Once the program is loaded, create a new user, or select a

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Introduction to Programming RIS 2.0 RCX Code
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Starting the RCX Programming Environment

• Double Click on the RCX icon
• Once the program is loaded, create a new user, or
  select an existing one
• Click on Program
• Click on Freestyle

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Starting the RCX Programming Environment
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Mission 1 Drive Forward (with Timer)

• Go Forward for 5 seconds
• Stop

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Saving your work

• Go to File
• Click on Save
• Type in File Name. i.e. First Mission

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Downloading and Running

• 5 different programs can be loaded onto the RCX
  at once
• Select which slot you want to use by clicking on
  Settings and selecting one of the 5 slots
• Make sure that the robots IR port is facing
  towards the IR tower, and click Download
• When the download is finished, you will hear a
  beep
• You can now run the program by pressing the grey
  Prgm button on the RCX to select the slot you
  programmed
• And press the green Run button

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Driving in Reverse

• Use the Set Direction block under Small
  Blocks

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• After changing the directions, turn on the motors
  for 3 seconds

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Turning

• Set the direction of one motor to Forward and
  the direction of the other motor to Back

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Repeat For

• Play a beep 3 times
• Uses the Repeat For block.
• Repeat For specifies the number of times a
  certain action is to be performed.
• i.e. Repeat Beep For 3 Times

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Repeat For
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Light Sensor

• Mounted to the front of the robot, facing the
  ground
• Allows detection of lines, white or black, as
  well as detecting lamps, lasers, and other
  light sources
• Use the View button on the robot to view the
  light sensor value over the black line. Remember
  or write down this value.

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Using the light sensor

• Select Wait Until from the Wait column
• Select Light and click Next
• Select Input Port to which the light sensor is
  connected. Press Next.
• Select Bright if looking for white line, Dark
  if looking for black line. Press Next.

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• Click on Manual and enter a value for the line.
  Usually its the value from using the View
  button 5 for a white line, or the value from
  using the View button 5 for a black line

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Mission 2 Detect Edge

• When the light sensor detects an edge, beep three
  times

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Mission 3 Detect Light and Beep

• When the light sensor detects a bright light
  source, beep
• Repeat forever

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Mission 4 Drive Forward and Stop

• Go forward until the edge of the board/table
• Stop

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Mission 4 Solution
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Touch Sensor

• Touch sensor is attached to the bumper
• When the bumper is pressed the touch sensor is
  activated

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Using the Touch Sensor

• Turn on the motors
• Select the Wait Until block from the Wait
  column or Repeat Until from the Repeat column
• Make sure Touch is selected and press Next
• Choose Input Port to which the touch sensor is
  connected, and press Next
• Make sure Press is selected, which will allow
  the robot to react when the touch sensor is
  pressed. Press Next again.
• Press Done
• Turn off the motors

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Mission 5 Touch Sensor

• If the touch sensor is pressed once, turn on the
  left motor
• If the touch sensor is pressed twice, turn off
  the left motor, and turn on the right motor
• If the touch sensor is pressed three times, turn
  on both motors
• If the touch sensor is pressed four times turn
  both motors off
• Repeat Forever

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Mission 6 Yes or No Statements

• If the Light Sensor is detecting the edge then
  play Beep 1
• Otherwise play Beep 2
• Repeat Forever

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Mission 7 Right-Handed Line Follow with Touch
Sensor

• If light sensor sees black - turn right,
  otherwise turn left
• Repeat the process until the bumper is hit
• Stop

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Mission 7 Right-Handed Line Follow with Touch
Sensor
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Mission 8 Line Follow and Stop

• Follow the black line, until robot reaches edge
  of the board
• Stop

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Mission 8 Line Follow and Stop
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Mission 9 Left-Handed Line Follow

• If light sensor sees black - turn left, otherwise
  turn right
• Repeat the process until the bumper is hit
• Stop

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Mission 9 Left-Handed Line Follow
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Mission 10 Sensor Stacking

• Stack touch sensor on top of light sensor
• Follow the line, when touch sensor is activated
  stop.

When the stacked touch sensor is pressed the
value on Port 2 will read 100. When the touch
sensor is not pressed the value for the light
sensor will be read.
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Mission 10 Sensor Stacking
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Sensor Stacking With Tasks
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Mission 11 Line Counter with Variables

• Go forward
• Count each line as the robot crosses it
• When the robot crosses the 3rd line, stop.
• Uses variables to count number of lines

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Mission 11 Line Counter with Variables
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Mission 12 Proximity Sensor (simple method)

• Use the IR Transmitter and Light sensor to create
  a Proximity Sensor
• Constantly generate IR messages, and use the
  Light Sensor to detect the reflected IR beam

() There is another better method to check
fluctuations of the light intensity
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Mission 13 IR Communications

• One RCX is sending a message, the other is
  receiving it
• Confirm that the message has been received by
  beeping

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Transmitter Solution
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Receiver Solution
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• This PowerPoint will be posted online at
  http//www.robofest.net/resources.htm