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Diffstat (limited to 'circuitpython/shared-bindings/nvm/ByteArray.c')
| -rw-r--r-- | circuitpython/shared-bindings/nvm/ByteArray.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/circuitpython/shared-bindings/nvm/ByteArray.c b/circuitpython/shared-bindings/nvm/ByteArray.c new file mode 100644 index 0000000..6e34b76 --- /dev/null +++ b/circuitpython/shared-bindings/nvm/ByteArray.c @@ -0,0 +1,178 @@ +/* + * This file is part of the Micro Python 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. + */ + +#include "py/binary.h" +#include "py/objproperty.h" +#include "py/runtime.h" +#include "py/runtime0.h" +#include "shared-bindings/nvm/ByteArray.h" +#include "supervisor/shared/translate.h" + +//| class ByteArray: +//| r"""Presents a stretch of non-volatile memory as a bytearray. +//| +//| Non-volatile memory is available as a byte array that persists over reloads +//| and power cycles. Each assignment causes an erase and write cycle so its recommended to assign +//| all values to change at once. +//| +//| Usage:: +//| +//| import microcontroller +//| microcontroller.nvm[0:3] = b"\xcc\x10\x00" +//| """ +//| + +//| def __init__(self) -> None: +//| """Not currently dynamically supported. Access the sole instance through `microcontroller.nvm`.""" +//| ... +//| + +//| def __bool__(self) -> bool: +//| ... +//| +//| def __len__(self) -> int: +//| """Return the length. This is used by (`len`)""" +//| ... +//| +STATIC mp_obj_t nvm_bytearray_unary_op(mp_unary_op_t op, mp_obj_t self_in) { + nvm_bytearray_obj_t *self = MP_OBJ_TO_PTR(self_in); + uint16_t len = common_hal_nvm_bytearray_get_length(self); + switch (op) { + case MP_UNARY_OP_BOOL: + return mp_obj_new_bool(len != 0); + case MP_UNARY_OP_LEN: + return MP_OBJ_NEW_SMALL_INT(len); + default: + return MP_OBJ_NULL; // op not supported + } +} + +STATIC const mp_rom_map_elem_t nvm_bytearray_locals_dict_table[] = { +}; + +STATIC MP_DEFINE_CONST_DICT(nvm_bytearray_locals_dict, nvm_bytearray_locals_dict_table); + +//| @overload +//| def __getitem__(self, index: slice) -> bytearray: ... +//| @overload +//| def __getitem__(self, index: int) -> int: +//| """Returns the value at the given index.""" +//| ... +//| +//| @overload +//| def __setitem__(self, index: slice, value: ReadableBuffer) -> None: ... +//| @overload +//| def __setitem__(self, index: int, value: int) -> None: +//| """Set the value at the given index.""" +//| ... +//| +STATIC mp_obj_t nvm_bytearray_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value) { + if (value == MP_OBJ_NULL) { + // delete item + // slice deletion + return MP_OBJ_NULL; // op not supported + } else { + nvm_bytearray_obj_t *self = MP_OBJ_TO_PTR(self_in); + if (0) { + #if MICROPY_PY_BUILTINS_SLICE + } else if (mp_obj_is_type(index_in, &mp_type_slice)) { + mp_bound_slice_t slice; + if (!mp_seq_get_fast_slice_indexes(common_hal_nvm_bytearray_get_length(self), index_in, &slice)) { + mp_raise_NotImplementedError(translate("only slices with step=1 (aka None) are supported")); + } + if (value != MP_OBJ_SENTINEL) { + #if MICROPY_PY_ARRAY_SLICE_ASSIGN + // Assign + size_t src_len = slice.stop - slice.start; + uint8_t *src_items; + if (mp_obj_is_type(value, &mp_type_array) || + mp_obj_is_type(value, &mp_type_bytearray) || + mp_obj_is_type(value, &mp_type_memoryview) || + mp_obj_is_type(value, &mp_type_bytes)) { + mp_buffer_info_t bufinfo; + mp_get_buffer_raise(value, &bufinfo, MP_BUFFER_READ); + if (bufinfo.len != src_len) { + mp_raise_ValueError(translate("Slice and value different lengths.")); + } + src_len = bufinfo.len; + src_items = bufinfo.buf; + if (1 != mp_binary_get_size('@', bufinfo.typecode, NULL)) { + mp_raise_ValueError(translate("Array values should be single bytes.")); + } + } else { + mp_raise_NotImplementedError(translate("array/bytes required on right side")); + } + + if (!common_hal_nvm_bytearray_set_bytes(self, slice.start, src_items, src_len)) { + mp_raise_RuntimeError(translate("Unable to write to nvm.")); + } + return mp_const_none; + #else + return MP_OBJ_NULL; // op not supported + #endif + } else { + // Read slice. + size_t len = slice.stop - slice.start; + uint8_t *items = m_new(uint8_t, len); + common_hal_nvm_bytearray_get_bytes(self, slice.start, len, items); + return mp_obj_new_bytearray_by_ref(len, items); + } + #endif + } else { + // Single index rather than slice. + size_t index = mp_get_index(self->base.type, common_hal_nvm_bytearray_get_length(self), + index_in, false); + if (value == MP_OBJ_SENTINEL) { + // load + uint8_t value_out; + common_hal_nvm_bytearray_get_bytes(self, index, 1, &value_out); + return MP_OBJ_NEW_SMALL_INT(value_out); + } else { + // store + mp_int_t byte_value = mp_obj_get_int(value); + if (byte_value > 0xff || byte_value < 0) { + mp_raise_ValueError(translate("Bytes must be between 0 and 255.")); + } + uint8_t short_value = byte_value; + if (!common_hal_nvm_bytearray_set_bytes(self, index, &short_value, 1)) { + mp_raise_RuntimeError(translate("Unable to write to nvm.")); + } + return mp_const_none; + } + } + } +} + +const mp_obj_type_t nvm_bytearray_type = { + { &mp_type_type }, + .flags = MP_TYPE_FLAG_EXTENDED, + .name = MP_QSTR_ByteArray, + .locals_dict = (mp_obj_t)&nvm_bytearray_locals_dict, + MP_TYPE_EXTENDED_FIELDS( + .subscr = nvm_bytearray_subscr, + .unary_op = nvm_bytearray_unary_op, + ), +}; |