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0.3.3 PCF8574

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rob tillaart 2021-12-23 12:51:26 +01:00
parent 146ce589d0
commit 19952ad1ae
20 changed files with 200 additions and 106 deletions
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10
libraries/PCF8574/.arduino-ci.yml
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@ -2,6 +2,10 @@ compile:
# Choosing to run compilation tests on 2 different Arduino platforms
platforms:
- uno
- leonardo
- due
- zero
# - due
# - zero
# - leonardo
- m4
- esp32
# - esp8266
# - mega2560

10
libraries/PCF8574/.github/workflows/arduino_test_runner.yml vendored
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@ -4,10 +4,14 @@ name: Arduino CI
on: [push, pull_request]
jobs:
arduino_ci:
runTest:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
- uses: Arduino-CI/action@master
# Arduino-CI/action@v0.1.1
- uses: ruby/setup-ruby@v1
with:
ruby-version: 2.6
- run: |
gem install arduino_ci
arduino_ci.rb

2
libraries/PCF8574/LICENSE
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@ -1,6 +1,6 @@
MIT License
Copyright (c) 2013-2021 Rob Tillaart
Copyright (c) 2013-2022 Rob Tillaart
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal

35
libraries/PCF8574/PCF8574.cpp
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@ -2,15 +2,17 @@
// FILE: PCF8574.cpp
// AUTHOR: Rob Tillaart
// DATE: 02-febr-2013
// VERSION: 0.3.2
// VERSION: 0.3.3
// PURPOSE: Arduino library for PCF8574 - 8 channel I2C IO expander
// URL: https://github.com/RobTillaart/PCF8574
// http://forum.arduino.cc/index.php?topic=184800
//
// HISTORY:
//
// 0.3.3 2021-12-23 update library.json, license, readme, minor edits
// 0.3.2 2021-07-04 fix #25 add setAddress()
// 0.3.1 2021-04-23 Fix for platformIO compatibility
// 0.3.0 2021-01-03 multiWire support - inspirated by mattbue - issue #14
// 0.3.0 2021-01-03 multiWire support - inspired by mattbue - issue #14
// 0.2.4 2020-12-17 fix #6 tag problem 0.2.3
// 0.2.3 2020-12-14 fix #6 readButton8 ambiguity
// 0.2.2 2020-12-07 add Arduino-ci + start unit test + _wire->h in PCF8574.h
@ -19,9 +21,9 @@
// removed pre 1.0 support
// added begin(dsa, scl) for ESP32
// added reverse()
//
//
// 0.1.9 2017-02-27 fix warning about return in readButton8()
// 0.1.08 2016-05-20 Merged work of Septillion
// 0.1.08 2016-05-20 Merged work of Septillion
// Fix/refactor ButtonRead8() - see https://github.com/RobTillaart/Arduino/issues/38
// missing begin() => mask parameter
// 0.1.07 2016-05-02 (manually merged) Septillion
@ -36,7 +38,7 @@
// 0.1.05 2016-04-30 refactor, +toggleMask, +rotLeft, +rotRight
// 0.1.04 2015-05-09 removed ambiguity in read8()
// 0.1.03 2015-03-02 address int -> uint8_t
// 0.1.02 replaced ints with uint8_t to reduce footprint;
// 0.1.02 replaced integers with uint8_t to reduce footprint;
// added default value for shiftLeft() and shiftRight()
// renamed status() to lastError();
// 0.1.01 added value(); returns last read 8 bit value (cached);
@ -59,7 +61,7 @@ PCF8574::PCF8574(const uint8_t deviceAddress, TwoWire *wire)
#if defined (ESP8266) || defined(ESP32)
bool PCF8574::begin(uint8_t dataPin, uint8_t clockPin, uint8_t val)
bool PCF8574::begin(uint8_t dataPin, uint8_t clockPin, uint8_t value)
{
_wire = &Wire;
if ((dataPin < 255) && (clockPin < 255))
@ -69,17 +71,17 @@ bool PCF8574::begin(uint8_t dataPin, uint8_t clockPin, uint8_t val)
_wire->begin();
}
if (! isConnected()) return false;
PCF8574::write8(val);
PCF8574::write8(value);
return true;
}
#endif
bool PCF8574::begin(uint8_t val)
bool PCF8574::begin(uint8_t value)
{
_wire->begin();
if (! isConnected()) return false;
PCF8574::write8(val);
PCF8574::write8(value);
return true;
}
@ -104,11 +106,11 @@ uint8_t PCF8574::getAddress()
}
// removed _wire->beginTransmission(addr);
// with @100KHz -> 265 micros()
// without @100KHz -> 132 micros()
// without @400KHz -> 52 micros()
// TODO @800KHz -> ??
// removed _wire->beginTransmission(_address);
// with @100 KHz -> 265 micros()
// without @100 KHz -> 132 micros()
// without @400 KHz -> 52 micros()
// TODO @800 KHz -> ??
uint8_t PCF8574::read8()
{
if (_wire->requestFrom(_address, (uint8_t)1) != 1)
@ -252,10 +254,11 @@ uint8_t PCF8574::readButton(const uint8_t pin)
uint8_t temp = _dataOut;
PCF8574::write(pin, HIGH);
uint8_t rtn = PCF8574::read(pin);
uint8_t value = PCF8574::read(pin);
PCF8574::write8(temp);
return rtn;
return value;
}
// -- END OF FILE --

