Competitive VEX Robot Designer. Terminal Objective 5.1: program functions for VEX Robots

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1 Skill Set 5: Programmer II Competitive VEX Robot Designer Terminal Objective 5.1: program functions for VEX Robots Performance Objective: Using a bumper switch, line follower, and potentiometer, program functions to allow a robot to follow a line, touch a wall, raise a crane and then terminate. Enabling Objectives: describe the purpose and benefits of a function match associated terms that define and describe functions describe why functions are used create code that develops a function draw a flow chart for using a bumper switch, line follower, and potentiometer Laboratory Hardware: The following materials and hardware are required and unique to this lesson: Modified VEX Protobot easyc V4 for Cortex Learning Activities: 1. View PowerPoint presentation and complete Activity Sheet 5.1 Program Functions for VEX Robots. Formative Evaluation: Activity Sheet 5.1 Program Functions for VEX Robots will be used to assess student progress. The answers to Activity Sheet 5.1 are as follows: Matching 1. A 2. E 3. B 4. A 5. C 6. I Developed by Trevor Robinson Lesson 5.1 page 1

2 Short Answer 7. Void RobotArm() If pot < 500 Motor 3, Robot(); 9. A function is a portion of code within a larger program that performs a specific task and is relatively independent of the remaining code. The benefits of a function can be readability, usability, and neatness. 10. The program calls the function Drive_Foward, in the function the robot moves until a bumper switch is depressed. Once the button is depressed the function ends and returns to Autonomous where the program terminates. Summative Evaluation: Performance Assessment 1.3, Programming functions for VEX controller will be used to measure the performance objective. In addition, the following test items could be used to measure the enabling and terminal objectives on a unit or end-of-level test: 1. Which of the following symbols should be used for demonstrating a function call in a flow chart? A. square B. diamond C. oval D. circle 2. Which of the following can be a benefit of using functions compared to placing the code in the main function? A. allows the processor to process math quicker B. reusability C. neatness, readability, and more reliable D. allows the programmer to store code they may not use all the time 3. In which mode do I program a function call? A. autonomous B. main C. initiate Developed by Trevor Robinson Lesson 5.1 page 2

3 D. from a function that I have created 4. Which of the following functions are written for efficiency and is not able to pass and return values? A. Void Example_Function(Void) B. Void Example_Function(int) C. int Example_Function(Void) D. int Example_Function(int) Developed by Trevor Robinson Lesson 5.1 page 3

4 Performance Assessment 5.1 Name: Start Date: Skill Set 5: Programmer II Terminal Objective 5.1: program functions for VEX robots Performance Objective: Using a bumper switch, line follower, and potentiometer, program functions to allow a robot to follow a line, touch a wall, raise a crane and then terminate. Performance Assessment Elements Acceptable Unacceptable 1. Robot traverses the course a) Robot follows line b) Robot touches a wall c) Robot raises the crane and terminates when the wall is touched 2. Each step in element one is a created function. Note: All items must receive an acceptable rating to pass the objective. Evaluator: Date: Developed by Trevor Robinson Lesson 5.1 page 4

5 Activity Sheet 5.1 Program Functions for VEX Robots Name: Date: Directions: Match the description or purpose of the items in the left column with the best selection from the list of items in the right column by writing the corresponding letter in the space provided. 1. Code that represents a function call 2. Benefit of a function 3. A function allows 4. Example of a function call 5. Example of a function header 6. Functions that don t pass values could be called A. Drive(); B. Subroutines C. Void Drive(void) D. Function Call E. Efficiency F. Readability G. Code to become reusable Short Answer Directions: Write your answer in the space provided. 7. Create code to build a function that allows the robot arm to rise? 8. Create code to demonstrate a function call that initiates the function in question 8. Developed by Trevor Robinson Lesson 5.1 page 5

6 9. Define a function and describe the benefits of using functions? 10. Explain the flow chart below Developed by Trevor Robinson Lesson 5.1 page 6

Competitive VEX Robot Designer. Terminal Objective 5.2: program functions to accept values

Skill Set 5: Programmer II Competitive VEX Robot Designer Terminal Objective 5.2: program functions to accept values Performance Objective: Using an ultrasonic range sensor and optical quad encoder, program