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PROGRAMMING TUTORIALS blue_code.jpg
Welcome to Chandley Tech's programming tutorials section. Here, you will find write-ups on common tasks and configurations, hopefully teaching you something and/or giving you ideas for incorporation into your own projects...
Being able to effortlessly program a handful of electrical components to do basically anything you can think up, while obviously being very handy, is crucial to producing quality prototypes without banging your head on a benchtop.

The first step is to choose a quality microcontroller that can offer you all the common functions at a high bandwidth while conforming to your programming requirements. It should be easy to program when you need something quick or are just starting out, yet it needs to be able to support complexity, especially when you start becomming more comfortable with it. For that reason, ChandleyTech's microcontroller of choice is the Parallax Propeller chip:

Parallax Propeller?

The Propeller is an eight processor, 32-bit microcontroller that simply outperforms all other microcontrollers due to its ability to perform multi-threaded processes and parallel operations. It is what we here at ChandleyTech work with the most for autonomous electronics.

To name its most notable features:

- Eight 32-bit processors
- 64kb internal memory for RAM/ROM
- 32 I/O pins
- Onboard video support (VGA, NTSC)
- Requires a minimal part count in a circuit

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The Propeller chip is programmed with what is called "Spin" code, a high-level, powerful, easy-to-learn language, as well as a low-level language, Propeller Assembly, which can execute commands much faster but is not necessary for everyday use. What makes the programming experience unique is the ability to use what are called "Objects," which are snippets of pre-written code that you simply drop into a project for common devices, such as communication and LCD screens, vastly speeding up the prototyping process.

The projects below are based on a modular object file system, so that you can effortlessly reconstruct them yourself, and use the objects in other projects.
The Propeller is a fine product of Parallax Inc. - more information and purchasing can be accessed via the Parallax Site.
Chandley Technologies' PropConnect :

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Goto the PropConnect Main Page

This program has been written exclusively by Chandley Technologies, and allows bi-directional communication to the Parallax Propeller chip in an environment similar to that of hyper-terminal, with its main feature being graphical user interfaces (GUIs) for each project. This gives users the ability to interact with an array of buttons and readouts pertaining to the status of the inputs/outputs of the Propeller chip. Preloaded basic GUIs are selectable from a list and others will be able to be imported into the program for most of the tutorials offered on this page. Custom GUIs can be created upon request - ChandleyTech@gmail.com

For use with the Parallax Propeller, or any other microcontroller that accepts a serial, full-duplex interface over a COM port.

 
 
Propeller Programming Tutorials

Modules and Integration...

Jump To: • Getting Started/The Basics
Jump To: • Sensors
Jump To: • Motion
Jump To: • Control
Jump To: • Display
Jump To: • Communications
Jump To: • Home Automation		  
GETTING STARTED/THE BASICS:  
Highs & Lows

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Pulse Width Modulation (PWM)

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Using PropConnect

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Coding for General Terminal Usage

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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SENSORS:  
Temperature

Programming Language: Propeller/Spin Code prop_logo_45px.gif

 LM34 Temperature Sensor
Pressure

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Infrared (IR)

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Voltage

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Laser Ranging

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Accelerometers

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Gyroscopes

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Microphone

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Analog-to-Digital Converting

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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MOTION:  
Servo Motor

Programming Language: Propeller/Spin Code, Assembly prop_logo_45px.gif

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Stepper Motor

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Speed Controllers

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Pneumatics

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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•• Dual Stepper Motor Control via Hyterminal Interface

 

- Prerequisite for the Autonomous Sentry Turret Targeting

Programming Language: Propeller/Spin Code, Assembly prop_logo_45px.gif

- Control circuit and code to handle two stepper motors. Both stepper motors are meant to be set up for the purpose of rotation and elevation of a gimball platform.

The interface is done over a USB connection to the Propeller chip, with a command interface over hyperterminal. The chip asks for the desired movement in degrees for the platform and manipulates the stepper motors when a value is entered in a unique format.

For example: U40 would rotate the platform up by 40° // R32 would then spin the platform right by 32°...

The program requires the use of three cogs when under full load, but closes down a cog when there is no movement in progress. The two cogs which run consistently are for the hyperterminal connection and the use of floating-point math operations.

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CONTROL:  
Serial Control

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Nintendo 64 Controller

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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PlayStation2 Controller

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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DISPLAY:  
LCD Displays

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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VGA Display

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Composite Display

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Video Source Switch

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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COMMUNICATIONS:  
Wireless - 900MHz

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Wireless - 2.4GHz

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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RFID

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Bluetooth

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Ethernet Communication

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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HOME AUTOMATION:  
Home Automation - Relays

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Home Automation - Remote Control

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Home Automation - Text-to-Speech

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Home Automation - Video Source Controller

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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Home Automation - Intranet Controller

Programming Language: Propeller/Spin Code prop_logo_45px.gif

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