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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2014 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/nlr.h"
#include "py/runtime.h"
#include "lib/fatfs/ff.h"
#include "fsusermount.h"
// for user-mountable block device
fs_user_mount_t *fs_user_mount;
STATIC mp_obj_t pyb_mount(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_readonly, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
{ MP_QSTR_mkfs, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
};
// parse args
mp_obj_t device = pos_args[0];
mp_obj_t mount_point = pos_args[1];
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args - 2, pos_args + 2, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
// get the mount point
mp_uint_t mnt_len;
const char *mnt_str = mp_obj_str_get_data(mount_point, &mnt_len);
if (device == mp_const_none) {
// umount
FRESULT res = FR_NO_FILESYSTEM;
if (fs_user_mount != NULL) {
res = f_mount(NULL, fs_user_mount->str, 0);
m_del_obj(fs_user_mount_t, fs_user_mount);
fs_user_mount = NULL;
}
if (res != FR_OK) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "can't umount"));
}
} else {
// mount
if (fs_user_mount != NULL) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "device already mounted"));
}
// create new object
fs_user_mount = m_new_obj(fs_user_mount_t);
fs_user_mount->str = mnt_str;
fs_user_mount->len = mnt_len;
// load block protocol methods
mp_load_method(device, MP_QSTR_readblocks, fs_user_mount->readblocks);
mp_load_method_maybe(device, MP_QSTR_writeblocks, fs_user_mount->writeblocks);
mp_load_method_maybe(device, MP_QSTR_sync, fs_user_mount->sync);
mp_load_method(device, MP_QSTR_count, fs_user_mount->count);
// Read-only device indicated by writeblocks[0] == MP_OBJ_NULL.
// User can specify read-only device by:
// 1. readonly=True keyword argument
// 2. nonexistent writeblocks method (then writeblocks[0] == MP_OBJ_NULL already)
if (args[0].u_bool) {
fs_user_mount->writeblocks[0] = MP_OBJ_NULL;
}
// mount the block device
FRESULT res = f_mount(&fs_user_mount->fatfs, fs_user_mount->str, 1);
// check the result
if (res == FR_OK) {
} else if (res == FR_NO_FILESYSTEM && args[1].u_bool) {
res = f_mkfs(fs_user_mount->str, 1, 0);
if (res != FR_OK) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "can't mkfs"));
}
} else {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "can't mount"));
}
/*
if (fs_user_mount->writeblocks[0] == MP_OBJ_NULL) {
printf("mounted read-only");
} else {
printf("mounted read-write");
}
DWORD nclst;
FATFS *fatfs;
f_getfree(fs_user_mount.str, &nclst, &fatfs);
printf(" on %s with %u bytes free\n", fs_user_mount.str, (uint)(nclst * fatfs->csize * 512));
*/
}
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(pyb_mount_obj, 2, pyb_mount);
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