EFA:TMC2209 SilentStepStick

• See the Watterott tutorial
• Product Page from the manufacturer

Pin Functions

Pin	Function
.	Power Supply
GND	Ground
VM	Motor Supply Voltage (5.5-28V)
VIO	Logic Supply Voltage (3.3-5V)
.	Motor Outputs
M1A	Motor Coil 1
M1B	Motor Coil 1
M2A	Motor Coil 2
M2B	Motor Coil 2
.	Control Inputs
STEP	Step-Signal Input
DIR	Direction-Signal Input
EN	Enable Motor Outputs (GND=on, VIO=off)
.	Configuration
MS1	Step-Configuration or Slave-Address on UART, pd
MS2	Step-Configuration or Slave-Address on UART, pd
SPREAD	Chopper, pd (GND=stealthChop, VIO=spreadCycle)
PDN_UART	UART and Auto Power Down Control, pd (GND=on, VIO=off)
DIAG	Diagnostics Output (VIO=error)
INDEX	Index Output (one pulse per each four fullsteps)
VREF	Analog Reference Voltage

How to Use It?

This is a simple setup that doesn’t use all the fancier features of the stepper driver.

Step Configuration

CFG2/MS2	CFG1/MS1	SPREAD/MS3	Steps	Interpolation	Mode
GND	GND	GND	1/8	1/256	stealthChop
GND	VIO	GND	1/32	1/256	stealthChop
VIO	GND	GND	1/64	1/256	stealthChop
VIO	VIO	GND	1/16	1/256	stealthChop
GND	GND	VIO	1/8	1/256	spreadCycle
GND	VIO	VIO	1/32	1/256	spreadCycle
VIO	GND	VIO	1/64	1/256	spreadCycle
VIO	VIO	VIO	1/16	1/256	spreadCycle

int enPin = 4;
int dirPin = 2;
int stepPin = 3;
int stepAmount = 400;
int microSteps = 16; // 16 means 1/16, 32 means 1/32 etc.

void setup() {
  // put your setup code here, to run once:
  pinMode(dirPin, OUTPUT);
  pinMode(stepPin, OUTPUT);
  pinMode(enPin, OUTPUT);
  digitalWrite(dirPin, HIGH);
  digitalWrite(enPin, LOW);
}

void loop() {
  oneFullRotation();
  delay(1000);
}

void oneStep() {
  digitalWrite(stepPin, HIGH);
  delayMicroseconds(100);
  digitalWrite(stepPin, LOW);
  delayMicroseconds(100);
}

void oneFullRotation() {
  for (int i = 0; i < stepAmount * microSteps; i++) {
    oneStep();
  }
}