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/*
* 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 "shared/runtime/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);
MP_DEFINE_CONST_OBJ_TYPE(
mp_irq_type,
MP_QSTR_irq,
MP_TYPE_FLAG_NONE,
call, mp_irq_call,
locals_dict, &mp_irq_locals_dict
);
#endif // MICROPY_ENABLE_SCHEDULER
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