diff options
| -rw-r--r-- | examples/Alert_Window_Mode_with_Latch/Alert_Window_Mode_with_Latch.ino | 156 |
1 files changed, 155 insertions, 1 deletions
diff --git a/examples/Alert_Window_Mode_with_Latch/Alert_Window_Mode_with_Latch.ino b/examples/Alert_Window_Mode_with_Latch/Alert_Window_Mode_with_Latch.ino index 8b13789..0ca337d 100644 --- a/examples/Alert_Window_Mode_with_Latch/Alert_Window_Mode_with_Latch.ino +++ b/examples/Alert_Window_Mode_with_Latch/Alert_Window_Mode_with_Latch.ino @@ -1 +1,155 @@ - +/***************************************************************************
+* Example sketch for the ADS1115_WE library
+*
+* This sketch shows how you can use the alert pin with the latch function. The
+* only difference to Alert_Window_Mode.ino is that latch is enabled (line 112)
+* and that the alert pin needs to be unlatched (line 148). Try and see the difference.
+* As an alternative to the unlatchAlertPin function you can use getResult_V.
+* Internally unlatchAlertPin just performs a read of the conversion register.
+*
+* Further information can be found on:
+* https://wolles-elektronikkiste.de/ads1115
+*
+***************************************************************************/
+
+#include<ADS1115_WE.h>
+#include<Wire.h>
+#define I2C_ADDRESS 0x48
+volatile int interruptPin = 2;
+int ledPin = 10;
+volatile bool outOfLimit = false;
+
+ADS1115_WE adc(I2C_ADDRESS);
+// ADS1115_WE adc = ADS1115_WE(); // Alternative: sets default address 0x48
+
+void setup() {
+ Wire.begin();
+ Serial.begin(9600);
+
+ pinMode(interruptPin, INPUT_PULLUP);
+ pinMode(ledPin, OUTPUT);
+ digitalWrite(ledPin, LOW);
+
+ if(!adc.init()){
+ Serial.println("ADS1115 not connected!");
+ }
+
+ /* Set the voltage range of the ADC to adjust the gain
+ * Please note that you must not apply more than VDD + 0.3V to the input pins!
+ *
+ * ADS1115_RANGE_6144 -> +/- 6144 mV
+ * ADS1115_RANGE_4096 -> +/- 4096 mV
+ * ADS1115_RANGE_2048 -> +/- 2048 mV (default)
+ * ADS1115_RANGE_1024 -> +/- 1024 mV
+ * ADS1115_RANGE_0512 -> +/- 512 mV
+ * ADS1115_RANGE_0256 -> +/- 256 mV
+ */
+ adc.setVoltageRange_mV(ADS1115_RANGE_6144); //comment line/change paramater to change range
+
+ /* Set the inputs to be compared
+ *
+ * ADS1115_COMP_0_1 -> compares 0 with 1 (default)
+ * ADS1115_COMP_0_3 -> compares 0 with 3
+ * ADS1115_COMP_1_3 -> compares 1 with 3
+ * ADS1115_COMP_2_3 -> compares 2 with 3
+ * ADS1115_COMP_0_GND -> compares 0 with GND
+ * ADS1115_COMP_1_GND -> compares 1 with GND
+ * ADS1115_COMP_2_GND -> compares 2 with GND
+ * ADS1115_COMP_3_GND -> compares 3 with GND
+ */
+ adc.setCompareChannels(ADS1115_COMP_0_GND); //uncomment if you want to change the default
+
+ /* Set number of conversions out of limit after which the alert pin will be active
+ * - or you can disable the alert (including conversion ready alert)
+ *
+ * ADS1115_ASSERT_AFTER_1 -> after 1 conversion
+ * ADS1115_ASSERT_AFTER_2 -> after 2 conversions
+ * ADS1115_ASSERT_AFTER_3 -> after 3 conversions
+ * ADS1115_DISABLE_ALERT -> disable comparator / alert pin (default)
+ */
+ adc.setAlertPinMode(ADS1115_ASSERT_AFTER_1); // you can also choose ...AFTER_2 or 3 for this sketch
+
+ /* Set the conversion rate in SPS (samples per second)
+ * Options should be self-explaining:
+ *
+ * ADS1115_8_SPS
+ * ADS1115_16_SPS
+ * ADS1115_32_SPS
+ * ADS1115_64_SPS
+ * ADS1115_128_SPS (default)
+ * ADS1115_250_SPS
+ * ADS1115_475_SPS
+ * ADS1115_860_SPS
+ */
+ //adc.setConvRate(ADS1115_8_SPS); //uncomment if you want to change the default
+
+ /* Set continous or single shot mode:
+ *
+ * ADS1115_CONTINOUS -> continous mode
+ * ADS1115_SINGLE -> single shot mode (default)
+ */
+ adc.setMeasureMode(ADS1115_CONTINOUS); //comment or change if you want to change single shot
+
+ /* Choose maximum limit or maxium and minimum alert limit (window)in Volt - alert pin will
+ * be active when measured values are beyond the maximum limit or outside the window
+ * Upper limit first: setAlertLimit_V(MODE, maximum, minimum)
+ * In max limit mode the minimum value is the limit where the alert pin will be deactivated
+ * again (if not latched!)
+ *
+ * ADS1115_MAX_LIMIT
+ * ADS1115_WINDOW
+ *
+ */
+ adc.setAlertModeAndLimit_V(ADS1115_WINDOW, 3.0, 1.5); //uncomment if you want to change the default
+
+ /* Enable or disable latch. If latch is enabled the alarm pin will be active until the
+ * conversion register is read (getResult functions). If disabled the alarm pin will be
+ * deactivated with next value within limits.
+ *
+ * ADS1115_LATCH_DISABLED (default)
+ * ADS1115_LATCH_ENABLED
+ */
+ adc.setAlertLatch(ADS1115_LATCH_ENABLED); //uncomment if you want to change the default
+
+ /* Sets the alert pin polarity if active:
+ *
+ * /* Enable or disable latch. If latch is enabled the alarm pin will be active until the
+ * conversion register is read (getResult functions). If disabled the alarm pin will be
+ * deactivated with next value within limits.
+ *
+ * ADS1115_ACT_LOW -> active low (default)
+ * ADS1115_ACT_HIGH -> active high
+ */
+ //adc.setAlertPol(ADS1115_ACT_LOW); //uncomment if you want to change the default
+
+ /* With this function the alert pin will be active, when a conversion is ready.
+ * In order to deactivate, use the setAlertLimit_V function
+ */
+ //adc.setAlertPinToConversionReady(); //uncomment if you want to change the default
+
+ Serial.println("ADS1115 Example Sketch - uses the Alert Pin / Window Mode / Latch enabled");
+ Serial.println();
+ Serial.println("Waiting for Value out of Limit");
+ attachInterrupt(digitalPinToInterrupt(interruptPin), outOfLimitAlert, FALLING);
+ adc.startSingleMeasurement();
+}
+
+void loop() {
+ float voltage = 0.0;
+ if(outOfLimit){
+ voltage = adc.getResult_V();
+ Serial.print("Voltage [V]: ");
+ Serial.println(voltage);
+ digitalWrite(ledPin,HIGH);
+ delay(1000);
+ digitalWrite(ledPin,LOW);
+ outOfLimit = false;
+ attachInterrupt(digitalPinToInterrupt(interruptPin), outOfLimitAlert, FALLING);
+ adc.unlatchAlertPin(); // unlatches the alert Pin (alternatively use getResult_V)
+ }
+}
+
+void outOfLimitAlert(){
+ detachInterrupt(2);
+ outOfLimit = true;
+}
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