I am wanting to get an RPM value from a quadrature encoder that is used to control a stepper motor driving a lead screw on my lathe
Full project
github.com
Unfortunately I am tight for spare pins on the Teensy4 so I would like to be able to derive the RPM and the encoder position from a single pin if possible
Section
Full code
Full project
GitHub - MorryStu/Lathe-controller: Electronic lead screw in metric & imperial
Electronic lead screw in metric & imperial. Contribute to MorryStu/Lathe-controller development by creating an account on GitHub.
github.com
Unfortunately I am tight for spare pins on the Teensy4 so I would like to be able to derive the RPM and the encoder position from a single pin if possible
Section
C++:
void loop() {
{
long RPM;
long newPosition = SpindleEnc.read();
if (newPosition != oldPosition) {
oldPosition = newPosition;
//Serial.println(newPosition);
RPM = (newPosition/?); // some code that involves millis. STRICTLY NO Delay(); EVER...anywhere
display1.clear();
display1.showNumberDec(RPM, false, 2, 1);
}
}
readButton(); // read button and update mode
switch (mode) {
case MM:
mm();
break;
case TPI:Full code
C++:
/*
MM Pin0 = MMButt
Pin1 = MMLed
TPI Pin2 = TPIButt
Pin3 = TPILed
Feed Pin4 = FeedButt
Pin5 = FeedLED
STOP Pin6 = STOPButt
Pin7 = STOPLed
FWD Pin8 = FWDButt
Pin9 = FWDLED
REV Pin10 = REVButt
Pin11 = REVLED
DISP1 Pin16 = DISP1Clk
Pin17 = DISP1Dat
DISP2 Pin18 = DISP2Clk
Pin19 = DISP2Dat
ENC Pin20 = ENCClk
PIN21 = ENCDat
SPINDLE Pin22 = SPINDLE_A
Pin23 = SPINDLE_b
*/
#include <RotaryEncoder.h> //Rotary_Encoder_KY-040_Fixed-main/RotaryEncoder.h https://github.com/ownprox/Rotary_Encoder_KY-040_Fixed.....NOTE. this installs as RotaryEncoder.h, so make sure to remove any existing library
#include <Bounce2.h>
#include <SPI.h>
#include <Wire.h>
#include <TM1637Display.h>
//#include <QuadEncoder.h>
#include <Encoder.h>
#define MMButt_PIN 0 // WE WILL attach() THE BUTTON TO THE FOLLOWING PIN IN setup()
#define MMLed_PIN 1 // DEFINE THE PIN FOR THE LED :
#define TPIButt_PIN 2
#define TPILed_PIN 3
#define FEEDButt_PIN 4
#define FEEDLed_PIN 5
#define STOPButt_PIN 6
#define STOPLed_PIN 7
#define FWDButt_PIN 8
#define FWDLed_PIN 9
#define REVButt_PIN 10
#define REVLed_PIN 11
#define CLK1 16 //Display 1 Clk
#define DIO1 17 // Display 1 data
#define CLK2 18 // Display 2 Clk
#define DIO2 19 // Display 2 data
TM1637Display display1(CLK1, DIO1);
TM1637Display display2(CLK2, DIO2);
Encoder SpindleEnc(22, 23);
Bounce MMdebouncer = Bounce();
Bounce TPIdebouncer = Bounce();
Bounce FEEDdebouncer = Bounce();
Bounce STOPdebouncer = Bounce();
Bounce FWDdebouncer = Bounce();
Bounce REVdebouncer = Bounce();
int ledState = LOW; // SET A VARIABLE TO STORE THE LED STATE
int Counter = 100, LastCount = 0;
float Countermm = Counter;
float Countertpi = 0;
float Counterfeed = 0;
long oldPosition = -999; // for spindle
float Pitchmm; // used for metric leadscrew calculation and stepper config
float Pitchtpi;
enum MODE // available modes
{
MM,
TPI,
FEED,
};
MODE mode = MM;
void RotaryChanged();
RotaryEncoder Rotary(&RotaryChanged, 20, 21, 28); // Pins 20 (DT), 21 (CLK), 28 (SW) - 28 is just a null number as the (SW) is not used
void RotaryChanged() {
const unsigned int state = Rotary.GetState();
