Code for rotary encoders

badghandi · September 4, 2021, 9:49pm

Hi. Im new to arduino.
Can someone help me write a code for arduino uno, 8 rotary encoders and 2 shift registers?

So 4 rotary encoders to each shift register.

I will use more encoders if i can make these work.

Im using pcf8574t shift register
And Ec12e20 rotary encoders.

PieterP · September 4, 2021, 10:03pm

That's not a shift register, that's an I2C IO expander.

Here's what I use for reading encoders using an MCP23017, different IO expander chip, similar principle.

github.com

tttapa/Arduino-Helpers/blob/master/src/AH/Hardware/MCP23017Encoders.hpp

#pragma once

#include <AH/Settings/NamespaceSettings.hpp>
#include <AH/Settings/Warnings.hpp>

AH_DIAGNOSTIC_WERROR() // Enable errors on warnings

AH_DIAGNOSTIC_EXTERNAL_HEADER()
#include <AH/Arduino-Wrapper.h>
AH_DIAGNOSTIC_POP()

#include <AH/Hardware/ExtendedInputOutput/ExtendedInputOutput.hpp>
#include <AH/Hardware/RegisterEncoders.hpp>

BEGIN_AH_NAMESPACE

/**
 * @brief   Class for reading 8 rotary encoders using a MCP23017 I²C port 
 *          expander.
 *

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system · January 2, 2022, 10:03pm

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