136 lines
5.1 KiB
C
136 lines
5.1 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2015 Daniel Campora
|
|
* 2018 Tobias Badertscher
|
|
*
|
|
* 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 <stdio.h>
|
|
|
|
#include "py/runtime.h"
|
|
#include "py/gc.h"
|
|
#include "lib/utils/mpirq.h"
|
|
|
|
#if MICROPY_ENABLE_SCHEDULER
|
|
|
|
/******************************************************************************
|
|
DECLARE PUBLIC DATA
|
|
******************************************************************************/
|
|
|
|
const mp_arg_t mp_irq_init_args[] = {
|
|
{ MP_QSTR_handler, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE} },
|
|
{ MP_QSTR_trigger, MP_ARG_INT, {.u_int = 0} },
|
|
{ MP_QSTR_hard, MP_ARG_BOOL, {.u_bool = false} },
|
|
};
|
|
|
|
/******************************************************************************
|
|
DECLARE PRIVATE DATA
|
|
******************************************************************************/
|
|
|
|
/******************************************************************************
|
|
DEFINE PUBLIC FUNCTIONS
|
|
******************************************************************************/
|
|
|
|
mp_irq_obj_t *mp_irq_new(const mp_irq_methods_t *methods, mp_obj_t parent) {
|
|
mp_irq_obj_t *self = m_new0(mp_irq_obj_t, 1);
|
|
mp_irq_init(self, methods, parent);
|
|
return self;
|
|
}
|
|
|
|
void mp_irq_init(mp_irq_obj_t *self, const mp_irq_methods_t *methods, mp_obj_t parent) {
|
|
self->base.type = &mp_irq_type;
|
|
self->methods = (mp_irq_methods_t *)methods;
|
|
self->parent = parent;
|
|
self->handler = mp_const_none;
|
|
self->ishard = false;
|
|
}
|
|
|
|
void mp_irq_handler(mp_irq_obj_t *self) {
|
|
if (self->handler != mp_const_none) {
|
|
if (self->ishard) {
|
|
// When executing code within a handler we must lock the scheduler to
|
|
// prevent any scheduled callbacks from running, and lock the GC to
|
|
// prevent any memory allocations.
|
|
mp_sched_lock();
|
|
gc_lock();
|
|
nlr_buf_t nlr;
|
|
if (nlr_push(&nlr) == 0) {
|
|
mp_call_function_1(self->handler, self->parent);
|
|
nlr_pop();
|
|
} else {
|
|
// Uncaught exception; disable the callback so that it doesn't run again
|
|
self->methods->trigger(self->parent, 0);
|
|
self->handler = mp_const_none;
|
|
printf("Uncaught exception in IRQ callback handler\n");
|
|
mp_obj_print_exception(&mp_plat_print, MP_OBJ_FROM_PTR(nlr.ret_val));
|
|
}
|
|
gc_unlock();
|
|
mp_sched_unlock();
|
|
} else {
|
|
// Schedule call to user function
|
|
mp_sched_schedule(self->handler, self->parent);
|
|
}
|
|
}
|
|
}
|
|
|
|
/******************************************************************************/
|
|
// MicroPython bindings
|
|
|
|
STATIC mp_obj_t mp_irq_flags(mp_obj_t self_in) {
|
|
mp_irq_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
|
return mp_obj_new_int(self->methods->info(self->parent, MP_IRQ_INFO_FLAGS));
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_irq_flags_obj, mp_irq_flags);
|
|
|
|
STATIC mp_obj_t mp_irq_trigger(size_t n_args, const mp_obj_t *args) {
|
|
mp_irq_obj_t *self = MP_OBJ_TO_PTR(args[0]);
|
|
mp_obj_t ret_obj = mp_obj_new_int(self->methods->info(self->parent, MP_IRQ_INFO_TRIGGERS));
|
|
if (n_args == 2) {
|
|
// Set trigger
|
|
self->methods->trigger(self->parent, mp_obj_get_int(args[1]));
|
|
}
|
|
return ret_obj;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_irq_trigger_obj, 1, 2, mp_irq_trigger);
|
|
|
|
STATIC mp_obj_t mp_irq_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
|
|
mp_arg_check_num(n_args, n_kw, 0, 0, false);
|
|
mp_irq_handler(MP_OBJ_TO_PTR(self_in));
|
|
return mp_const_none;
|
|
}
|
|
|
|
STATIC const mp_rom_map_elem_t mp_irq_locals_dict_table[] = {
|
|
{ MP_ROM_QSTR(MP_QSTR_flags), MP_ROM_PTR(&mp_irq_flags_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_trigger), MP_ROM_PTR(&mp_irq_trigger_obj) },
|
|
};
|
|
STATIC MP_DEFINE_CONST_DICT(mp_irq_locals_dict, mp_irq_locals_dict_table);
|
|
|
|
const mp_obj_type_t mp_irq_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_irq,
|
|
.call = mp_irq_call,
|
|
.locals_dict = (mp_obj_dict_t *)&mp_irq_locals_dict,
|
|
};
|
|
|
|
#endif // MICROPY_ENABLE_SCHEDULER
|