add circuitpython code

2 files changed, 328 insertions, 0 deletions

diff --git a/circuitpython/shared-bindings/storage/__init__.c b/circuitpython/shared-bindings/storage/__init__.c
new file mode 100644
index 0000000..277c834
--- /dev/null
+++ b/circuitpython/shared-bindings/storage/__init__.c
@@ -0,0 +1,283 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * SPDX-FileCopyrightText: Copyright (c) 2013, 2014 Damien P. George
+ * Copyright (c) 2015 Josef Gajdusek
+ * Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
+ *
+ * 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 <string.h>
+
+#include "extmod/vfs_fat.h"
+#include "py/obj.h"
+#include "py/objnamedtuple.h"
+#include "py/runtime.h"
+#include "shared-bindings/storage/__init__.h"
+#include "supervisor/shared/translate.h"
+
+//| """Storage management
+//|
+//| The `storage` provides storage management functionality such as mounting and
+//| unmounting which is typically handled by the operating system hosting Python.
+//| CircuitPython does not have an OS, so this module provides this functionality
+//| directly.
+
+//| For more information regarding using the `storage` module, refer to the `CircuitPython
+//| Essentials Learn guide
+//| <https://learn.adafruit.com/circuitpython-essentials/circuitpython-storage>`_.
+//| """
+//|
+
+//| def mount(filesystem: VfsFat, mount_path: str, *, readonly: bool = False) -> None:
+//|     """Mounts the given filesystem object at the given path.
+//|
+//|     This is the CircuitPython analog to the UNIX ``mount`` command.
+//|
+//|     :param VfsFat filesystem: The filesystem to mount.
+//|     :param str mount_path: Where to mount the filesystem.
+//|     :param bool readonly: True when the filesystem should be readonly to CircuitPython.
+//|     """
+//|     ...
+//|
+STATIC mp_obj_t storage_mount(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    enum { ARG_filesystem, ARG_mount_path, ARG_readonly };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_filesystem, MP_ARG_OBJ | MP_ARG_REQUIRED },
+        { MP_QSTR_mount_path, MP_ARG_OBJ | MP_ARG_REQUIRED },
+        { MP_QSTR_readonly, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
+    };
+
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    // get the mount point
+    const char *mnt_str = mp_obj_str_get_str(args[ARG_mount_path].u_obj);
+
+    // Make sure we're given an object we can mount.
+    // TODO(tannewt): Make sure we have all the methods we need to operating it
+    // as a file system.
+    mp_obj_t vfs_obj = args[ARG_filesystem].u_obj;
+    mp_obj_t dest[2];
+    mp_load_method_maybe(vfs_obj, MP_QSTR_mount, dest);
+    if (dest[0] == MP_OBJ_NULL) {
+        mp_raise_ValueError(translate("filesystem must provide mount method"));
+    }
+
+    common_hal_storage_mount(vfs_obj, mnt_str, args[ARG_readonly].u_bool);
+
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_KW(storage_mount_obj, 0, storage_mount);
+
+//| def umount(mount: Union[str, VfsFat]) -> None:
+//|     """Unmounts the given filesystem object or if *mount* is a path, then unmount
+//|     the filesystem mounted at that location.
+//|
+//|     This is the CircuitPython analog to the UNIX ``umount`` command."""
+//|     ...
+//|
+STATIC mp_obj_t storage_umount(mp_obj_t mnt_in) {
+    if (mp_obj_is_str(mnt_in)) {
+        common_hal_storage_umount_path(mp_obj_str_get_str(mnt_in));
+    } else {
+        common_hal_storage_umount_object(mnt_in);
+    }
+
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(storage_umount_obj, storage_umount);
+
+//| def remount(mount_path: str, readonly: bool = False, *, disable_concurrent_write_protection: bool = False) -> None:
+//|     """Remounts the given path with new parameters.
+//|
+//|       :param str mount_path: The path to remount.
+//|       :param bool readonly: True when the filesystem should be readonly to CircuitPython.
+//|       :param bool disable_concurrent_write_protection: When True, the check that makes sure the
+//|         underlying filesystem data is written by one computer is disabled. Disabling the protection
+//|         allows CircuitPython and a host to write to the same filesystem with the risk that the
+//|         filesystem will be corrupted."""
