124 lines
2.4 KiB
C++
124 lines
2.4 KiB
C++
//
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// FILE: ADS_continuous_differential.ino
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// AUTHOR: Rob.Tillaart
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// VERSION: 0.1.0
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// PURPOSE: read multiple differential continuously
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//
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// test
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// connect 4 potmeters
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//
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// GND ---[ x ]------ 5V
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// |
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//
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// measure at x - connect to AIN0..4.
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//
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//
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#include "ADS1X15.h"
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// choose you sensor
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// ADS1013 ADS(0x48);
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// ADS1014 ADS(0x48);
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// ADS1015 ADS(0x48);
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// ADS1113 ADS(0x48);
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// ADS1114 ADS(0x48);
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ADS1115 ADS(0x48);
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// interrupt flag
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volatile bool RDY = false;
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// which pair to use for differential
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uint8_t pair = 01;
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// two values to hold differential measurements.
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int16_t val_01 = 0;
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int16_t val_23 = 0;
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void setup()
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{
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Serial.begin(115200);
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Serial.println(__FILE__);
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Serial.print("ADS1X15_LIB_VERSION: ");
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Serial.println(ADS1X15_LIB_VERSION);
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// SET INTERRUPT HANDLER TO CATCH CONVERSION READY
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pinMode(2, INPUT_PULLUP);
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attachInterrupt(digitalPinToInterrupt(2), adsReady, RISING);
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ADS.begin();
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Serial.print("connected: ");
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Serial.println(ADS.isConnected());
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ADS.setGain(0); // 6.144 volt
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ADS.setDataRate(0); // 0 = slow 4 = medium 7 = fast (7 = fails )
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// every step is about a factor 2 slower.
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// SET ALERT RDY PIN
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ADS.setComparatorThresholdHigh(0x8000);
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ADS.setComparatorThresholdLow(0x0000);
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ADS.setComparatorQueConvert(0);
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// continuous mode
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ADS.setMode(0);
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// start with first pair
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pair = 01;
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// trigger first read
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ADS.requestADC_Differential_0_1();
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}
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void loop()
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{
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static uint32_t last = 0;
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if (handleConversion() == true)
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{
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uint32_t now = millis();
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Serial.print(now - last);
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last = now;
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Serial.print("\tCOMP:\t");
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Serial.print(val_01);
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Serial.print("\t");
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Serial.print(val_23);
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Serial.println();
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}
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// do other stuff here
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// delay(10);
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}
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// interrupt handler, just sets the RDY flag
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void adsReady()
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{
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RDY = true;
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}
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// can be changed to hold other differentials or normal reads too.
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bool handleConversion()
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{
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if (RDY)
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{
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RDY = false;
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if (pair == 01)
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{
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val_01 = ADS.getValue();
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pair = 23;
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ADS.requestADC_Differential_2_3();
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return false; // only one done
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}
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// last of series to check
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if (pair == 23)
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{
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val_23 = ADS.getValue();
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pair = 01;
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ADS.requestADC_Differential_0_1();
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return true; // both are updated
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}
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}
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return false; // default not all read
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}
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// -- END OF FILE --
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