When trying to run the SdFat "QuickStart" example, and sending "9" (or 8 or 4 or 10) for the chip select pin number, I get: Is the card correctly inserted?īut when I tried first sending 6, then 9, it worked! No card, wrong chip select pin, or SPI problem? The FilePlayer example returned: Can't access SD card. I'm had some strange "Can't access SD card" problems, and solved it by initializing the MP3 Chip Select pin (6) first, then the SD Chip Select pin (9). This trouble-shooting has taken me several hours. I have verified the pins on the MP3Shield are clear of debris, and no shorts. I have verified that changing SD_SEL, SPI_FULL_SPEED, and SPI_HALF_SPEED in SFEMP3ShieldConfig.h does not fix the issue. I have verified that the MP3Shield also reports the same error with other FAT32 and FAT16 formatted class 10 microSD cards 1GB and 64GB. I have verified the error with the MP3Shield connected to another Arduino Uno. I have confirmed pin continuity with a DMM. I have re-flowed my solder joints to ensure proper connection. The library is installed as described here.Īfter loading the "SFEMP3Shield>Examples>FilePlayer.ino" file to the RedBoard, the Arduino serial monitor (at 115200 baud) reports:įree RAM = 2166 Should be a base line of 1029, on ATmega328 when using INTx I am using this SFEMP3Shield library because the recommended one did not compile with Arduino 1.8.13 on Windows 10 Pro. I have one MP3 file saved to the microSD card, and renamed to "track001.mp3". I carefully soldered the headers (PRT-00116) on the MP3 shield, according to the Technical Assistance page. I have a v15 board (DEV-12660) connected to a RedBoard (DEV-13975) and a class 10 microSD card (COM-15051) formatted as FAT32.
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