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