+//|     ...
+//|
+STATIC mp_obj_t storage_remount(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    enum { ARG_mount_path, ARG_readonly, ARG_disable_concurrent_write_protection };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_mount_path, MP_ARG_OBJ | MP_ARG_REQUIRED },
+        { MP_QSTR_readonly, MP_ARG_BOOL, {.u_bool = false} },
+        { MP_QSTR_disable_concurrent_write_protection, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
+    };
+
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    const char *mnt_str = mp_obj_str_get_str(args[ARG_mount_path].u_obj);
+
+    common_hal_storage_remount(mnt_str, args[ARG_readonly].u_bool, args[ARG_disable_concurrent_write_protection].u_bool);
+
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_KW(storage_remount_obj, 0, storage_remount);
+
+//| def getmount(mount_path: str) -> VfsFat:
+//|     """Retrieves the mount object associated with the mount path"""
+//|     ...
+//|
+STATIC mp_obj_t storage_getmount(const mp_obj_t mnt_in) {
+    return common_hal_storage_getmount(mp_obj_str_get_str(mnt_in));
+}
+MP_DEFINE_CONST_FUN_OBJ_1(storage_getmount_obj, storage_getmount);
+
+//| def erase_filesystem() -> None:
+//|     """Erase and re-create the ``CIRCUITPY`` filesystem.
+//|
+//|     On boards that present USB-visible ``CIRCUITPY`` drive (e.g., SAMD21 and SAMD51),
+//|     then call `microcontroller.reset()` to restart CircuitPython and have the
+//|     host computer remount CIRCUITPY.
+//|
+//|     This function can be called from the REPL when ``CIRCUITPY``
+//|     has become corrupted.
+//|
+//|     .. warning:: All the data on ``CIRCUITPY`` will be lost, and
+//|          CircuitPython will restart on certain boards."""
+//|     ...
+//|
+
+STATIC mp_obj_t storage_erase_filesystem(void) {
+    common_hal_storage_erase_filesystem();
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_0(storage_erase_filesystem_obj, storage_erase_filesystem);
+
+//| def disable_usb_drive() -> None:
+//|     """Disable presenting ``CIRCUITPY`` as a USB mass storage device.
+//|     By default, the device is enabled and ``CIRCUITPY`` is visible.
+//|     Can be called in ``boot.py``, before USB is connected."""
+//|     ...
+//|
+STATIC mp_obj_t storage_disable_usb_drive(void) {
+    #if CIRCUITPY_USB_MSC
+    if (!common_hal_storage_disable_usb_drive()) {
+    #else
+    if (true) {
+        #endif
+        mp_raise_RuntimeError(translate("Cannot change USB devices now"));
+    }
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_0(storage_disable_usb_drive_obj, storage_disable_usb_drive);
+
+//| def enable_usb_drive() -> None:
+//|     """Enabled presenting ``CIRCUITPY`` as a USB mass storage device.
+//|     By default, the device is enabled and ``CIRCUITPY`` is visible,
+//|     so you do not normally need to call this function.
+//|     Can be called in ``boot.py``, before USB is connected.
+//|
+//|     If you enable too many devices at once, you will run out of USB endpoints.
+//|     The number of available endpoints varies by microcontroller.
+//|     CircuitPython will go into safe mode after running boot.py to inform you if
+//|     not enough endpoints are available.
+//|     """
+//|     ...
