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:
2021-10-01
Revision:
109:b061f9830736
Parent:
108:eee3167b25b4
Child:
110:6360f8487c16

File content as of revision 109:b061f9830736:

/*
Project: 21_Button-v5
File: main.cpp

Toogles LED1 when USER_BUTTON is tapped. Note LED1 is also PA_5 which is
also D13. Based on built-in mbed example Nucleo_read_button. Holding the button 
down will result in LED flashing.

Modified 12 Aug 2017 by Dr. Sheila Ross
Last revised 9/30/21 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()
{
    while(true) { // Main loop.
        if (myButton == 0) { // Button is active low.
            myLed = !myLed; // Toggle LED on/off.
            ThisThread::sleep_for(100);  // Avoid double-tap, 0.1 seconds.
        }
    }
}