/* * 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 #include "py/runtime.h" #include "py/gc.h" #include "lib/utils/mpirq.h" /****************************************************************************** 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); self->base.type = &mp_irq_type; self->methods = (mp_irq_methods_t*)methods; self->parent = parent; self->handler = mp_const_none; self->ishard = false; return self; } 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 GC to prevent // any memory allocations. 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(); } 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, };