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