29
libraries/PCF8574/PCF8574.h
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@ -1,9 +1,9 @@
#pragma once
//
// FILE: PCF8574.H
// FILE: PCF8574.h
// AUTHOR: Rob Tillaart
// DATE: 02-febr-2013
// VERSION: 0.3.2
// VERSION: 0.3.3
// PURPOSE: Arduino library for PCF8574 - 8 channel I2C IO expander
// URL: https://github.com/RobTillaart/PCF8574
// http://forum.arduino.cc/index.php?topic=184800
@ -17,46 +17,52 @@
#include "Wire.h"
#define PCF8574_LIB_VERSION (F("0.3.2"))
#define PCF8574_LIB_VERSION (F("0.3.3"))
#ifndef PCF8574_INITIAL_VALUE
#define PCF8574_INITIAL_VALUE 0xFF
#define PCF8574_INITIAL_VALUE 0xFF
#endif
#define PCF8574_OK 0x00
#define PCF8574_PIN_ERROR 0x81
#define PCF8574_I2C_ERROR 0x82
#define PCF8574_OK 0x00
#define PCF8574_PIN_ERROR 0x81
#define PCF8574_I2C_ERROR 0x82
class PCF8574
{
public:
explicit PCF8574(const uint8_t deviceAddress, TwoWire *wire = &Wire);
explicit PCF8574(const uint8_t deviceAddress = 0x20, TwoWire *wire = &Wire);
#if defined (ESP8266) || defined(ESP32)
bool begin(uint8_t sda, uint8_t scl, uint8_t val = PCF8574_INITIAL_VALUE);
bool begin(uint8_t sda, uint8_t scl, uint8_t value = PCF8574_INITIAL_VALUE);
#endif
bool begin(uint8_t val = PCF8574_INITIAL_VALUE);
bool begin(uint8_t value = PCF8574_INITIAL_VALUE);
bool isConnected();
// note: setting the address corrupt internal buffer values
// a read8() / write8() call updates them.
bool setAddress(const uint8_t deviceAddress);
uint8_t getAddress();
uint8_t read8();
uint8_t read(const uint8_t pin);
uint8_t value() const { return _dataIn; };
void write8(const uint8_t value);
void write(const uint8_t pin, const uint8_t value);
uint8_t valueOut() const { return _dataOut; }
//added 0.1.07/08 Septillion
inline uint8_t readButton8() { return PCF8574::readButton8(_buttonMask); }
uint8_t readButton8(const uint8_t mask);
uint8_t readButton(const uint8_t pin);
inline void setButtonMask(const uint8_t mask) { _buttonMask = mask; };
uint8_t getButtonMask() { return _buttonMask; };
// rotate, shift, toggle, reverse expect all lines are output
void toggle(const uint8_t pin);
@ -67,8 +73,10 @@ public:
void rotateLeft(const uint8_t n = 1);
void reverse();
int lastError();
private:
uint8_t _address;
uint8_t _dataIn;
@ -81,3 +89,4 @@ private:
// -- END OF FILE --

