815920c87f
Work done in collaboration with @jimmo. Signed-off-by: Damien George <damien@micropython.org>
122 lines
4.6 KiB
C
122 lines
4.6 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) 2013-2016 Damien P. George
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* Copyright (c) 2016 Paul Sokolovsky
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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/mpconfig.h"
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#if MICROPY_PY_UTIME_MP_HAL
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#include <string.h>
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#include "py/obj.h"
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#include "py/mphal.h"
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#include "py/smallint.h"
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#include "py/runtime.h"
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#include "extmod/utime_mphal.h"
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STATIC mp_obj_t time_sleep(mp_obj_t seconds_o) {
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#if MICROPY_PY_BUILTINS_FLOAT
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mp_hal_delay_ms((mp_uint_t)(1000 * mp_obj_get_float(seconds_o)));
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#else
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mp_hal_delay_ms(1000 * mp_obj_get_int(seconds_o));
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#endif
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(mp_utime_sleep_obj, time_sleep);
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STATIC mp_obj_t time_sleep_ms(mp_obj_t arg) {
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mp_int_t ms = mp_obj_get_int(arg);
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if (ms >= 0) {
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mp_hal_delay_ms(ms);
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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_1(mp_utime_sleep_ms_obj, time_sleep_ms);
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STATIC mp_obj_t time_sleep_us(mp_obj_t arg) {
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mp_int_t us = mp_obj_get_int(arg);
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if (us > 0) {
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mp_hal_delay_us(us);
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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_1(mp_utime_sleep_us_obj, time_sleep_us);
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STATIC mp_obj_t time_ticks_ms(void) {
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return MP_OBJ_NEW_SMALL_INT(mp_hal_ticks_ms() & (MICROPY_PY_UTIME_TICKS_PERIOD - 1));
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}
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MP_DEFINE_CONST_FUN_OBJ_0(mp_utime_ticks_ms_obj, time_ticks_ms);
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STATIC mp_obj_t time_ticks_us(void) {
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return MP_OBJ_NEW_SMALL_INT(mp_hal_ticks_us() & (MICROPY_PY_UTIME_TICKS_PERIOD - 1));
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}
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MP_DEFINE_CONST_FUN_OBJ_0(mp_utime_ticks_us_obj, time_ticks_us);
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STATIC mp_obj_t time_ticks_cpu(void) {
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return MP_OBJ_NEW_SMALL_INT(mp_hal_ticks_cpu() & (MICROPY_PY_UTIME_TICKS_PERIOD - 1));
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}
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MP_DEFINE_CONST_FUN_OBJ_0(mp_utime_ticks_cpu_obj, time_ticks_cpu);
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STATIC mp_obj_t time_ticks_diff(mp_obj_t end_in, mp_obj_t start_in) {
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// we assume that the arguments come from ticks_xx so are small ints
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mp_uint_t start = MP_OBJ_SMALL_INT_VALUE(start_in);
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mp_uint_t end = MP_OBJ_SMALL_INT_VALUE(end_in);
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// Optimized formula avoiding if conditions. We adjust difference "forward",
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// wrap it around and adjust back.
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mp_int_t diff = ((end - start + MICROPY_PY_UTIME_TICKS_PERIOD / 2) & (MICROPY_PY_UTIME_TICKS_PERIOD - 1))
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- MICROPY_PY_UTIME_TICKS_PERIOD / 2;
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return MP_OBJ_NEW_SMALL_INT(diff);
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}
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MP_DEFINE_CONST_FUN_OBJ_2(mp_utime_ticks_diff_obj, time_ticks_diff);
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STATIC mp_obj_t time_ticks_add(mp_obj_t ticks_in, mp_obj_t delta_in) {
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// we assume that first argument come from ticks_xx so is small int
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mp_uint_t ticks = MP_OBJ_SMALL_INT_VALUE(ticks_in);
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mp_uint_t delta = mp_obj_get_int(delta_in);
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// Check that delta does not overflow the range that ticks_diff can handle.
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// This ensures the following:
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// - ticks_diff(ticks_add(T, delta), T) == delta
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// - ticks_diff(T, ticks_add(T, delta)) == -delta
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// The latter requires excluding delta=-TICKS_PERIOD/2.
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//
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// This unsigned comparison is equivalent to a signed comparison of:
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// delta <= TICKS_PERIOD/2 || delta >= TICKS_PERIOD/2
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if (delta + MICROPY_PY_UTIME_TICKS_PERIOD / 2 - 1 >= MICROPY_PY_UTIME_TICKS_PERIOD - 1) {
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mp_raise_msg(&mp_type_OverflowError, MP_ERROR_TEXT("ticks interval overflow"));
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}
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return MP_OBJ_NEW_SMALL_INT((ticks + delta) & (MICROPY_PY_UTIME_TICKS_PERIOD - 1));
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}
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MP_DEFINE_CONST_FUN_OBJ_2(mp_utime_ticks_add_obj, time_ticks_add);
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// Returns the number of nanoseconds since the Epoch, as an integer.
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STATIC mp_obj_t time_time_ns(void) {
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return mp_obj_new_int_from_ull(mp_hal_time_ns());
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}
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MP_DEFINE_CONST_FUN_OBJ_0(mp_utime_time_ns_obj, time_time_ns);
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#endif // MICROPY_PY_UTIME_MP_HAL
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