circuitpython/shared-module/usb_midi/__init__.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2018 hathach for Adafruit Industries
*
* 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 "shared-bindings/usb_midi/__init__.h"
#include "genhdr/autogen_usb_descriptor.h"
#include "py/obj.h"
#include "py/mphal.h"
#include "py/runtime.h"
#include "py/objtuple.h"
#include "shared-bindings/usb_midi/PortIn.h"
#include "shared-bindings/usb_midi/PortOut.h"
#include "supervisor/memory.h"
#include "tusb.h"
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supervisor_allocation *usb_midi_allocation;
// Is the USB MIDI device enabled?
static bool usb_midi_enabled;
void usb_midi_init(void) {
usb_midi_enabled = true;
}
void usb_midi_usb_init(void) {
mp_obj_tuple_t *ports;
if (usb_midi_enabled) {
// TODO(tannewt): Make this dynamic.
size_t tuple_size = align32_size(sizeof(mp_obj_tuple_t) + sizeof(mp_obj_t *) * 2);
size_t portin_size = align32_size(sizeof(usb_midi_portin_obj_t));
size_t portout_size = align32_size(sizeof(usb_midi_portout_obj_t));
// For each embedded MIDI Jack in the descriptor we create a Port
usb_midi_allocation = allocate_memory(tuple_size + portin_size + portout_size, false, false);
ports = (mp_obj_tuple_t *)usb_midi_allocation->ptr;
ports->base.type = &mp_type_tuple;
ports->len = 2;
usb_midi_portin_obj_t *in = (usb_midi_portin_obj_t *)(usb_midi_allocation->ptr + tuple_size / 4);
in->base.type = &usb_midi_portin_type;
ports->items[0] = MP_OBJ_FROM_PTR(in);
usb_midi_portout_obj_t *out = (usb_midi_portout_obj_t *)(usb_midi_allocation->ptr + tuple_size / 4 + portin_size / 4);
out->base.type = &usb_midi_portout_type;
ports->items[1] = MP_OBJ_FROM_PTR(out);
} else {
ports = mp_const_empty_tuple;
}
mp_map_lookup(&usb_midi_module_globals.map, MP_ROM_QSTR(MP_QSTR_ports), MP_MAP_LOOKUP)->value = MP_OBJ_FROM_PTR(ports);
}
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bool common_hal_usb_midi_configure_usb(bool enabled) {
// We can't change the descriptors once we're connected.
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if (tud_connected()) {
return false;
}
usb_midi_enabled = enabled;
return true;
}