adding DRV8833 code examples

Author: caternuson

Adafruit_DRV8833/arduino/drv8833_onoff/drv8833_onoff.ino

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+// SPDX-FileCopyrightText: 2025 Carter Nelson for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+// Basic ON/OFF control of DC motor via DRV8833
+
+#define AIN1   5
+#define AIN2   6
+#define SLP    7
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println("Adafruit DRV8833 DC Motor Example - ON/OFF");
+
+  // configure pins
+  pinMode(AIN1, OUTPUT);
+  pinMode(AIN2, OUTPUT);
+  pinMode(SLP, OUTPUT);
+
+  // enable DRV8833
+  digitalWrite(SLP, HIGH);
+}
+
+void loop() {
+  //
+  // FORWARD
+  //
+  Serial.println("Forward");
+  digitalWrite(AIN1, HIGH);
+  digitalWrite(AIN2, LOW);
+  delay(1000);
+
+  //
+  // REVERSE
+  //
+  Serial.println("Reverse");
+  digitalWrite(AIN1, LOW);
+  digitalWrite(AIN2, HIGH);
+  delay(1000);
+}

Adafruit_DRV8833/arduino/drv8833_pwm/drv8833_pwm.ino

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+// SPDX-FileCopyrightText: 2025 Carter Nelson for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+// PWM speed control of DC motor via DRV8833
+
+#define AIN1   5
+#define AIN2   6
+#define SLP    7
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println("Adafruit DRV8833 DC Motor Example - PWM");
+
+  // configure pins
+  pinMode(AIN1, OUTPUT);
+  pinMode(AIN2, OUTPUT);
+  pinMode(SLP, OUTPUT);
+
+  // enable DRV8833
+  digitalWrite(SLP, HIGH);
+}
+
+void loop() {
+  //
+  // FORWARD
+  //
+  Serial.println("Forward");
+  digitalWrite(AIN2, LOW);
+  // ramp speed up
+  Serial.println("  ramping up");
+  for (int duty_cycle=0; duty_cycle<256; duty_cycle++) {
+    analogWrite(AIN1, duty_cycle);
+    delay(10);
+  }
+  // ramp speed down
+  Serial.println("  ramping down");
+  for (int duty_cycle=255; duty_cycle>=0; duty_cycle--) {
+    analogWrite(AIN1, duty_cycle);
+    delay(10);
+  }
+
+  //
+  // REVERSE
+  //
+  Serial.println("Reverse");
+  digitalWrite(AIN1, LOW);
+  // ramp speed up
+  Serial.println("  ramping up");
+  for (int duty_cycle=0; duty_cycle<256; duty_cycle++) {
+    analogWrite(AIN2, duty_cycle);
+    delay(10);
+  }
+  // ramp speed down
+  Serial.println("  ramping down");
+  for (int duty_cycle=255; duty_cycle>=0; duty_cycle--) {
+    analogWrite(AIN2, duty_cycle);
+    delay(10);
+  }
+}

Adafruit_DRV8833/arduino/drv8833_stepper/drv8833_stepper.ino

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+// SPDX-FileCopyrightText: 2025 lady ada for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#include <Stepper.h>
+
+// change this to the number of steps on your motor
+#define STEPS 200
+
+// create an instance of the stepper class, specifying
+// the number of steps of the motor and the pins it's
+// attached to
+Stepper stepper(STEPS, 4, 5, 6, 7);
+
+
+void setup()
+{
+  Serial.begin(9600);
+  Serial.println("Stepper test!");
+  // set the speed of the motor to 30 RPMs
+  stepper.setSpeed(60);
+}
+
+void loop()
+{
+  Serial.println("Forward");
+  stepper.step(STEPS);
+  Serial.println("Backward");
+  stepper.step(-STEPS);
+}

Adafruit_DRV8833/circuitpython/onoff/code.py

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+# SPDX-FileCopyrightText: 2025 Carter Nelson for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+import time
+import board
+import digitalio
+
+# Configure pins
+AIN1 = digitalio.DigitalInOut(board.D5)
+AIN2 = digitalio.DigitalInOut(board.D6)
+SLP = digitalio.DigitalInOut(board.D7)
+
+AIN1.switch_to_output()
+AIN2.switch_to_output()
+SLP.switch_to_output()
+
+# Enable DRV8833
+SLP.value = True
+
+# Loop forever
+while True:
+    #
+    # FORWARD
+    #
+    print("Forward")
+    AIN1.value = True
+    AIN2.value = False
+    time.sleep(1)
+
+    #
+    # REVERSE
+    #
+    print("Reverse")
+    AIN1.value = False
+    AIN2.value = True
+    time.sleep(1)

Adafruit_DRV8833/circuitpython/pwm/code.py

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+# SPDX-FileCopyrightText: 2025 Carter Nelson for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+import time
+import board
+import digitalio
+import pwmio
+
+# Configure pins
+AIN1 = pwmio.PWMOut(board.D5, frequency=2000)
+AIN2 = pwmio.PWMOut(board.D6, frequency=2000)
+SLP = digitalio.DigitalInOut(board.D7)
+
+SLP.switch_to_output()
+
+# Enable DRV8833
+SLP.value = True
+
+# Loop forever
+while True:
+    #
+    # FORWARD
+    #
+    print("Forward")
+    AIN2.duty_cycle = 0
+    print("  ramping up")
+    for duty_cycle in range(0, 65536, 100):
+        AIN1.duty_cycle = duty_cycle
+        time.sleep(0.01)
+    print("  ramping down")
+    for duty_cycle in range(65535, -1, -100):
+        AIN1.duty_cycle = duty_cycle
+        time.sleep(0.01)
+
+    #
+    # REVERSE
+    #
+    print("Reverse")
+    AIN1.duty_cycle = 0
+    print("  ramping up")
+    for duty_cycle in range(0, 65536, 100):
+        AIN2.duty_cycle = duty_cycle
+        time.sleep(0.01)
+    print("  ramping down")
+    for duty_cycle in range(65535, -1, -100):
+        AIN2.duty_cycle = duty_cycle
+        time.sleep(0.01)