60
libraries/PCF8574/README.md
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@ -1,8 +1,11 @@
[![Arduino CI](https://github.com/RobTillaart/PCF8574/workflows/Arduino%20CI/badge.svg)](https://github.com/marketplace/actions/arduino_ci)
[![Arduino-lint](https://github.com/RobTillaart/PCF8574/actions/workflows/arduino-lint.yml/badge.svg)](https://github.com/RobTillaart/PCF8574/actions/workflows/arduino-lint.yml)
[![JSON check](https://github.com/RobTillaart/PCF8574/actions/workflows/jsoncheck.yml/badge.svg)](https://github.com/RobTillaart/PCF8574/actions/workflows/jsoncheck.yml)
[![License: MIT](https://img.shields.io/badge/license-MIT-green.svg)](https://github.com/RobTillaart/PCF8574/blob/master/LICENSE)
[![GitHub release](https://img.shields.io/github/release/RobTillaart/PCF8574.svg?maxAge=3600)](https://github.com/RobTillaart/PCF8574/releases)
# PCF8574
Arduino library for PCF8574 - 8 channel I2C IO expander
@ -13,7 +16,7 @@ Arduino library for PCF8574 - 8 channel I2C IO expander
Related to the PCF8575 16 channel IO expander library https://github.com/RobTillaart/PCF8575
This library gives easy control over the 8 pins of a PCF8574 and PCF8574A chip.
These chips are identical in behavior although there are two distinct address ranges.
These chips are identical in behaviour although there are two distinct address ranges.
| TYPE | ADDRESS-RANGE | notes |
|:---------|:-------------:|:------------------------:|
@ -25,25 +28,25 @@ to 16 x 8 = 128 IO lines. To maximize IO lines combine 8 x PCF8575 + 8 x PCF8574
128 + 64 = 192 IO lines. Be sure to have a well dimensioned power supply.
The library allows to read and write both single pins or 8 pins at once.
Furthermore some additional functions are implemented that are
playful but useful.
Furthermore some additional functions are implemented that are playful but useful.
## Interface
**PCF8574_INITIAL_VALUE** is a define that can be set compile time or before
the include of "pcf8574.h" to overrule the default value used with the
**begin()** call.
the include of "pcf8574.h" to overrule the default value used with the **begin()** call.
### Constructor
- **PCF8574(deviceAddress, TwoWire \*wire = &Wire)** Constructor with device address,
and optional the Wire interface as parameter.
- **bool begin(val = PCF8574_INITIAL_VALUE)** set the initial value for the pins and masks.
- **bool begin(sda, scl, val = PCF8574_INITIAL_VALUE)** idem, for the ESP32 where one can choose the I2C pins.
- **PCF8574(uint8_t deviceAddress = 0x20, TwoWire \*wire = &Wire)** Constructor with optional device address, default 0x20,
and the optional Wire interface as parameter.
- **bool begin(uint8_t value = PCF8574_INITIAL_VALUE)** set the initial value for the pins and masks.
- **bool begin(uint8_t sda, uint8_t scl, uint8_t value = PCF8574_INITIAL_VALUE)** idem, for the ESP32 where one can choose the I2C pins.
- **bool isConnected()** checks if the address set in the constructor or by **setAddress()** is visible on the I2C bus.
- **bool setAddress(const uint8_t deviceAddress)** sets the device address after construction. Can be used to switch between PCF8574 modules runtime. Note this corrupts internal buffered values, so one might need to call **read8()** and/or **write8()**. Returns true if address can be found on I2C bus.
- **bool setAddress(const uint8_t deviceAddress)** sets the device address after construction.
