application: implement fatfs example
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application.c
220
application.c
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@ -44,6 +44,10 @@
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#include "radio_gps.h" // GPS communication
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#include "flash_sdcard.h" // to read/write logs on SD card
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/* FatFs library */
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#include "diskio.h" // disk access we have to implement to use FatFs
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#include "ff.h" // FatFs library
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#define WATCHDOG_PERIOD 10000 /**< watchdog period in ms */
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/** @defgroup main_flags flag set in interrupts to be processed in main task
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@ -168,6 +172,150 @@ error:
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return;
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}
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#if !FF_FS_NORTC && !FF_FS_READONLY
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/** get the current time
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* @return current local time shall be returned as bit-fields packed into a DWORD value
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* @note FatFs function to be implement by user
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*/
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DWORD get_fattime (void)
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{
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time_rtc= rtc_get_counter_val(); // get time from internal RTC
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time_tm = localtime(&time_rtc); // convert time
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return ((1900+time_tm->tm_year-1800)<<25)+((time_tm->tm_mon)<<21)+((time_tm->tm_mday)<<16)+((time_tm->tm_hour)<<11)+((time_tm->tm_min)<<5)+((time_tm->tm_sec/2)<<0); // convert time to DWORD
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}
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#endif
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/** SD card status, used by FatFs */
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static DSTATUS flash_sdcard_status = STA_NOINIT;
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/** inquire the current drive status
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* @param[in] pdrv physical drive number
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* @return current drive status flags
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* @note FatFs function to be implement by user
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*/
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DSTATUS disk_status (BYTE pdrv)
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{
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if (0!=pdrv) { // drive 0 (sd card) is our only drive
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return STA_NOINIT;
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}
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return flash_sdcard_status;
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}
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/** initializes the storage device
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* @param[in] pdrv physical drive number
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* @return current drive status flags
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* @note FatFs function to be implement by user
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*/
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DSTATUS disk_initialize (BYTE pdrv)
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{
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if (0!=pdrv) { // drive 0 (sd card) is our only drive
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return STA_NOINIT;
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}
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if (flash_sdcard_setup()) {
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flash_sdcard_status &= ~(STA_NOINIT|STA_NODISK); // SD card initialized
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} else {
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flash_sdcard_status |= (STA_NOINIT|STA_NODISK); // SD card is not present or failed initialisation
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}
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return flash_sdcard_status;
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}
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/** control device specific features and miscellaneous functions other than generic read/write
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* @param[in] pdrv physical drive number
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* @param[in] cmd control command code
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* @param[io] buff pointer to the control data
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* @return RES_*
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* @note FatFs function to be implement by user
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*/
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DRESULT disk_ioctl (BYTE drv, BYTE cmd, void *buff)
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{
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if (0!=drv) { // drive 0 (sd card) is our only drive
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return RES_PARERR;
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}
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if (flash_sdcard_status&STA_NOINIT) { // SD card not initialized
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return RES_NOTRDY;
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}
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DRESULT to_return = RES_ERROR;
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switch (cmd) {
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case CTRL_SYNC: // nothing to flush (writes are complete)
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to_return = RES_OK;
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break;
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case GET_SECTOR_COUNT:
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*(DWORD*)buff = flash_sdcard_size()/512;
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to_return = RES_OK;
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break;
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case GET_SECTOR_SIZE:
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*(DWORD*)buff = 512;
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to_return = RES_OK;
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break;
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case GET_BLOCK_SIZE:
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*(DWORD*)buff = flash_sdcard_erase_size()/512;
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to_return = RES_OK;
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break;
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default:
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to_return = RES_ERROR;
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}
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return to_return;;
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}
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/** read data from the sector(s) of storage device
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* @param[in] pdrv physical drive number
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* @param[out] buff pointer to the read data buffer
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* @param[in] sector start sector number
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* @param[in] count number of sectors to read
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* @return RES_*
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* @note FatFs function to be implement by user
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*/
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DRESULT disk_read (BYTE pdrv, BYTE* buff, DWORD sector, UINT count)
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{
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if (0!=pdrv) { // drive 0 (sd card) is our only drive
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return RES_PARERR;
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}
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if (flash_sdcard_status&STA_NOINIT) { // SD card not initialized
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return RES_NOTRDY;
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}
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if (NULL==buff || 0==count) { // can't read no data
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return RES_PARERR;
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}
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for (UINT i=0; i<count; i++) {
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if (!flash_sdcard_read_data(sector+i, &((uint8_t*)buff)[i*512])) {
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return RES_ERROR;
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}
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}
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return RES_OK;
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}
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/** write data to the sector(s) of storage device.
