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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2015 Daniel Campora
*
* 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/mpconfig.h"
#include "py/obj.h"
#include "py/runtime.h"
#include "py/gc.h"
#include "inc/hw_types.h"
#include "interrupt.h"
#include "pybsleep.h"
#include "mpexception.h"
#include "mperror.h"
#include "mpirq.h"
/******************************************************************************
DECLARE PUBLIC DATA
******************************************************************************/
const mp_arg_t mp_irq_init_args[] = {
{ MP_QSTR_trigger, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
{ MP_QSTR_priority, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1} }, // the lowest priority
{ MP_QSTR_handler, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
{ MP_QSTR_wake, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
};
/******************************************************************************
DECLARE PRIVATE DATA
******************************************************************************/
STATIC uint8_t mp_irq_priorities[] = { INT_PRIORITY_LVL_7, INT_PRIORITY_LVL_6, INT_PRIORITY_LVL_5, INT_PRIORITY_LVL_4,
INT_PRIORITY_LVL_3, INT_PRIORITY_LVL_2, INT_PRIORITY_LVL_1 };
/******************************************************************************
DEFINE PUBLIC FUNCTIONS
******************************************************************************/
void mp_irq_init0 (void) {
// initialize the callback objects list
mp_obj_list_init(&MP_STATE_PORT(mp_irq_obj_list), 0);
}
mp_obj_t mp_irq_new (mp_obj_t parent, mp_obj_t handler, const mp_irq_methods_t *methods) {
mp_irq_obj_t *self = m_new_obj(mp_irq_obj_t);
self->base.type = &mp_irq_type;
self->handler = handler;
self->parent = parent;
self->methods = (mp_irq_methods_t *)methods;
self->isenabled = true;
// remove it in case it was already registered
mp_irq_remove(parent);
mp_obj_list_append(&MP_STATE_PORT(mp_irq_obj_list), self);
return self;
}
mp_irq_obj_t *mp_irq_find (mp_obj_t parent) {
for (mp_uint_t i = 0; i < MP_STATE_PORT(mp_irq_obj_list).len; i++) {
mp_irq_obj_t *callback_obj = ((mp_irq_obj_t *)(MP_STATE_PORT(mp_irq_obj_list).items[i]));
if (callback_obj->parent == parent) {
return callback_obj;
}
}
return NULL;
}
void mp_irq_wake_all (void) {
// re-enable all active callback objects one by one
for (mp_uint_t i = 0; i < MP_STATE_PORT(mp_irq_obj_list).len; i++) {
mp_irq_obj_t *callback_obj = ((mp_irq_obj_t *)(MP_STATE_PORT(mp_irq_obj_list).items[i]));
if (callback_obj->isenabled) {
callback_obj->methods->enable(callback_obj->parent);
}
}
}
void mp_irq_disable_all (void) {
// re-enable all active callback objects one by one
for (mp_uint_t i = 0; i < MP_STATE_PORT(mp_irq_obj_list).len; i++) {
mp_irq_obj_t *callback_obj = ((mp_irq_obj_t *)(MP_STATE_PORT(mp_irq_obj_list).items[i]));
callback_obj->methods->disable(callback_obj->parent);
}
}
void mp_irq_remove (const mp_obj_t parent) {
mp_irq_obj_t *callback_obj;
if ((callback_obj = mp_irq_find(parent))) {
mp_obj_list_remove(&MP_STATE_PORT(mp_irq_obj_list), callback_obj);
}
}
uint mp_irq_translate_priority (uint priority) {
if (priority < 1 || priority > MP_ARRAY_SIZE(mp_irq_priorities)) {
mp_raise_ValueError(mpexception_value_invalid_arguments);
}
return mp_irq_priorities[priority - 1];
}
void mp_irq_handler (mp_obj_t self_in) {
mp_irq_obj_t *self = self_in;
if (self && self->handler != mp_const_none) {
// 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->disable (self->parent);
self->handler = mp_const_none;
// signal the error using the heart beat led and
// by printing a message
printf("Uncaught exception in callback handler\n");
mp_obj_print_exception(&mp_plat_print, (mp_obj_t)nlr.ret_val);
mperror_signal_error();
}
gc_unlock();
}
}
/******************************************************************************/
// MicroPython bindings
STATIC mp_obj_t mp_irq_init (mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
mp_irq_obj_t *self = pos_args[0];
// this is a bit of a hack, but it let us reuse the callback_create method from our parent
((mp_obj_t *)pos_args)[0] = self->parent;
self->methods->init (n_args, pos_args, kw_args);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(mp_irq_init_obj, 1, mp_irq_init);
STATIC mp_obj_t mp_irq_enable (mp_obj_t self_in) {
mp_irq_obj_t *self = self_in;
self->methods->enable(self->parent);
self->isenabled = true;
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_irq_enable_obj, mp_irq_enable);
STATIC mp_obj_t mp_irq_disable (mp_obj_t self_in) {
mp_irq_obj_t *self = self_in;
self->methods->disable(self->parent);
self->isenabled = false;
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_irq_disable_obj, mp_irq_disable);
STATIC mp_obj_t mp_irq_flags (mp_obj_t self_in) {
mp_irq_obj_t *self = self_in;
return mp_obj_new_int(self->methods->flags(self->parent));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_irq_flags_obj, mp_irq_flags);
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 (self_in);
return mp_const_none;
}
STATIC const mp_rom_map_elem_t mp_irq_locals_dict_table[] = {
// instance methods
{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&mp_irq_init_obj) },
{ MP_ROM_QSTR(MP_QSTR_enable), MP_ROM_PTR(&mp_irq_enable_obj) },
{ MP_ROM_QSTR(MP_QSTR_disable), MP_ROM_PTR(&mp_irq_disable_obj) },
{ MP_ROM_QSTR(MP_QSTR_flags), MP_ROM_PTR(&mp_irq_flags_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_t)&mp_irq_locals_dict,
};
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