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121 changes: 121 additions & 0 deletions
121
examples/ADS_continuous_3_channel/ADS_continuous_3_channel.ino
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,121 @@ | ||
| // | ||
| // FILE: ADS_continuous_3_channel.ino | ||
| // AUTHOR: Rob.Tillaart | ||
| // PURPOSE: read multiple analog inputs continuously | ||
| // interrupt driven to catch all conversions. | ||
| // URL: https://github.com/RobTillaart/ADS1X15 | ||
| // https://github.com/RobTillaart/ADS1X15/issues/49 | ||
| // | ||
| // experimental, not tested extensively | ||
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| // test | ||
| // connect multiple potmeters | ||
| // | ||
| // RDY ----------------- pin 2 (for IRQ) | ||
| // | ||
| // GND ---[ x ]------ 5V | ||
| // | | ||
| // | | ||
| // ADS(n) | ||
| // | ||
| // measure at x - connect to AIN0..3. | ||
| // | ||
| // for the test it is an option to have AIN3 connected to 5V and AIN4 to GND | ||
| // so one can see these as references in the output. | ||
| // | ||
| // has an issue with the index of the channels. not not investigated yet. | ||
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| #include "ADS1X15.h" | ||
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| // choose your sensor | ||
| // ADS1013 ADS(0x48); | ||
| // ADS1014 ADS(0x48); | ||
| // ADS1015 ADS(0x48); | ||
| // ADS1113 ADS(0x48); | ||
| // ADS1114 ADS(0x48); | ||
| ADS1115 ADS(0x48); | ||
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| volatile bool RDY = false; | ||
| uint8_t channel = 0; | ||
| int16_t val[4] = { 0, 0, 0, 0 }; | ||
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| int SPS = 0; | ||
| uint32_t lastTime = 0; | ||
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| void setup() | ||
| { | ||
| Serial.begin(230400); // <<<<<<<<< fast! | ||
| Serial.println(__FILE__); | ||
| Serial.print("ADS1X15_LIB_VERSION: "); | ||
| Serial.println(ADS1X15_LIB_VERSION); | ||
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| Wire.setClock(400000); | ||
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| ADS.begin(); | ||
| ADS.setGain(0); // 6.144 volt | ||
| ADS.setDataRate(7); // 0 = slow 4 = medium 7 = fast | ||
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| // SET ALERT RDY PIN | ||
| ADS.setComparatorThresholdHigh(0x8000); | ||
| ADS.setComparatorThresholdLow(0x0000); | ||
| ADS.setComparatorQueConvert(0); | ||
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| // SET INTERRUPT HANDLER TO CATCH CONVERSION READY | ||
| pinMode(2, INPUT_PULLUP); | ||
| attachInterrupt(digitalPinToInterrupt(2), adsReady, RISING); | ||
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| ADS.setMode(0); // continuous mode | ||
| channel = 0; | ||
| ADS.requestADC(channel); // start at 0 | ||
| } | ||
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| void loop() | ||
| { | ||
| // if conversion ready | ||
| // request a new one and print the last one. | ||
| if (RDY) | ||
| { | ||
| SPS++; | ||
| val[channel] = ADS.getValue(); | ||
| // request next channel asap | ||
| channel++; | ||
| if (channel >= 3) channel = 0; | ||
| ADS.requestADC(channel); | ||
| RDY = false; | ||
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| // to see it works | ||
| if (SPS % 200 == 0) | ||
| { | ||
| for (int i = 0; i < 4; i++) | ||
| { | ||
| Serial.print('\t'); | ||
| Serial.print(val[i]); | ||
| } | ||
| Serial.println(); | ||
| } | ||
| } | ||
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| // print the SPS | ||
| if (millis() - lastTime >= 1000) | ||
| { | ||
| lastTime = millis(); | ||
| Serial.print("SPS: "); | ||
| Serial.println(SPS); | ||
| SPS = 0; | ||
| } | ||
| } | ||
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| // interrupt service routine | ||
| // kept as minimal as possible | ||
| void adsReady() | ||
| { | ||
| RDY = true; | ||
| } | ||
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| // -- END OF FILE -- |
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