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extmod/modbluetooth: Change scan result's "connectable" to "adv_type". 

This commit changes the BLE _IRQ_SCAN_RESULT data from:

    addr_type, addr, connectable, rssi, adv_data

to:

    addr_type, addr, adv_type, rssi, adv_data

This allows _IRQ_SCAN_RESULT to handle all scan result types (not just
connectable and non-connectable passive scans), and to distinguish between
them using adv_type which is an integer taking values 0x00-0x04 per the BT
specification.

This is a breaking change to the API, albeit a very minor one: the existing
connectable value was a boolean and True now becomes 0x00, False becomes
0x02.

Documentation is updated and a test added.

Fixes #5738.
This commit is contained in:
Damien George 2020-03-10 11:45:03 +11:00
parent bd746a4630
commit dd0bc26e65
7 changed files with 55 additions and 42 deletions
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12
docs/library/ubluetooth.rst
View File

@ -93,7 +93,7 @@ Event Handling
conn_handle, attr_handle = data
elif event == _IRQ_SCAN_RESULT:
# A single scan result.
addr_type, addr, connectable, rssi, adv_data = data
addr_type, addr, adv_type, rssi, adv_data = data
elif event == _IRQ_SCAN_COMPLETE:
# Scan duration finished or manually stopped.
pass
@ -185,7 +185,15 @@ Observer Role (Scanner)
interval and window are 1.28 seconds and 11.25 milliseconds respectively
(background scanning).
For each scan result, the ``_IRQ_SCAN_RESULT`` event will be raised.
For each scan result the ``_IRQ_SCAN_RESULT`` event will be raised, with event
data ``(addr_type, addr, adv_type, rssi, adv_data)``. ``adv_type`` values correspond
to the Bluetooth Specification:
* 0x00 - ADV_IND - connectable and scannable undirected advertising
* 0x01 - ADV_DIRECT_IND - connectable directed advertising
* 0x02 - ADV_SCAN_IND - scannable undirected advertising
* 0x03 - ADV_NONCONN_IND - non-connectable undirected advertising
* 0x04 - SCAN_RSP - scan response
When scanning is stopped (either due to the duration finishing or when
explicitly stopped), the ``_IRQ_SCAN_COMPLETE`` event will be raised.

8
extmod/btstack/modbluetooth_btstack.c
View File

@ -115,11 +115,9 @@ STATIC void btstack_packet_handler(uint8_t packet_type, uint16_t channel, uint8_
int8_t rssi = gap_event_advertising_report_get_rssi(packet);
uint8_t length = gap_event_advertising_report_get_data_length(packet);
const uint8_t *data = gap_event_advertising_report_get_data(packet);
bool connectable = adv_event_type == 0 || adv_event_type == 1;
if (adv_event_type <= 2) {
mp_bluetooth_gap_on_scan_result(address_type, address, connectable, rssi, data, length);
} else if (adv_event_type == 4) {
// TODO: Scan response.
// Emit an event for all advertising types except SCAN_RSP.
if (adv_event_type < 4) {
mp_bluetooth_gap_on_scan_result(address_type, address, adv_event_type, rssi, data, length);
}
} else if (event_type == HCI_EVENT_DISCONNECTION_COMPLETE) {
DEBUG_EVENT_printf(" --> hci disconnect complete\n");

