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;
}
static mp_obj_t sd_read(mp_obj_t self, mp_obj_t block_num) {
uint8_t *dest = m_new(uint8_t, SDCARD_BLOCK_SIZE);
if (!sdcard_read_blocks(dest, mp_obj_get_int(block_num), 1)) {
m_free(dest, SDCARD_BLOCK_SIZE);
return mp_const_none;
}
return mp_obj_new_bytearray_by_ref(SDCARD_BLOCK_SIZE, dest);
}
STATIC mp_obj_t sd_read(mp_obj_t self, mp_obj_t block_num) {
uint8_t *dest = m_new(uint8_t, SDCARD_BLOCK_SIZE);
mp_uint_t ret = sdcard_read_blocks(dest, mp_obj_get_int(block_num), 1);
if (ret != 0) {
m_del(uint8_t, dest, SDCARD_BLOCK_SIZE);
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_Exception, "sdcard_read_blocks failed [%u]", ret));
}
return mp_obj_new_bytearray_by_ref(SDCARD_BLOCK_SIZE, dest);
}
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;
}
STATIC mp_obj_t pyb_sdcard_readblocks(mp_obj_t self, mp_obj_t block_num, mp_obj_t buf) {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(buf, &bufinfo, MP_BUFFER_WRITE);
mp_uint_t ret = sdcard_read_blocks(bufinfo.buf, mp_obj_get_int(block_num), bufinfo.len / SDCARD_BLOCK_SIZE);
return mp_obj_new_bool(ret == 0);
}
/**
* @brief Read data from the medium
* @param lun : logical unit number
* @param buf : Pointer to the buffer to save data
* @param blk_addr : address of 1st block to be read
* @param blk_len : nmber of blocks to be read
* @retval Status
*/
int8_t SDCARD_STORAGE_Read(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len) {
if (!sdcard_read_blocks(buf, blk_addr, blk_len)) {
return -1;
}
return 0;
}