I'm trying to follow a few guides, such as this one, to play a wav file using an arduino nano. My code is below. The problem is that the speaker correctly plays the tone, upon starting (with the tone and delay methods), but then when it calls tmrpcm.play(), I don't get any sound. I'm not sure what the problem is.
One notable change to the circuit is that instead of a transistor, I'm using a 2N7000 MOSFET. I've got Source -> Ground, Gate -> D9, Drain -> Speaker-, Speaker+ -> 3V. (Sorry, I don't know how to properly draw a circuit diagram). My circuit seems to function fine as a plain tone is played without issue, it's just the music file that won't play.
Here's my code
/*
SD card test
This example shows how use the utility libraries on which the'
SD library is based in order to get info about your SD card.
Very useful for testing a card when you're not sure whether its working or not.
The circuit:
SD card attached to SPI bus as follows:
** MOSI - pin 11 on Arduino Uno/Duemilanove/Diecimila
** MISO - pin 12 on Arduino Uno/Duemilanove/Diecimila
** CLK - pin 13 on Arduino Uno/Duemilanove/Diecimila
** CS - depends on your SD card shield or module.
Pin 4 used here for consistency with other Arduino examples
created 28 Mar 2011
by Limor Fried
modified 9 Apr 2012
by Tom Igoe
*/
// include the SD library:
#include <SPI.h>
#include <SD.h>
#include <TMRpcm.h>
TMRpcm tmrpcm;
// set up variables using the SD utility library functions:
Sd2Card card;
SdVolume volume;
SdFile root;
// change this to match your SD shield or module;
// Arduino Ethernet shield: pin 4
// Adafruit SD shields and modules: pin 10
// Sparkfun SD shield: pin 8
// MKRZero SD: SDCARD_SS_PIN
const int chipSelect = 4;
void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.print("\nInitializing SD card...");
// we'll use the initialization code from the utility libraries
// since we're just testing if the card is working!
if (!card.init(SPI_HALF_SPEED, chipSelect)) {
Serial.println("initialization failed. Things to check:");
Serial.println("* is a card inserted?");
Serial.println("* is your wiring correct?");
Serial.println("* did you change the chipSelect pin to match your shield or module?");
while (1);
} else {
Serial.println("Wiring is correct and a card is present.");
}
// print the type of card
Serial.println();
Serial.print("Card type: ");
switch (card.type()) {
case SD_CARD_TYPE_SD1:
Serial.println("SD1");
break;
case SD_CARD_TYPE_SD2:
Serial.println("SD2");
break;
case SD_CARD_TYPE_SDHC:
Serial.println("SDHC");
break;
default:
Serial.println("Unknown");
}
// Now we will try to open the 'volume'/'partition' - it should be FAT16 or FAT32
if (!volume.init(card)) {
Serial.println("Could not find FAT16/FAT32 partition.\nMake sure you've formatted the card");
while (1);
}
Serial.print("Clusters: ");
Serial.println(volume.clusterCount());
Serial.print("Blocks x Cluster: ");
Serial.println(volume.blocksPerCluster());
Serial.print("Total Blocks: ");
Serial.println(volume.blocksPerCluster() * volume.clusterCount());
Serial.println();
// print the type and size of the first FAT-type volume
uint32_t volumesize;
Serial.print("Volume type is: FAT");
Serial.println(volume.fatType(), DEC);
volumesize = volume.blocksPerCluster(); // clusters are collections of blocks
volumesize *= volume.clusterCount(); // we'll have a lot of clusters
volumesize /= 2; // SD card blocks are always 512 bytes (2 blocks are 1KB)
Serial.print("Volume size (Kb): ");
Serial.println(volumesize);
Serial.print("Volume size (Mb): ");
volumesize /= 1024;
Serial.println(volumesize);
Serial.print("Volume size (Gb): ");
Serial.println((float)volumesize / 1024.0);
Serial.println("\nFiles found on the card (name, date and size in bytes): ");
root.openRoot(volume);
// list all files in the card with date and size
root.ls(LS_R | LS_DATE | LS_SIZE);
tone(9,440,1000);
delay(2000);
tone(9,440,1000);
delay(2000);
Serial.println(tmrpcm.isPlaying());
tmrpcm.speakerPin = 9;
tmrpcm.setVolume(4);
tmrpcm.play("1.WAV");
Serial.println(tmrpcm.isPlaying());
}
void loop(void) {
}
And the output:
Initializing SD card...Wiring is correct and a card is present.
Card type: SDHC
Clusters: 953472
Blocks x Cluster: 64
Total Blocks: 61022208
Volume type is: FAT32
Volume size (Kb): 30511104
Volume size (Mb): 29796
Volume size (Gb): 29.10
Files found on the card (name, date and size in bytes):
SYSTEM~1/ 2020-05-22 16:53:12
WPSETT~1.DAT 2020-05-22 16:53:12 12
INDEXE~1 2020-05-22 16:53:14 76
1.WAV 2014-01-11 06:44:14 32056
0
1