EmbeddedArtists AB / Mbed 2 deprecated lpc812_exp_solution_digital-in

Solutions for the Digital Input experiments for LPC812 MAX

Dependencies:   mbed

main.cpp@2:697cd0c40fbf, 2013-11-22 (annotated)

Committer:
embeddedartists
Date:
Fri Nov 22 09:06:59 2013 +0000
Revision:
2:697cd0c40fbf
Parent:
1:5d12e995c311 
Small fixes

Who changed what in which revision?

UserRevisionLine numberNew contents of line
embeddedartists 0:c81327076cac 1 #include "mbed.h"
embeddedartists 0:c81327076cac 2
embeddedartists 0:c81327076cac 3 DigitalIn button1(D0);
embeddedartists 0:c81327076cac 4 DigitalIn button2(D1);
embeddedartists 0:c81327076cac 5 DigitalOut buzzer(D3);
embeddedartists 0:c81327076cac 6 DigitalOut led(LED_RED);
embeddedartists 0:c81327076cac 7
embeddedartists 0:c81327076cac 8 static void experiment1()
embeddedartists 0:c81327076cac 9 {
embeddedartists 0:c81327076cac 10 led = 1; // Turn LED off
embeddedartists 0:c81327076cac 11
embeddedartists 0:c81327076cac 12 button1.mode(PullUp); // Enable button
embeddedartists 0:c81327076cac 13
embeddedartists 0:c81327076cac 14 // Enter forever loop
embeddedartists 0:c81327076cac 15 while(1) {
embeddedartists 0:c81327076cac 16 // Check if push-button is pressed (input is low)
embeddedartists 0:c81327076cac 17 if (button1.read() == 0) {
embeddedartists 0:c81327076cac 18 led = 0; // Button pressed so turn on LED
embeddedartists 0:c81327076cac 19 } else {
embeddedartists 0:c81327076cac 20 led = 1; // Button not pressed so turn off LED
embeddedartists 0:c81327076cac 21 }
embeddedartists 0:c81327076cac 22 }
embeddedartists 0:c81327076cac 23 }
embeddedartists 0:c81327076cac 24
embeddedartists 0:c81327076cac 25 static void experiment2()
embeddedartists 0:c81327076cac 26 {
embeddedartists 0:c81327076cac 27 led = 1; // Turn LED off
embeddedartists 0:c81327076cac 28
embeddedartists 0:c81327076cac 29 button1.mode(PullUp); // Enable button
embeddedartists 0:c81327076cac 30 button2.mode(PullUp); // Enable button
embeddedartists 0:c81327076cac 31
embeddedartists 0:c81327076cac 32 // Enter forever loop
embeddedartists 0:c81327076cac 33 while(1) {
embeddedartists 0:c81327076cac 34 int state1 = button1.read();
embeddedartists 0:c81327076cac 35 int state2 = button2.read();
embeddedartists 0:c81327076cac 36
embeddedartists 0:c81327076cac 37 // Check if push-button is pressed (input is low)
embeddedartists 0:c81327076cac 38 if (state1 == 0) {
embeddedartists 0:c81327076cac 39 if (state2 == 0) {
embeddedartists 0:c81327076cac 40 // Both pressed so turn off LED/buzzer
embeddedartists 0:c81327076cac 41 led = 1;
embeddedartists 2:697cd0c40fbf 42 buzzer = 1;
embeddedartists 0:c81327076cac 43 } else {
embeddedartists 0:c81327076cac 44 // Only one pressed so turn on LED/buzzer
embeddedartists 0:c81327076cac 45 led = 0;
embeddedartists 2:697cd0c40fbf 46 buzzer = 0;
embeddedartists 0:c81327076cac 47 }
embeddedartists 0:c81327076cac 48 } else {
embeddedartists 0:c81327076cac 49 if (state2 == 0) {
embeddedartists 0:c81327076cac 50 // Only one pressed so turn on LED/buzzer
embeddedartists 0:c81327076cac 51 led = 0;
embeddedartists 2:697cd0c40fbf 52 buzzer = 0;
embeddedartists 0:c81327076cac 53 } else {
embeddedartists 0:c81327076cac 54 // Both pressed so turn off LED/buzzer
embeddedartists 0:c81327076cac 55 led = 1;
embeddedartists 2:697cd0c40fbf 56 buzzer = 1;
