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RPi

RPi Motor Driver Board

Raspberry Pi Expansion Board, DC Motor / Stepper Motor Driver

Primary Attribute

Category: Expansions, Raspberry Pi

Brand: Waveshare

RPi Motor Driver Board

From Waveshare Wiki

Contents

1 Introduction

2 Interface definitions

3 Control work

4 Examples

4.1 Infrared remote control

4.2 Website remote control

4.2.1 Step 1. Install

webiopi

4.2.2 Step 2. Install and

use mjpg‐streamer

4.2.3 Step 3. Run the robot

program

5 Resources

6 Support

Introduction

Raspberry Pi Expansion Board, DC Motor /

Stepper Motor Driver

More ﴾http://www.waveshare.com/rpi‐

motor‐driver‐board.htm﴿

Interface definitions

Interface wiringPi BCM

M1 P28 20

M2 P29 21

PWMA P25 26

M3 P22 6

M4 P23 13

PWMB P26 12

M1 and M2 are connected to the right motor, while M3 and M4 are connected to the left motor. PWMA

and PWMB are output enable pins, active high enable. When they are driven to High level, the PWM pulse

will be outputted from M1, M2, M3 and M4, so as to control the speed of the robot.

Summary of content (9 pages)

PAGE 1
RPi Motor Driver Board From Waveshare Wiki Contents RPi Motor Driver Board 1 Introduction 2 Interface definitions 3 Control work 4 Examples 4.1 Infrared remote control 4.2 Website remote control 4.2.1 Step 1. Install webiopi 4.2.2 Step 2. Install and use mjpg‐streamer 4.2.3 Step 3.
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will be outputted from M1, M2, M3 and M4, so as to control the speed of the robot.
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This example is based on the Python library, which has been in the latest Raspbian system. However, if there is any error occurs when running the example, you should install the Python library manually. In case that the example is unable to be performed after installing the library, you can try to apply the command chmod +x filename to grant the program the executable permission. Enter the Linux terminal, and input the following command cd ~/RPi‐Motor‐Driver‐Board‐Demo‐Code/python sudo python motor.
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Enter the terminal, and input the line below: sudo webiopi ‐d ‐c /etc/webiopi/config Then, open the browser on your PC or cell phone, and enter the IP address of RPi and the port number: 8000 into the address bar. For example, input http://192.168.1.16:8000 ﴾the address can be changeable according to your actual condition﴿. To login the website, you should enter your account and password. The default account name is webiopi, and the original password is raspberry.
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This section describes the new function: camera, since the RPi can be connected with a camera. If you application do not need this function, please jump to the next section. a﴿ Run the command raspi‐config to start up the camera before using it: sudo raspi‐config Then, select the option Enable Camera. b﴿ For the camera with CSI interface, the system may be unable to find out the device under the directory of /dev/video0. In this case, you should add a line, bcm2835‐v4l2, into the file /etc/modules.
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Under the terminal, pressing the keys Ctrl + C can end the program. However, it should be kept running, since we still need it in the following operations. Step 3. Run the robot program Open another terminal; don’t end the program in the step 2. Enter the directory of magpi‐cambot, which contains the source code for controlling the robot. cd ~/RPi‐Motor‐Driver‐Board‐Demo‐Code/magpi‐cambot Modify the file index.html: sudo nano index.
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You should modify the html tag according to the IP of Raspberry Pi in used. In here, “src” is followed by the IP address of RPi: 192.168.1.16 and the port number: 8080 ﴾This port is used for transmitting stream﴿.
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If you cannot enter this webpage, we recommend you to use the Chrome browser or the Firefox browser. Furthermore, please make sure the current directory of Raspberry Pi is ~/RPi‐Motor‐Driver‐Board‐Demo‐ Code/Webiopi and there should be a file index.html under this directory. And then, input the code sudo webiopi ‐d ‐c /etc/webiopi/config to enter the index.html. Or else, you will go to the WebIOPi Main Menu webpage.
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