128 lines
5.9 KiB
C
128 lines
5.9 KiB
C
/*
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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) 2022 Jeff Epler for Adafruit Industries
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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 "shared-bindings/floppyio/__init__.h"
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#include "shared-bindings/digitalio/DigitalInOut.h"
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#include "common-hal/floppyio/__init__.h"
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#include <stdint.h>
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#include "py/binary.h"
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#include "py/obj.h"
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#include "py/runtime.h"
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//| def flux_readinto(buffer: WriteableBuffer, data: digitalio.DigitalInOut, index: digitalio.DigitalInOut) -> int:
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//| """Read flux transition information into the buffer.
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//|
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//| The function returns when the buffer has filled, or when the index input
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//| indicates that one full revolution of data has been recorded. Due to
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//| technical limitations, this process may not be interruptible by
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//| KeyboardInterrupt.
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//|
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//| :param buffer: Read data into this buffer. Each element represents the time between successive zero-to-one transitions.
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//| :param data: Pin on which the flux data appears
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//| :param index: Pin on which the index pulse appears
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//| :return: The actual number of bytes of read
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//| """
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//| ...
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//|
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STATIC mp_obj_t floppyio_flux_readinto(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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enum { ARG_buffer, ARG_data, ARG_index };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_buffer, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
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{ MP_QSTR_data, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
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{ MP_QSTR_index, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
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};
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(args[ARG_buffer].u_obj, &bufinfo, MP_BUFFER_WRITE);
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digitalio_digitalinout_obj_t *data = assert_digitalinout(args[ARG_data].u_obj);
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digitalio_digitalinout_obj_t *index = assert_digitalinout(args[ARG_index].u_obj);
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return MP_OBJ_NEW_SMALL_INT(common_hal_floppyio_flux_readinto(bufinfo.buf, bufinfo.len, data, index));
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}
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MP_DEFINE_CONST_FUN_OBJ_KW(floppyio_flux_readinto_obj, 0, floppyio_flux_readinto);
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//| def mfm_readinto(buffer: WriteableBuffer, data: digitalio.DigitalInOut, index: digitalio.DigitalInOut) -> int:
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//| """Read mfm blocks into the buffer.
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//|
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//| The track is assumed to consist of 512-byte sectors.
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//|
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//| The function returns when all sectors have been successfully read, or
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//| a number of index pulses have occurred. Due to technical limitations, this
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//| process may not be interruptible by KeyboardInterrupt.
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//|
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//| :param buffer: Read data into this buffer. Must be a multiple of 512.
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//| :param data: Pin on which the mfm data appears
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//| :param index: Pin on which the index pulse appears
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//| :return: The actual number of sectors read
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//| """
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//| ...
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//|
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STATIC mp_obj_t floppyio_mfm_readinto(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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enum { ARG_buffer, ARG_data, ARG_index };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_buffer, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
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{ MP_QSTR_data, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
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{ MP_QSTR_index, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
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};
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(args[ARG_buffer].u_obj, &bufinfo, MP_BUFFER_WRITE);
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digitalio_digitalinout_obj_t *data = assert_digitalinout(args[ARG_data].u_obj);
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digitalio_digitalinout_obj_t *index = assert_digitalinout(args[ARG_index].u_obj);
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if (bufinfo.len % 512 != 0) {
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mp_raise_ValueError(translate("Buffer must be a multiple of 512 bytes"));
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}
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size_t n_sectors = bufinfo.len / 512;
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return MP_OBJ_NEW_SMALL_INT(common_hal_floppyio_mfm_readinto(bufinfo.buf, n_sectors, data, index));
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}
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MP_DEFINE_CONST_FUN_OBJ_KW(floppyio_mfm_readinto_obj, 0, floppyio_mfm_readinto);
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//| samplerate: int
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//| """The approximate sample rate in Hz used by flux_readinto."""
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//|
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STATIC const mp_rom_map_elem_t floppyio_module_globals_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_floppyio) },
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{ MP_ROM_QSTR(MP_QSTR_flux_readinto), MP_ROM_PTR(&floppyio_flux_readinto_obj) },
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{ MP_ROM_QSTR(MP_QSTR_mfm_readinto), MP_ROM_PTR(&floppyio_mfm_readinto_obj) },
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{ MP_ROM_QSTR(MP_QSTR_samplerate), MP_ROM_INT(FLOPPYIO_SAMPLERATE) },
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};
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STATIC MP_DEFINE_CONST_DICT(floppyio_module_globals, floppyio_module_globals_table);
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const mp_obj_module_t floppyio_module = {
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.base = {&mp_type_module },
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.globals = (mp_obj_dict_t *)&floppyio_module_globals,
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};
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MP_REGISTER_MODULE(MP_QSTR_floppyio, floppyio_module, CIRCUITPY_FLOPPYIO);
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