embeddedartists 0:c81327076cac 57 }
embeddedartists 0:c81327076cac 58 }
embeddedartists 0:c81327076cac 59 }
embeddedartists 0:c81327076cac 60 }
embeddedartists 0:c81327076cac 61
embeddedartists 0:c81327076cac 62
embeddedartists 0:c81327076cac 63 static void experiment3()
embeddedartists 0:c81327076cac 64 {
embeddedartists 0:c81327076cac 65 bool ledOn = false;
embeddedartists 0:c81327076cac 66
embeddedartists 0:c81327076cac 67 led = 1; // Turn LED off
embeddedartists 0:c81327076cac 68
embeddedartists 0:c81327076cac 69 button1.mode(PullUp); // Enable button
embeddedartists 0:c81327076cac 70
embeddedartists 0:c81327076cac 71 // Enter forever loop
embeddedartists 0:c81327076cac 72 while(1) {
embeddedartists 0:c81327076cac 73
embeddedartists 0:c81327076cac 74 // Check if push-button is pressed (input is low)
embeddedartists 0:c81327076cac 75 if (!button1) {
embeddedartists 0:c81327076cac 76 // Toggle LED
embeddedartists 0:c81327076cac 77 ledOn = !ledOn;
embeddedartists 0:c81327076cac 78 if (ledOn) {
embeddedartists 0:c81327076cac 79 led = 0;
embeddedartists 0:c81327076cac 80 } else {
embeddedartists 0:c81327076cac 81 led = 1;
embeddedartists 0:c81327076cac 82 }
embeddedartists 0:c81327076cac 83
embeddedartists 0:c81327076cac 84 // Wait until push-button is released
embeddedartists 0:c81327076cac 85 while (!button1) {
embeddedartists 0:c81327076cac 86 }
embeddedartists 0:c81327076cac 87 }
embeddedartists 0:c81327076cac 88 }
embeddedartists 0:c81327076cac 89 }
embeddedartists 0:c81327076cac 90
embeddedartists 0:c81327076cac 91 static void experiment4()
embeddedartists 0:c81327076cac 92 {
embeddedartists 0:c81327076cac 93 bool ledOn = false;
embeddedartists 0:c81327076cac 94
embeddedartists 0:c81327076cac 95 led = 1; // Turn LED off
embeddedartists 0:c81327076cac 96
embeddedartists 0:c81327076cac 97 button1.mode(PullUp); // Enable button
embeddedartists 0:c81327076cac 98
embeddedartists 0:c81327076cac 99 // Enter forever loop
embeddedartists 0:c81327076cac 100 while(1) {
embeddedartists 0:c81327076cac 101 // Delay a specified period of time (the sample period)
embeddedartists 1:5d12e995c311 102 wait_ms(10);
embeddedartists 0:c81327076cac 103
embeddedartists 0:c81327076cac 104 // Check if push-button is pressed (input is low)
embeddedartists 0:c81327076cac 105 if (!button1) {
embeddedartists 0:c81327076cac 106 // Toggle LED
embeddedartists 0:c81327076cac 107 ledOn = !ledOn;
embeddedartists 0:c81327076cac 108 if (ledOn) {
embeddedartists 0:c81327076cac 109 led = 0;
embeddedartists 0:c81327076cac 110 } else {
embeddedartists 0:c81327076cac 111 led = 1;
embeddedartists 0:c81327076cac 112 }
embeddedartists 0:c81327076cac 113
embeddedartists 0:c81327076cac 114 // Wait until push-button is released
embeddedartists 0:c81327076cac 115 while (!button1) {
embeddedartists 0:c81327076cac 116 }
embeddedartists 0:c81327076cac 117 }
embeddedartists 0:c81327076cac 118 }
embeddedartists 0:c81327076cac 119 }
embeddedartists 0:c81327076cac 120
embeddedartists 0:c81327076cac 121 int main()
embeddedartists 0:c81327076cac 122 {
embeddedartists 0:c81327076cac 123 //experiment1();
embeddedartists 0:c81327076cac 124 //experiment2();
embeddedartists 0:c81327076cac 125 //experiment3();
embeddedartists 0:c81327076cac 126 experiment4();
embeddedartists 0:c81327076cac 127 }