Arduino code help.

Question

I'm in the middle of an arduino project and I need help with the push buttons I'm using.

I need to be able to push a button that tells the arduino to set the LED value to 1 but not have the LED light up,

I also need there to be another button that makes all the push buttons that HAVE BEEN PRESSED light up.

Any help with the code or any resources that can help me are very much appreciated!

If this is not possible please tell me!

Former Member · Answer

byte leds[10]; void reset() { for(int led=0; led<10; led++) { leds[led] = 0; digitalWrite(led, LOW); } } void set(int led) { if(led < 10 && led >= 0) leds[led] = 1; } void enableleds() { for(int led=0; led<10; led++) if(leds[led] ==1) digitalWrite(led, HIGH); } when a button is pressed have it call set passing it's led number when the reset button is pressed have it call the reset function when the enable button is pressed call the enableleds function Message was edited by: William Main changed to use digitalWrite (instead of pin which is for a different MCU library)

afmishaq · Answer

You don't have to add any chips for now. I will write the sequence of things and then you can write the code yourself. I am sure you can write the code to light an LED on the press of a button. Let us start with a simle example of 4 buttons and 2 leds. The leds are led1 and led2. The buttons are btn1, btn2, btn-go and btn-rst. Normally, when btn1 is pressed you turn on led1. But here is what you want to do: - When btn1 is pressed you just mark that led1 will be turned on - When btn2 is pressed you just mark that led2 will be turned on - When the btn-go is pressed you turn on all the leds which have been marked to be turned on - When btn-rst is pressed you turn off all leds and set mark states to off You will need to define one memory variable to mark the state for each led, let us call them mrk1 and mrk2 Now here is the code you have to write: to start with: mrk1=0 mrk2=0 on btn1 press: mrk1=1 on btn2 press: mrk2=1 on btn-go press: if mrk1=1, light led1 if mrk2=1, light led2 on btn-rst press: turn off led1 turn off led2 mrk1=0 mrk2=0 Hopefully, you can write and understand this code. Once you do it you will understand the other code, too. Just ask for more help if you have any problem.

Arduino code help.

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