mirror of
https://github.com/licsber/micropython.git
synced 2024-09-20 09:00:23 +08:00
e5cbb70328
These functions are generally 1 machine instruction, and are used in critical code, so makes sense to have them inline. Also leave these functions uninverted (ie 0 means enable, 1 means disable) and provide macro constants if you really need to distinguish the states. This makes for smaller code as well (combined with inlining). Applied to teensy port as well.
67 lines
2.6 KiB
C
67 lines
2.6 KiB
C
/*
|
|
* This file is part of the Micro Python project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2013, 2014 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 "mpconfig.h"
|
|
#include "misc.h"
|
|
#include "nlr.h"
|
|
#include "qstr.h"
|
|
#include "obj.h"
|
|
#include "irq.h"
|
|
|
|
#include MICROPY_HAL_H
|
|
|
|
/// \function wfi()
|
|
/// Wait for an interrupt.
|
|
/// This executies a `wfi` instruction which reduces power consumption
|
|
/// of the MCU until an interrupt occurs, at which point execution continues.
|
|
STATIC mp_obj_t pyb_wfi(void) {
|
|
__WFI();
|
|
return mp_const_none;
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_0(pyb_wfi_obj, pyb_wfi);
|
|
|
|
/// \function disable_irq()
|
|
/// Disable interrupt requests.
|
|
/// Returns the previous IRQ state: `False`/`True` for disabled/enabled IRQs
|
|
/// respectively. This return value can be passed to enable_irq to restore
|
|
/// the IRQ to its original state.
|
|
STATIC mp_obj_t pyb_disable_irq(void) {
|
|
return MP_BOOL(disable_irq() == IRQ_STATE_ENABLED);
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_0(pyb_disable_irq_obj, pyb_disable_irq);
|
|
|
|
/// \function enable_irq(state=True)
|
|
/// Enable interrupt requests.
|
|
/// If `state` is `True` (the default value) then IRQs are enabled.
|
|
/// If `state` is `False` then IRQs are disabled. The most common use of
|
|
/// this function is to pass it the value returned by `disable_irq` to
|
|
/// exit a critical section.
|
|
STATIC mp_obj_t pyb_enable_irq(uint n_args, const mp_obj_t *arg) {
|
|
enable_irq((n_args == 0 || mp_obj_is_true(arg[0])) ? IRQ_STATE_ENABLED : IRQ_STATE_DISABLED);
|
|
return mp_const_none;
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_enable_irq_obj, 0, 1, pyb_enable_irq);
|