kopia lustrzana https://github.com/micropython/micropython
76 wiersze
2.9 KiB
C
76 wiersze
2.9 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, 2014 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/obj.h"
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#include "py/mphal.h"
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#include "irq.h"
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/// \moduleref pyb
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#if IRQ_ENABLE_STATS
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uint32_t irq_stats[FPU_IRQn + 1] = {0};
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#endif
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/// \function wfi()
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/// Wait for an interrupt.
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/// This executies a `wfi` instruction which reduces power consumption
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/// of the MCU until an interrupt occurs, at which point execution continues.
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STATIC mp_obj_t pyb_wfi(void) {
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__WFI();
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_0(pyb_wfi_obj, pyb_wfi);
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/// \function disable_irq()
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/// Disable interrupt requests.
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/// Returns the previous IRQ state: `False`/`True` for disabled/enabled IRQs
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/// respectively. This return value can be passed to enable_irq to restore
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/// the IRQ to its original state.
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STATIC mp_obj_t pyb_disable_irq(void) {
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return mp_obj_new_bool(disable_irq() == IRQ_STATE_ENABLED);
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}
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MP_DEFINE_CONST_FUN_OBJ_0(pyb_disable_irq_obj, pyb_disable_irq);
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/// \function enable_irq(state=True)
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/// Enable interrupt requests.
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/// If `state` is `True` (the default value) then IRQs are enabled.
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/// If `state` is `False` then IRQs are disabled. The most common use of
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/// this function is to pass it the value returned by `disable_irq` to
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/// exit a critical section.
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STATIC mp_obj_t pyb_enable_irq(uint n_args, const mp_obj_t *arg) {
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enable_irq((n_args == 0 || mp_obj_is_true(arg[0])) ? IRQ_STATE_ENABLED : IRQ_STATE_DISABLED);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_enable_irq_obj, 0, 1, pyb_enable_irq);
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#if IRQ_ENABLE_STATS
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// return a memoryview of the irq statistics array
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STATIC mp_obj_t pyb_irq_stats(void) {
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return mp_obj_new_memoryview(0x80 | 'I', MP_ARRAY_SIZE(irq_stats), &irq_stats[0]);
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}
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MP_DEFINE_CONST_FUN_OBJ_0(pyb_irq_stats_obj, pyb_irq_stats);
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#endif
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