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Using Go!Socket pin as IO pin

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#1 Kristoffer


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Posted 11 May 2012 - 10:13 AM


Newbie alert!!!!

I've searched this forum and the Internet a lot (and I've probably read the answer, just didn't understand it)

I've worked with Netduino for a short time and driven stepper motors with the BigEasyDriver (BED), no problem. However I would like to use the Netduino Go for my project because of the modules.

But how do I connect my BED? Is it possible to connect it to one of the GO Sockets?

I know I can buy the ShieldBase and use it as a normal Netduino, but can I use GO Socket pin 3-9 as IO's, say, connect
GO Socket pin 3 to BED "dir",
GO Socket pin 4 to BED "step",
GO Socket pin 5 to BED "MS1"
and GO Socket pin 10 would go to BED "gnd"?

If possible, how would I reference the pins in C# code?

If it's unclear, I can provide a sketch of what I mean.

Am I way off?


#2 Chris Walker

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Posted 11 May 2012 - 02:22 PM

Hi Kristoffer,

You could technically do something like this, but the sockets are really meant more as expansion ports than as pins to use directly.

Regarding references to pins...if you take a look at the Netduino Go schematic, you can see which MCU pins go to which socket pins. PA0-PA15 can be referenced as (Cpu.Pin)0x00 through (Cpu.Pin)0x0F. PB0-PB15 can be referenced as (Cpu.Pin)0x10 through (Cpu.Pin)0x1F, and the pattern continues through the PC## pins, PD## pins, etc. (i.e. each port letter takes up 16 pin #s and they're all sequential).

We love hardware you're welcome to go this path...but using the Shield Base is much more straightforward and much simpler. :)


#3 NXTwoThou


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Posted 11 May 2012 - 07:10 PM

Actually, that's pretty cool.

InputPort D0 = new InputPort((Cpu.Pin)0x20, true, Port.ResistorMode.Disabled);

Would be PC0 GPIO_SOCKET1 So if you connect pin 10(GND) to pin 3 on socket 1, you get a trigger. For someone that might just need a single input and has a free socket, that's quick and painless.

I thought I could do the same to PB11 /SPI_CS_SOCKET1(the only other pin that seems to be unique for that socket), but this doesn't seem to work the same for pin 6.

InputPort D1 = new InputPort((Cpu.Pin)0x1b, true, Port.ResistorMode.Disabled);

#4 Kristoffer


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Posted 11 May 2012 - 08:33 PM

Thanks a lot for your replies, I'll look into it. Kristoffer

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