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https://github.com/xreef/PCF8574_library.git
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Update to get the state of OUTPUT PINs, and a full encoder example
This commit is contained in:
Renzo Mischianti
parent
64772d744f
commit
d54594fbec
13
PCF8574.cpp
13
PCF8574.cpp
@ -491,6 +491,15 @@ void PCF8574::readBuffer(bool force){
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if ((bit(6) & readMode)>0) digitalInput.p6 = ((byteBuffered & bit(6))>0)?HIGH:LOW;
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if ((bit(7) & readMode)>0) digitalInput.p7 = ((byteBuffered & bit(7))>0)?HIGH:LOW;
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if ((bit(0) & writeMode)>0) digitalInput.p0 = ((writeByteBuffered & bit(0))>0)?HIGH:LOW;
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if ((bit(1) & writeMode)>0) digitalInput.p1 = ((writeByteBuffered & bit(1))>0)?HIGH:LOW;
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if ((bit(2) & writeMode)>0) digitalInput.p2 = ((writeByteBuffered & bit(2))>0)?HIGH:LOW;
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if ((bit(3) & writeMode)>0) digitalInput.p3 = ((writeByteBuffered & bit(3))>0)?HIGH:LOW;
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if ((bit(4) & writeMode)>0) digitalInput.p4 = ((writeByteBuffered & bit(4))>0)?HIGH:LOW;
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if ((bit(5) & writeMode)>0) digitalInput.p5 = ((writeByteBuffered & bit(5))>0)?HIGH:LOW;
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if ((bit(6) & writeMode)>0) digitalInput.p6 = ((writeByteBuffered & bit(6))>0)?HIGH:LOW;
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if ((bit(7) & writeMode)>0) digitalInput.p7 = ((writeByteBuffered & bit(7))>0)?HIGH:LOW;
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//if ((byteBuffered & readModePullDown)>0 and (~byteBuffered & readModePullUp)>0){
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byteBuffered = (resetInitial & readMode) | (byteBuffered & ~readMode); //~readMode & byteBuffered;
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DEBUG_PRINT("Buffer hight value readed set readed ");
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@ -524,7 +533,7 @@ void PCF8574::readBuffer(bool force){
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DEBUG_PRINT("Buffer value ");
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DEBUG_PRINTLN(byteBuffered, BIN);
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byte byteRead = byteBuffered;
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byte byteRead = byteBuffered | writeByteBuffered;
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//if ((byteBuffered & readModePullDown)>0 and (~byteBuffered & readModePullUp)>0){
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byteBuffered = (resetInitial & readMode) | (byteBuffered & ~readMode); //~readMode & byteBuffered;
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@ -597,6 +606,8 @@ uint8_t PCF8574::digitalRead(uint8_t pin, bool forceReadNow){
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byteBuffered = bit(pin) ^ byteBuffered;
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DEBUG_PRINT(" ...Buffer low value readed set readed ");
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DEBUG_PRINT(byteBuffered, BIN);
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}else if(bit(pin) & writeByteBuffered){
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value = HIGH;
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}
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DEBUG_PRINT(" ...Return value ");
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DEBUG_PRINTLN(value);
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@ -0,0 +1,81 @@
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/*
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* PCF8574 GPIO Port Expand
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* https://www.mischianti.org
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*
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* PCF8574 ----- WeMos
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* A0 ----- GRD
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* A1 ----- GRD
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* A2 ----- GRD
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* VSS ----- GRD
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* VDD ----- 5V/3.3V
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* SDA ----- D1(PullUp)
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* SCL ----- D2(PullUp)
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* INT ----- INT(PullUp)
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*
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* P0 ----------------- ENCODER PIN A
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* P1 ----------------- ENCODER PIN B
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* P2 ----------------- ENCODER BUTTON
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*
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*/
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#include "Arduino.h"
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#include "PCF8574.h"
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int encoderPinA = P0;
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int encoderPinB = P1;
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#define INTERRUPTED_PIN D7
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void ICACHE_RAM_ATTR updateEncoder();
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// initialize library
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PCF8574 pcf8574(0x38, INTERRUPTED_PIN, updateEncoder);
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volatile long encoderValue = 0;
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uint8_t encoderButtonVal = HIGH;
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void setup()
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{
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Serial.begin (9600);
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delay(500);
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// encoder pins
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pcf8574.encoder(encoderPinA, encoderPinB);
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// encoder button
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pcf8574.pinMode(P2, INPUT);
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// Start library
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pcf8574.begin();
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}
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bool changed = false;
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// The loop function is called in an endless loop
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void loop()
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{
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if (changed){
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Serial.print("ENCODER --> ");
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Serial.print(encoderValue);
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Serial.print(" - BUTTON --> ");
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Serial.println(encoderButtonVal?"HIGH":"LOW");
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changed = false;
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}
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}
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bool valPrecEncoderButton = LOW;
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void updateEncoder(){
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changed = pcf8574.readEncoderValue(encoderPinA, encoderPinB, &encoderValue);
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// int vale = pcf8574.readEncoderValue(encoderPinA, encoderPinB);
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// if (vale!=0){
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// changed = true;
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// }
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// encoderValue = encoderValue + vale;
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// Button management
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encoderButtonVal = pcf8574.digitalRead(P2);
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if (encoderButtonVal!=valPrecEncoderButton){
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changed = true; // Chnged the value of button
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valPrecEncoderButton = encoderButtonVal;
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}
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}
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66
resources/Article/mushroom.svg
Normal file
66
resources/Article/mushroom.svg
Normal file
@ -0,0 +1,66 @@
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After Width: | Height: | Size: 3.1 KiB |
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