diff -r b74b0e4902c3 -r ad2c8b13eb88 main/task_sdcard.c
--- a/main/task_sdcard.c	Sat Oct 20 13:23:15 2018 +0200
+++ b/main/task_sdcard.c	Sat Oct 20 17:09:48 2018 +0200
@@ -20,8 +20,8 @@
 
 
 
-SDCARD_State		* sdcard_state;
-JSON_log		* json_log;
+SDCARD_State		*sdcard_state;			///< SD card status
+JSON_log		*json_log;			///< JSON log array
 EventGroupHandle_t	xEventGroupSDcard;		///< SD card events.
 
 static const char	*TAG = "task_sdcard";
@@ -33,10 +33,10 @@
 
 
 #define SDCARD_HOST_SLOT	VSPI_HOST		///< HSPI_HOST is used by the TFT
-#define SDCARD_PIN_NUM_MISO	2
-#define SDCARD_PIN_NUM_MOSI	15
-#define SDCARD_PIN_NUM_CLK	14
-#define SDCARD_PIN_NUM_CS	13
+#define SDCARD_PIN_NUM_MISO	2			///< MISO pin
+#define SDCARD_PIN_NUM_MOSI	15			///< MOSI pin
+#define SDCARD_PIN_NUM_CLK	14			///< CLOCK
+#define SDCARD_PIN_NUM_CS	13			///< Chip select pin
 #define	SDCARD_DMA_CHANNEL	2			///< Channel 1 is used by the TFT
 
 
@@ -191,10 +191,14 @@
 
 
 
-/*
- * This is a local modified version of the esp_vfs_fat_sdmmc_mount() function in
- * the FreeRTOS components library. It is here so we can better handle errors
- * for our application.
+/**
+ * @brief This is a local modified version of the esp_vfs_fat_sdmmc_mount() function in
+ *        the FreeRTOS components library. It is here so we can better handle errors
+ *        for our application.
+ * @param base_path The mount path
+ * @param host_config SPI host configuration
+ * @param slot_config Slot configuration
+ * @return Error condition.
  */
 esp_err_t my_vfs_fat_sdmmc_init(const char* base_path, const sdmmc_host_t* host_config, const void* slot_config)
 {
@@ -248,6 +252,15 @@
 
 
 
+/**
+ * @brief Mount SD card.
+ * @param base_path The mountpoint
+ * @param host_config SPI host configuration
+ * @param slot_config Slot configuration
+ * @param mount_config Mount configuration
+ * @param[out] out_card Card information
+ * @return Error condition
+ */
 esp_err_t my_esp_vfs_fat_sdmmc_mount(const char* base_path,
 	const sdmmc_host_t* host_config,
 	const void* slot_config,
@@ -307,7 +320,11 @@
 
 
 
-esp_err_t my_esp_vfs_fat_sdmmc_unmount()
+/**
+ * @brief Unmount a mounted SD card,
+ * @return Error condition
+ */
+esp_err_t my_esp_vfs_fat_sdmmc_unmount(void)
 {
     if (s_card == NULL) {
 	return ESP_ERR_INVALID_STATE;
@@ -351,6 +368,11 @@
 
 
 
+/**
+ * @brief Sync directories.
+ * @param fromdir Source directory
+ * @param todir Destination directory
+ */
 void SyncDirs(char *fromdir, char *todir)
 {
     char	ff[64], tf[64];