34
extmod/modbluetooth.c
View File

@ -774,8 +774,8 @@ const mp_obj_module_t mp_module_ubluetooth = {
#include <stdio.h>
STATIC void ringbuf_extract(ringbuf_t *ringbuf, mp_obj_tuple_t *data_tuple, size_t n_u16, size_t n_u8, mp_obj_str_t *bytes_addr, size_t n_b, size_t n_i8, mp_obj_bluetooth_uuid_t *uuid, mp_obj_str_t *bytes_data) {
assert(ringbuf_avail(ringbuf) >= n_u16 * 2 + n_u8 + (bytes_addr ? 6 : 0) + n_b + n_i8 + (uuid ? 1 : 0) + (bytes_data ? 1 : 0));
STATIC void ringbuf_extract(ringbuf_t *ringbuf, mp_obj_tuple_t *data_tuple, size_t n_u16, size_t n_u8, mp_obj_str_t *bytes_addr, size_t n_i8, mp_obj_bluetooth_uuid_t *uuid, mp_obj_str_t *bytes_data) {
assert(ringbuf_avail(ringbuf) >= n_u16 * 2 + n_u8 + (bytes_addr ? 6 : 0) + n_i8 + (uuid ? 1 : 0) + (bytes_data ? 1 : 0));
int j = 0;
for (int i = 0; i < n_u16; ++i) {
@ -792,10 +792,7 @@ STATIC void ringbuf_extract(ringbuf_t *ringbuf, mp_obj_tuple_t *data_tuple, size
}
data_tuple->items[j++] = MP_OBJ_FROM_PTR(bytes_addr);
}
if (n_b) {
data_tuple->items[j++] = mp_obj_new_bool(ringbuf_get(ringbuf));
}
if (n_i8) {
for (int i = 0; i < n_i8; ++i) {
// Note the int8_t got packed into the ringbuf as a uint8_t.
data_tuple->items[j++] = MP_OBJ_NEW_SMALL_INT((int8_t)ringbuf_get(ringbuf));
}
@ -843,32 +840,32 @@ STATIC mp_obj_t bluetooth_ble_invoke_irq(mp_obj_t none_in) {
if (event == MP_BLUETOOTH_IRQ_CENTRAL_CONNECT || event == MP_BLUETOOTH_IRQ_PERIPHERAL_CONNECT || event == MP_BLUETOOTH_IRQ_CENTRAL_DISCONNECT || event == MP_BLUETOOTH_IRQ_PERIPHERAL_DISCONNECT) {
// conn_handle, addr_type, addr
ringbuf_extract(&o->ringbuf, data_tuple, 1, 1, &o->irq_data_addr, 0, 0, NULL, NULL);
ringbuf_extract(&o->ringbuf, data_tuple, 1, 1, &o->irq_data_addr, 0, NULL, NULL);
} else if (event == MP_BLUETOOTH_IRQ_GATTS_WRITE) {
// conn_handle, value_handle
ringbuf_extract(&o->ringbuf, data_tuple, 2, 0, NULL, 0, 0, NULL, NULL);
ringbuf_extract(&o->ringbuf, data_tuple, 2, 0, NULL, 0, NULL, NULL);
#if MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
} else if (event == MP_BLUETOOTH_IRQ_SCAN_RESULT) {
// addr_type, addr, connectable, rssi, adv_data
ringbuf_extract(&o->ringbuf, data_tuple, 0, 1, &o->irq_data_addr, 1, 1, NULL, &o->irq_data_data);
// addr_type, addr, adv_type, rssi, adv_data
ringbuf_extract(&o->ringbuf, data_tuple, 0, 1, &o->irq_data_addr, 2, NULL, &o->irq_data_data);
} else if (event == MP_BLUETOOTH_IRQ_SCAN_COMPLETE) {
// No params required.
data_tuple->len = 0;
} else if (event == MP_BLUETOOTH_IRQ_GATTC_SERVICE_RESULT) {
// conn_handle, start_handle, end_handle, uuid
ringbuf_extract(&o->ringbuf, data_tuple, 3, 0, NULL, 0, 0, &o->irq_data_uuid, NULL);
