micropython/ports/rp2/mpbtstackport.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2020-2021 Damien P. George
*
* 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 "py/runtime.h"
#include "py/mperrno.h"
#include "py/mphal.h"
#define DEBUG_printf(...)
#define BTSTACK_ENABLE_HCI_DUMP (0)
#if MICROPY_PY_BLUETOOTH && MICROPY_BLUETOOTH_BTSTACK
#include "lib/btstack/src/btstack.h"
#include "lib/btstack/platform/embedded/hci_dump_embedded_stdout.h"
#include "extmod/mpbthci.h"
#include "extmod/btstack/modbluetooth_btstack.h"
#include "mpbthciport.h"
#include "pico/btstack_hci_transport_cyw43.h"
void mp_bluetooth_hci_poll_in_ms(uint32_t ms);
static btstack_linked_list_t mp_btstack_runloop_timers;
static void mp_btstack_runloop_init(void) {
mp_btstack_runloop_timers = NULL;
}
static void mp_btstack_runloop_set_timer(btstack_timer_source_t *tim, uint32_t timeout_ms) {
DEBUG_printf("mp_btstack_runloop_set_timer %lu\n", timeout_ms);
tim->timeout = mp_hal_ticks_ms() + timeout_ms + 1;
}
static void mp_btstack_runloop_add_timer(btstack_timer_source_t *tim) {
DEBUG_printf("mp_btstack_runloop_add_timer %lu\n", tim->timeout);
btstack_linked_item_t **node = &mp_btstack_runloop_timers;
for (; *node; node = &(*node)->next) {
btstack_timer_source_t *node_tim = (btstack_timer_source_t *)*node;
if (node_tim == tim) {
// Timer is already in the list, don't add it.
return;
}
int32_t delta = btstack_time_delta(tim->timeout, node_tim->timeout);
if (delta < 0) {
// Found sorted location in list.
break;
}
}
// Insert timer into list in sorted location.
tim->item.next = *node;
*node = &tim->item;
// Reschedule the HCI poll if this timer is at the head of the list.
if (mp_btstack_runloop_timers == &tim->item) {
int32_t delta_ms = btstack_time_delta(tim->timeout, mp_hal_ticks_ms());
mp_bluetooth_hci_poll_in_ms(delta_ms);
}
}
static bool mp_btstack_runloop_remove_timer(btstack_timer_source_t *tim) {
return btstack_linked_list_remove(&mp_btstack_runloop_timers, (btstack_linked_item_t *)tim);
}
static uint32_t mp_btstack_runloop_get_time_ms(void) {
return mp_hal_ticks_ms();
}
static const btstack_run_loop_t mp_btstack_runloop_rp2 = {
&mp_btstack_runloop_init,
&btstack_run_loop_base_add_data_source,
&btstack_run_loop_base_remove_data_source,
&btstack_run_loop_base_enable_data_source_callbacks,
&btstack_run_loop_base_disable_data_source_callbacks,
&mp_btstack_runloop_set_timer,
&mp_btstack_runloop_add_timer,
&mp_btstack_runloop_remove_timer,
NULL, // execute
NULL, // dump_timer
&mp_btstack_runloop_get_time_ms,
&mp_bluetooth_hci_poll_now, // poll_data_sources_from_irq
NULL, // execute_on_main_thread
NULL, // trigger_exit
};
void mp_bluetooth_hci_poll(void) {
if (mp_bluetooth_btstack_state == MP_BLUETOOTH_BTSTACK_STATE_OFF) {
return;
}
// Process BT data.
if (mp_bluetooth_btstack_state != MP_BLUETOOTH_BTSTACK_STATE_HALTING) {
btstack_run_loop_base_poll_data_sources();
}
// Process any BTstack timers.
while (mp_btstack_runloop_timers != NULL) {
btstack_timer_source_t *tim = (btstack_timer_source_t *)mp_btstack_runloop_timers;
int32_t delta_ms = btstack_time_delta(tim->timeout, mp_hal_ticks_ms());
if (delta_ms > 0) {
// Timer has not expired yet, reschedule HCI poll for this timer.
mp_bluetooth_hci_poll_in_ms(delta_ms);
break;
}
btstack_linked_list_pop(&mp_btstack_runloop_timers);
tim->process(tim);
}
}
void mp_bluetooth_btstack_port_init(void) {
btstack_run_loop_init(&mp_btstack_runloop_rp2);
#if BTSTACK_ENABLE_HCI_DUMP
hci_dump_init(hci_dump_embedded_stdout_get_instance());
#endif
const hci_transport_t *transport = hci_transport_cyw43_instance();
hci_init(transport, NULL);
}
void mp_bluetooth_btstack_port_deinit(void) {
hci_power_control(HCI_POWER_OFF);
// We really need hci to be closed or else we might get a BT interrupt going off and
// this will cause a crash when calling btstack_run_loop_poll_data_sources_from_irq after the btstack run loop has been deleted
if (mp_bluetooth_btstack_state != MP_BLUETOOTH_BTSTACK_STATE_OFF) {
hci_transport_cyw43_instance()->close();
}
hci_close();
}
void mp_bluetooth_btstack_port_start(void) {
hci_power_control(HCI_POWER_ON);
}
#endif // MICROPY_PY_BLUETOOTH && MICROPY_BLUETOOTH_BTSTACK