ed14435a8e
Previously the interaction between the different layers of the Bluetooth stack was different on each port and each stack. This commit defines common interfaces between them and implements them for cyw43, btstack, nimble, stm32, unix.
117 lines
3.8 KiB
C
117 lines
3.8 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 <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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#if MICROPY_PY_BLUETOOTH && MICROPY_BLUETOOTH_BTSTACK && MICROPY_BLUETOOTH_BTSTACK_USB
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#include "lib/btstack/src/btstack.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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