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Add Arduino UNO R4 support
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‎.project‎

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‎PCF8574.cpp‎

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@@ -53,7 +53,7 @@ PCF8574::PCF8574(uint8_t address, uint8_t interruptPin, void (*interruptFunctio
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_usingInterrupt = true;
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};
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#if !defined(__AVR) && !defined(ARDUINO_ARCH_SAMD) && !defined(TEENSYDUINO)
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#if !defined(__AVR) && !defined(ARDUINO_ARCH_SAMD) && !defined(TEENSYDUINO) && !defined(ARDUINO_ARCH_RENESAS)
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/**
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* Constructor
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* @param address: i2c address
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};
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#endif
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#if defined(ESP32) || defined(ARDUINO_ARCH_SAMD)|| defined(ARDUINO_ARCH_RP2040) || defined(ARDUINO_ARCH_STM32)
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#if defined(ESP32) || defined(ARDUINO_ARCH_SAMD)|| defined(ARDUINO_ARCH_RP2040) || defined(ARDUINO_ARCH_STM32) || defined(ARDUINO_ARCH_RENESAS)
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/**
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* Constructor
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* @param address: i2c address
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*/
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bool PCF8574::begin(){
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this->transmissionStatus = 4;
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#if !defined(__AVR) && !defined(ARDUINO_ARCH_SAMD) && !defined(TEENSYDUINO)
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#if !defined(__AVR) && !defined(ARDUINO_ARCH_SAMD) && !defined(TEENSYDUINO) && !defined(ARDUINO_ARCH_RENESAS)
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DEBUG_PRINT(F("begin(sda, scl) -> "));DEBUG_PRINT(_sda);DEBUG_PRINT(F(" "));DEBUG_PRINTLN(_scl);
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// _wire->begin(_sda, _scl);
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#ifdef ARDUINO_ARCH_STM32

‎PCF8574.h‎

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* PCF8574 GPIO Port Expand
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*
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* AUTHOR: Renzo Mischianti
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* VERSION: 2.3.5
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* VERSION: 2.3.6
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*
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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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PCF8574(uint8_t address);
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PCF8574(uint8_t address, uint8_t interruptPin, void (*interruptFunction)() );
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#if !defined(__AVR) && !defined(ARDUINO_ARCH_SAMD) && !defined(TEENSYDUINO)
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#if !defined(__AVR) && !defined(ARDUINO_ARCH_SAMD) && !defined(TEENSYDUINO) && !defined(ARDUINO_ARCH_RENESAS)
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PCF8574(uint8_t address, int sda, int scl);
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PCF8574(uint8_t address, int sda, int scl, uint8_t interruptPin, void (*interruptFunction)());
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#endif
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#if defined(ESP32) || defined(ARDUINO_ARCH_SAMD) || defined(ARDUINO_ARCH_RP2040) || defined(ARDUINO_ARCH_STM32)
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#if defined(ESP32) || defined(ARDUINO_ARCH_SAMD) || defined(ARDUINO_ARCH_RP2040) || defined(ARDUINO_ARCH_STM32) || defined(ARDUINO_ARCH_RENESAS)
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///// changes for second i2c bus
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PCF8574(TwoWire *pWire, uint8_t address);
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PCF8574(TwoWire *pWire, uint8_t address, uint8_t interruptPin, void (*interruptFunction)() );

‎PCF8574_library.h‎

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* PCF8574 GPIO Port Expand
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*
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* AUTHOR: Renzo Mischianti
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* VERSION: 2.3.5
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* VERSION: 2.3.6
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*
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* https://www.mischianti.org/2019/01/02/pcf8574-i2c-digital-i-o-expander-fast-easy-usage/
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*

‎README.md‎

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#### If you need more pins [here](https://www.mischianti.org/2019/07/22/pcf8575-i2c-16-bit-digital-i-o-expander/) you can find the pcf8575 16bit version of the IC.
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## Changelog
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- 10/07/2023: v2.3.6 Support for Arduino UNO R4
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- 08/02/2023: v2.3.5 Fix STM32 support and add support for Raspberry Pi Pico and other rp2040 boards
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- 10/08/2022: v2.3.4 Add support for custom SERCOM interface of Arduino SAMD devices. Force SDA SCL to use GPIO numeration for STM32 bug (https://www.mischianti.org/forums/topic/compatible-with-stm32duino/).
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- 28/07/2022: v2.3.3 Force SDA SCL to use GPIO numeration (https://www.mischianti.org/forums/topic/cannot-set-sda-clk-on-esp8266/).

‎library.json‎

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{
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"name": "PCF8574 library",
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"version": "2.3.5",
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"version": "2.3.6",
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"keywords": "digital, i2c, encoder, expander, pcf8574, pcf8574a, esp32, esp8266, stm32, SAMD, Arduino, wire, rp2040, Raspberry",
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"description": "Most starred PCF8574 library. i2c digital expander for Arduino, Raspberry Pi Pico and rp2040 boards, esp32, SMT32 and ESP8266. Can read write digital values with only 2 wire. Very simple to use and encoder support.",
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"homepage": "https://www.mischianti.org/category/my-libraries/pcf8574/",

‎library.properties‎

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name=PCF8574 library
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version=2.3.5
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version=2.3.6
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author=Renzo Mischianti <renzo.mischianti@gmail.com>
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maintainer=Renzo Mischianti <renzo.mischianti@gmail.com>
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sentence=Most starred PCF8574 library for Arduino (standard and SAMD), Raspberry Pi Pico and rp2040 boards, ESP8266, smt32 and esp32

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