Bourns encoder project

Projects Networking, Protocols, and Devices
5

Sources...

The original code references both LCD and LCD_I2C... so, pick one and change all the references inside the code... it eventually compiles.

/* Control Stepper Motor with I2C 'Bourns EAW' encoder
 
Created by Yvan / https://Brainy-Bits.com

This code is in the public domain...

You can: copy it, use it, modify it, share it or just plain ignore it!
Thx!
*/


#include <LiquidCrystal_I2C.h>  // I2C LCD Library by Francisco Malpartida https://bitbucket.org/fmalpartida/new-liquidcrystal/wiki/Home
#include <AccelStepper.h>  // AccelStepper Library https://www.arduinolibraries.info/libraries/accel-stepper


#define lcd_addr 0x27     // I2C address of typical I2C LCD Backpack
#define bourns_addr 0x20  // I2C address of I2C Expander module (A0-A1-A2 dip switch to off position)

// LCD Pins to I2C LCD Backpack - These are default for HD44780 LCD's
#define Rs_pin 0
#define Rw_pin 1
#define En_pin 2
#define BACKLIGHT_PIN 3
#define D4_pin 4
#define D5_pin 5
#define D6_pin 6
#define D7_pin 7

// Create instance for LCD called: i2c_lcd
LiquidCrystal_I2C i2c_lcd(lcd_addr,En_pin,Rw_pin,Rs_pin,D4_pin,D5_pin,D6_pin,D7_pin);


const int pinSTEP=11;  // STEP pin of EasyDriver connected to pin 11 of UNO
const int pinDIR=10;  // DIR  pin of EasyDriver connected to pin 10 of UNO

AccelStepper stepper(1, pinSTEP, pinDIR);  // Stepper setup

// Include the Bourns EAW Encoder library and maps
#include <ACE128.h>  // https://github.com/arielnh56/ACE128

#include <ACE128map12345678.h> // mapping for pin order 12345678

ACE128 myACE((uint8_t)bourns_addr, (uint8_t*)encoderMap_12345678); // Using I2C connections
//ACE128 myACE(2,3,4,5,6,7,8,9, (uint8_t*)encoderMap_12345678);    // Using direct connections


int16_t multiturn_encoder_value;  // Variable to hold multiturn value of encoder (-32768 to 32767)


void setup() {
  i2c_lcd.begin (16,2); //  our LCD is a 16x2, change for your LCD if needed
  
  // LCD Backlight ON
  i2c_lcd.setBacklightPin(BACKLIGHT_PIN,POSITIVE);
  i2c_lcd.setBacklight(HIGH);
  
  i2c_lcd.clear(); // Clear the LCD screen

  stepper.setCurrentPosition(0);  // Set current position of stepper at startup to zero
  stepper.setMaxSpeed(1000.0);      // Set Max Speed of stepper
  stepper.setAcceleration(5000.0);  // Acceleration of stepper
  stepper.setSpeed(1000.0);  // Speed of stepper

  myACE.begin();    // initialize the encoder library
}


void loop() {

  multiturn_encoder_value = myACE.mpos();  // get multiturn value from encoder
  stepper.moveTo(multiturn_encoder_value); // set stepper new position to move to
    
  while (stepper.distanceToGo() != 0) {  // if stepper hasn't reached new position
    stepper.runSpeedToPosition();  // move the stepper until new position reached
  }

// Display the encoder multiturn and stepper position on LCD
  i2c_lcd.setCursor(0,0);
  i2c_lcd.print("Encoder: ");
  i2c_lcd.setCursor(9,0);
  i2c_lcd.print(multiturn_encoder_value);
  i2c_lcd.print("      ");
  i2c_lcd.setCursor(0,1);
  i2c_lcd.print("Stepper: ");
  i2c_lcd.setCursor(9,1);
  i2c_lcd.print(stepper.currentPosition()); 
  i2c_lcd.print("      ");  
}