applications: nrf5340_audio: Nitpick fixes in SD card module

Found when looking through this module.
No changes to functionality.

Signed-off-by: Erik Robstad <erik.robstad@nordicsemi.no>

applications/nrf5340_audio/src/modules/sd_card.c

@@ -19,13 +19,15 @@
 LOG_MODULE_REGISTER(sd_card, CONFIG_MODULE_SD_CARD_LOG_LEVEL);
 
 #define SD_ROOT_PATH "/SD:/"
-#define PATH_MAX_LEN 260 /* Maximum length for path support by Windows file system*/
+/* Maximum length for path support by Windows file system */
+#define PATH_MAX_LEN 260
 #define K_SEM_OPER_TIMEOUT_MS 500
 
+K_SEM_DEFINE(m_sem_sd_oper_ongoing, 1, 1);
+
 static const char *sd_root_path = "/SD:";
 static FATFS fat_fs;
 static bool sd_init_success;
-K_SEM_DEFINE(m_sem_sd_oper_ongoing, 1, 1);
 
 static struct fs_mount_t mnt_pt = {
  .type = FS_FATFS,
@@ -51,6 +53,7 @@ int sd_card_list_files(char const *const path, char *buf, size_t *buf_size)
  k_sem_give(&m_sem_sd_oper_ongoing);
  return -ENODEV;
  }
+
  fs_dir_t_init(&dirp);
 
  if (path == NULL) {
@@ -87,6 +90,7 @@ int sd_card_list_files(char const *const path, char *buf, size_t *buf_size)
  if (entry.name[0] == 0) {
  break;
  }
+
  if (buf != NULL) {
  size_t remaining_buf_size = *buf_size - used_buf_size;
  ssize_t len = snprintk(
@@ -101,6 +105,7 @@ int sd_card_list_files(char const *const path, char *buf, size_t *buf_size)
 
  used_buf_size += len;
  }
+
  LOG_INF("[%s] %s", entry.type == FS_DIR_ENTRY_DIR ? "DIR " : "FILE", entry.name);
  }
 

applications/nrf5340_audio/src/modules/sd_card.h

@@ -10,7 +10,8 @@
 #include <stddef.h>
 #include <zephyr/fs/fs.h>
 
-/**@brief Print out the contents under SD card root path and write the content to buffer.
+/**
+ * @brief Print out the contents under SD card root path and write the content to buffer.
  *
  * @param[in] path Path of the folder which is going to be listed.
  * If assigned path is null, then listing the contents under
@@ -29,7 +30,8 @@
  */
 int sd_card_list_files(char const *const path, char *buf, size_t *buf_size);
 
-/**@brief Write data from buffer into the file.
+/**
+ * @brief Write data from buffer into the file.
  *
  * @note If the file already exists, data will be appended to the end of the file.
  *
@@ -47,7 +49,8 @@ int sd_card_list_files(char const *const path, char *buf, size_t *buf_size);
  */
 int sd_card_open_write_close(char const *const filename, char const *const data, size_t *size);
 
-/**@brief Read data from file into the buffer.
+/**
+ * @brief Read data from file into the buffer.
  *
  * @param[in] filename Name of the target file for reading, the default location is
  * the root directoy of SD card, accept absolute path under
@@ -65,7 +68,8 @@ int sd_card_open_write_close(char const *const filename, char const *const data,
  */
 int sd_card_open_read_close(char const *const filename, char *const buf, size_t *size);
 
-/**@brief Open file on SD card.
+/**
+ * @brief Open file on SD card.
  *
  * @param[in] filename Name of file to open. Default
  * location is the root directoy of SD card.
@@ -81,7 +85,8 @@ int sd_card_open_read_close(char const *const filename, char *const buf, size_t
  */
 int sd_card_open(char const *const filename, struct fs_file_t *f_seg_read_entry);
 
-/**@brief Read segment on the open file on the SD card.
+/**
+ * @brief Read segment on the open file on the SD card.
  *
  * @param[out] buf Pointer to the buffer to write the read data into.
  * @param[in, out] size Number of bytes to be read from file.
@@ -100,7 +105,8 @@ int sd_card_open(char const *const filename, struct fs_file_t *f_seg_read_entry)
  */
 int sd_card_read(char *buf, size_t *size, struct fs_file_t *f_seg_read_entry);
 
-/**@brief Close the file opened by the sd_card_segment_read_open function.
+/**
+ * @brief Close the file opened by the sd_card_segment_read_open function.
  *
  * @param[in, out] f_seg_read_entry Pointer to a file object. After call to this
  * function, the pointer is reset and can be used for
@@ -114,7 +120,8 @@ int sd_card_read(char *buf, size_t *size, struct fs_file_t *f_seg_read_entry);
  */
 int sd_card_close(struct fs_file_t *f_seg_read_entry);
 
-/**@brief Initialize the SD card interface and print out SD card details.
+/**
+ * @brief Initialize the SD card interface and print out SD card details.
  *
  * @retval 0 on success.
  * @retval -ENODEV SD init failed. SD card likely not inserted.