if (state & DIR_CW)
Counter++;
if (state & DIR_CCW)
Counter--;
}
void setup() {
Serial.begin(9600);
Serial.println("T.I.S.M"); // Death to ART tour, featuring Great Trucking Songs of The Renaissance
display1.setBrightness(0x0f);
display2.setBrightness(0x0f);
delay(500);
display1.clear();
display2.clear();
display1.showNumberDecEx(8888, 0b01000000, false, 4, 4); //Displays 10.11
display2.showNumberDec(1234, false, 4, 0); // shows 10 on far left
MMdebouncer.attach(MMButt_PIN, INPUT_PULLUP); // Attach the debouncer to a pin with INPUT_PULLUP mode
MMdebouncer.interval(25); // Use a debounce interval of 25 milliseconds
pinMode(MMLed_PIN, OUTPUT); // Setup the LED
digitalWrite(MMLed_PIN, ledState);
TPIdebouncer.attach(TPIButt_PIN, INPUT_PULLUP);
TPIdebouncer.interval(25);
pinMode(TPILed_PIN, OUTPUT);
digitalWrite(TPILed_PIN, ledState);
FEEDdebouncer.attach(FEEDButt_PIN, INPUT_PULLUP);
FEEDdebouncer.interval(25);
pinMode(FEEDLed_PIN, OUTPUT);
digitalWrite(FEEDLed_PIN, ledState);
STOPdebouncer.attach(STOPButt_PIN, INPUT_PULLUP);
STOPdebouncer.interval(25);
pinMode(STOPLed_PIN, OUTPUT);
digitalWrite(STOPLed_PIN, ledState);
FWDdebouncer.attach(FWDButt_PIN, INPUT_PULLUP);
FWDdebouncer.interval(25);
pinMode(FWDLed_PIN, OUTPUT);
digitalWrite(FWDLed_PIN, ledState);
REVdebouncer.attach(REVButt_PIN, INPUT_PULLUP);
REVdebouncer.interval(25);
pinMode(REVLed_PIN, OUTPUT);
digitalWrite(REVLed_PIN, ledState);
}
void loop() {
{
long RPM;
long newPosition = SpindleEnc.read();
if (newPosition != oldPosition) {
oldPosition = newPosition;
//Serial.println(newPosition);
RPM = (newPosition/?); // some code that involves millis. STRICTLY NO Delay(); EVER...anywhere
display1.clear();
display1.showNumberDec(RPM, false, 2, 1);
}
}
readButton(); // read button and update mode
switch (mode) {
case MM:
mm();
break;
case TPI:
tpi();
break;
case FEED:
feed();
break;
}
}
// read button and update mode
void readButton() {
MMdebouncer.update(); // Update the Bounce instance
if (MMdebouncer.fell()) { // Call code if button transitions from HIGH to LOW
ledState = !ledState; // Toggle LED state
digitalWrite(MMLed_PIN, ledState);
switch (mode)
case MM:
default:
break;
} else
TPIdebouncer.update();
if (TPIdebouncer.fell()) {
ledState = !ledState;
digitalWrite(TPILed_PIN, ledState);
switch (mode)
case TPI:
default:
break;
} else
FEEDdebouncer.update();
if (FEEDdebouncer.fell()) {
ledState = !ledState;
digitalWrite(FEEDLed_PIN, ledState);
switch (mode)
case FEED:
default:
break;
}
}
void mm() {
Serial.println("void mm");
if (LastCount != Counter) {
//Serial.println(Counter);
Pitchmm = Counter / 100.00; //Metric threads have dec point values. i.e 1.25mm
display2.clear();
display2.showNumberDecEx(Counter, 0b10000000, true, 3, 1); // Use Counter value for deciml point placement on LED disp
Serial.println(Pitchmm);
}
}
void tpi() {
Serial.println("void tpi");
if (LastCount != Counter) {
Serial.println(Counter);
Pitchtpi = Counter; // value in TPI
display2.clear();
display2.showNumberDec(Pitchtpi, false, 2, 1);
}
}
void feed() {
Serial.println("feed tpi");
if (LastCount != Counter) {
Serial.println(Counter);
Pitchtpi = Counter; // value in TPI
display2.clear();
display2.showNumberDec(Pitchtpi, false, 2, 1);
}
}