Exercise - Using Simulation Macros

Simulation macros are a form of Component macros. Their purpose is to make simulation more realistic by adding physical components to the electronic devices.

When the Flowcode program is compiled and downloaded to a microcontroller, they are ignored - hence the name Simulation macros.

Even a cursory glance at the dialogue box used to configure them shows that they are very powerful devices, with a huge range of possible effects.

This exercise uses two of them to illustrate the use of a PIR (passive infra-red sensor) to operate an intruder sensor.

The physical background

The scene depicts the front of a house. A PIR sensor is mounted on the wall of the house, above the path leading across the garden. The data sheet for the PIR shows that it is sensitive to a range of 10 metres, within a cone of angle 100 degrees.

On the System Panel, create:

• a brick wall, represented by a red rectangle, 15mm wide, 120mm high and 120mm deep,

located at coordinates x = 10, y = 0, z = 60,

with rotation settings X = 0, Y = o, Z = 180;

• a path, represented by a grey rectangle, 240mm wide, 100mm high and 0mm deep,

located at coordinatesx = 140mm, y = 0mm, z = 0mm,

with rotation settings of X = -180, Y = 0, Z = -180;

• a cone, couloured light blue, representing the sensing region of the PIR, with width = 70mm, height = 250mm, depth 95mm,

located at coordinates x = 55mm, y = 0mm, z = 80mm,

with rotation settings of X = 0, Y = 55, Z = 180.

• Drag the mouse cursor over these three elements and group them together. This produces 'group 1'.

Give it:

dimensions - width = 12mm, height = 13mm, depth = 15mm;

coordinates - x = -2.2, y = 0.7, z = 22;

rotation - X = 90, Y = 0, Z = 0.

Also on the System Panel, create an intruder, by:

• adding four spheres, and configuruing the properties as follows:

sphere 1 (the head):

dimensions - width = 12mm, height = 13mm, depth = 15mm;

coordinates - x = -2.2, y = 0.7, z = 22;

rotation - X = 90, Y = 0, Z = 0.

sphere 2 (the body):

dimensions - width = 14mm, height = 26mm, depth = 24mm;

coordinates - x = -2.2, y = 0.5, z = 4;

rotation - X = 90, Y = 0, Z = -180.

sphere 3 (the legs):

dimensions - width = 9mm, height = 23mm, depth = 15mm;

coordinates - x = -2.2, y = 1, z = -16;

rotation - X = 90, Y = 0, Z = -180.

sphere 4 (the feet):

dimensions - width = 6mm, height = 15mm, depth = 32mm;

coordinates - x = 1.5, y = 0, z = -25;

rotation - X = 90, Y = 90, Z = 0.

• Drag the mouse cursor over the four spheres and group them together.

• Flowcode

• Experienced

• Students

Adding supplementary code

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Definitions and function declarations:

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Function implementations: