202 lines
7.6 KiB
C
202 lines
7.6 KiB
C
/*
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* This file is part of the Micro Python 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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*
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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 "std.h"
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#include "py/mpconfig.h"
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#include "py/obj.h"
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#include "py/runtime.h"
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#include "py/gc.h"
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#include "inc/hw_types.h"
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#include "interrupt.h"
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#include "pybsleep.h"
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#include "mpexception.h"
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#include "mperror.h"
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#include "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_trigger, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
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{ MP_QSTR_priority, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1} }, // the lowest priority
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{ MP_QSTR_handler, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
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{ MP_QSTR_wake, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
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};
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/******************************************************************************
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DECLARE PRIVATE DATA
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******************************************************************************/
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STATIC uint8_t mp_irq_priorities[] = { INT_PRIORITY_LVL_7, INT_PRIORITY_LVL_6, INT_PRIORITY_LVL_5, INT_PRIORITY_LVL_4,
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INT_PRIORITY_LVL_3, INT_PRIORITY_LVL_2, INT_PRIORITY_LVL_1 };
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/******************************************************************************
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DEFINE PUBLIC FUNCTIONS
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******************************************************************************/
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void mp_irq_init0 (void) {
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// initialize the callback objects list
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mp_obj_list_init(&MP_STATE_PORT(mp_irq_obj_list), 0);
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}
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mp_obj_t mp_irq_new (mp_obj_t parent, mp_obj_t handler, const mp_irq_methods_t *methods) {
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mp_irq_obj_t *self = m_new_obj(mp_irq_obj_t);
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self->base.type = &mp_irq_type;
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self->handler = handler;
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self->parent = parent;
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self->methods = (mp_irq_methods_t *)methods;
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self->isenabled = true;
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// remove it in case it was already registered
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mp_irq_remove(parent);
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mp_obj_list_append(&MP_STATE_PORT(mp_irq_obj_list), self);
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return self;
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}
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mp_irq_obj_t *mp_irq_find (mp_obj_t parent) {
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for (mp_uint_t i = 0; i < MP_STATE_PORT(mp_irq_obj_list).len; i++) {
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mp_irq_obj_t *callback_obj = ((mp_irq_obj_t *)(MP_STATE_PORT(mp_irq_obj_list).items[i]));
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if (callback_obj->parent == parent) {
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return callback_obj;
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}
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}
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return NULL;
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}
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void mp_irq_wake_all (void) {
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// re-enable all active callback objects one by one
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for (mp_uint_t i = 0; i < MP_STATE_PORT(mp_irq_obj_list).len; i++) {
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mp_irq_obj_t *callback_obj = ((mp_irq_obj_t *)(MP_STATE_PORT(mp_irq_obj_list).items[i]));
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if (callback_obj->isenabled) {
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callback_obj->methods->enable(callback_obj->parent);
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}
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}
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}
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void mp_irq_disable_all (void) {
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// re-enable all active callback objects one by one
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for (mp_uint_t i = 0; i < MP_STATE_PORT(mp_irq_obj_list).len; i++) {
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mp_irq_obj_t *callback_obj = ((mp_irq_obj_t *)(MP_STATE_PORT(mp_irq_obj_list).items[i]));
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callback_obj->methods->disable(callback_obj->parent);
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}
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}
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void mp_irq_remove (const mp_obj_t parent) {
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mp_irq_obj_t *callback_obj;
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if ((callback_obj = mp_irq_find(parent))) {
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mp_obj_list_remove(&MP_STATE_PORT(mp_irq_obj_list), callback_obj);
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}
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}
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uint mp_irq_translate_priority (uint priority) {
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if (priority < 1 || priority > MP_ARRAY_SIZE(mp_irq_priorities)) {
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mp_raise_ValueError(mpexception_value_invalid_arguments);
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}
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return mp_irq_priorities[priority - 1];
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}
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void mp_irq_handler (mp_obj_t self_in) {
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mp_irq_obj_t *self = self_in;
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if (self && self->handler != mp_const_none) {
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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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}
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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->disable (self->parent);
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self->handler = mp_const_none;
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// signal the error using the heart beat led and
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// by printing a message
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printf("Uncaught exception in callback handler\n");
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mp_obj_print_exception(&mp_plat_print, (mp_obj_t)nlr.ret_val);
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mperror_signal_error();
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}
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gc_unlock();
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}
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}
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/******************************************************************************/
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// Micro Python bindings
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STATIC mp_obj_t mp_irq_init (mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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mp_irq_obj_t *self = pos_args[0];
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// this is a bit of a hack, but it let us reuse the callback_create method from our parent
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((mp_obj_t *)pos_args)[0] = self->parent;
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self->methods->init (n_args, pos_args, kw_args);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_KW(mp_irq_init_obj, 1, mp_irq_init);
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STATIC mp_obj_t mp_irq_enable (mp_obj_t self_in) {
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mp_irq_obj_t *self = self_in;
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self->methods->enable(self->parent);
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self->isenabled = true;
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_irq_enable_obj, mp_irq_enable);
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STATIC mp_obj_t mp_irq_disable (mp_obj_t self_in) {
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mp_irq_obj_t *self = self_in;
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self->methods->disable(self->parent);
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self->isenabled = false;
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_irq_disable_obj, mp_irq_disable);
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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 = self_in;
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return mp_obj_new_int(self->methods->flags(self->parent));
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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_call (mp_obj_t self_in, mp_uint_t n_args, mp_uint_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 (self_in);
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return mp_const_none;
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}
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STATIC const mp_map_elem_t mp_irq_locals_dict_table[] = {
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// instance methods
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{ MP_OBJ_NEW_QSTR(MP_QSTR_init), (mp_obj_t)&mp_irq_init_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_enable), (mp_obj_t)&mp_irq_enable_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_disable), (mp_obj_t)&mp_irq_disable_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_flags), (mp_obj_t)&mp_irq_flags_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_t)&mp_irq_locals_dict,
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};
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