esp-idf/components/fatfs/diskio/diskio.c

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2.7 KiB
C
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/*-----------------------------------------------------------------------*/
/* Low level disk I/O module skeleton for FatFs (C)ChaN, 2016 */
/* ESP-IDF port Copyright 2016 Espressif Systems (Shanghai) PTE LTD */
/*-----------------------------------------------------------------------*/
/* If a working storage control module is available, it should be */
/* attached to the FatFs via a glue function rather than modifying it. */
/* This is an example of glue functions to attach various exsisting */
/* storage control modules to the FatFs module with a defined API. */
/*-----------------------------------------------------------------------*/
#include <string.h>
#include <time.h>
#include <stdlib.h>
#include <sys/time.h>
#include "diskio_impl.h"
#include "ffconf.h"
#include "ff.h"
static ff_diskio_impl_t * s_impls[FF_VOLUMES] = { NULL };
#if FF_MULTI_PARTITION /* Multiple partition configuration */
PARTITION VolToPart[] = {
{0, 0}, /* Logical drive 0 ==> Physical drive 0, auto detection */
{1, 0} /* Logical drive 1 ==> Physical drive 1, auto detection */
};
#endif
esp_err_t ff_diskio_get_drive(BYTE* out_pdrv)
{
BYTE i;
for(i=0; i<FF_VOLUMES; i++) {
if (!s_impls[i]) {
*out_pdrv = i;
return ESP_OK;
}
}
return ESP_ERR_NOT_FOUND;
}
void ff_diskio_register(BYTE pdrv, const ff_diskio_impl_t* discio_impl)
{
assert(pdrv < FF_VOLUMES);
if (s_impls[pdrv]) {
ff_diskio_impl_t* im = s_impls[pdrv];
s_impls[pdrv] = NULL;
free(im);
}
if (!discio_impl) {
return;
}
ff_diskio_impl_t * impl = (ff_diskio_impl_t *)malloc(sizeof(ff_diskio_impl_t));
assert(impl != NULL);
memcpy(impl, discio_impl, sizeof(ff_diskio_impl_t));
s_impls[pdrv] = impl;
}
DSTATUS ff_disk_initialize (BYTE pdrv)
{
return s_impls[pdrv]->init(pdrv);
}
DSTATUS ff_disk_status (BYTE pdrv)
{
return s_impls[pdrv]->status(pdrv);
}
DRESULT ff_disk_read (BYTE pdrv, BYTE* buff, DWORD sector, UINT count)
{
return s_impls[pdrv]->read(pdrv, buff, sector, count);
}
DRESULT ff_disk_write (BYTE pdrv, const BYTE* buff, DWORD sector, UINT count)
{
return s_impls[pdrv]->write(pdrv, buff, sector, count);
}
DRESULT ff_disk_ioctl (BYTE pdrv, BYTE cmd, void* buff)
{
return s_impls[pdrv]->ioctl(pdrv, cmd, buff);
}
DWORD get_fattime(void)
{
time_t t = time(NULL);
struct tm tmr;
localtime_r(&t, &tmr);
int year = tmr.tm_year < 80 ? 0 : tmr.tm_year - 80;
return ((DWORD)(year) << 25)
| ((DWORD)(tmr.tm_mon + 1) << 21)
| ((DWORD)tmr.tm_mday << 16)
| (WORD)(tmr.tm_hour << 11)
| (WORD)(tmr.tm_min << 5)
| (WORD)(tmr.tm_sec >> 1);
}