-static struct fat_file_struct *open_log_file(void)
-{
- struct fat_file_struct *fd;
- struct fat_fs_struct *fs;
- struct partition_struct *partition ;
- struct fat_dir_struct *dd;
- struct fat_dir_entry_struct directory;
- struct fat_dir_entry_struct file_entry;
- int16_t i = 0;
- char name[16];
-
- /* setup sd card slot */
- if (!sd_raw_init()) {
-#if SD_DEBUG
- printf_P(PSTR("MMC/SD initialization failed\n"));
-#endif
- return NULL;
- }
-
- /* open first partition */
- partition = partition_open(sd_raw_read,
- sd_raw_read_interval,
-#if SD_RAW_WRITE_SUPPORT
- sd_raw_write, sd_raw_write_interval,
-#else
- 0, 0,
-#endif
- 0);
-
- if (!partition) {
- /* If the partition did not open, assume the storage device
- * is a "superfloppy", i.e. has no MBR.
- */
- partition = partition_open(sd_raw_read,
- sd_raw_read_interval,
-#if SD_RAW_WRITE_SUPPORT
- sd_raw_write,
- sd_raw_write_interval,
-#else
- 0,
- 0,
-#endif
- -1);
- if (!partition) {
-#if SD_DEBUG
- printf_P(PSTR("opening partition failed\n"));
-#endif
- return NULL;
- }
- }
-
- /* open file system */
- fs = fat_open(partition);
- if (!fs) {
-#if SD_DEBUG
- printf_P(PSTR("opening filesystem failed\n"));
-#endif
- return NULL;
- }
-
- /* open root directory */
- fat_get_dir_entry_of_path(fs, "/", &directory);
- dd = fat_open_dir(fs, &directory);
- if (!dd) {
-#if SD_DEBUG
- printf_P(PSTR("opening root directory failed\n"));
-#endif
- return NULL;
- }
-
- /* print some card information as a boot message */
- //print_disk_info(fs);
-
- printf("choose log file name\n");
- while (1) {
- snprintf(name, sizeof(name), "log%.4d", i++);
- if (!find_file_in_dir(fs, dd, name, &file_entry))
- break;
- }
-
- printf("create log file %s\n", name);
- if (!fat_create_file(dd, name, &file_entry)) {
- printf_P(PSTR("error creating file: "));
- }
-
- fd = open_file_in_dir(fs, dd, name);
- if (!fd) {
- printf_P(PSTR("error opening "));
- return NULL;
- }
-
- return fd;
-}
-