Replace SD card storage with on-board Flash filesystem (FFat), allocating 9MB internal storage partition for keepsakes

sound_picture_app/Audio_Player.cpp

@@ -1,5 +1,6 @@
 #include "Audio_Player.h"
 #include "Audio.h"
+#include "FFat.h"
 
 static Audio audio;
 static TaskHandle_t audioTaskHandle = NULL;
@@ -27,7 +28,7 @@ void initAudioPlayer() {
 // ── Public controls ───────────────────────────────────────────────────────────
 void playAudio(const char* fullPath) {
   printf("Audio: playing %s\r\n", fullPath);
-  audio.connecttoFS(SD_MMC, fullPath);
+  audio.connecttoFS(FFat, fullPath);
 }
 
 void playMemoryAudio(int memoryIndex) {

sound_picture_app/Display_PNG.cpp

@@ -7,7 +7,7 @@ static int16_t ypos = 0;
 
 // ── PNG callbacks ─────────────────────────────────────────────────────────────
 static void* pngOpen(const char* filePath, int32_t* size) {
-  Image_file = SD_MMC.open(filePath);
+  Image_file = FFat.open(filePath);
   if (!Image_file) { printf("PNG: failed to open %s\r\n", filePath); return nullptr; }
   *size = Image_file.size();
   return &Image_file;

sound_picture_app/SD_Card.cpp

@@ -16,28 +16,22 @@ int  g_timezoneOffset      = 0;
 bool g_timeSynchronized    = false;
 int  g_favoriteMemoryId    = -1;
 
-// ── SD Init ───────────────────────────────────────────────────────────────────
+// ── SD Init (Now Internal Flash FFat Init) ───────────────────────────────────
 void SD_Init() {
-  if (!SD_MMC.setPins(SD_CLK_PIN, SD_CMD_PIN, SD_D0_PIN, SD_D1_PIN, SD_D2_PIN, SD_D3_PIN)) {
+  if (!FFat.begin(true)) {
-    printf("SD MMC: Pin change failed!\r\n");
+    printf("Internal Flash (FFat) initialization failed!\r\n");
     return;
   }
-  if (!SD_MMC.begin("/sdcard", false, true)) {
+  printf("Internal Flash (FFat) mounted successfully!\r\n");
-    printf("SD card initialization failed!\r\n");
-    return;
-  }
-  printf("SD card OK (4-bit mode)\r\n");
-  uint8_t cardType = SD_MMC.cardType();
-  if (cardType == CARD_NONE) { printf("No SD card attached\r\n"); return; }
 
-  uint64_t total = SD_MMC.totalBytes();
+  uint64_t total = FFat.totalBytes();
-  uint64_t used  = SD_MMC.usedBytes();
+  uint64_t used  = FFat.usedBytes();
   SDCard_Size = total / (1024 * 1024);
-  printf("SD: %llu MB total, %llu MB used\r\n", total/(1024*1024), used/(1024*1024));
+  printf("Internal Flash storage: %llu MB total, %llu MB used\r\n", total/(1024*1024), used/(1024*1024));
 
   // Ensure required directories exist
-  if (!SD_MMC.exists("/photos")) SD_MMC.mkdir("/photos");
+  if (!FFat.exists("/photos")) FFat.mkdir("/photos");
-  if (!SD_MMC.exists("/audio"))  SD_MMC.mkdir("/audio");
+  if (!FFat.exists("/audio"))  FFat.mkdir("/audio");
 }
 
 void Flash_test() {
@@ -59,7 +53,7 @@ bool Config_Load() {
   g_currentIndex = 0;
   g_volume       = 12;
 
-  File f = SD_MMC.open(CONFIG_PATH, "r");
+  File f = FFat.open(CONFIG_PATH, "r");
   if (!f) {
     printf("Config: no config file found, starting fresh\r\n");
     return true; // not an error — first boot
@@ -137,7 +131,7 @@ bool Config_Load() {
 }
 
 bool Config_Save() {
-  File f = SD_MMC.open(CONFIG_PATH, "w");
+  File f = FFat.open(CONFIG_PATH, "w");
   if (!f) {
     printf("Config: failed to open for writing\r\n");
     return false;
@@ -181,9 +175,9 @@ bool Config_Delete_Memory(int id) {
       // Optionally delete the files from SD
       char path[80];
       snprintf(path, sizeof(path), "/photos/%s", g_memories[i].photo);
-      SD_MMC.remove(path);
+      FFat.remove(path);
       snprintf(path, sizeof(path), "/audio/%s",  g_memories[i].audio);
-      SD_MMC.remove(path);
+      FFat.remove(path);
 
       // Shift array down
       for (int j = i; j < g_memoryCount - 1; j++)
@@ -201,7 +195,7 @@ bool Config_Delete_Memory(int id) {
 
 // ── Legacy helpers ─────────────────────────────────────────────────────────────
 bool File_Search(const char* directory, const char* fileName) {
-  File dir = SD_MMC.open(directory);
+  File dir = FFat.open(directory);
   if (!dir) return false;
   File file = dir.openNextFile();
   while (file) {
@@ -214,7 +208,7 @@ bool File_Search(const char* directory, const char* fileName) {
 
 uint16_t Folder_retrieval(const char* directory, const char* fileExtension,
                            char File_Name[][100], uint16_t maxFiles) {
-  File dir = SD_MMC.open(directory);
+  File dir = FFat.open(directory);
   if (!dir) { printf("Folder not found: %s\r\n", directory); return 0; }
 
   uint16_t count = 0;

sound_picture_app/SD_Card.h

@@ -2,15 +2,7 @@
 #include "Arduino.h"
 #include <cstring>
 #include "FS.h"
-#include "SD_MMC.h"
+#include "FFat.h"
-
-// SD card MMC pins (4-bit mode, fully compatible now LCD_CS is on GPIO 42)
-#define SD_CLK_PIN    14
-#define SD_CMD_PIN    15 
-#define SD_D0_PIN     16
-#define SD_D1_PIN     18
-#define SD_D2_PIN     17 
-#define SD_D3_PIN     21 
 
 #define MAX_MEMORIES  50
 #define MAX_NAME_LEN  64

sound_picture_app/Web_Server.cpp

@@ -989,7 +989,7 @@ static void handleUploadFile(const String& subdir, bool (*validator)(const Strin
       return;
     }
     pendingUploadPath = "/" + subdir + "/" + fname;
-    uploadFile = SD_MMC.open(pendingUploadPath, "w");
+    uploadFile = FFat.open(pendingUploadPath, "w");
     uploadSuccess = (bool)uploadFile;
     if (uploadSuccess) uploadedFilename = fname;
     printf("Upload: writing to %s\r\n", pendingUploadPath.c_str());
@@ -1170,7 +1170,7 @@ void initWebServer() {
     }
     if (name.isEmpty()) { server.send(404, "text/plain", "Not found"); return; }
     String path = "/photos/" + name;
-    File f = SD_MMC.open(path, "r");
+    File f = FFat.open(path, "r");
     if (!f) { server.send(404, "text/plain", "Not found"); return; }
     server.streamFile(f, "image/png");
     f.close();
@@ -1181,7 +1181,7 @@ void initWebServer() {
     if (uri.startsWith("/photo/")) {
       String name = uri.substring(7);
       String path = "/photos/" + name;
-      File f = SD_MMC.open(path, "r");
+      File f = FFat.open(path, "r");
       if (f) {
         String ct = name.endsWith(".png") ? "image/png" : "image/jpeg";
         server.streamFile(f, ct);