4 replies to this topic

[Netduinerd]

Hi all, I'm trying to read the SW1 button status while my ND+ is waiting for data on the serial port without success. I did it separately, but I can't do it at the same time. Some suggestion? Thanx in advance. Alberto

[Chris Walker]

Hi Alberto, Have you tried using the DataReceived event instead? That way you can grab data once it arrives, instead of just waiting for it? You could also put some of your code on another thread, so it ran in parallel... Chris

[Netduinerd]

Hi Alberto,

Have you tried using the DataReceived event instead? That way you can grab data once it arrives, instead of just waiting for it?

You could also put some of your code on another thread, so it ran in parallel...

Chris

Hi Chris,
plase find the code underneath:

'Serial port declaration
Private WithEvents NDSerial As SerialPort
...
...

Sub Main()
..
NDSerial.Open()
'Wait for some event rises
Thread.Sleep(Timeout.Infinite)
..
End Sub

...
Private Sub SerialIn() Handles NDSerial.DataReceived


'HERE THE PROBLEM, I DON'T KNOW WHERE PLACE THE FOLLOWING CODE (OR SOMETHING SIMILAR) IN ORDER TO CHECK THE BUTTON STATUS OR BETTER, RISE AN EVENTS WHEN IT HAS BEEN PRESSED

While true
'Read ND+ button status
SW1_Button.Read()
loop

Thanx a lot for ur support!

Alberto

[Dixon]

Hi Netduinerd, You have to declare the switch as InterruptPort, so you will receive an event whenever it changes (as you receive interrupts with serial communication): Private WithEvents SW1 As new InterruptPort(Pins.GPIO_PIN_6, true, Port.ResistorMode.Disabled, Port.InterruptMode.InterruptEdgeHigh)

[Netduinerd]

Hi Netduinerd,

You have to declare the switch as InterruptPort, so you will receive an event whenever it changes (as you receive interrupts with serial communication):

Private WithEvents SW1 As new InterruptPort(Pins.GPIO_PIN_6, true, Port.ResistorMode.Disabled, Port.InterruptMode.InterruptEdgeHigh)

Now it's clear.

Thanx a lot!