Pins in Use/different from Leonardo - SOLVED

I've been experimenting with a SparkFun MP3 shield, but I can't get the SD card component to work.  Is there any pins in use or not connected compared to a standard Leonardo?  I'm thinking that the NFC reader is using something and interfering in some way.  Ideas?

Update: The only apparent way to get this shield, or similar shields wired for Uno SPI working is to jumper from the ICSP connector to pins 11-13. This connector is in a slightly different place for the KeyDuino, but even a "normal" Uno would have the same problem.

I should note, I tried the Sparkfun MP3 Player and the Arduino Ethernet shield. Both worked on my Uno, neither on my Keyduino. I don't have a true Leonardo to compare.

Hello Andriod,
I see what is your problem. Normaly, the connection for the SPI are done by the ISP connector (2*3 connector).

With the keyduino, due to the antenna, the connector are deported here:


You have two options:
- make the connection between the ISP of your shield and the ISP from keyduino by some jumpers.
or, if your shield is also connected at the pin d13,d12,d11, you can change you code by changing the SPI pin by software SPI.

I can help you if you send me the reference link of your shield

I thought you were onto something, but I took a look and the MP3 shield doesn't even have that ISP connector, much less headers on one, here's a link to it's details if you'd be kind enough to offer another guess: https://learn.sparkfun.com/tutorials/mp3-player-shield-hookup

Maybe it's because they define they define sck,mosi,miso instead of 13,12,11.
These pins for leonardo are on the isp so it couldn't works if you don't make a modification by software spi, I will take a look with the code

Ahh, so a real Leonardo would have the same problem, do you have a link to a fix or shall I let google help me with that?

Ok, I think I found it, in https://github.com/frasermac/sdfatlib/blob/master/SdFat/SdFatConfig.h

#define LEONARDO_SOFT_SPI 0

I'll try setting that to

#define LEONARDO_SOFT_SPI 1

Hi Andriod, does this modification works for you? I also buy a mp3 shield to do a phone controled playlist with a rgb leds strip keep you in touch !

No luck on the simple switch, trying to do the same thing through a few different libraries/techniques.

Hi Andriod, I bought a mp3shield so I can try to solve the spi problem.
If you use some jumper for sck, mosi & miso,it works but I didn't search for a software solution for now.

If you want to do the modification, I will send you a picture of the connection

Bye,
Pierre

Sure, I'm going to detail my attempts to do it with software when I get a chance too.

Ok, still no good, what I'm trying to do to is reset the pins by copying the library into my sketchbook and editing Sd2PinMap.h like this:

Code:

#elif defined(__AVR_ATmega32U4__)
// Leonardo / Keyduino

// Two Wire (aka I2C) ports
uint8_t const SDA_PIN = 2;
uint8_t const SCL_PIN = 3;

// SPI port
[color=#FF0000]uint8_t const SS_PIN = 10;
uint8_t const MOSI_PIN = 11;
uint8_t const MISO_PIN = 12;
uint8_t const SCK_PIN = 13;[/color]

That should just about do it I think, not quite sure what the standard technique is here.

I see that the 13 from the 32u4 is a 10bit pwm, 12&11 are 16bits, so I don't know if it's possible. Can you try the same but with a pwm pin for sck? Like 10 or 9 and use a jumper?

I'm thinking I need to enable SoftSPI still, but not seeing a switch for it yet.

Ok, seeing some notes that it's just plain impossible, can you post your jumpers--if i'ts anything but a plain jumper? I may cut over to my EL shield as a first project.

Hi Andriod, sad to here that

Here is the mapping for the SPI connection:

And you just jumpered it?

Yep, if you don't define d13, d12, d11 woth the sketch it's okay

Ok, got home but haven't rummaged all my parts bins looking for a low profile jumper. Did you have any trouble getting the jumper wires to the ISCP connector? The corner of my MP3 shield is up there, but I'm thinking it may have a date with a Dremel.

In my case, I have removed the plastic of the connector so it fit with the shield

OK! Wired it in and we're in business! Back to my actual project, the personal sound track music box.

Hmm, little trouble with the buzzer being on SCK.  Everytime I reset the board it screams at me.  No problem once the sketch starts though.