Initial steps in the problem-solving process

1. One of the initial steps in the problem-solving process is to understand the problem. What steps do you think an information technologist would take to solve a problem?

If you do an online search, you will find a wealth of information on ‘system approach’.

2. What are some problems that the Industry has faced, and how have they overcome them?

For some examples, what problems has the computer industry had to endure in light of security issues? How about challenges faced in the Space Industry?

3. In the industry, how do Network Engineers, Software Engineers, Hardware Engineers work with and inter-operate with each other?

4. Given your areas of interest you might have, what industry sectors you might want to work in, what areas of learning do you feel might be important to learn about?
5. Discuss the features and control of the LCD. Discuss features and control of the keypad. Research LCD modules—what are the different types of LCD modules, and how do you control them? Research the keypad—what are different configurations of the keypad and the technique used to interface to them?

6. Share your ideas and thoughts on how the LCD and keypad might be used by graduates of your degree program (BMET, CET, EET, REET).

Page 252, problems 1–5

1.
Indicate what data type you would use for the following variables:
• (a) the temperature
• (b) the number of days in a week
• (c) the number of days in a year
• (d) the number of months in a year
• (e) the counter to keep the number of people getting on a bus
• (f) the counter to keep the number of people going to a class
• (g) an address of 64K RAM space
• (h) the age of a person
• (i) a string for a message to welcome people to a building
2.
Give the hex value that is sent to the port for each of the following C statements:
• (a) PORTB=14;
• (b) PORTB=0x18;
• (c) PORTB=′A′;
• (d) PORTB=7;
• (e) PORTB=32;
• (f) PORTB=0x45;
• (g) PORTB=255;
• (h) PORTB=0x0F;
3.
Give two factors that can affect time delay code size in the HCS12 microcontroller.
4.
Of the two factors in Problem 3, which can be set by the system designer?
5.
Can the programmer set the number of clock cycles used to execute an instruction? Explain your answer.
Pages 430–431, problems 1–9, 21–25

1.
The LCD discussed in this section has _______ (4, 8) data pins.
2.
Describe the function of pins E, R/W, and RS in the LCD.
3.
What is the difference between the VCC and VEE pins on the LCD?
4.
“Clear LCD” is a __________ (command code, data item) and its value is ___ hex.
5.
What is the hex value of the command code for “display on, cursor on”?
6.
Give the state of RS, E, and R/W when sending a command code to the LCD.
7.
Give the state of RS, E, and R/W when sending data character ‘Z’ to the LCD.
8.
Which of the following is needed on the E pin in order for a command code (or data) to be latched in by the LCD?
• (a) H-to-L pulse
• (b) L-to-H pulse
9.
True or false. For the above to work, the value of the command code (data) must already be at the D0–D7 pins.
21.
In reading the columns of a keyboard matrix, if no key is pressed we should get all ______ (1s, 0s).
22.
In Figure 12-6, to detect the key press, which of the following is grounded?
• (a) all rows
• (b) one row at time
• (c) both (a) and (b)
Figure 12-6. Matrix Keyboard Connection to Ports
23.
In Figure 12-6, to identify the key pressed, which of the following is grounded?
• (a) all rows
• (b) one row at time
• (c) both (a) and (b)
24.
Indicate the steps to detect the key press.
25.
Indicate the steps to identify the key pressed.

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