113 lines
2.2 KiB
C
113 lines
2.2 KiB
C
#include <inttypes.h>
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#include <string.h>
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#include "ff.h"
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#include "config.h"
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#include "fileutils.h"
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#define DEFAULT_DIR "/"
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#define INVALID_FILE_ATTR (AM_VOL)
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FATFS g_fs;
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DIR g_dir;
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FIL g_fil;
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uint8_t g_fat_buffer[FAT_BUF_SIZE];
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/*---------------------------------------------------------*/
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/* User Provided RTC Function called by FatFs module */
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DWORD get_fattime (void) {
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/* Returns current time packed into a DWORD variable */
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return ((DWORD)(2014 - 1980) << 25) /* Year 2014 */
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| ((DWORD)6 << 21) /* Month 6 */
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| ((DWORD)1 << 16) /* Mday 1 */
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| ((DWORD)0 << 11) /* Hour 0 */
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| ((DWORD)0 << 5) /* Min 0 */
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| ((DWORD)0 >> 1); /* Sec 0 */
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}
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int is_valid_file(FILINFO* pfile_info) {
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char* file_name;
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int len;
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file_name = pfile_info->lfname[0] ? pfile_info->lfname : pfile_info->fname;
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len = strlen(file_name);
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if ((pfile_info->fattrib & INVALID_FILE_ATTR)) {
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return 0;
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}
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if ((pfile_info->fattrib & AM_DIR)) {
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return (file_name[0] != '.');
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}
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if (len < 5) {
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return 0;
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}
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return 1;
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}
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int get_num_files(FILINFO* pfile_info) {
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int num_files = 0;
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if (!pfile_info) {
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return 0;
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}
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// rewind directory to first file
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if (f_readdir(&g_dir, 0) != FR_OK) {
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return 0;
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}
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while(1) {
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pfile_info->fname[0] = 0;
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if ((f_readdir(&g_dir, pfile_info) != FR_OK) || !pfile_info->fname[0]) {
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break;
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}
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if (!is_valid_file(pfile_info)) {
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continue;
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}
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num_files++;
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}
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return num_files;
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}
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int get_file_at_index(FILINFO* pfile_info, int index) {
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int cur_file_index = 0;
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if (!pfile_info) {
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return 0;
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}
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// rewind directory to first file
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if (f_readdir(&g_dir, 0) != FR_OK) {
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return 0;
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}
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while(1) {
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pfile_info->fname[0] = 0;
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if ((f_readdir(&g_dir, pfile_info) != FR_OK) || !pfile_info->fname[0]) {
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break;
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}
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if (!is_valid_file(pfile_info)) {
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continue;
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}
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if (cur_file_index == index) {
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return 1;
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}
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cur_file_index++;
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}
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return 0;
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}
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FRESULT change_dir(char* dir) {
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FRESULT fr = FR_OK;
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if ((fr = f_chdir(dir)) == FR_OK) {
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return f_opendir( &g_dir, "." );
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}
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return fr;
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}
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