4) Write an assembly program that turns on the LED as soon as BTNO is pressed and turns it off as soon as it is released. The program must also use TIMERO timer to measure the duration of pressing the button and print this duration in milliseconds in the terminal window upon the button release. The program must be capable to measure the duration up to 100 seconds. Make sure to process GPIO and TIMERO hardware interrupts by using interrupt handlers and NVIC, so no flags polling.

4) Write an assembly program that turns on the LED as soon as BTNO is pressed and turns it off as soon as it is released. The program must also use TIMERO timer to measure the duration of pressing the button and print this duration in milliseconds in the terminal window upon the button release. The program must be capable to measure the duration up to 100 seconds. Make sure to process GPIO and TIMERO hardware interrupts by using interrupt handlers and NVIC, so no flags polling.

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

See similar textbooks

Similar questions

Number 3 please
An ADC produces an interrupt request and the interrupt service routine runs and acquires a burst of data of 10 data values into a global array. What is a good way for the ISR to tell the main program there is new data in the array? Set a global flag variable. Do nothing. The main program has to check if the data array has changed. Pass the array as a return value from the ISR. Clear the interrupt flag in the ADC.
The interrupt vector table at the kernel's entry point stores what information?
What's the difference between an interrupt handler and a memory-resident programme?
Define a new interrupt (Interrupt number 80H). The interrupt service routine for this interrupt will ask the user to enter 2 numbers A and B(each is between 0 and 9), then it will print one of the following statements: - "A > B" - "A < B" - "A = B" TASM
3
Suppose you are using SysTick in a busy-waiting method to periodically read a sensor value every 0.25 ms (i.e., initially, you are not using interrupts, but rather you are using a while busy-wait loop). a) Suppose you measured the microcontroller current and found it to be 200mA. If the microcontroller core voltage is 3.3V, what would be the microcontroller power consumption during the busy-waiting for the PWM method? Answer format: floating-point with at least two decimal places: Answer Watts. b) Suppose you were not happy with the power consumption of the busy-waiting method. Therefore, you decided to implement periodic interrupt with SysTick. You write a SysTick ISR handler consisting of 400 instructions long. Suppose the microcontroller CPI average is 1.5. How many clock cycles does it take to execute your ISR handler? Answer format: integer Answer c) How long doe it take to execute your ISR in microseconds if SysTick and the microcontroller are running at 48 MHz? Answer μs c)…
Create a program that utilizes the timer interrupt and the pin change interrupt in order to measure the frequency of a periodic signal on Port Pin D4. You can do this by saving and then clearing a counter each time the timer interrupt occurs (at a rate of once per second). Additionally, you can increment the counter by the number of low-to-high and high-to-low transitions on pin D4 with the pin change interrupt. Your main loop should monitor when the timer interrupt goes off, and then write the frequency to the serial port for the user to see. Note: your setup function should call your two initialization functions, and then enable global interrupts in the SREG register
The interrupt vector table at the kernel's entry point stores what information?
What does the truncated version of the interrupt service procedure look like on a computer?
Interrupts have a purpose, but what is it? What exactly is the difference between an interrupt and a trap? Is it feasible for a user program to intentionally build traps? If so, what is the cause behind this?
What makes Interrupt stand apart from a regular interruption is its name. Explain why problems with the hardware are so surprising.