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Blockly for PICAXE User Guide

Blockly for PICAXE is a free powerful visual programming tool for generating PICAXE microcontroller programs By stacking coloured blocks on top of each other a control program can be rapidly generated This simple click’n’drag programming method allows students to rapidly develop control sequences for real life microcontroller projects Blockly ca

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Table of Contents

Blockly is a kind of building block programming You can write programs by block to quickly and conveniently control the robot The blockly panel is shown in the following figure and the description of blockly panel is listed in the following table No Description 1 Block area ：Provide all blocks

Does Blockly work offline?
For offline use Blockly is embedded within PICAXE Editor and is also available as a standalone Chrome app. All 3 methods share exactly the same Blockly source code and so work in a similar way on all platforms. However PE6 does contain a more powerful simulation engine.
What are the components of Blockly?
Blockly core: The main Blockly library, which defines the basic Blockly UI and logic. Built-in block definitions: Common blocks such as loops, logic, math, and string manipulation. The JavaScript generator: Converts blocks into JavaScript, and contains block generators for all built-in blocks.
How do I use Blockly?
Count = Count + 1; } The Blockly library adds an editor to your app that represents coding concepts as interlocking blocks. It outputs syntactically correct code in the programming language of your choice. Custom blocks may be created to connect to your own application. Blockly is being used by hundreds of projects, most of them educational:
What is a Blockly Codelab?
Blockly includes everything you need for defining and rendering blocks in a drag-n-drop editor. Each block represents a chunk of code that can be easily stacked and translated into code. MusicMaker, a web app where you can program buttons to play different sounds, using Blockly. This codelab is focused on Blockly.

Overview

Blockly for PICAXE is a free powerful visual programming tool for generating PICAXE microcontroller programs. By stacking coloured blocks on top of each other a control program can be rapidly generated. This simple click’n’drag programming method allows students to rapidly develop control sequences for real life microcontroller projects. Blockly ca

Quick Start

If you are unfamiliar with the program approach to building control systems, it is a good idea to begin by familiarising yourself with the most commonly used blocks, which are: Outputs, Wait, Motor and Inputs. How to build, edit and test run a program Outputs This section shows: how to switch output devices and motors connected to outputs of a PICA

3. Inputs

This section shows: how to check the state of digital sensors connected to a PICAXE microcontroller using the input block; how to use the Interrupt block for instant response to digital sensors; how to use the variable decision block to make use of readings from analogue sensors connected to a PICAXE microcontroller, in a control system. picaxe.com

4. Delays

This section shows: how to created delays using pause and sleep picaxe.com

5. Procedures

This section shows the important technique of building a control system as a number of linked sub systems. picaxe.com

6. Maths & Variables

This section shows: how to create counting systems using Increase and Decrease blocks; how timing can be built into a control system; how Expressions and Random blocks are used to give a value to a variable; how Read and Write blocks are used to store and access values of variables using the PICAXE microcontroller’s EEPROM memory. picaxe.com

7. Advanced Blocks

This section shows: how to use some of the more advanced PICAXE command blocks. picaxe.com

Section 1. How to build, edit and simulate in Blockly

PE6 App Web Click the ‘New Blockly’ ribbon button. Click Project > New Login and then click Project>New The Blockly screen looks similar to: Workspace - This is the right hand area where your program is created Toolbox - This is the collection of available blocks to drag onto the stage Simulation Panel – This displays the animated simulation when

Start block

A Start block marks the point where the program starts running. picaxe.com

Adding a new block

Drag the required block from the toolbox and place it on the workspace. Most blocks have a drop down list of options that are used to alter the way the block operates. Some other blocks have a ‘jigsaw piece’ input position where another block can be dropped, for instance you may drop a constant (number) or a variable into this block. If a block is

Moving blocks

To move a single block or a stack of blocks, select the top block and drag it to its new position. picaxe.com

Cutting, Copying and Pasting

Use the Cut, Copy and Paste options from the Edit menu to cut or copy selected blocks or stack of blocks and paste them either into another part of the same program or into a different program. Alternatively, you can right click and select ‘Duplicate Blocks’ picaxe.com

Comment Blocks

It can be useful to drop comments onto your program to tell other people how it functions. Comment blocks are found in the ‘Advanced’ section. picaxe.com

Labelling a block

It can be useful to give a block an internal comment which identifies what it is used for, e.g. “switch LED on”. To add a comment right click over the block and select ‘Add Comment’ picaxe.com

Grid

The grid can be hidden or displayed via the Blockly Settings. When the grid is displayed blocks automatically ‘snap’ to the nearest grid point. A new ‘?’ icon will then appear, when you click the icon the comment will be displayed and can be edited. The block comment does not affect the operation of a block; they are only a label for ‘humans’ to re

Renaming Inputs and Outputs

It can be useful to rename an Input or Output pin to remember what it is used for. To do this either right click over a block and select ‘Input/Output Table’ or select this item from the main ‘Settings’ menu. Names for all the inputs and outputs can then be entered. After entering the names they will be saved in the Blockly file and will appear i

How to test run a program

Before you download a program to a PICAXE microcontroller, it is useful to be able to check that it works as you intend it to. Simulation has a number of features that allow you to test run the program in the software. picaxe.com

1. The Simulation Panel

As a program runs, the Digital Panel shows the changing state of outputs and inputs as they would be if the program had been downloaded to a PICAXE microcontroller. picaxe.com

2. Simulating digital inputs

To change the state of an input simply click on the input in the simulation panel. It will turn from grey (off) to yellow (on). picaxe.com

3. Simulating analogue inputs

To change the value of an analogue input right click on the input pin to display the radial slider. Turn the slider as required. picaxe.com

4. Run and Stop

To test run a program click the Run button on the toolbar or press + To stop a program running click the Stop icon. As the program runs, the flow of control is highlighted so that you can follow it. If you want to slow down the speed at which flow is highlighted is controlled by the simulation delay slider. picaxe.com

5. Breakpoints

Right click on a block to add a breakpoint flag to it. When the simulation reaches this point the program will then pause. picaxe.com

6. Variables display

If your program uses variables, it is useful to See the changing values of any of the variables that are used in the program will be displayed as the program runs. App – Variables appears under the simulation picaxe.com

Cloud Only (not PE6 or App)

Web browsers do not allow web sites to access the USB port of your computer. This is a very sensible security restriction. Therefore the online Cloud version of Blockly cannot program your chip directly (in the same way the app and PE6 versions can). Therefore the Cloud version instead saves onto your computer an ‘.axe file’ which is a compiled v

Displaying and using BASIC

Blockly is also able to convert any complete program into BASIC or Javascript. BASIC is a text based language that is used throughout the world to program everything from PICAXE microcontrollers to personal computers. Javascript is a very common programming language used for developing web sites. picaxe.com

Why Convert?

Although Blocks are easy to understand and quick to build. BASIC programming languages offer more complexity to advanced level users and the ability to covert a program into BASIC offers a way of learning how BASIC programs are written. picaxe.com

Converting a program into BASIC

‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com ‘Blockly for PICAXE’ makes use of the following open source projects and gratefully acknowledges the hard work of the developers of these projects. picaxe.com

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