Homework Help is Here – Start Your Trial Now!
Engineering
Computer Engineering
Explain the following code. What is the purpose of the keyword volatile and why is it necessary: #define PORTB (*(volatile unsigned char *)0x25) Write a function in c called: GPIOToggle(int MyPort, char MyBitMask) MyPort is a number from 0-5, Representing PORTA through PORTF. MyBitMask is an 8 bit char with "1"s in positions of the pins you wish to toggle. For example, if: MyPort= 1, MyBitMask =18 = Ob00010010 we would want to toggle PORTB pins 1 and 4 Make sure you don't assume any registers have known contents.

Explain the following code. What is the purpose of the keyword volatile and why is it necessary: #define PORTB (*(volatile unsigned char *)0x25) Write a function in c called: GPIOToggle(int MyPort, char MyBitMask) MyPort is a number from 0-5, Representing PORTA through PORTF. MyBitMask is an 8 bit char with "1"s in positions of the pins you wish to toggle. For example, if: MyPort= 1, MyBitMask =18 = Ob00010010 we would want to toggle PORTB pins 1 and 4 Make sure you don't assume any registers have known contents.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
See similar textbooks
icon
Related questions
Question

THIS IS FOR THE ATMEGA32u4 MICROCONTROLLER. DO NOT USE PIN MODE, INTERRUPTS, DIGITAL WRITE. INSTEAD, USE THE SCHEMATIC ALONG WITH THE DATA SHEET OF THE STATED CONTROLLER. I HAVE PASTED THE PICTURE OF THE SCHEMATIC HERE AS WELL AS ATTACHED THE DATA SHEET.

(Here is the link for the schematic: https://learn.adafruit.com/assets/31914)

(Here is the link for the data sheet: https://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-7766-8-bit-AVR-ATmega16U4-32U4_Datasheet.pdf)

(FOR THE DATA SHEET, PAY SPECIAL ATTENTION TO PAGES 415 - 417 AS THOSE ARE THE PAGES THAT STATE THE DDR, PORT, AND OTHER VALUES IN HEX THAT WILL BE USED IN THE SOLN.)

 

 

Explain the following code. What is the purpose of the keyword volatile and why is it necessary: #define PORTB (*(volatile unsigned char *)0x25) Write a function in c called: GPIOToggle(int MyPort, char MyBitMask) MyPort is a number from 0-5, Representing PORTA through PORTF. MyBitMask is an 8 bit char with "1"s in positions of the pins you wish to toggle. For example, if: MyPort= 1, MyBitMask =18 = Ob00010010 we would want to toggle PORTB pins 1 and 4 %3D Make sure you don't assume any registers have known contents.
Transcribed Image Text:Explain the following code. What is the purpose of the keyword volatile and why is it necessary: #define PORTB (*(volatile unsigned char *)0x25) Write a function in c called: GPIOToggle(int MyPort, char MyBitMask) MyPort is a number from 0-5, Representing PORTA through PORTF. MyBitMask is an 8 bit char with "1"s in positions of the pins you wish to toggle. For example, if: MyPort= 1, MyBitMask =18 = Ob00010010 we would want to toggle PORTB pins 1 and 4 %3D Make sure you don't assume any registers have known contents.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
Computer Networking: A Top-Down Approach (7th Edi…
Computer Networking: A Top-Down Approach (7th Edi…
Computer Engineering
ISBN:
9780133594140
Author:
James Kurose, Keith Ross
Publisher:
PEARSON
Computer Organization and Design MIPS Edition, Fi…
Computer Organization and Design MIPS Edition, Fi…
Computer Engineering
ISBN:
9780124077263
Author:
David A. Patterson, John L. Hennessy
Publisher:
Elsevier Science
Network+ Guide to Networks (MindTap Course List)
Network+ Guide to Networks (MindTap Course List)
Computer Engineering
ISBN:
9781337569330
Author:
Jill West, Tamara Dean, Jean Andrews
Publisher:
Cengage Learning
Concepts of Database Management
Concepts of Database Management
Computer Engineering
ISBN:
9781337093422
Author:
Joy L. Starks, Philip J. Pratt, Mary Z. Last
Publisher:
Cengage Learning
Prelude to Programming
Prelude to Programming
Computer Engineering
ISBN:
9780133750423
Author:
VENIT, Stewart
Publisher:
Pearson Education
Sc Business Data Communications and Networking, T…
Sc Business Data Communications and Networking, T…
Computer Engineering
ISBN:
9781119368830
Author:
FITZGERALD
Publisher:
WILEY
SEE MORE TEXTBOOKS