November 2012
Intermediate to advanced
496 pages
12h 2m
English
Content preview from Using LEDs, LCDs and GLCDs in Microcontroller ProjectsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Exercises
9.1 An LED is connected to port pin RC0 of a PIC microcontroller. Write a program to flash the LED at a rate of 200 ms.
9.2 8 LEDs are connected to PORT C of a PIC microcontroller. Write a program to flash the odd numbered LEDs (at bit positions 1, 3, 5 and 7).
9.3 8 LEDs are connected to PORT C of a PIC microcontroller. In addition, a push-button switch is connected to port pin RB0. Write a program to turn ON the odd numbered LEDs (at bit positions 1, 3, 5 and 7) when the button is pressed and the even numbered LEDs (at bit positions 0, 2, 4 and 6) if the button is not pressed.
9.4 Design a microcontroller based two dice system. Assume that the dices are connected to PORT B and PORT C of the microcontroller. In addition, a push-button switch is connected to port pin RA0. When the button is pressed, two random dice numbers should be generated and the LEDs should indicate these dice numbers appropriately. The LEDs should remain on for 5 seconds and should then all go OFF to indicate that the system is ready to generate new dice numbers.
9.5 It is required to design an LED based Roulette game with 37 LEDs. Design the circuit diagram of the game. Describe how the LEDs can be controlled using only 7 I/O port pins.
9.6 Explain how the brightness of an LED can be changed by using a PWM signal to drive it.
9.7 Explain how the PWM module of a PIC microcontroller operates. Write a program to generate a PWM signal with an equal MARK to SPACE ratio, having a period of 1500 μs.
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.