EmbeddedArtists AB
/
lpc812_exp_solution_digital-in
Solutions for the Digital Input experiments for LPC812 MAX
main.cpp
- Committer:
- embeddedartists
- Date:
- 2013-11-22
- Revision:
- 2:697cd0c40fbf
- Parent:
- 1:5d12e995c311
File content as of revision 2:697cd0c40fbf:
#include "mbed.h" DigitalIn button1(D0); DigitalIn button2(D1); DigitalOut buzzer(D3); DigitalOut led(LED_RED); static void experiment1() { led = 1; // Turn LED off button1.mode(PullUp); // Enable button // Enter forever loop while(1) { // Check if push-button is pressed (input is low) if (button1.read() == 0) { led = 0; // Button pressed so turn on LED } else { led = 1; // Button not pressed so turn off LED } } } static void experiment2() { led = 1; // Turn LED off button1.mode(PullUp); // Enable button button2.mode(PullUp); // Enable button // Enter forever loop while(1) { int state1 = button1.read(); int state2 = button2.read(); // Check if push-button is pressed (input is low) if (state1 == 0) { if (state2 == 0) { // Both pressed so turn off LED/buzzer led = 1; buzzer = 1; } else { // Only one pressed so turn on LED/buzzer led = 0; buzzer = 0; } } else { if (state2 == 0) { // Only one pressed so turn on LED/buzzer led = 0; buzzer = 0; } else { // Both pressed so turn off LED/buzzer led = 1; buzzer = 1; } } } } static void experiment3() { bool ledOn = false; led = 1; // Turn LED off button1.mode(PullUp); // Enable button // Enter forever loop while(1) { // Check if push-button is pressed (input is low) if (!button1) { // Toggle LED ledOn = !ledOn; if (ledOn) { led = 0; } else { led = 1; } // Wait until push-button is released while (!button1) { } } } } static void experiment4() { bool ledOn = false; led = 1; // Turn LED off button1.mode(PullUp); // Enable button // Enter forever loop while(1) { // Delay a specified period of time (the sample period) wait_ms(10); // Check if push-button is pressed (input is low) if (!button1) { // Toggle LED ledOn = !ledOn; if (ledOn) { led = 0; } else { led = 1; } // Wait until push-button is released while (!button1) { } } } } int main() { //experiment1(); //experiment2(); //experiment3(); experiment4(); }