DRESULT disk_read (
BYTE pdrv, /* Physical drive nmuber (0..) */
BYTE *buff, /* Data buffer to store read data */
DWORD sector, /* Sector address (LBA) */
UINT count /* Number of sectors to read (1..128) */
)
{
switch (pdrv) {
case PD_FLASH:
for (int i = 0; i < count; i++) {
if (!storage_read_block(buff + i * FLASH_BLOCK_SIZE, sector + i)) {
return RES_ERROR;
}
}
return RES_OK;
#if MICROPY_HW_HAS_SDCARD
case PD_SDCARD:
if (!sdcard_read_blocks(buff, sector, count)) {
return RES_ERROR;
}
return RES_OK;
#endif
}
return RES_PARERR;
}
mp_uint_t storage_read_blocks(uint8_t *dest, uint32_t block_num, uint32_t num_blocks) {
for (size_t i = 0; i < num_blocks; i++) {
if (!storage_read_block(dest + i * FLASH_BLOCK_SIZE, block_num + i)) {
return 1; // error
}
}
return 0; // success
}
DRESULT disk_read (
BYTE pdrv, /* Physical drive nmuber (0..) */
BYTE *buff, /* Data buffer to store read data */
DWORD sector, /* Sector address (LBA) */
UINT count /* Number of sectors to read (1..128) */
)
{
switch (pdrv) {
case PD_FLASH:
for (int i = 0; i < count; i++) {
if (!storage_read_block(buff + i * FLASH_BLOCK_SIZE, sector + i)) {
return RES_ERROR;
}
}
return RES_OK;
#if MICROPY_HW_HAS_SDCARD
case PD_SDCARD:
if (sdcard_read_blocks(buff, sector, count) != 0) {
return RES_ERROR;
}
return RES_OK;
#endif
case PD_USER:
if (MP_STATE_PORT(fs_user_mount) == NULL) {
// nothing mounted
return RES_ERROR;
}
MP_STATE_PORT(fs_user_mount)->readblocks[2] = MP_OBJ_NEW_SMALL_INT(sector);
MP_STATE_PORT(fs_user_mount)->readblocks[3] = mp_obj_new_bytearray_by_ref(count * 512, buff);
mp_call_method_n_kw(2, 0, MP_STATE_PORT(fs_user_mount)->readblocks);
return RES_OK;
}
return RES_PARERR;
}
