feat: enhance fat type support

add EXFAT type support available since FatFS R0.12c.

Signed-off-by: Frederic Pillon <frederic.pillon@st.com>

Author: fpistm

examples/CardInfo/CardInfo.ino

@@ -56,15 +56,26 @@ void setup() {
 
   // Now we will try to open the 'volume'/'partition' - it should be FAT16 or FAT32
   if (!fatFs.init()) {
-    Serial.println("Could not find FAT16/FAT32 partition.\nMake sure you've formatted the card");
+    Serial.println("Could not find FAT partition.\nMake sure you've formatted the card");
     return;
   }
 
   // print the type and size of the first FAT-type volume
   uint64_t volumesize;
-  Serial.print("\nVolume type is FAT");
-  Serial.println(fatFs.fatType(), DEC);
-  Serial.println();
+  Serial.print("\nVolume type is ");
+  uint8_t fatType = fatFs.fatType();
+#if defined(FAT_TYPE_EXFAT)
+  if (fatType == FAT_TYPE_EXFAT) {
+    Serial.println("exFAT");
+  } else
+#endif
+  {
+    if (fatType != FAT_TYPE_UNK) {
+      Serial.printf("FAT%u\n", fatFs.fatType());
+    } else {
+      Serial.println("unknown");
+    }
+  }
 
   volumesize = fatFs.blocksPerCluster();  // clusters are collections of blocks
   volumesize *= fatFs.clusterCount();     // we'll have a lot of clusters

keywords.txt

@@ -37,3 +37,8 @@ setDxDIR	KEYWORD2
 #######################################
 FILE_READ	LITERAL1
 FILE_WRITE	LITERAL1
+FAT_TYPE_EXFAT	LITERAL1
+FAT_TYPE_FAT12	LITERAL1
+FAT_TYPE_FAT16	LITERAL1
+FAT_TYPE_FAT32	LITERAL1
+FAT_TYPE_UNK	LITERAL1

src/SdFatFs.cpp

@@ -66,14 +66,24 @@ bool SdFatFs::deinit(void)
 
 uint8_t SdFatFs::fatType(void)
 {
+  uint8_t fatType = FAT_TYPE_UNK;
   switch (_SDFatFs.fs_type) {
+#if defined(FS_EXFAT)
+    case FS_EXFAT:
+      fatType = FAT_TYPE_EXFAT;
+      break;
+#endif
     case FS_FAT12:
-      return 12;
+      fatType = FAT_TYPE_FAT12;
+      break;
     case FS_FAT16:
-      return 16;
+      fatType = FAT_TYPE_FAT16;
+      break;
     case FS_FAT32:
-      return 32;
+      fatType = FAT_TYPE_FAT32;
+      break;
     default:
-      return 0;
+      fatType = FAT_TYPE_UNK;
   }
+  return fatType;
 }

src/SdFatFs.h

@@ -42,6 +42,15 @@
 /* FatFs includes component */
 #include "FatFs.h"
 
+/* Filesystem type (FATFS.fs_type) */
+#define FAT_TYPE_FAT12 12 // FS_FAT12
+#define FAT_TYPE_FAT16 16 // FS_FAT16
+#define FAT_TYPE_FAT32 32 // FS_FAT32
+#if defined(FS_EXFAT)
+  #define FAT_TYPE_EXFAT 64 // FS_EXFAT
+#endif
+#define FAT_TYPE_UNK   0  // Unknown
+
 /* To match Arduino definition*/
 #define   FILE_WRITE  FA_WRITE
 #define   FILE_READ   FA_READ

src/ffconf_default_68300.h

@@ -230,7 +230,7 @@
 /  buffer in the file system object (FATFS) is used for the file data transfer. */
 
 
-#define _FS_EXFAT 0
+#define _FS_EXFAT 1
 /* This option switches support of exFAT file system. (0:Disable or 1:Enable)
 /  When enable exFAT, also LFN needs to be enabled. (_USE_LFN >= 1)
 /  Note that enabling exFAT discards C89 compatibility. */

src/ffconf_default_80286.h

@@ -231,7 +231,7 @@
 /  buffer in the filesystem object (FATFS) is used for the file data transfer. */
 
 
-#define FF_FS_EXFAT   0
+#define FF_FS_EXFAT   1
 /* This option switches support for exFAT filesystem. (0:Disable or 1:Enable)
 /  To enable exFAT, also LFN needs to be enabled. (FF_USE_LFN >= 1)
 /  Note that enabling exFAT discards ANSI C (C89) compatibility. */