ringbuf_extract(&o->ringbuf, data_tuple, 3, 0, NULL, 0, &o->irq_data_uuid, NULL);
} else if (event == MP_BLUETOOTH_IRQ_GATTC_CHARACTERISTIC_RESULT) {
// conn_handle, def_handle, value_handle, properties, uuid
ringbuf_extract(&o->ringbuf, data_tuple, 3, 1, NULL, 0, 0, &o->irq_data_uuid, NULL);
ringbuf_extract(&o->ringbuf, data_tuple, 3, 1, NULL, 0, &o->irq_data_uuid, NULL);
} else if (event == MP_BLUETOOTH_IRQ_GATTC_DESCRIPTOR_RESULT) {
// conn_handle, handle, uuid
ringbuf_extract(&o->ringbuf, data_tuple, 2, 0, NULL, 0, 0, &o->irq_data_uuid, NULL);
ringbuf_extract(&o->ringbuf, data_tuple, 2, 0, NULL, 0, &o->irq_data_uuid, NULL);
} else if (event == MP_BLUETOOTH_IRQ_GATTC_READ_RESULT || event == MP_BLUETOOTH_IRQ_GATTC_NOTIFY || event == MP_BLUETOOTH_IRQ_GATTC_INDICATE) {
// conn_handle, value_handle, data
ringbuf_extract(&o->ringbuf, data_tuple, 2, 0, NULL, 0, 0, NULL, &o->irq_data_data);
ringbuf_extract(&o->ringbuf, data_tuple, 2, 0, NULL, 0, NULL, &o->irq_data_data);
} else if (event == MP_BLUETOOTH_IRQ_GATTC_WRITE_STATUS) {
// conn_handle, value_handle, status
ringbuf_extract(&o->ringbuf, data_tuple, 3, 0, NULL, 0, 0, NULL, NULL);
ringbuf_extract(&o->ringbuf, data_tuple, 3, 0, NULL, 0, NULL, NULL);
#endif // MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
}
@ -903,7 +900,7 @@ STATIC bool enqueue_irq(mp_obj_bluetooth_ble_t *o, size_t len, uint16_t event) {
// Front of the queue is a scan result, remove it.
// event, addr_type, addr, connectable, rssi
// event, addr_type, addr, adv_type, rssi
int n = 2 + 1 + 6 + 1 + 1;
for (int i = 0; i < n; ++i) {
ringbuf_get(&o->ringbuf);
@ -963,7 +960,7 @@ void mp_bluetooth_gap_on_scan_complete(void) {
MICROPY_PY_BLUETOOTH_EXIT
}
void mp_bluetooth_gap_on_scan_result(uint8_t addr_type, const uint8_t *addr, bool connectable, const int8_t rssi, const uint8_t *data, size_t data_len) {
void mp_bluetooth_gap_on_scan_result(uint8_t addr_type, const uint8_t *addr, uint8_t adv_type, const int8_t rssi, const uint8_t *data, size_t data_len) {
MICROPY_PY_BLUETOOTH_ENTER
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
data_len = MIN(o->irq_data_data_alloc, data_len);
@ -972,7 +969,8 @@ void mp_bluetooth_gap_on_scan_result(uint8_t addr_type, const uint8_t *addr, boo
for (int i = 0; i < 6; ++i) {
ringbuf_put(&o->ringbuf, addr[i]);
}
ringbuf_put(&o->ringbuf, connectable ? 1 : 0);
// The adv_type will get extracted as an int8_t but that's ok because valid values are 0x00-0x04.
ringbuf_put(&o->ringbuf, adv_type);
// Note conversion of int8_t rssi to uint8_t. Must un-convert on the way out.
ringbuf_put(&o->ringbuf, (uint8_t)rssi);
ringbuf_put(&o->ringbuf, data_len);

