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# Test GATTC/S data transfer between peripheral and central, and use of gatts_set_buffer()
from micropython import const
import time, machine, bluetooth
TIMEOUT_MS = 5000
_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_SERVICE_RESULT = const(9)
_IRQ_GATTC_SERVICE_DONE = const(10)
_IRQ_GATTC_CHARACTERISTIC_RESULT = const(11)
_IRQ_GATTC_CHARACTERISTIC_DONE = const(12)
_IRQ_GATTC_READ_RESULT = const(15)
_IRQ_GATTC_READ_DONE = const(16)
_IRQ_GATTC_WRITE_DONE = const(17)
_IRQ_GATTC_NOTIFY = const(18)
SERVICE_UUID = bluetooth.UUID("00000001-1111-2222-3333-444444444444")
CHAR_CTRL_UUID = bluetooth.UUID("00000002-1111-2222-3333-444444444444")
CHAR_RX_UUID = bluetooth.UUID("00000003-1111-2222-3333-444444444444")
CHAR_TX_UUID = bluetooth.UUID("00000004-1111-2222-3333-444444444444")
CHAR_CTRL = (CHAR_CTRL_UUID, bluetooth.FLAG_WRITE | bluetooth.FLAG_NOTIFY)
CHAR_RX = (CHAR_RX_UUID, bluetooth.FLAG_WRITE | bluetooth.FLAG_WRITE_NO_RESPONSE)
CHAR_TX = (CHAR_TX_UUID, bluetooth.FLAG_NOTIFY)
SERVICE = (SERVICE_UUID, (CHAR_CTRL, CHAR_RX, CHAR_TX))
SERVICES = (SERVICE,)
waiting_event = None
waiting_data = None
ctrl_value_handle = 0
rx_value_handle = 0
tx_value_handle = 0
def irq(event, data):
global waiting_event, waiting_data, ctrl_value_handle, rx_value_handle, tx_value_handle
if event == _IRQ_CENTRAL_CONNECT:
print("_IRQ_CENTRAL_CONNECT")
elif event == _IRQ_CENTRAL_DISCONNECT:
print("_IRQ_CENTRAL_DISCONNECT")
elif event == _IRQ_GATTS_WRITE:
print("_IRQ_GATTS_WRITE")
elif event == _IRQ_PERIPHERAL_CONNECT:
print("_IRQ_PERIPHERAL_CONNECT")
elif event == _IRQ_PERIPHERAL_DISCONNECT:
print("_IRQ_PERIPHERAL_DISCONNECT")
elif event == _IRQ_GATTC_CHARACTERISTIC_RESULT:
if data[-1] == CHAR_CTRL_UUID:
print("_IRQ_GATTC_CHARACTERISTIC_RESULT", data[-1])
ctrl_value_handle = data[2]
elif data[-1] == CHAR_RX_UUID:
print("_IRQ_GATTC_CHARACTERISTIC_RESULT", data[-1])
rx_value_handle = data[2]
elif data[-1] == CHAR_TX_UUID:
print("_IRQ_GATTC_CHARACTERISTIC_RESULT", data[-1])
tx_value_handle = data[2]
elif event == _IRQ_GATTC_CHARACTERISTIC_DONE:
print("_IRQ_GATTC_CHARACTERISTIC_DONE")
elif event == _IRQ_GATTC_READ_RESULT:
print("_IRQ_GATTC_READ_RESULT", data[-1])
elif event == _IRQ_GATTC_READ_DONE:
print("_IRQ_GATTC_READ_DONE", data[-1])
elif event == _IRQ_GATTC_WRITE_DONE:
print("_IRQ_GATTC_WRITE_DONE", data[-1])
elif event == _IRQ_GATTC_NOTIFY:
print("_IRQ_GATTC_NOTIFY", bytes(data[-1]))
if waiting_event is not None:
if (isinstance(waiting_event, int) and event == waiting_event) or (
not isinstance(waiting_event, int) and waiting_event(event, data)
):
waiting_event = None
waiting_data = data
def wait_for_event(event, timeout_ms):
global waiting_event, waiting_data
waiting_event = event
waiting_data = None
t0 = time.ticks_ms()
while time.ticks_diff(time.ticks_ms(), t0) < timeout_ms:
if waiting_data:
return True
machine.idle()
return False
# Acting in peripheral role.
def instance0():
multitest.globals(BDADDR=ble.config("mac"))
((char_ctrl_handle, char_rx_handle, char_tx_handle),) = ble.gatts_register_services(SERVICES)
# Increase the size of the rx buffer and enable append mode.
ble.gatts_set_buffer(char_rx_handle, 100, True)
print("gap_advertise")
ble.gap_advertise(20_000, b"\x02\x01\x06\x04\xffMPY")
multitest.next()
try:
# Wait for central to connect to us.
if not wait_for_event(_IRQ_CENTRAL_CONNECT, TIMEOUT_MS):
return
conn_handle, _, _ = waiting_data
# Wait for the central to signal that it's done with its part of the test.
wait_for_event(
lambda event, data: event == _IRQ_GATTS_WRITE and data[1] == char_ctrl_handle,
2 * TIMEOUT_MS,
)
# Read all accumulated data from the central.
print("gatts_read:", ble.gatts_read(char_rx_handle))
# Notify the central a few times.
for i in range(4):
time.sleep_ms(300)
ble.gatts_notify(conn_handle, char_tx_handle, "message{}".format(i))
# Notify the central that we are done with our part of the test.
time.sleep_ms(300)
ble.gatts_notify(conn_handle, char_ctrl_handle, "OK")
# Wait for the central to disconnect.
wait_for_event(_IRQ_CENTRAL_DISCONNECT, TIMEOUT_MS)
finally:
ble.active(0)
# Acting in central role.
def instance1():
multitest.next()
try:
# Connect to peripheral and then disconnect.
print("gap_connect")
ble.gap_connect(*BDADDR)
if not wait_for_event(_IRQ_PERIPHERAL_CONNECT, TIMEOUT_MS):
return
conn_handle, _, _ = waiting_data
# Discover characteristics.
ble.gattc_discover_characteristics(conn_handle, 1, 65535)
wait_for_event(
lambda event, data: ctrl_value_handle and rx_value_handle and tx_value_handle,
TIMEOUT_MS,
)
wait_for_event(_IRQ_GATTC_CHARACTERISTIC_DONE, TIMEOUT_MS)
# Write to the characteristic a few times, with and without response.
for i in range(4):
print("gattc_write")
ble.gattc_write(conn_handle, rx_value_handle, "central{}".format(i), i & 1)
if i & 1:
wait_for_event(_IRQ_GATTC_WRITE_DONE, TIMEOUT_MS)
time.sleep_ms(400)
# Write to say that we are done with our part of the test.
ble.gattc_write(conn_handle, ctrl_value_handle, "OK", 1)
wait_for_event(_IRQ_GATTC_WRITE_DONE, TIMEOUT_MS)
# Wait for notification that peripheral is done with its part of the test.
wait_for_event(
lambda event, data: event == _IRQ_GATTC_NOTIFY and data[1] == ctrl_value_handle,
TIMEOUT_MS,
)
# Disconnect from peripheral.
print("gap_disconnect:", ble.gap_disconnect(conn_handle))
wait_for_event(_IRQ_PERIPHERAL_DISCONNECT, TIMEOUT_MS)
finally:
ble.active(0)
ble = bluetooth.BLE()
ble.active(1)
ble.irq(irq)
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