Charles Tritt / Mbed OS 21_ButtonImproved_v5

Initial version. Illuminates the LED when the user button is held down. Otherwise, the LED is off. Variation on 21_Button_v5.

main.cpp

Committer:
CSTritt
Date:
2021-10-05
Revision:
110:6360f8487c16
Parent:
109:b061f9830736
Child:
111:2d91fe50a8cc

File content as of revision 110:6360f8487c16:

/*
Project: 21_ButtonImproved_v5
File: main.cpp

Turns LED1 on when USER_BUTTON is held down. Otherwise LED1 is off.

Modified 12 Aug 2017 by Dr. Sheila Ross
Last revised 10/5/21 by Dr. C. S. Tritt
*/

#include "mbed.h"

// Construct a digital input linked to the USER_BUTTON.
DigitalIn myButton(USER_BUTTON); // Built in blue button.

// Construct a digital output linked to LED1.
DigitalOut myLed(LED1); // Built-in green LED.

int main()
{
    myLed = 0; // Start with LED off (the default)
    while(true) { // Main loop.
        if (!myButton) { // Button is active low.
            myLed = 1; // Turn LED on.
            while (!myButton);  // Wait here for button release.
            myLed = 0; // Turn LED back off.
        }
    }
}