mirror of
https://github.com/xreef/PCF8574_library.git
synced 2024-08-30 18:12:18 +00:00
41 lines
831 B
C++
41 lines
831 B
C++
#include "Arduino.h"
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#include "PCF8574.h"
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// For arduino uno only pin 1 and 2 are interrupted
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#define ARDUINO_UNO_INTERRUPTED_PIN 2
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// Function interrupt
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void keyPressedOnPCF8574();
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// Set i2c address
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PCF8574 pcf8574(0x39, ARDUINO_UNO_INTERRUPTED_PIN, keyPressedOnPCF8574);
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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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timeElapsed = millis();
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}
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bool keyPressed = false;
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void loop()
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{
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if (keyPressed){
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uint8_t val = pcf8574.digitalRead(P1);
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Serial.print("READ VALUE FROM PCF ");
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Serial.println(val);
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keyPressed= false;
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}
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}
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void keyPressedOnPCF8574(){
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// Interrupt called (No Serial no read no wire in this function, and DEBUG disabled on PCF library)
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keyPressed = true;
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}
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