Write a program that generates TMR0 interrupt signal every 65.5msec. (oscillator frequency is 4MHz) Also handle the interrupt and the interrupt subroutine properly. WDT is a timer, and it has a separate built-in low power oscillator. Its main purpose is to reset the program at overflow. On reset, the program starts from the beginning. Also, by resetting it can wake up a sleeping MC. When a wakeup happens, the program continues from last CLRWDT command. In program WDT can be cleared using CLRWDT command. Pre-Scale Value (PSV) is also applicable to WDT as shown in the datasheet. When PSV is 000 from CLRWDT to overflow WDT takes 18ms. For WDT to work, WDT must be turned on at configurations. When in sleep mode the Micro Processor (MC) stops most of its processes to minimize power consumption. It is important for battery-powered systems. Command SLEEP is to make MC enter Sleep Mode. There are three ways to exit a sleep mode: Manual Reset, External Interrupt Trigger (INTF becomes 1), and WDT overflow. Write a program that contains interrupt subroutine for RB4-RB7 interrupts. In your program your processor sleeps and when an interrupt is received from RB4-RB7 it wakens up and toggles RB0 and goes to sleep mode again. Write the following program. Your processor wakens up every 72msecs and scans PORTA for any input. If an input is available, it activates the alarm device at RB0. Report: It can be written on paper or on a computer (I prefer it to be written on a computer). The report will include: Student Name, Surname, and ID. Calculations Flowchart of the software.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Write a program that generates TMR0 interrupt signal every 65.5msec. (oscillator frequency is 4MHz)
Also handle the interrupt and the interrupt subroutine properly.

WDT is a timer, and it has a separate built-in low power oscillator.

Its main purpose is to reset the program at overflow. On reset, the program starts from the beginning.
Also, by resetting it can wake up a sleeping MC. When a wakeup happens, the program continues from last CLRWDT command.
In program WDT can be cleared using CLRWDT command.
Pre-Scale Value (PSV) is also applicable to WDT as shown in the datasheet. When PSV is 000 from CLRWDT to overflow WDT takes 18ms.
For WDT to work, WDT must be turned on at configurations.

When in sleep mode the Micro Processor (MC) stops most of its processes to minimize power consumption. It is important for battery-powered systems.

Command SLEEP is to make MC enter Sleep Mode.
There are three ways to exit a sleep mode: Manual Reset, External Interrupt Trigger (INTF becomes 1), and WDT overflow.

Write a program that contains interrupt subroutine for RB4-RB7 interrupts. In your program your processor sleeps and when an interrupt is received from RB4-RB7 it wakens up and toggles RB0 and goes to sleep mode again.
Write the following program. Your processor wakens up every 72msecs and scans PORTA for any input. If an input is available, it activates the alarm device at RB0.
Report: It can be written on paper or on a computer (I prefer it to be written on a computer). The report will include:
Student Name, Surname, and ID.
Calculations
Flowchart of the software.

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