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extmod/btstack: Implement notifications/indications for GATT clients.

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Work done in collaboration with Jim Mussared aka @jimmo.
This commit is contained in:
Damien George 2020-03-06 12:37:37 +11:00
parent 018ce122ca
commit d7259f6b1c
2 changed files with 47 additions and 1 deletions
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37
extmod/btstack/modbluetooth_btstack.c
View File

@ -135,6 +135,7 @@ STATIC void btstack_packet_handler(uint8_t packet_type, uint16_t channel, uint8_
}
uint8_t addr[6] = {0};
mp_bluetooth_gap_on_connected_disconnected(irq_event, conn_handle, 0xff, addr);
#if MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
} else if (event_type == GATT_EVENT_QUERY_COMPLETE) {
DEBUG_EVENT_printf(" --> gatt query complete\n");
} else if (event_type == GATT_EVENT_SERVICE_QUERY_RESULT) {
@ -169,6 +170,25 @@ STATIC void btstack_packet_handler(uint8_t packet_type, uint16_t channel, uint8_
mp_bluetooth_gattc_on_data_available_chunk(data, len);
mp_bluetooth_gattc_on_data_available_end();
MICROPY_PY_BLUETOOTH_EXIT
} else if (event_type == GATT_EVENT_NOTIFICATION) {
DEBUG_EVENT_printf(" --> gatt notification\n");
uint16_t conn_handle = gatt_event_notification_get_handle(packet);
uint16_t value_handle = gatt_event_notification_get_value_handle(packet);
uint16_t len = gatt_event_notification_get_value_length(packet);
const uint8_t *data = gatt_event_notification_get_value(packet);
len = mp_bluetooth_gattc_on_data_available_start(MP_BLUETOOTH_IRQ_GATTC_NOTIFY, conn_handle, value_handle, len);
mp_bluetooth_gattc_on_data_available_chunk(data, len);
mp_bluetooth_gattc_on_data_available_end();
} else if (event_type == GATT_EVENT_INDICATION) {
DEBUG_EVENT_printf(" --> gatt indication\n");
uint16_t conn_handle = gatt_event_indication_get_handle(packet);
uint16_t value_handle = gatt_event_indication_get_value_handle(packet);
uint16_t len = gatt_event_indication_get_value_length(packet);
const uint8_t *data = gatt_event_indication_get_value(packet);
len = mp_bluetooth_gattc_on_data_available_start(MP_BLUETOOTH_IRQ_GATTC_INDICATE, conn_handle, value_handle, len);
mp_bluetooth_gattc_on_data_available_chunk(data, len);
mp_bluetooth_gattc_on_data_available_end();
#endif
} else {
DEBUG_EVENT_printf(" --> hci event type: unknown (0x%02x)\n", event_type);
}
@ -225,11 +245,26 @@ int mp_bluetooth_init(void) {
hci_event_callback_registration.callback = &btstack_packet_handler;
hci_add_event_handler(&hci_event_callback_registration);
#if MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
// Enable GATT_EVENT_NOTIFICATION/GATT_EVENT_INDICATION for all connections and handles.
gatt_client_listen_for_characteristic_value_updates(&MP_STATE_PORT(bluetooth_btstack_root_pointers)->notification, &btstack_packet_handler, GATT_CLIENT_ANY_CONNECTION, NULL);
#endif
return 0;
}
void mp_bluetooth_deinit(void) {
DEBUG_EVENT_printf("mp_bluetooth_deinit\n");
if (!MP_STATE_PORT(bluetooth_btstack_root_pointers)) {
return;
}
#if MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
// Remove our registration for notify/indicate.
gatt_client_stop_listening_for_characteristic_value_updates(&MP_STATE_PORT(bluetooth_btstack_root_pointers)->notification);
#endif
mp_bluetooth_btstack_port_deinit();
mp_bluetooth_btstack_state = MP_BLUETOOTH_BTSTACK_STATE_OFF;
@ -560,6 +595,6 @@ int mp_bluetooth_gattc_write(uint16_t conn_handle, uint16_t value_handle, const
return MP_EINVAL;
}
#endif
#endif // MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
#endif // MICROPY_PY_BLUETOOTH && MICROPY_BLUETOOTH_BTSTACK

11
extmod/btstack/modbluetooth_btstack.h
View File

@ -27,8 +27,12 @@
#ifndef MICROPY_INCLUDED_EXTMOD_BTSTACK_MODBLUETOOTH_BTSTACK_H
#define MICROPY_INCLUDED_EXTMOD_BTSTACK_MODBLUETOOTH_BTSTACK_H
#if MICROPY_PY_BLUETOOTH && MICROPY_BLUETOOTH_BTSTACK
#include "extmod/modbluetooth.h"
#include "lib/btstack/src/btstack.h"
typedef struct _mp_bluetooth_btstack_root_pointers_t {
// This stores both the advertising data and the scan response data, concatenated together.
uint8_t *adv_data;
@ -37,6 +41,11 @@ typedef struct _mp_bluetooth_btstack_root_pointers_t {
// Characteristic (and descriptor) value storage.
mp_gatts_db_t gatts_db;
#if MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
// Registration for notify/indicate events.
gatt_client_notification_t notification;
#endif
} mp_bluetooth_btstack_root_pointers_t;
enum {
@ -51,4 +60,6 @@ void mp_bluetooth_btstack_port_init(void);
void mp_bluetooth_btstack_port_deinit(void);
void mp_bluetooth_btstack_port_start(void);
#endif // MICROPY_PY_BLUETOOTH && MICROPY_BLUETOOTH_BTSTACK
#endif // MICROPY_INCLUDED_EXTMOD_BTSTACK_MODBLUETOOTH_BTSTACK_H