66 lines
2.5 KiB
C
66 lines
2.5 KiB
C
/*
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* This file is part of the MicroPython 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) 2021 Jim Mussared
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* Copyright (c) 2021 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/runtime.h"
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#include "py/mphal.h"
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#include "extmod/modmachine.h"
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#if MICROPY_PY_MACHINE_BITSTREAM
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// Timing is a 4-tuple of (high_time_0, low_time_0, high_time_1, low_time_1)
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// suitable for driving WS2812.
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#define MICROPY_MACHINE_BITSTREAM_TYPE_HIGH_LOW (0)
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// machine.bitstream(pin, encoding, (timing), bytes)
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STATIC mp_obj_t machine_bitstream_(size_t n_args, const mp_obj_t *args) {
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mp_hal_pin_obj_t pin = mp_hal_get_pin_obj(args[0]);
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int encoding = mp_obj_get_int(args[1]);
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(args[3], &bufinfo, MP_BUFFER_READ);
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switch (encoding) {
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case MICROPY_MACHINE_BITSTREAM_TYPE_HIGH_LOW: {
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uint32_t timing_ns[4];
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mp_obj_t *timing;
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mp_obj_get_array_fixed_n(args[2], 4, &timing);
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for (size_t i = 0; i < 4; ++i) {
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timing_ns[i] = mp_obj_get_int(timing[i]);
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}
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machine_bitstream_high_low(pin, timing_ns, bufinfo.buf, bufinfo.len);
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break;
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}
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default:
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mp_raise_ValueError(MP_ERROR_TEXT("encoding"));
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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_VAR_BETWEEN(machine_bitstream_obj, 4, 4, machine_bitstream_);
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#endif // MICROPY_PY_MACHINE_BITSTREAM
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