Can be used to switch between PCF8574 modules runtime. Note this corrupts internal buffered values,
so one might need to call **read8()** and/or **write8()**. Returns true if address can be found on I2C bus.
- **uint8_t getAddress()** returns the device address.
@ -53,17 +56,27 @@ and optional the Wire interface as parameter.
- **uint8_t read(uint8_t pin)** reads a single pin; pin = 0..7
- **uint8_t value()** returns the last read inputs again, as this information is buffered
in the class this is faster than reread the pins.
- **void write8(const uint8_t value)** writes all 8 pins at once. This one does the actual reading.
- **uint8_t write(const uint8_t pin, const uint8_t value)** writes a single pin; pin = 0..7; value is HIGH(1) or LOW (0)
- **void write8(const uint8_t value)** writes all 8 pins at once. This one does the actual writing.
- **uint8_t write(const uint8_t pin, const uint8_t value)** writes a single pin; pin = 0..7;
value is HIGH(1) or LOW (0)
- **valueOut()** returns the last written data.
### Button
- **void setButtonMask(const uint8_t mask)**
- **uint8_t readButton8()**
- **uint8_t readButton8(const uint8_t mask)**
- **uint8_t readButton(const uint8_t pin)**
The **"button"** functions are to be used when you mix input and output on one IC.
It does not change / affect the pins used for output by masking these.
Typical usage is to call **setButtonMask()** once in setup as pins do not (often) change
during program execution.
- **void setButtonMask(const uint8_t mask)** sets the (bit) mask which lines are input.
- **uint8_t getButtonMask()** returns the set buttonMask.
- **uint8_t readButton8()** use the mask set by setButtonMask to select specific input pins.
- **uint8_t readButton8(const uint8_t mask)** use a specific mask to select specific input pins.
Note this can be a subset of the pins set with **setButtonMask()** if one wants to process not all.
- **uint8_t readButton(const uint8_t pin)** read a singe input pin.
Background - https://github.com/RobTillaart/Arduino/issues/38
### Special
@ -71,13 +84,13 @@ in the class this is faster than reread the pins.
- **void toggle(const uint8_t pin)** toggles a single pin
- **void toggleMask(const uint8_t mask = 0xFF)** toggles a selection of pins,
if you want to invert all pins use 0xFF (default value).
- **void shiftRight(const uint8_t n = 1)** shifts output channels n pins (default 1) pins right (e.g. leds ).
- **void shiftRight(const uint8_t n = 1)** shifts output channels n pins (default 1) pins right (e.g. LEDs ).
Fills the higher lines with zero's.
- **void shiftLeft(const uint8_t n = 1)** shifts output channels n pins (default 1) pins left (e.g. leds ).
- **void shiftLeft(const uint8_t n = 1)** shifts output channels n pins (default 1) pins left (e.g. LEDs ).
Fills the lower lines with zero's.
- **void rotateRight(const uint8_t n = 1)** rotates output channels to right, moving lowest line to highest line.
- **void rotateLeft(const uint8_t n = 1)** rotates output channels to left, moving highest line to lowest line.
- **void reverse()** revers the "bit pattern" of the lines, high to low and vice versa.
- **void reverse()** reverse the "bit pattern" of the lines, swapping pin 7 with 0, 6 with 1, 5 with 2 and 4 with 3.
### Misc
@ -97,3 +110,12 @@ Fills the lower lines with zero's.
## Operation
See examples
It is advised to use pull-up or pull-down resistors so the lines have a defined state at startup.
## Future
- update documentation
- link to related libraries.

