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30 lines
542 B
C++
30 lines
542 B
C++
/*
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KeyPressed on PIN1
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by Mischianti Renzo <http://www.mischianti.org>
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https://www.mischianti.org/2019/01/02/pcf8574-i2c-digital-i-o-expander-fast-easy-usage/
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*/
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#include "Arduino.h"
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#include "PCF8574.h"
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// Set i2c address
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PCF8574 pcf8574(0x39);
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unsigned long timeElapsed;
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void setup()
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{
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Serial.begin(115200);
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pcf8574.pinMode(P0, OUTPUT);
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pcf8574.pinMode(P1, INPUT);
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pcf8574.begin();
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}
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void loop()
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{
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uint8_t val = pcf8574.digitalRead(P1);
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if (val==HIGH) Serial.println("KEY PRESSED");
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delay(50);
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}
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