Reply To: Problems with Sparkfun MP3 straight from the box

[Michael P. Flaga]

In the SdFat examples there are some test sketch’s. It may blank the SdCard.

I expect you have no other shields attached, as they may adverse affect.

It smells like the problem is between the DREQ pin of the MP3 chip and the D2 of the Arduino. POLLing lock up tells us that. And the Multimeter measurements of 0V, 3V and 1.8V lets us know it sounds like it is behaving as expected. But can not quite tell with out an oscilloscope, etc…

This is where I turn to having spares to swap out and make comparisons.

You may want to find some button examples and independently verify D2 is working on the Arduino. Then the attachInterrupt command and verify the INT1 is working on the chip.