11
libraries/PCF8574/examples/PCF8574_Wire2/PCF8574_Wire2.ino
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@ -2,15 +2,15 @@
// FILE: PCF8574_Wire2.ino
// AUTHOR: Rob Tillaart
// DATE: 2016-04-30
//
// PUPROSE: demo
//
// PUPROSE: demo
#include "PCF8574.h"
// adjust addresses if needed
PCF8574 PCF(0x39, &Wire2);
void setup()
{
Serial.begin(115200);
@ -34,6 +34,7 @@ void setup()
delay(1000);
}
void loop()
{
Serial.println("HLT");
@ -46,6 +47,7 @@ void loop()
}
}
void doHigh()
{
PCF.write(4, HIGH);
@ -54,6 +56,7 @@ void doHigh()
Serial.println(x, HEX);
}
void doLow()
{
PCF.write(4, LOW);
@ -62,6 +65,7 @@ void doLow()
Serial.println(x, HEX);
}
void doToggle()
{
PCF.toggle(4);
@ -72,3 +76,4 @@ void doToggle()
// -- END OF FILE --

16
libraries/PCF8574/examples/PCF8574_interrupt/PCF8574_interrupt.ino
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@ -4,18 +4,19 @@
// DATE: 2020-12-07
// PUPROSE: test PCF8574 library
//
// TEST SETUP
// Connect INT pin of the PCF8574 to UNO pin 2
// Connect INT pin of the PCF8574 to UNO pin 2
//
// (from figure 4 datasheet
// Place a pull up resistor 4K7 between pin and 5V
// Place a capacitor 10-400pF between pin and GND
// (from figure 4 datasheet
// Place a pull up resistor 4K7 between pin and 5V
// Place a capacitor 10-400pF between pin and GND
#include "PCF8574.h"
PCF8574 PCF(0x38);
////////////////////////////////////
//
// INTERRUPT ROUTINE + FLAG
@ -47,6 +48,7 @@ void setup()
attachInterrupt(digitalPinToInterrupt(IRQPIN), pcf_irq, FALLING);
}
void loop()
{
uint32_t now = millis();
@ -60,8 +62,10 @@ void loop()
Serial.print('\t');
Serial.println(x, HEX);
}
// do other things here
// do other things here
delay(10);
}
// -- END OF FILE --

9
libraries/PCF8574/examples/PCF8574_isConnected/PCF8574_isConnected.ino
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@ -2,15 +2,15 @@
// FILE: PCF8574_isConnected.ino
// AUTHOR: Rob Tillaart
// DATE: 2021-01-03
//
// PUPROSE: demo
//
// PUPROSE: demo isConnected function
#include "PCF8574.h"
// adjust addresses if needed
PCF8574 PCF_39(0x39);
void setup()
{
Serial.begin(115200);
@ -32,8 +32,11 @@ void setup()
}
}
void loop()
{
}
// -- END OF FILE --

12
libraries/PCF8574/examples/PCF8574_performance/PCF8574_performance.ino
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@ -2,8 +2,8 @@
// FILE: PCF8574_performance.ino
// AUTHOR: Rob Tillaart
// DATE: 2021-01-24
//
// PUPROSE: test PCF8574 library
// PUPROSE: test PCF8574 library at different I2C speeds.
#include "PCF8574.h"
@ -11,6 +11,7 @@ PCF8574 PCF(0x38);
uint32_t start, stop;
void setup()
{
Serial.begin(115200);
@ -39,10 +40,13 @@ void setup()
Serial.println(stop - start);
delay(1000);
}
}
void loop()
{
}
// -- END OF FILE --

9
libraries/PCF8574/examples/PCF8574_rotaryEncoder/PCF8574_rotaryEncoder.ino
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@ -2,9 +2,8 @@
// FILE: PCF8574_rotaryEncoder.ino
// AUTHOR: Rob Tillaart
// DATE: 2021-05-08
//
// PUPROSE: demo PCF8574 as rotary encoder reader.
//
//
// RotaryEncoder PCF8574 UNO
// --------------------------------------
@ -30,6 +29,8 @@ uint8_t lastpos[4] = {0, 0, 0, 0};
int32_t encoder[4] = {0, 0, 0, 0};
volatile bool flag = false;
// IRQ routine
void moved()
{
flag = true;
@ -50,7 +51,8 @@ void setup()
Wire.begin();
if (decoder.begin() == false)
{
Serial.println("\nERROR: cannot communicate to keypad.\nPlease reboot / adjust address.\n");
Serial.println("\nERROR: cannot communicate to PCF8574.");
Serial.println("Please reboot / adjust address.\n");
while (1);
}
Wire.setClock(600000);
@ -129,3 +131,4 @@ void updateRotaryDecoder()
// -- END OF FILE --

