Using GPIOs with the PicoMOD4

adamp · Apr 28th 2010

Hi,

I'm trying to configure the PicoMOD 4's unused GPIOs but have not been very successful.

I would like a particular IO (IO17, pin 46) to be high on startup. It seems to default to low on startup.

The registry settings I've used are:

reg open \drivers\builtin\DigitalIO\
reg set value UseAsIO hex 00,00,00,01,00,00
reg set value DataDir hex 00,00,00,01,00,00
reg set value DataInit hex 00,00,00,01,00,00
reg save

But this has no effect.

I've used 00,00,00,01,00,00 for the parameter for UseAsIO, DataDir and DataInit as IO17 should be on the 17th bit.

Anyone have any ideas?

Thanks

fs-support_ZU · Apr 28th 2010

Hello,
sorry the feature for using "hex" values is not implemented until now. As a workaround (and also in future) you may use "DWORD" values. For example:

Code

reg set value UseAsIOA dword 0x...
reg set value UseAsIOB dword 0x...
....

instead of

Code

reg set value UseAsIO hex 00, ...
...

CoreSystems · Apr 29th 2010

So far I have:

Code

reg open \drivers\builtin\DigitalIO\
reg set value Port dword 2
reg set value Debug dword 4
reg set value UseAsIOA dword 0x00000100
reg set value DataDirA dword 0x00000100
reg set value DataInitA dword 0x00000100
reg save

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This should make bit 17 and output and configure it to be on but the output on the PicoMOD has not switched on.

Is there something I'm missing here?

fs-support_ZU · Apr 29th 2010

No, this (0x100) assigns bit9 and start is not bit1 but bit0!
So 0x10000 assigns bit17.

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