Hello,
I have two key functions: one to select and open a folder within an SDcard one to select play an audio file.
I have both of these within:
void loop() {
buttonInit();
updateIO();
displayInit();
if(directoryPath == "") // -> How can I get it say that this is false?
{
getFolder();
}
else if(filePath == "") // *= folderNames[4]* OR give it directoryPath == "Drums"?
{
getFile();
}
else
{
homeScreen();
}
}
My aim is that once the directoryPath has been found, it should proceed to grab the filePath which can then be assigned to a pad. However, it always believes that no directory has been found and so never moves onto the else if statement. My specific question is, why does it always fail to see that a directoryPath has been found?
(Here is the whole of the code)
#include <SD.h>
#include <SPI.h>
#include <Bounce2.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Audio.h>
#include <string>
#include "displayFunctions.h"
Adafruit_SSD1306 display(128, 64, &Wire, -1);
#define MOSI_PIN 11
#define SCK_PIN 13
#define CS_PIN = BUILTIN_SDCARD
void homeScreen();
void printDirectory(File dir, int numTabs);
void buttonInit();
void updateIO();
bool checkWav(String wav);
#define maxNumCharDisplay 80
int led = 28;
const char *folderNames[] = { "Drums", "Vocals", "Pads", "Misc" };
Bounce selectButton = Bounce(36, 10);
Bounce returnButton = Bounce(37, 10);
const byte pins[] = {28, 29, 30, 31, 32, 33, 34, 35};
const byte numOfPads = sizeof(pins);
Bounce padPad[numOfPads];
File root;
File currentDirectory;
File entry;
String dirArray;
String directoryPath;// = "/Presets/";
String filePath; //-> copy this into ch array ?
bool selectedFolder;
int folderChoice;
int fileChoice;
int numTabs;
char presetFolderName[] = "/Presets/";
String fileExtension = ".wav";
int assignedPad = -1;
AudioPlaySdWav playWav;
void setup() {
buttonInit();
updateIO();
displayInit();
Serial.begin(9600);
SPI.setMOSI(MOSI_PIN);
SPI.setSCK(SCK_PIN);
if (!(SD.begin(BUILTIN_SDCARD))) {
while (1) {
Serial.println("unable to access SD card.");
}
}
homeScreen(); // Display list of preset folders
AudioMemory(8); // buffer for how much memory to provide
playWav.stop();
}
void loop() {
buttonInit();
updateIO();
displayInit();
//char presetFolderName[0];
//sprintf(presetFolderName, '\0');
//if(strlen(presetFolderName) > 0) // -> How can I get it say that this is false? - && presetFolderName == '\0'
if(directoryPath == "")
{
getFolder();
}
//else if(strlen(presetFolderName) < 0) // *= folderNames[4]* OR give it directoryPath == "Drums"?
else if(filePath == "")
{
getFile();
}
else
{
homeScreen();
}
}
void getFolder() // this should return/input a String (folder name) -> Although, the folderNames are const chars? if a const char
{
dirArray = directoryPath;
//strcat(dirArray, PresetFolderName); // concatenate /Presets/ with directory path -> should this happen later?
for (uint8_t i = 0; i < directoryPath.length(); i++) // for the whole length of the String
{
//Serial.println("line 142");
//Serial.println(dirArray[i]); //
}
if (directoryPath == "") { // if no directory has been selected
while (!selectButton.update()) {}
if (selectButton.fallingEdge()) {
//int folderChoice = readInt(1, 4); // -> do the same as^ by changing int into a ch Array
//int folderChoice; // keeps track of which folder has been selected -> should this be -1? -> could just say -1 here instead of further down
char folderChoiceChar[maxNumCharDisplay + sizeof(char)];
sprintf(folderChoiceChar, "%d", folderChoice); // But how do I get it to read from 1-4? -> for loop
for (int i = 0; i < 3; i++) {
folderChoice = folderChoiceChar[i]; //should the folderChoiceChar be tracked with an index? -> yes
}
dirArray = presetFolderName;
dirArray += folderNames[folderChoice];
File folder;
folder = SD.open(dirArray.c_str());
//folder = SD.open(directoryPath.c_str()); // Does this open straight to ...^ "directoryPath = "/Presets + folderName;"
if(folder.isDirectory()){ //
while (true) //Does this loop & print twice?
{
File entry = folder.openNextFile(); // I think, because it's just 'openNextFile' whilst Drums is a directory -> it will keep looping on the drums directory until all files are printed.
if (!entry)
{
break;
}
display.clearDisplay();
display.setTextColor(SSD1306_WHITE); // Draw white text
display.setCursor(0, 0);
Serial.println("---LOOP START---");
display.println(folder.name()); // this prints: e.g. "Drums" - How to print multiple??
Serial.println(folder.name());
display.setCursor(12, 0);
display.println(":");
for(uint8_t i = 0; i < numTabs; i++)
{
display.println('\t'); // This line should print vertically
}
display.println(entry.name()); // And this prints the audio - but only 1 file - how can we print multiple?
Serial.println(entry.name());
if(entry.isDirectory()) // This is if it is a folder not a file -> not necessary?
