Hey,
I want my arduino uno to play one of 10 Wav files as soon as it starts. Not always the same, but always a random one. I use an SD card module with the TMRpcm code stuff, which also works very well. I would be happy if someone has a solution!
char toPlay[11]; // string array for file to play 00.WAV to 99999.WAV
// then pass this function a random in the range of the files you have
makeName(randNumber,0); // generate file name in global array toPlay
void makeName(int number, int depth){ // generates a file name 0.WAV to 9999.WAV suppressing leading zeros
if(number > 9) {
makeName(number / 10, ++depth); // recursion
depth--;
number = number % 10; // only have to deal with the next significant digit of the number
}
toPlay[indexToWrite] = (number & 0xf) | 0x30;
indexToWrite++;
if(depth > 0) return; // return if we have more levels of recursion to go
else { // finish off the string with the wave extesion
toPlay[indexToWrite] = '.';
toPlay[1+indexToWrite] = 'W';
toPlay[2+indexToWrite] = 'A';
toPlay[3+indexToWrite] = 'V';
toPlay[4+indexToWrite] = '\0'; // terminator
indexToWrite = 0; // reset pointer for next time we enter
}
}
(By the way, I've already tried this code, but it didn't work ...)
Yeah, I already looked though the internet for answers and I tried your code.
I removed the random generator part, but here is my code:
#include <SD.h> // need to include the SD library
//#define SD_ChipSelectPin 53 // example uses hardware SS pin 53 on Mega2560
#define SD_ChipSelectPin 10 // using digital pin 10 on arduino uno 328, can use other pins
#include <TMRpcm.h> // also need to include this library...
#include <SPI.h>
TMRpcm tmrpcm;
void setup()
{
tmrpcm.speakerPin=9; //5,6,11 or 46 on Mega, 9 on Uno, Nano, etc
//Complimentary Output or Dual Speakers:
//pinMode(10,OUTPUT); Pin pairs: 9,10 Mega: 5-2,6-7,11-12,46-45
Serial.begin(9600);
if(!SD.begin(SD_ChipSelectPin))
{
Serial.println("SD fail");
return;
}
tmrpcm.setVolume(6);
tmrpcm.play("1.wav");
And I used your code bc I haven't found anything else and I have no clue how to generate random stuff. I hope u know what I mean...
For just a single digit file name, get a number between 0 and 9 , and then turn it into an ASCII character 0 to 9 and then concatenate it to the file name array.
Like this:-
(number & 0xf) | 0x30;
In fact that is what that function of mine actually does.
So put it all together and you get:-
#include <SD.h> // need to include the SD library
//#define SD_ChipSelectPin 53 // example uses hardware SS pin 53 on Mega2560
#define SD_ChipSelectPin 10 // using digital pin 10 on arduino uno 328, can use other pins
#include <TMRpcm.h> // also need to include this library...
#include <SPI.h>
TMRpcm tmrpcm;
char toPlay[11]; // string array for file to play 00.WAV to 99999.WAV
int indexToWrite = 0; // place to write in toPlay array
void setup()
{
tmrpcm.speakerPin=9; //5,6,11 or 46 on Mega, 9 on Uno, Nano, etc
//Complimentary Output or Dual Speakers:
//pinMode(10,OUTPUT); Pin pairs: 9,10 Mega: 5-2,6-7,11-12,46-45
Serial.begin(9600);
if(!SD.begin(SD_ChipSelectPin))
{
Serial.println("SD fail");
return;
}
// randomSeed() will then shuffle the random function.
randomSeed(analogRead(0));
int randNumber = random(9); // random number between 0 and 9
makeName(randNumber, 0); // generate file name
tmrpcm.setVolume(6);
tmrpcm.play(toPlay);
}
void loop(){
// fill this with what you want to do after the start
}
void makeName(int number, int depth){ // generates a file name 0.WAV to 9999.WAV suppressing leading zeros
if(number > 9) {
makeName(number / 10, ++depth); // recursion
depth--;
number = number % 10; // only have to deal with the next significant digit of the number
}
toPlay[indexToWrite] = (number & 0xf) | 0x30;
indexToWrite++;
if(depth > 0) return; // return if we have more levels of recursion to go
else { // finish off the string with the wave extesion
toPlay[indexToWrite] = '.';
toPlay[1+indexToWrite] = 'W';
toPlay[2+indexToWrite] = 'A';
toPlay[3+indexToWrite] = 'V';
toPlay[4+indexToWrite] = '\0'; // terminator
indexToWrite = 0; // reset pointer for next time we enter
}
}