2
extmod/modbluetooth.h
View File

@ -248,7 +248,7 @@ bool mp_bluetooth_gatts_on_read_request(uint16_t conn_handle, uint16_t value_han
void mp_bluetooth_gap_on_scan_complete(void);
// Notify modbluetooth of a scan result.
void mp_bluetooth_gap_on_scan_result(uint8_t addr_type, const uint8_t *addr, bool connectable, const int8_t rssi, const uint8_t *data, size_t data_len);
void mp_bluetooth_gap_on_scan_result(uint8_t addr_type, const uint8_t *addr, uint8_t adv_type, const int8_t rssi, const uint8_t *data, size_t data_len);
// Notify modbluetooth that a service was found (either by discover-all, or discover-by-uuid).
void mp_bluetooth_gattc_on_primary_service_result(uint16_t conn_handle, uint16_t start_handle, uint16_t end_handle, mp_obj_bluetooth_uuid_t *service_uuid);

13
extmod/nimble/modbluetooth_nimble.c
View File

@ -634,16 +634,9 @@ STATIC int gap_scan_cb(struct ble_gap_event *event, void *arg) {
return 0;
}
if (event->disc.event_type == BLE_HCI_ADV_RPT_EVTYPE_ADV_IND || event->disc.event_type == BLE_HCI_ADV_RPT_EVTYPE_NONCONN_IND) {
bool connectable = event->disc.event_type == BLE_HCI_ADV_RPT_EVTYPE_ADV_IND;
uint8_t addr[6];
reverse_addr_byte_order(addr, event->disc.addr.val);
mp_bluetooth_gap_on_scan_result(event->disc.addr.type, addr, connectable, event->disc.rssi, event->disc.data, event->disc.length_data);
} else if (event->disc.event_type == BLE_HCI_ADV_RPT_EVTYPE_SCAN_RSP) {
// TODO
} else if (event->disc.event_type == BLE_HCI_ADV_RPT_EVTYPE_SCAN_IND) {
// TODO
}
uint8_t addr[6];
reverse_addr_byte_order(addr, event->disc.addr.val);
mp_bluetooth_gap_on_scan_result(event->disc.addr.type, addr, event->disc.event_type, event->disc.rssi, event->disc.data, event->disc.length_data);
return 0;
}

24
tests/multi_bluetooth/ble_gap_advertise.py
View File

@ -11,34 +11,48 @@ ADV_TIME_S = 3
def instance0():
multitest.globals(BDADDR=ble.config("mac"))
print("gap_advertise(20_000)")
ble.gap_advertise(20_000, b"\x02\x01\x06\x04\xffMPY")
multitest.next()
print("gap_advertise(100_000, connectable=False)")
ble.gap_advertise(100_000, b"\x02\x01\x06\x04\xffMPY", connectable=False)
time.sleep(ADV_TIME_S)
print("gap_advertise(20_000, connectable=True)")
ble.gap_advertise(20_000, b"\x02\x01\x06\x04\xffMPY", connectable=True)
time.sleep(ADV_TIME_S)
print("gap_advertise(None)")
ble.gap_advertise(None)
ble.active(0)
def instance1():
multitest.next()
finished = False
adv_types = set()
adv_data = None
def irq(ev, data):
nonlocal finished, adv_data
nonlocal finished, adv_types, adv_data
if ev == _IRQ_SCAN_RESULT:
if data[1] == BDADDR:
adv_data = bytes(data[4])
adv_types.add(data[2])
if adv_data is None:
adv_data = bytes(data[4])
else:
if adv_data != data[4]:
adv_data = "MISMATCH"
elif ev == _IRQ_SCAN_COMPLETE:
finished = True
ble.config(rxbuf=2000)
ble.irq(irq)
ble.gap_scan(ADV_TIME_S * 1000, 10000, 10000)
ble.gap_scan(2 * ADV_TIME_S * 1000, 10000, 10000)
while not finished:
machine.idle()
ble.active(0)
print("adv_types:", sorted(adv_types))
print("adv_data:", adv_data)

4
tests/multi_bluetooth/ble_gap_advertise.py.exp
View File

@ -1,5 +1,7 @@
--- instance0 ---
gap_advertise(20_000)
gap_advertise(100_000, connectable=False)
gap_advertise(20_000, connectable=True)
gap_advertise(None)
--- instance1 ---
adv_types: [0, 2]
adv_data: b'\x02\x01\x06\x04\xffMPY'