SDMMC enable max open files arg

Author: TienHuyIoT

libraries/SD_MMC/src/SD_MMC.cpp

@@ -36,7 +36,7 @@ SDMMCFS::SDMMCFS(FSImplPtr impl)
     : FS(impl), _card(NULL)
 {}
 
-bool SDMMCFS::begin(const char * mountpoint, bool mode1bit, bool format_if_mount_failed)
+bool SDMMCFS::begin(const char * mountpoint, bool mode1bit, bool format_if_mount_failed, int sdmmc_frequency, int maxOpenFiles)
 {
     if(_card) {
         return true;
@@ -59,7 +59,7 @@ bool SDMMCFS::begin(const char * mountpoint, bool mode1bit, bool format_if_mount
         .io_int_wait = &sdmmc_host_io_int_wait,
         .command_timeout_ms = 0
     };
-    host.max_freq_khz = SDMMC_FREQ_HIGHSPEED;
+    host.max_freq_khz = sdmmc_frequency;
 #ifdef BOARD_HAS_1BIT_SDMMC
     mode1bit = true;
 #endif
@@ -70,7 +70,7 @@ bool SDMMCFS::begin(const char * mountpoint, bool mode1bit, bool format_if_mount
 
     esp_vfs_fat_sdmmc_mount_config_t mount_config = {
         .format_if_mount_failed = format_if_mount_failed,
-        .max_files = 5,
+        .max_files = maxOpenFiles,
         .allocation_unit_size = 0
     };
 

libraries/SD_MMC/src/SD_MMC.h

@@ -18,6 +18,17 @@
 #include "driver/sdmmc_types.h"
 #include "sd_defines.h"
 
+// If reading/writing to the SD card is unstable, 
+// you can define BOARD_MAX_SDMMC_FREQ with lower value (Ex. SDMMC_FREQ_DEFAULT) 
+// in pins_arduino.h for your board variant.
+#ifndef BOARD_MAX_SDMMC_FREQ
+#define BOARD_MAX_SDMMC_FREQ SDMMC_FREQ_HIGHSPEED
+#endif
+
+#ifndef SDMMC_HOST_MAX_FILES_DEFAULT
+#define SDMMC_HOST_MAX_FILES_DEFAULT 10
+#endif
+
 namespace fs
 {
 
@@ -28,7 +39,7 @@ class SDMMCFS : public FS
 
 public:
     SDMMCFS(FSImplPtr impl);
-    bool begin(const char * mountpoint="/sdcard", bool mode1bit=false, bool format_if_mount_failed=false);
+    bool begin(const char *mountpoint = "/sdcard", bool mode1bit = false, bool format_if_mount_failed = false, int sdmmc_frequency = BOARD_MAX_SDMMC_FREQ, int maxOpenFiles = SDMMC_HOST_MAX_FILES_DEFAULT);
     void end();
     sdcard_type_t cardType();
     uint64_t cardSize();