152 lines
5.1 KiB
Python
152 lines
5.1 KiB
Python
# Write characteristic from central to peripheral and time data rate.
|
|
|
|
from micropython import const
|
|
import time, machine, bluetooth
|
|
|
|
TIMEOUT_MS = 2000
|
|
|
|
_IRQ_CENTRAL_CONNECT = const(1)
|
|
_IRQ_CENTRAL_DISCONNECT = const(2)
|
|
_IRQ_GATTS_WRITE = const(3)
|
|
_IRQ_PERIPHERAL_CONNECT = const(7)
|
|
_IRQ_PERIPHERAL_DISCONNECT = const(8)
|
|
_IRQ_GATTC_CHARACTERISTIC_RESULT = const(11)
|
|
_IRQ_GATTC_CHARACTERISTIC_DONE = const(12)
|
|
_IRQ_GATTC_WRITE_DONE = const(17)
|
|
_IRQ_MTU_EXCHANGED = const(21)
|
|
|
|
# How long to run the test for.
|
|
_NUM_NOTIFICATIONS = const(40)
|
|
_MTU_SIZE = const(131)
|
|
_CHAR_SIZE = const(_MTU_SIZE - 3)
|
|
|
|
SERVICE_UUID = bluetooth.UUID("A5A5A5A5-FFFF-9999-1111-5A5A5A5A5A5A")
|
|
CHAR_UUID = bluetooth.UUID("00000000-1111-2222-3333-444444444444")
|
|
CHAR = (CHAR_UUID, bluetooth.FLAG_WRITE | bluetooth.FLAG_WRITE_NO_RESPONSE)
|
|
SERVICE = (SERVICE_UUID, (CHAR,))
|
|
SERVICES = (SERVICE,)
|
|
|
|
packet_sequence = 0
|
|
waiting_events = {}
|
|
|
|
|
|
def irq(event, data):
|
|
if event == _IRQ_CENTRAL_CONNECT:
|
|
waiting_events[event] = data[0]
|
|
elif event == _IRQ_PERIPHERAL_CONNECT:
|
|
waiting_events[event] = data[0]
|
|
elif event == _IRQ_GATTS_WRITE:
|
|
global packet_sequence
|
|
conn_handle, attr_handle = data
|
|
data = ble.gatts_read(attr_handle)
|
|
if not (data[0] == packet_sequence and data[-1] == (256 - packet_sequence) & 0xFF):
|
|
print("_IRQ_GATTS_WRITE data invalid:", packet_sequence, data)
|
|
elif packet_sequence % 10 == 0:
|
|
print("_IRQ_GATTS_WRITE", packet_sequence)
|
|
packet_sequence += 1
|
|
elif event == _IRQ_GATTC_CHARACTERISTIC_RESULT:
|
|
# conn_handle, def_handle, value_handle, properties, uuid = data
|
|
if data[-1] == CHAR_UUID:
|
|
waiting_events[event] = data[2]
|
|
else:
|
|
return
|
|
elif event == _IRQ_MTU_EXCHANGED:
|
|
# ATT MTU exchange complete (either initiated by us or the remote device).
|
|
conn_handle, mtu = data
|
|
print("_IRQ_MTU_EXCHANGED:", mtu)
|
|
|
|
if event not in waiting_events:
|
|
waiting_events[event] = None
|
|
|
|
|
|
def wait_for_event(event, timeout_ms):
|
|
t0 = time.ticks_ms()
|
|
while time.ticks_diff(time.ticks_ms(), t0) < timeout_ms:
|
|
if event in waiting_events:
|
|
return waiting_events.pop(event)
|
|
machine.idle()
|
|
raise ValueError("Timeout waiting for {}".format(event))
|
|
|
|
|
|
# Acting in peripheral role.
|
|
def instance0():
|
|
multitest.globals(BDADDR=ble.config("mac"))
|
|
((char_handle,),) = ble.gatts_register_services(SERVICES)
|
|
ble.gatts_set_buffer(char_handle, _CHAR_SIZE)
|
|
print("gap_advertise")
|
|
ble.gap_advertise(20_000, b"\x02\x01\x06\x04\xffMPY")
|
|
multitest.next()
|
|
try:
|
|
# Wait for central to connect to us.
|
|
conn_handle = wait_for_event(_IRQ_CENTRAL_CONNECT, TIMEOUT_MS)
|
|
# Wait for central to disconnect us.
|
|
wait_for_event(_IRQ_CENTRAL_DISCONNECT, 30000)
|
|
print("final packet_sequence:", packet_sequence)
|
|
finally:
|
|
ble.active(0)
|
|
|
|
|
|
# Acting in central role.
|
|
def instance1():
|
|
global packet_sequence
|
|
((char_handle,),) = ble.gatts_register_services(SERVICES)
|
|
multitest.next()
|
|
try:
|
|
# Connect to peripheral and then disconnect.
|
|
print("gap_connect")
|
|
ble.config(mtu=_MTU_SIZE)
|
|
ble.gap_connect(*BDADDR)
|
|
conn_handle = wait_for_event(_IRQ_PERIPHERAL_CONNECT, TIMEOUT_MS)
|
|
ble.gattc_exchange_mtu(conn_handle)
|
|
|
|
# Discover characteristics.
|
|
ble.gattc_discover_characteristics(conn_handle, 1, 65535)
|
|
value_handle = wait_for_event(_IRQ_GATTC_CHARACTERISTIC_RESULT, TIMEOUT_MS)
|
|
wait_for_event(_IRQ_GATTC_CHARACTERISTIC_DONE, TIMEOUT_MS)
|
|
|
|
# Send data!
|
|
data = bytearray(ord("A") + (i % 64) for i in range(_CHAR_SIZE))
|
|
for mode in (0, 1):
|
|
ticks_start = time.ticks_ms()
|
|
for i in range(_NUM_NOTIFICATIONS):
|
|
data[0] = packet_sequence
|
|
data[-1] = 256 - packet_sequence
|
|
if packet_sequence % 10 == 0:
|
|
print("gattc_write", packet_sequence)
|
|
if mode == 0:
|
|
while True:
|
|
try:
|
|
ble.gattc_write(conn_handle, value_handle, data, mode)
|
|
break
|
|
except OSError:
|
|
pass
|
|
else:
|
|
ble.gattc_write(conn_handle, value_handle, data, mode)
|
|
wait_for_event(_IRQ_GATTC_WRITE_DONE, TIMEOUT_MS)
|
|
packet_sequence += 1
|
|
|
|
ticks_end = time.ticks_ms()
|
|
ticks_total = time.ticks_diff(ticks_end, ticks_start)
|
|
|
|
multitest.output_metric(
|
|
"Did {} writes in {} ms. {} ms/write, {} bytes/sec".format(
|
|
_NUM_NOTIFICATIONS,
|
|
ticks_total,
|
|
ticks_total / _NUM_NOTIFICATIONS,
|
|
_NUM_NOTIFICATIONS * len(data) * 1000 // ticks_total,
|
|
)
|
|
)
|
|
|
|
time.sleep_ms(100)
|
|
|
|
# DIsconnect the peripheral.
|
|
print("gap_disconnect:", ble.gap_disconnect(conn_handle))
|
|
wait_for_event(_IRQ_PERIPHERAL_DISCONNECT, 20000)
|
|
finally:
|
|
ble.active(0)
|
|
|
|
|
|
ble = bluetooth.BLE()
|
|
ble.active(1)
|
|
ble.irq(irq)
|