{
display.println("/");
}
else
{
Serial.println("");
}
entry.close();
Serial.println("---LOOP END^--");
break; // -> this work in only printing 1 audio file - now how multiple?
}
Serial.println(sizeof(directoryPath), DEC); // prints the no. of bytes directoryPath takes up
Serial.println(" bytes");
}
folder.close();
display.display();
}
//WRITE OUT OF BOUNDS IF PRESETFOLDERNAME IS LONGER THAN 0 CHARS. - HOW?
}
}
void getFile()
{
//char samplesArr[filePath.length() + 1]; // change path from string to Char arry -> think the +1 is becuase of the NULL character at the end
//strcpy(samplesArr, filePath.c_str()); // copy String directoryPath into destination dirArray
String samplesArr = filePath;
for (uint8_t i = 0; i < filePath.length(); i++) //
{ //
}
if (filePath == "") // if directory has been selected but no audio file, proceed. I think filePath has to be more defined before^
// Currently just saying, if String filePath is nothing -> must make it so that filePath = charArray
{
while (!selectButton.update()) {}
if (selectButton.fallingEdge() && checkWav(filePath)) // -> AND if .wav?
{
char fileChoiceChar[maxNumCharDisplay + sizeof(char)];
sprintf(fileChoiceChar, "%d", fileChoice); // But how do I get it to read from 1-4? -> for loop
for (int i = 0; i < 3; i++) {
fileChoice = fileChoiceChar[i]; //should the folderChoiceChar be tracked with an index? -> yes
}
samplesArr = dirArray; // -> ???
samplesArr += dirArray[fileChoice]; // -> what should I change folderNames to?
display.clearDisplay();
display.setCursor(0, 0);
display.println("Assign to pad:");
for (int i = 0; i < numOfPads; i++) {
display.print(i + 1);
display.print(". Pad ");
display.print(i);
}
display.display();
}
} else if (assignedPad == -1) { // Definitley have to do some joining of assignedPad = filePath?
for (int i = 0; i < numOfPads; i++) {
if (padPad[i].update() && padPad[i].fallingEdge()) {
assignedPad = -1; // should this be -1?
display.clearDisplay();
display.setCursor(0, 0);
display.print("Assigned to pad: ");
display.println(assignedPad + 1);
display.display();
}
}
}
else {
for (int i = 0; i < numOfPads; i++) {
if (padPad[i].update() && padPad[i].fallingEdge() && i == assignedPad) {
playWav.play(filePath.c_str());
break;
}
}
}
}
void homeScreen()
{
while (!returnButton.update()){}
if(returnButton.fallingEdge())
{
display.clearDisplay();
display.setCursor(0, 0);
display.println("Select a directory:");
for (int i = 0; i < 4; i++) {
display.print(i + 1);
display.print(". ");
display.println(folderNames[i]);
}
display.display();
}
}
void printDirectory(File dir, int numTabs) {
while (true) {
File entry = dir.openNextFile();
if (! entry) {
// no more files
break;
}
for (uint8_t i = 0; i < numTabs; i++)
{
display.print('\t');
}
display.print(entry.name());
if (entry.isDirectory())
{
display.println("/");
printDirectory(entry, numTabs + 1);
} else
{
}
entry.close();
}
}
bool checkWav(String wav)
{
if (wav.endsWith(fileExtension))
{
return true; // Return true if file ends with wav
}
else
{
return false; // Return false if file does not
}
}
void displayInit() {
display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS);
display.clearDisplay();
display.setTextSize(1); // Normal 1:1 pixel scale
display.setTextColor(SSD1306_WHITE); // Draw white text
display.setCursor(0, 0);
}
void buttonInit() {
pinMode(36, INPUT_PULLUP); // select button
pinMode(37, INPUT_PULLUP); // return button
for(byte i = 0; i < numOfPads; i++)
{
padPad[i].attach(pins[i], INPUT_PULLUP);
padPad[i].interval(5); // debounce time
}
//for (int i = 0; i < numOfPads; i++) {
// int pin = pins[i];
// pinMode(pin, INPUT_PULLUP);
// Bounce *bb = new Bounce(pin, debounce);
// padPtrs[i] = bb;
//}
//pinMode(35, INPUT_PULLUP);
/*
for(int i = 28; i <= 35; i++) // From pad[0-8] could I say from pins 28-35
{
padButtons[i-28].attach(i, INPUT_PULLUP);
}
*/
pinMode(led, OUTPUT);
}
void updateIO()
{
selectButton.update();
returnButton.update();
for(byte i = 0; i < numOfPads; i++)
padPad[i].update();
// for (int i = 0; i < numOfPads; i++) {
// Bounce padPad = *padPtrs[i]; // Do I need to define Bounce padPad as an global array?
// padPad.update();
//if(padPad.fallingEdge())
//{
//Serial.print("Pad: ");
//Serial.print(i);
//}
// }
// padButtons.update();
//button2.update();
}
I have tried stating (!(directoryPath == "")) as well as if directoryPath = one of the folderNames. as well as providing the void directoryPath(with a const char) to represent one of the folder names as this is what will be returned. I have also tried stating within void loop that if(strlen(presetFolderNames) > 0) { getFolder()}.
