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Wolfson could have given us GPIO access

gramuk

Wolfson card arrived. Ok so I saw the pictures that the GPIO pins are not accessible with the card fitted - so why did they do this then?

I've now got to risk de-soldering and replacing the connector on this so far unpowered board. I see no reason why they couldn't put a connector on there to give access to the GPOI - I mean - due to the design now space is not an issue and a few extra pennies to the cost would I'm sure not be an issue. Ok so now to butcher my new board. Bin at the ready.

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  • Because they use most of the GPIO pins to control they card.  Look at the schematic.  The ones they don't use are brought out to the 3 pin header, normally used as a serial port.

  • in reply to davenwr

    Thanks for reply - Yes I've just looked at that right now. Ah well. One day maybe I'll look into using the board but for now another expansion board for the bits and pieces drawer. I really only ordered this from Farnell to bump up the order cost (minimum order price) since I needed a few parts for an audio application I'm putting together for an Arduino. Never mind.

  • in reply to gramuk

    as mentioned in the GPIO pins thread, the serial pins can be remapped for IO. Runs fine with my app. Of course it only provides 2 IO pins and it is only an option if you don't require the serial port.

     

    There are two GPIO labelled pins on the wolfson audio card extension header. Availability as GPIO and driver support is currently unclear. A response by Wolfson would be welcome...

     

    Additional GPIO ports might also be added by i2c based extensions, but this will require to somehow get access to the required i2c pins.

  • in reply to Former Member

    Yes those I2C pins are the ones I need access to. Maybe I'll get round to changing out that main connector sometime. If I get some time tomorrow I'll try out the card to see how it runs and then then try to add a couple of I2C devices later on. I should have researched the board before just buying it but it was a spur of the moment purchase.

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  • in reply to Former Member

    Yes those I2C pins are the ones I need access to. Maybe I'll get round to changing out that main connector sometime. If I get some time tomorrow I'll try out the card to see how it runs and then then try to add a couple of I2C devices later on. I should have researched the board before just buying it but it was a spur of the moment purchase.

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