13
libraries/PCF8574/examples/PCF8574_test/PCF8574_test.ino
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@ -1,16 +1,15 @@
//
// FILE: PCF8574_test.ino
// AUTHOR: Rob Tillaart
// DATE: 7-febr-2013
//
// PUPROSE: test PCF8574 library
//
#include "PCF8574.h"
PCF8574 PCF_01(0x38);
void setup()
{
Serial.begin(115200);
@ -26,6 +25,7 @@ void setup()
delay(1000);
}
void loop()
{
Serial.println("HLT");
@ -38,6 +38,7 @@ void loop()
}
}
void doHigh()
{
PCF_01.write(4, HIGH);
@ -46,6 +47,7 @@ void doHigh()
Serial.println(x, HEX);
}
void doLow()
{
PCF_01.write(4, LOW);
@ -54,6 +56,7 @@ void doLow()
Serial.println(x, HEX);
}
void doToggle()
{
PCF_01.toggle(4);
@ -61,3 +64,7 @@ void doToggle()
Serial.print("Read ");
Serial.println(x, HEX);
}
// -- END OF FILE --

13
libraries/PCF8574/examples/PCF8574_test1/PCF8574_test1.ino
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@ -1,16 +1,16 @@
//
// FILE: pcf8574_test.ino
// FILE: PCF8574_test.ino
// AUTHOR: Rob Tillaart
// DATE: 27-08-2013
//
// PUPROSE: demo
//
#include "PCF8574.h"
// adjust addresses if needed
PCF8574 PCF_38(0x38); // add switches to lines (used as input)
PCF8574 PCF_39(0x39); // add leds to lines (used as output)
PCF8574 PCF_39(0x39); // add LEDs to lines (used as output)
void setup()
{
@ -62,12 +62,15 @@ void setup()
}
}
void loop()
{
// echos the lines
// echo the state of the lines on the other PCF
uint8_t value = PCF_38.read8();
PCF_39.write8(value);
delay(100);
}
// END OF FILE

9
libraries/PCF8574/examples/PCF8574_test2/PCF8574_test2.ino
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@ -2,14 +2,14 @@
// FILE: pcf8574_test2.ino
// AUTHOR: Rob Tillaart
// DATE: 2016-04-30
//
// PUPROSE: demo rotateLeft, -Right and toggleMask
//
#include "PCF8574.h"
// adjust addresses if needed
PCF8574 PCF_39(0x39); // add leds to lines (used as output)
PCF8574 PCF_39(0x39); // add LEDs to lines (used as output)
void setup()
{
@ -61,8 +61,11 @@ void setup()
}
}
void loop()
{
}
// -- END OF FILE --

8
libraries/PCF8574/examples/buttonRead/buttonRead.ino
View File

@ -24,9 +24,11 @@
* no matter the set output state when you press the button.
*/
#include <PCF8574.h>
#include <Wire.h>
PCF8574 pcf20(0x20);
const byte onboardLed = 13;
@ -35,6 +37,7 @@ const byte PcfButtonLedPin = 0;
unsigned int blinkMillis;
unsigned int buttonMillis;
void setup() {
Serial.begin(115200);
pcf20.begin();
@ -42,6 +45,7 @@ void setup() {
pinMode(onboardLed, OUTPUT);
}
void loop() {
static bool state;
unsigned int currentMillis = millis();
@ -71,3 +75,7 @@ void loop() {
Serial.println(pcf20.read8(), BIN);
}
}
// -- END OF FILE --