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* @param[in] pdrv physical drive number
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* @param[out] buff pointer to the data to be written
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* @param[in] sector sector number to write from
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* @param[in] count number of sectors to write
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* @return RES_*
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* @note FatFs function to be implement by user
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*/
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DRESULT disk_write (BYTE drv, const BYTE* buff, DWORD sector, UINT count)
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{
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if (0!=drv) { // drive 0 (sd card) is our only drive
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return RES_PARERR;
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}
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if (flash_sdcard_status&STA_NOINIT) { // SD card not initialized
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return RES_NOTRDY;
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}
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if (NULL==buff || 0==count) { // can't write no data
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return RES_PARERR;
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}
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for (UINT i=0; i<count; i++) {
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if (!flash_sdcard_write_data(sector+i, &((uint8_t*)buff)[i*512])) {
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return RES_ERROR;
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}
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}
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return RES_OK;
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}
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/** program entry point
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* this is the firmware function started by the micro-controller
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*/
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@ -219,6 +367,7 @@ void main(void)
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radio_gps_setup();
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printf("OK\n");
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/*
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// setup SD card
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printf("setup SD card: ");
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if (flash_sdcard_setup()) {
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@ -228,6 +377,77 @@ void main(void)
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}
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printf("card size: %U bytes\n", flash_sdcard_size());
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printf("erase size: %u bytes\n", flash_sdcard_erase_size());
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uint8_t data_in[512] = {0xaa};
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for (uint16_t i=0; i<sizeof(data_in); i++) {
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data_in[i]=0xaa;
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}
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uint8_t data_out[512] = {0x00};
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if (!flash_sdcard_write_data(10000, data_in)) {
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printf("could not write data\n");
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} else if (!flash_sdcard_read_data(10000, data_out)) {
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printf("could not read data\n");
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} else {
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bool prog_ok = true;
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for (uint16_t i=0; i<sizeof(data_in) && i<sizeof(data_out); i++) {
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prog_ok = (prog_ok&&(data_in[i]==data_out[i]));
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}
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if (prog_ok) {
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printf("programming succeeded\n");
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} else {
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printf("programming failed\n");
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}
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}
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*/
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printf("setup SD card file system: ");
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FATFS card_fs;
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FRESULT result = f_mount(&card_fs, "", 0);
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if (FR_OK!=result) {
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printf("failed (result=%u)\n", result);
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} else {
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printf("OK\n");
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DIR directory;
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result = f_opendir(&directory, "");
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if (FR_OK!=result) {
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printf("failed to open directory (result=%u)\n", result);
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} else {
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printf("directory opened\n");
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FILINFO info;
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result = f_findfirst(&directory, &info, "", "*");
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if (FR_OK!=result) {
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printf("failed to find item (result=%u)\n", result);
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} else {
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printf("item found: %s\n", info.fname);
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FIL file;
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result = f_open(&file, info.fname, FA_READ);
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if (FR_OK!=result) {
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printf("failed to open file (result=%u)\n", result);
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} else {
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printf("file opened\n");
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printf("file content:\n");
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char line[100];
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while (f_gets(line, sizeof(line), &file)) {
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printf(line);
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}
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f_close(&file);
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FIL file2;
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result = f_open(&file2, info.fname, FA_OPEN_APPEND | FA_WRITE);
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if (FR_OK!=result) {
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printf("failed to open file for appending (result=%u)\n", result);
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} else {
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int chars = f_puts("hello me\n", &file2);
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if (-1==chars) {
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printf("failed to append file\n");
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} else {
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printf("file appended by %d characters\n", chars);
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}
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f_close(&file2);
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}
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}
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}
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}
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}
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// print time
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time_rtc= rtc_get_counter_val(); // get time from internal RTC
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