3 switches 1 reset

[siliconchip]

hi all i have 3 leds and a switch assigned to each led only 1 led can be lit at any time if another led is required to be on then using a reset button common to all 3 leds this extinguishes the led and the button for the required led can be pressed to light it, trouble is i cannot get led 3 to light also on hardware is does not work although in flowcode sim the first two leds work i have tried in a previous flowchart using decision icons in stead of the switch but any button would extinguish the led any help please

[medelec35]

Hi siliconchip,
Can you give this a try please.

I have deleted the unused variables so u know what variable are involved.

Martin

[siliconchip]

hi martin thanks for the reply i have just used your version on hardware (mikroelektronika easy pic 5 board ) it is working some of the time but occasionally if a button is pressed 2 leds will light instead of 1

[medelec35]

Hi siliconchip,
Your welcome.

I have just set my hardware up so Switches connected to port A & LEDs connected to port B.
unfortunately I can't get more than one LED on at the same time
Can you tell me which switch you pressed to get more than one LED on please so I can see if I replicate the issue.
Could you have a hardware fault like two shorting LEDs?

[siliconchip]

i got 2 leds on by pressing button A0 and same thing happened on A1 button not sure about the shorting on my board so tried a night rider led program as a test and this worked ok

[medelec35]

Odd. I can't get mine to play up.
Just in case I have missed something.I have altered Flowchart to make it impossible for more than 1 LED to be on.
Can you try this one please.
No debouncing is required since as soon as any of the on switches are detected, all switches except reset are locked out.

Martin

[siliconchip]

hi martin just tried the flowchart using hardware and it works great there is no interferance from other switches with leds etc and its working a treat once again a big thankyou i now understand the masking concept a little better

[medelec35]

Hi siliconchip,
Your welcome

Glad latest one is working better for you.
Thanks for letting us know.

Martin