IO Button

Archive
1

Hi guys this is a typical noobie question,

I want to use an external button besides the LDR button to control things. How do I go about assigning one of the IO ports as my button. I have been trying to use the schematics and such, but so far I can only get the LDR to not give me an error. Like shown below:

InterruptPort IntButton = new InterruptPort((Cpu.Pin)FEZ_Pin.Digital.LDR, false,
                                                        Port.ResistorMode.PullUp,
                                                        Port.InterruptMode.InterruptEdgeLow);

Thanks for the help!

2

You will need to use the Pin name where you button is connected in place of the first parameter:

FEZ_Pin.Digital.LDR

You also will need to subscribe to the interrupt event so you can execute your button press code.

See section 6.2 in book:

http://www.ghielectronics.com/downloads/FEZ/Beginners%20guide%20to%20NETMF.pdf

Welcome to the forum!

3

Ok cool but.

Say I want to use Digital IO D26. I have tried replacing LDR with IO26 and such, but no luck. How do I find the pin name corresponding to the shields pin name?

Thanks for the welcome!

Dan

4

What board are you using?

5

Panda II … Sorry about that

6

Ok I see. You have selected one of the pins that is not actually interrupt capable.

See the pinout from section FEZ Panda Pins Features in the user manual

http://www.ghielectronics.com/downloads/FEZ/Panda_II/FEZ_Panda_II_UserManual.pdf

Pins that have asterisk in the name (D30* for example) are the ones that Interrupt capable.

7

So try:

(Cpu.Pin)FEZ_Pin.Interrupt.Di30

and connect your button to pin labeled D30 on the board.

EDIT:

Take a note that I am using Fez_Pin.Interrupt enumeration. That way I can see only interrupt capable pins.

8

Sweet! So all I needed was an " i " Haha!

Thanks a lot for the help Architect!

9

You are welcome!