44
libraries/PCF8574/examples/buttonRead8/buttonRead8.ino
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@ -24,9 +24,11 @@
* no matter the set output state when you press the button.
*/
#include <PCF8574.h>
#include <Wire.h>
PCF8574 pcf20(0x20);
const byte onboardLed = 13;
@ -36,50 +38,52 @@ const byte PcfLedPin = 1;
unsigned int blinkMillis;
unsigned int buttonMillis;
void setup() {
Serial.begin(115200);
pcf20.begin();
pinMode(onboardLed, OUTPUT);
//As alternative to adding the mask to buttonRead8() every time
//you can set it once.
//Without setting a mask buttonRead8() will effect ALL pins.
//Not a problem when using things like LEDs.
//pcf20.setButtonMask(_BV(PcfButtonLedPin));
// As alternative to adding the mask to buttonRead8() every time
// you can set it once.
// Without setting a mask buttonRead8() will effect ALL pins.
// Not a problem when using things like LEDs.
// pcf20.setButtonMask(_BV(PcfButtonLedPin));
}
void loop() {
static bool state;
unsigned int currentMillis = millis();
//Limit button read to 20 times a second
//Fast enough for most buttons
//but this way you don't have a dimmer output because it's blanked during button read
//a read takes 460us t 16Mhz Arduino and normal I2C speed.
// Limit button read to 20 times a second
// Fast enough for most buttons
// but this way you don't have a dimmer output because it's blanked during button read
// a read takes 460us t 16Mhz Arduino and normal I2C speed.
if(currentMillis - buttonMillis >= 50){
buttonMillis = currentMillis;
//read all states but only force PcfButtonLedPin HIGH during the
//buttonRead8()
//Alternativly the mask could have been set with setButtonMask().
//Then the mask can be omitted here. See setup()
// byte inputStates = pcf20.readButton8(_BV(PcfButtonLedPin));
// read all states but only force PcfButtonLedPin HIGH during the
// buttonRead8()
// Alternatively the mask could have been set with setButtonMask().
// Then the mask can be omitted here. See setup()
// byte inputStates = pcf20.readButton8(_BV(PcfButtonLedPin));
byte inputStates = pcf20.readButton8(1 << PcfButtonLedPin); // Keep Arduino-CI happy
//check the bit of PcfButtonLedPin
// check the bit of PcfButtonLedPin
if(state != bitRead(inputStates, PcfButtonLedPin)){
if(state){
//toggle the LED
// toggle the LED
digitalWrite(onboardLed, !digitalRead(onboardLed));
}
state = !state;
}
}
//Lets blink the same output
// Lets blink the same output
if(currentMillis - blinkMillis >= 500){
//Update time
// Update time
blinkMillis = currentMillis;
pcf20.toggle(PcfButtonLedPin);
@ -87,3 +91,7 @@ void loop() {
Serial.println(pcf20.read8(), BIN);
}
}
// -- END OF FILE --

3
libraries/PCF8574/keywords.txt
View File

@ -37,4 +37,5 @@ lastError KEYWORD2
PCF8574_LIB_VERSION LITERAL1
PCF8574_OK LITERAL1
PCF8574_PIN_ERROR LITERAL1
PCF8574_I2C_ERROR LITERAL1
PCF8574_I2C_ERROR LITERAL1

5
libraries/PCF8574/library.json
View File

@ -15,8 +15,9 @@
"type": "git",
"url": "https://github.com/RobTillaart/PCF8574.git"
},
"version": "0.3.2",
"version": "0.3.3",
"license": "MIT",
"frameworks": "arduino",
"platforms": "*"
"platforms": "*",
"headers": "PCF8574.h"
}

2
libraries/PCF8574/library.properties
View File

@ -1,5 +1,5 @@
name=PCF8574
version=0.3.2
version=0.3.3
author=Rob Tillaart <rob.tillaart@gmail.com>
maintainer=Rob Tillaart <rob.tillaart@gmail.com>
sentence=Arduino library for PCF8574 - 8 channel I2C IO expander

6
libraries/PCF8574/test/unit_test_001.cpp
View File

@ -42,16 +42,17 @@ PCF8574 PCF(0x38);
unittest_setup()
{
fprintf(stderr, "PCF8574_LIB_VERSION: %s\n", (char *) PCF8574_LIB_VERSION);
}
unittest_teardown()
{
}
unittest(test_begin)
{
fprintf(stderr, "VERSION: %s\n", PCF8574_LIB_VERSION);
PCF8574 PCF(0x38);
PCF.begin();
@ -103,4 +104,5 @@ unittest(test_address)
unittest_main()
// --------