.setComparatorPolarity(0);          // 0 = LOW (default)  1 = HIGH
+  
+  // note NON-LATCH gives only a short pulse
+  ADS.setComparatorLatch(1);             // 0 = NON LATCH      1 = LATCH
+
+  ADS.setComparatorQueConvert(0);        // 0 = trigger alert after 1 conversion
+
+  // set the thresholds as a number...
+  // ADS.setComparatorThresholdLow(5000);   // change if needed
+  // ADS.setComparatorThresholdHigh(20000); // change if needed
+
+  // set the threshold as a voltage by using the voltage factor.
+  float f = ADS.toVoltage(1);  // voltage factor
+  ADS.setComparatorThresholdLow(1.234 / f);   // convert volts to number needed
+  ADS.setComparatorThresholdHigh(3.142 / f);  // convert volts to number needed
+  
+  Serial.println(ADS.getComparatorThresholdLow());
+  Serial.println(ADS.getComparatorThresholdHigh());
+
+}
+
+void loop()
+{
+  ADS.setGain(0);
+
+  int16_t val_0 = ADS.readADC(0);
+
+  float f = ADS.toVoltage(1);  // voltage factor
+
+  Serial.print("\tAnalog0: ");
+  Serial.print(val_0);
+  Serial.print('\t');
+  Serial.print(val_0 * f, 3);
+  Serial.print('\t');
+  Serial.print(ADS.getComparatorThresholdLow() * f, 3);
+  Serial.print('\t');
+  Serial.print(ADS.getComparatorThresholdHigh() * f, 3);
+  Serial.println();
+
+  delay(100);
+}
+
+// -- END OF FILE --