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Topics - kstef

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Evaluation Tools / SD card on NHD-FT81X-SHIELD
« on: February 05, 2018, 09:54:02 PM »
Hi, I hope I can get a bit of help;  I'm having trouble getting the SD card reader on my NHD Arduino shield working.  I can't get any response from the sd card using SPI.  I've wired in another reader on top of the shield (using pin D2 instead of pin D5 for the slave select) and I'm able to read from the same card fine with several different sd libraries (none of which work through the NHD shield).  I have the Sketch app working so I can communicate with the screen (NHD 7" with resistive touch) otherwise.

The Card detect line seems to be always connected to ground regardless of whether or not there's a card inserted (though I'm not actually using that signal), but I haven't really been able to test any of the other pins on the card in any meaningful way.

Is it possible that the card reader is bad?  Is there anything else I can check to verify it's operation?

Thanks,
Kevin

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