Discovery lab school of computing information system florida international university
This presentation is the property of its rightful owner.
Sponsored Links
1 / 32

Computer Science for High School PowerPoint PPT Presentation


  • 95 Views
  • Uploaded on
  • Presentation posted in: General

Discovery Lab School of Computing & Information System Florida International University . Computer Science for High School . Second Day Schedule. First Day Lecture Review Introduction to E mbedded Systems Digital I/O Serial Communication Lunch Discovery Lab Tour Analog I/O

Download Presentation

Computer Science for High School

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Discovery lab school of computing information system florida international university

Discovery Lab

School of Computing & Information System

Florida International University

Computer Science for High School


Second day schedule

SecondDay Schedule

First Day Lecture Review

Introduction to Embedded Systems

Digital I/O

Serial Communication

Lunch

Discovery Lab Tour

Analog I/O

Practice

Q&A


First day lecture review

First Day Lecture Review

Raspberry Pi

Python


Introduction to embedded systems

Introduction to Embedded Systems

  • An embedded system is a computer system with a dedicated function

  • Embedded systems control many devices in common use today

  • Processing Cores

    • microcontrollers or digital signal processors (DSP)

    • ATMega, PIC, ARM, etc.


Variety of embedded systems

Variety of embedded systems

Consumer electronics

Automobiles,

Transportation systems

Medical equipment

Wireless sensor networking

Home Automation


Arduino mbed frdm

Arduino & mBed FRDM

Better Performance

More GPIOs

Accelerometer and Capacitive Slider Sensor

One RGB LED

Open SDA (Open-standard Serial and Debug Adapter)


Frdm architecture

FRDM Architecture


Frdm pin out

FRDM Pin-out


Mbed frdm board development set up

mBed FRDM board Development Set up

Login ID : team00

Password : pw00team

PluginFRDM Board to USB port on PC

https://mbed.org/handbook/Windows-serial-configuration

http://mbed.org/handbook/mbed-FRDM-KL25Z-Getting-Started

http://mbed.org/handbook/mbed-FRDM-KL25Z-Examples


Digital out

  • #include "mbed.h"

  • DigitalOutmyled(LED1);

  • int main() {

  • while(1) {

  • myled = 1;

  • wait(0.2);

  • myled = 0;

  • wait(0.2);

  • }

  • }

Digital Out

* Try to change wait time


Diode

  • The most common function of a diode is to allow an electric current to pass in one direction, while blocking current in the opposite direction

    • Protect circuits from high voltage surges

      - Avalanche diodes

    • Regulate voltage - Zener diodes

    • Electronically tune radio and TV receivers

      - Varicap diodes

    • Generate radio frequency oscillations

      - Tunnel diodes, Gunn diodes, IMPATT diodes

    • Convert light into either current or voltage

      - Photodiode

    • Produce light - Light Emitting Diodes (LED)

Diode


Led light emitting diode

LED (Light Emitting Diode)


Bread board set up

Vertically

5 pin Connected

Vertically

5 pin Connected

Bus

(power line)

Bread Board Set up


Bread board set up1

  • Busser

    • Pin (-)  (e , 1)

    • Pin (+)  (f , 6)

Bread Board Set up


Bread board set up2

  • Ground & Power line Connection

Dual Motor Driver

LED

Voltage Regulator

Bread Board Set up


Bread board set up3

  • Power Connection between Bread Board and FRDM

Power & Ground

Bread Board Set up


Bread board set up4

  • Power Connection between Bread Board and FRDM

Power & Ground

Bread Board Set up


Bread board set up5

  • Connect 4 LEDs

  • White  PTC5

  • Green  PTC6

  • Yellow  PTC10

  • Red  PTC16

Bread Board Set up


Try to make patterns

  • Make LEDs blink with below patterns

  • Make a led-control program which can control 4 leds with different blinking time

    • Using if else

    • Using switch case

W

G

R

Y

Try to make patterns


Computer science for high school

Serial Communcation

  • #include "mbed.h"

  • Serial pc(USBTX, USBRX); // tx, rx

  • PwmOut led(LED1);

  • float brightness = 0.0;

  • int main() {

  • pc.printf("Press 'u' to turn LED1 brightness up, 'd' to turn it down\n");

  • while(1) {

  • char c = pc.getc();

  • if((c == 'u') && (brightness < 0.5)) {

  • brightness += 0.01;

  • led = brightness;

  • }

  • if((c == 'd') && (brightness > 0.0)) {

  • brightness -= 0.01;

  • led = brightness;

  • }

  • }

  • }

Connect to your mbed Microcontroller with a Terminal program

and uses the 'u' and 'd' keys to make LED1 brighter or dimmer


Pulse width modulation

  • What is it?

    • Controlling power to inertial electrical devices

    • Average voltage and current controlled by turning switch

  • What for?

    • Modern electronic power switches

    • The main advantage of PWM is that power loss in the switching devices is very low

    • Relatively low cost

Pulse-width Modulation


Pulse width modulation1

  • Applications

    • Fans

    • Pumps

    • Robotic Servo

    • Stepper Motor

    • Telecommunication

Pulse-width Modulation


Computer science for high school

Pulse Width Modulation

#include "mbed.h"

PwmOutled(LED1);

intmain() {

while(1) {

for(float p = 0.0f; p < 1.0f; p += 0.1f)

{

led = p; wait(0.1);

}

}

}


Computer science for high school

Let’s Make a Ticker

#include "mbed.h"

PwmOutled(LED1);

intmain() {

while(1) {

for(float p = 0.0f; p < 1.0f; p += 0.1f)

{

led = p; wait(0.1);

}

}

}


Computer science for high school

Let’s Make a Ticker

#include "mbed.h"

PwmOutled(LED1);

intmain() {

while(1) {

for(float p = 0.0f; p < 1.0f; p += 0.1f)

{

led = p; wait(0.1);

}

}

}

* Try to connect Buzzer and change delay


Computer science for high school

Analog In

#include "mbed.h"

AnalogInain(p19);

DigitalOutled(LED1);

intmain() {

while (1){

if(ain> 0.3) {

led = 1; } else { led = 0; }

}

}

* Try to connect Buzzer and change delay


Computer science for high school

Analog Out

#include "mbed.h"

AnalogOutsignal(p18);

intmain() {

while(1) {

for(float i=0.0; i<1.0; i+=0.1)

{ signal = i; wait(0.0001);

}

}

}

* Try to connect Buzzer and change delay


Computer science for high school

Import Open Library


Motor driver

  • Dual-H-bridge motor driver: can drive two DC motors

  • Motor supply voltage: 2–11 V

  • Logic supply voltage: 2–7 V

  • Output current: 1.2 A continuous (1.5 A peak) per motor

  • One PWM and One DigitalOut per DC motor

  • Logic High for Enabling This Driver

Motor Driver


Motor driver1

Motor Driver


Step up down voltage regulator

  • Input voltage: 2.7 V to 11.8 V

  • Fixed 5 V output with +5/-3% accuracy

  • Typical continuous output current: 500 mA to 1 A

  • The SHDN pin can be driven low (under 0.4 V) to power down the regulator .

Step-Up/Down Voltage Regulator


Computer science for high school

Q & A


  • Login