+//|
+STATIC mp_obj_t storage_enable_usb_drive(void) {
+    #if CIRCUITPY_USB_MSC
+    if (!common_hal_storage_enable_usb_drive()) {
+    #else
+    if (true) {
+        #endif
+        mp_raise_RuntimeError(translate("Cannot change USB devices now"));
+    }
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_0(storage_enable_usb_drive_obj, storage_enable_usb_drive);
+
+STATIC const mp_rom_map_elem_t storage_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_storage) },
+
+    { MP_ROM_QSTR(MP_QSTR_mount),             MP_ROM_PTR(&storage_mount_obj) },
+    { MP_ROM_QSTR(MP_QSTR_umount),            MP_ROM_PTR(&storage_umount_obj) },
+    { MP_ROM_QSTR(MP_QSTR_remount),           MP_ROM_PTR(&storage_remount_obj) },
+    { MP_ROM_QSTR(MP_QSTR_getmount),          MP_ROM_PTR(&storage_getmount_obj) },
+    { MP_ROM_QSTR(MP_QSTR_erase_filesystem),  MP_ROM_PTR(&storage_erase_filesystem_obj) },
+    { MP_ROM_QSTR(MP_QSTR_disable_usb_drive), MP_ROM_PTR(&storage_disable_usb_drive_obj) },
+    { MP_ROM_QSTR(MP_QSTR_enable_usb_drive),  MP_ROM_PTR(&storage_enable_usb_drive_obj) },
+
+//| class VfsFat:
+//|     def __init__(self, block_device: str) -> None:
+//|         """Create a new VfsFat filesystem around the given block device.
+//|
+//|         :param block_device: Block device the the filesystem lives on"""
+//|
+//|     label: str
+//|     """The filesystem label, up to 11 case-insensitive bytes.  Note that
+//|     this property can only be set when the device is writable by the
+//|     microcontroller."""
+//|     ...
+//|
+//|     def mkfs(self) -> None:
+//|         """Format the block device, deleting any data that may have been there"""
+//|         ...
+//|
+//|     def open(self, path: str, mode: str) -> None:
+//|         """Like builtin ``open()``"""
+//|         ...
+//|
+//|     def ilistdir(self, path: str) -> Iterator[Union[Tuple[AnyStr, int, int, int], Tuple[AnyStr, int, int]]]:
+//|         """Return an iterator whose values describe files and folders within
+//|         ``path``"""
+//|         ...
+//|
+//|     def mkdir(self, path: str) -> None:
+//|         """Like `os.mkdir`"""
+//|         ...
+//|
+//|     def rmdir(self, path: str) -> None:
+//|         """Like `os.rmdir`"""
+//|         ...
+//|
+//|     def stat(self, path: str) -> Tuple[int, int, int, int, int, int, int, int, int, int]:
+//|         """Like `os.stat`"""
+//|         ...
+//|
+//|     def statvfs(self, path: int) -> Tuple[int, int, int, int, int, int, int, int, int, int]:
+//|         """Like `os.statvfs`"""
+//|         ...
+//|
+//|     def mount(self, readonly: bool, mkfs: VfsFat) -> None:
+//|         """Don't call this directly, call `storage.mount`."""
+//|         ...
+//|
+//|     def umount(self) -> None:
+//|         """Don't call this directly, call `storage.umount`."""
+//|         ...
+//|
+    { MP_ROM_QSTR(MP_QSTR_VfsFat), MP_ROM_PTR(&mp_fat_vfs_type) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(storage_module_globals, storage_module_globals_table);
+
+const mp_obj_module_t storage_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t *)&storage_module_globals,
+};
+
+MP_REGISTER_MODULE(MP_QSTR_storage, storage_module, CIRCUITPY_STORAGE);
diff --git a/circuitpython/shared-bindings/storage/__init__.h b/circuitpython/shared-bindings/storage/__init__.h
new file mode 100644
index 0000000..fbf492e
--- /dev/null
+++ b/circuitpython/shared-bindings/storage/__init__.h
@@ -0,0 +1,45 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
+ *
+ * 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.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_STORAGE___INIT___H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_STORAGE___INIT___H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "shared-module/storage/__init__.h"
+
+void common_hal_storage_mount(mp_obj_t vfs_obj, const char *path, bool readonly);
+void common_hal_storage_umount_path(const char *path);
+void common_hal_storage_umount_object(mp_obj_t vfs_obj);
+void common_hal_storage_remount(const char *path, bool readonly, bool disable_concurrent_write_protection);
+mp_obj_t common_hal_storage_getmount(const char *path);
+void common_hal_storage_erase_filesystem(void);
+
+bool common_hal_storage_disable_usb_drive(void);
+bool common_hal_storage_enable_usb_drive(void);
+
+#endif  // MICROPY_INCLUDED_SHARED_BINDINGS_STORAGE___INIT___H