kopia lustrzana https://github.com/micropython/micropython
120 wiersze
3.9 KiB
C
120 wiersze
3.9 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) 2020 Jim Mussared
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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 "py/mpconfig.h"
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#if MICROPY_PY_BLUETOOTH && MICROPY_BLUETOOTH_BTSTACK && MICROPY_BLUETOOTH_BTSTACK_USB
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#include <pthread.h>
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#include <unistd.h>
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#include "py/runtime.h"
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#include "py/mperrno.h"
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#include "py/mphal.h"
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#include "lib/btstack/src/btstack.h"
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#include "lib/btstack/src/hci_transport_usb.h"
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#include "lib/btstack/platform/embedded/btstack_run_loop_embedded.h"
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#include "lib/btstack/platform/embedded/hal_cpu.h"
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#include "lib/btstack/platform/embedded/hal_time_ms.h"
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#include "extmod/btstack/modbluetooth_btstack.h"
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#include "mpbtstackport.h"
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#if !MICROPY_PY_THREAD
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#error Unix btstack requires MICROPY_PY_THREAD
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#endif
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static const useconds_t USB_POLL_INTERVAL_US = 1000;
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void mp_bluetooth_btstack_port_init_usb(void) {
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// MICROPYBTUSB can be a ':'' or '-' separated port list.
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char *path = getenv("MICROPYBTUSB");
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if (path != NULL) {
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uint8_t usb_path[7] = {0};
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size_t usb_path_len = 0;
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while (usb_path_len < MP_ARRAY_SIZE(usb_path)) {
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char *delimiter;
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usb_path[usb_path_len++] = strtol(path, &delimiter, 16);
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if (!delimiter || (*delimiter != ':' && *delimiter != '-')) {
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break;
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}
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path = delimiter + 1;
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}
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hci_transport_usb_set_path(usb_path_len, usb_path);
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}
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hci_init(hci_transport_usb_instance(), NULL);
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}
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static pthread_t bstack_thread_id;
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void mp_bluetooth_btstack_port_deinit(void) {
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hci_power_control(HCI_POWER_OFF);
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// Wait for the poll loop to terminate when the state is set to OFF.
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pthread_join(bstack_thread_id, NULL);
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}
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// Provided by mpbstackport_common.c.
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extern bool mp_bluetooth_hci_poll(void);
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static void *btstack_thread(void *arg) {
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(void)arg;
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hci_power_control(HCI_POWER_ON);
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// modbluetooth_btstack.c will have set the state to STARTING before
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// calling mp_bluetooth_btstack_port_start.
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// This loop will terminate when the HCI_POWER_OFF above results
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// in modbluetooth_btstack.c setting the state back to OFF.
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// Or, if a timeout results in it being set to TIMEOUT.
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while (true) {
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if (!mp_bluetooth_hci_poll()) {
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break;
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}
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// The USB transport schedules events to the run loop at 1ms intervals,
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// and the implementation currently polls rather than selects.
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usleep(USB_POLL_INTERVAL_US);
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}
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return NULL;
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}
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void mp_bluetooth_btstack_port_start(void) {
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// Create a thread to run the btstack loop.
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pthread_attr_t attr;
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pthread_attr_init(&attr);
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pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
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pthread_create(&bstack_thread_id, &attr, &btstack_thread, NULL);
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}
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#endif // MICROPY_PY_BLUETOOTH && MICROPY_BLUETOOTH_BTSTACK && MICROPY_BLUETOOTH_BTSTACK_USB
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