Question What happens if I open some D pin on shield base as output, then in some period of time reassign it as input?
Is it going to work? Does it require specific actions?
Thanks
Shield base pins reassignment
Started by eplaksienko, Apr 23 2013 03:47 PM
9 replies to this topic
#2
Chris Walker
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Posted 23 April 2013 - 10:41 PM
Hi eplaksienko,
Just dispose of the OutputPort when you don't need it anymore...and then you can open that pin as an InputPort, InterruptPort, etc.
You can also use TristatePort...which lets you switch between input and output modes on the fly.
Chris
#3
eplaksienko
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Posted 24 April 2013 - 01:50 PM
Thanks Chris
Actually, about disposal, what the quickest way to do it in NETMF? I am C++ person 
and C# and Java behavior make me always puzzled about it
#4
Chris Walker
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Posted 24 April 2013 - 10:23 PM
Here's an example...Actually, about disposal, what the quickest way to do it in NETMF? I am C++ person
// initialize the pin...OutputPort pinD1 = new OutputPort(Pins.GPIO_PIN_D1, false);// use the pin...pinD1.Write(true);// now dispose of the pin so that you can use it as an InputPort, etc.pinD1.Dipose();That's pretty much it! Chris
#5
neslekkim
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Posted 24 April 2013 - 10:54 PM
No support for:
using( OutputPort PinD1 =new.....) {
pinD1.Write...
}
??
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Asbjørn
#6
Chris Walker
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Posted 25 April 2013 - 01:01 AM
Hi neslekkim,
You could also go that route if it works well in your code flow.
Chris
#7
eplaksienko
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Posted 26 April 2013 - 02:18 PM
Chris, I get exception on dispose
#8
Chris Walker
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Posted 26 April 2013 - 03:01 PM
Hi eplaksienko,
Could you please share your code? What exception is being raised? ChrisChris, I get exception on dispose
#9
eplaksienko
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Posted 26 April 2013 - 03:36 PM
Thread.Sleep(5000);
ShieldBase sb = new ShieldBase((GoBus.GoSocket)4);
OutputPort op1 = new OutputPort(sb.Pins.GPIO_PIN_D1, false);
InputPort ip1 = new InputPort(sb.Pins.GPIO_PIN_D3, false, ResistorModes.Disabled);
op1.Write(true);
Thread.Sleep(5000);
op1.Dispose();
ip1.Dispose();
OutputPort op2 = new OutputPort(sb.Pins.GPIO_PIN_D3, false);
op2.Write(true);
InputPort ip2 = new InputPort(sb.Pins.GPIO_PIN_D1, false, ResistorModes.Disabled);
Thread.Sleep(5000);
#10
eplaksienko
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Posted 26 April 2013 - 03:37 PM
A first chance exception of type 'System.Exception' occurred in Microsoft.SPOT.Hardware.dll
An unhandled exception of type 'System.Exception' occurred in Microsoft.SPOT.Hardware.dll
on [color=rgb(40,40,40);font-family:helvetica, arial, sans-serif;]op1.Dispose();[/color]
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