John Curran / Mbed 2 deprecated lab1_Digital_Interrupts_JohnCurran_T00214119

Lab Question 1 Digital Interrupts

Dependencies:   mbed

main.cpp@1:80741e2594b1, 2021-04-17 (annotated)

Committer:
johnc89
Date:
Sat Apr 17 10:17:41 2021 +0000
Revision:
1:80741e2594b1
Parent:
0:3899a7a0bffb 
Improved Code 1(d) I included a 'wait' time to improve the layout of screen on Tera -Term

Who changed what in which revision?

UserRevisionLine numberNew contents of line
johnc89 0:3899a7a0bffb 1 #include "mbed.h"
johnc89 0:3899a7a0bffb 2 // Lab1 Digital Interrupts
johnc89 0:3899a7a0bffb 3 //John Curran T00214119
johnc89 1:80741e2594b1 4 // Queston 1 (b)Do you see multiple lines printed even when the joystick is toggled once? Why? Why Not!?
johnc89 1:80741e2594b1 5 // Question 1 (b) Answer : without a 'wait' time i do , however when i introduce a wait time i dont,
johnc89 1:80741e2594b1 6 // and it will just print what direction joystick is pressed on a seperate line
johnc89 1:80741e2594b1 7 // Question 1 (c) What software or hardware solution can be applied to get a decent output?
johnc89 1:80741e2594b1 8 // Question 1 (c) Answer : 'wait' & 'timers' can be used, a capacitor can be used across the switch, 'debounce' can be used
johnc89 1:80741e2594b1 9
johnc89 1:80741e2594b1 10 // This programs prints on Tera Term what direction the joystick is pressed
johnc89 1:80741e2594b1 11 Serial pc(USBTX, USBRX); // serial communications tx, rx
johnc89 0:3899a7a0bffb 12 InterruptIn UP (p15); // Press Up on Joystick
johnc89 0:3899a7a0bffb 13 InterruptIn DOWN (p12); // Press Down on Joystick
johnc89 0:3899a7a0bffb 14 InterruptIn LEFT (p13); // Press Up on Joystick
johnc89 0:3899a7a0bffb 15 InterruptIn RIGHT (p16); // Press Down on Joystick
johnc89 0:3899a7a0bffb 16 InterruptIn CENTRE (p14); // Press Down on Joystick
johnc89 0:3899a7a0bffb 17
johnc89 0:3899a7a0bffb 18 int main ()
johnc89 0:3899a7a0bffb 19 {
johnc89 0:3899a7a0bffb 20
johnc89 0:3899a7a0bffb 21 {
johnc89 0:3899a7a0bffb 22
johnc89 0:3899a7a0bffb 23
johnc89 0:3899a7a0bffb 24 pc.printf ("'LAB 1 DIGITAL INTERRUPTS JOHN CURRAN T00214119'\n\r");//prints text on screen
johnc89 0:3899a7a0bffb 25
johnc89 0:3899a7a0bffb 26
johnc89 0:3899a7a0bffb 27 while (1) { //infinite loop
johnc89 0:3899a7a0bffb 28
johnc89 0:3899a7a0bffb 29 if(UP == 1) {
johnc89 0:3899a7a0bffb 30 pc.printf ("'UP is Pressed'\n\r");//print UP on screen
johnc89 0:3899a7a0bffb 31 }
johnc89 1:80741e2594b1 32
johnc89 0:3899a7a0bffb 33 if(DOWN == 1) {
johnc89 0:3899a7a0bffb 34 pc.printf ("'DOWN is Pressed'\n\r");//print DOWN on screen
johnc89 0:3899a7a0bffb 35 }
johnc89 0:3899a7a0bffb 36 wait (0.5);
johnc89 0:3899a7a0bffb 37 if(LEFT == 1) {
johnc89 0:3899a7a0bffb 38 pc.printf ("'LEFT is Pressed'\n\r");//print LEFT on screen
johnc89 0:3899a7a0bffb 39 }
johnc89 1:80741e2594b1 40
johnc89 0:3899a7a0bffb 41 if(RIGHT == 1) {
johnc89 0:3899a7a0bffb 42 pc.printf ("'RIGHT is Pressed'\n\r");//print RIGHT on screen
johnc89 0:3899a7a0bffb 43 }
johnc89 1:80741e2594b1 44
johnc89 0:3899a7a0bffb 45 if(CENTRE == 1) {
johnc89 0:3899a7a0bffb 46 pc.printf ("'CENTRE is Pressed'\n\r");//print CENTRE on screen
johnc89 0:3899a7a0bffb 47 }
johnc89 1:80741e2594b1 48
johnc89 0:3899a7a0bffb 49
johnc89 0:3899a7a0bffb 50 }
johnc89 0:3899a7a0bffb 51 }
johnc89 1:80741e2594b1 52 }