125 lines
4.8 KiB
C
125 lines
4.8 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) 2015 Daniel Campora
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* 2018 Tobias Badertscher
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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 <stdio.h>
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#include "py/runtime.h"
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#include "py/gc.h"
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#include "lib/utils/mpirq.h"
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/******************************************************************************
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DECLARE PUBLIC DATA
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******************************************************************************/
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const mp_arg_t mp_irq_init_args[] = {
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{ MP_QSTR_handler, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE} },
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{ MP_QSTR_trigger, MP_ARG_INT, {.u_int = 0} },
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{ MP_QSTR_hard, MP_ARG_BOOL, {.u_bool = false} },
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};
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/******************************************************************************
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DECLARE PRIVATE DATA
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******************************************************************************/
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/******************************************************************************
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DEFINE PUBLIC FUNCTIONS
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******************************************************************************/
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mp_irq_obj_t *mp_irq_new(const mp_irq_methods_t *methods, mp_obj_t parent) {
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mp_irq_obj_t *self = m_new0(mp_irq_obj_t, 1);
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self->base.type = &mp_irq_type;
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self->methods = (mp_irq_methods_t *)methods;
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self->parent = parent;
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self->handler = mp_const_none;
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self->ishard = false;
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return self;
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}
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void mp_irq_handler(mp_irq_obj_t *self) {
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if (self->handler != mp_const_none) {
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if (self->ishard) {
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// When executing code within a handler we must lock the GC to prevent
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// any memory allocations.
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gc_lock();
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nlr_buf_t nlr;
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if (nlr_push(&nlr) == 0) {
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mp_call_function_1(self->handler, self->parent);
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nlr_pop();
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} else {
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// Uncaught exception; disable the callback so that it doesn't run again
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self->methods->trigger(self->parent, 0);
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self->handler = mp_const_none;
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printf("Uncaught exception in IRQ callback handler\n");
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mp_obj_print_exception(&mp_plat_print, MP_OBJ_FROM_PTR(nlr.ret_val));
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}
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gc_unlock();
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} else {
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// Schedule call to user function
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mp_sched_schedule(self->handler, self->parent);
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}
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}
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}
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/******************************************************************************/
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// MicroPython bindings
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STATIC mp_obj_t mp_irq_flags(mp_obj_t self_in) {
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mp_irq_obj_t *self = MP_OBJ_TO_PTR(self_in);
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return mp_obj_new_int(self->methods->info(self->parent, MP_IRQ_INFO_FLAGS));
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_irq_flags_obj, mp_irq_flags);
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STATIC mp_obj_t mp_irq_trigger(size_t n_args, const mp_obj_t *args) {
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mp_irq_obj_t *self = MP_OBJ_TO_PTR(args[0]);
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mp_obj_t ret_obj = mp_obj_new_int(self->methods->info(self->parent, MP_IRQ_INFO_TRIGGERS));
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if (n_args == 2) {
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// Set trigger
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self->methods->trigger(self->parent, mp_obj_get_int(args[1]));
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}
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return ret_obj;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_irq_trigger_obj, 1, 2, mp_irq_trigger);
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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) {
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mp_arg_check_num(n_args, n_kw, 0, 0, false);
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mp_irq_handler(MP_OBJ_TO_PTR(self_in));
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return mp_const_none;
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}
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STATIC const mp_rom_map_elem_t mp_irq_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_flags), MP_ROM_PTR(&mp_irq_flags_obj) },
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{ MP_ROM_QSTR(MP_QSTR_trigger), MP_ROM_PTR(&mp_irq_trigger_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(mp_irq_locals_dict, mp_irq_locals_dict_table);
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const mp_obj_type_t mp_irq_type = {
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{ &mp_type_type },
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.name = MP_QSTR_irq,
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.call = mp_irq_call,
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.locals_dict = (mp_obj_dict_t *)&mp_irq_locals_dict,
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};
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