From b6c8af34d4451c03348a0aca892046d5e892c821 Mon Sep 17 00:00:00 2001 From: "Wolfgang (Wolle) Ewald" Date: Sat, 27 Jun 2020 13:15:26 +0200 Subject: Add files via upload --- .../Alert_Window_Mode_with_Latch.ino | 156 ++++++++++++++++++++- 1 file changed, 155 insertions(+), 1 deletion(-) 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 +#include +#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; +} -- cgit v1.2.3