Reference no: EM131148635
Design with Microcontrollers
Lab: Timers and Pulse-Width Modulators
Starting with the code snippet, develop the following enhancements as part of your program. The combination entered by the user must be processed one button-push at a time.
• If in the UNLOCKED state, the user must be able to lock the system by pushing ‘1' anytime.
• Limit the number of unsuccessful attempts allowed by locking out the user permanently after three consecutive failed attempts. In this state, the system must not respond any more to user input. (For extra credit, you may implement a SUPERVISOR state in which the system can only be unlocked by a supervisor using a different five-digit code.)
• Impose a time limit on entering the correct combination in that after the user enters the first symbol of the combination, he or she has five seconds to enter the entire sequence. If the time expires during this process, the user has to enter the entire code again from the beginning.
• Finally, the finite-state machine developed in the function assumes that the combination to the lock is hard-coded. Relax this assumption by extending the functionality of the program to accept new combinations at run time as follows. In the UNLOCKED state, the user must be able to push the button ‘2' to reprogram a new five-digit combination for the system. The system displays a
Enter New Key:
prompt on the terminal. After a new five-digit code is entered, the screen displays
Enter Key Again to Confirm:
and the user enters the code again. If the code is confirmed, system goes back to the UNLOCKED state and the new key is used from hereon. Otherwise the system displays an error and remains in the UNLOCKED state while maintaining the old key. During the reprogramming
phase, the LED blinks.
Attachment:- Lab-Timers and Pulse-Width Modulators.pdf
|
Indicate whether each statement is true or false
: One reason managers use the full cost of products as the cost base in their pricing decisions is to promote price stability.- When there is price discrimination, pricing is not linked closely to the cost of the product.
|
|
Prepare the cash budget for iguana
: Iguana, Inc., manufactures bamboo picture frames that sell for $30 each. - Compute the budgeted cash payments for Iguana.- Prepare the cash budget for Iguana.
|
|
Conduct external research from reputable and quality sources
: Write a report on how relevant legislation, codes of practice, ethical principles, and national standards affect marketing operations - Briefly describe the following statistical methods and techniques to evaluate marketing opportunities, including..
|
|
Describe the importance of rare earth elements in science
: Describe the importance of rare earth elements in science and technology. Assess the most common uses of these elements, particularly as encountered in your daily life, as well as projections for future demand of these minerals resources.
|
|
Impose a time limit on entering the correct combination
: Impose a time limit on entering the correct combination in that after the user enters the first symbol of the combination, he or she has five seconds to enter the entire sequence.
|
|
What is the monthly total cost equation
: razier Manufacturing Company collected the following production data for the past month:- If the high-low method is used, what is the monthly total cost equation?
|
|
What would you expect to happen to the yield to maturity
: Based on the material you learn in this Phase, what would you expect to happen to the yield to maturity and market value of the bonds if the time to maturity was increased or decreased by 5 years
|
|
Develop a work breakdown structure for the project
: Evaluate the four projects by preparing a weighted decision matrix using the template provided. Develop at least four criteria, assign weights to each criterion, assign scores, and then calculate the weighted scores. Write a one-page paper that de..
|
|
The purpose motivating regulators to impose interest ceiling
: What was the purpose motivating regulators to impose interest ceilings on bank savings accounts? What effect did this eventually have on the money markets?
|