164 lines
5.3 KiB
Python
164 lines
5.3 KiB
Python
# Test characteristic read/write/notify from both GATTS and GATTC.
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from micropython import const
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import time, machine, bluetooth
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TIMEOUT_MS = 5000
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_IRQ_CENTRAL_CONNECT = const(1 << 0)
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_IRQ_CENTRAL_DISCONNECT = const(1 << 1)
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_IRQ_GATTS_WRITE = const(1 << 2)
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_IRQ_PERIPHERAL_CONNECT = const(1 << 6)
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_IRQ_PERIPHERAL_DISCONNECT = const(1 << 7)
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_IRQ_GATTC_CHARACTERISTIC_RESULT = const(1 << 9)
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_IRQ_GATTC_READ_RESULT = const(1 << 11)
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_IRQ_GATTC_WRITE_STATUS = const(1 << 12)
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_IRQ_GATTC_NOTIFY = const(1 << 13)
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SERVICE_UUID = bluetooth.UUID("A5A5A5A5-FFFF-9999-1111-5A5A5A5A5A5A")
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CHAR_UUID = bluetooth.UUID("00000000-1111-2222-3333-444444444444")
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CHAR = (
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CHAR_UUID,
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bluetooth.FLAG_READ | bluetooth.FLAG_WRITE | bluetooth.FLAG_NOTIFY,
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)
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SERVICE = (
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SERVICE_UUID,
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(CHAR,),
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)
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SERVICES = (SERVICE,)
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last_event = None
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last_data = None
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value_handle = 0
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def irq(event, data):
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global last_event, last_data, value_handle
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last_event = event
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last_data = data
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if event == _IRQ_CENTRAL_CONNECT:
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print("_IRQ_CENTRAL_CONNECT")
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elif event == _IRQ_CENTRAL_DISCONNECT:
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print("_IRQ_CENTRAL_DISCONNECT")
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elif event == _IRQ_GATTS_WRITE:
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print("_IRQ_GATTS_WRITE", ble.gatts_read(data[-1]))
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elif event == _IRQ_PERIPHERAL_CONNECT:
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print("_IRQ_PERIPHERAL_CONNECT")
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elif event == _IRQ_PERIPHERAL_DISCONNECT:
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print("_IRQ_PERIPHERAL_DISCONNECT")
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elif event == _IRQ_GATTC_CHARACTERISTIC_RESULT:
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# conn_handle, def_handle, value_handle, properties, uuid = data
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if data[-1] == CHAR_UUID:
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print("_IRQ_GATTC_CHARACTERISTIC_RESULT", data[-1])
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value_handle = data[2]
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elif event == _IRQ_GATTC_READ_RESULT:
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print("_IRQ_GATTC_READ_RESULT", data[-1])
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elif event == _IRQ_GATTC_WRITE_STATUS:
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print("_IRQ_GATTC_WRITE_STATUS", data[-1])
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elif event == _IRQ_GATTC_NOTIFY:
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print("_IRQ_GATTC_NOTIFY", data[-1])
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def wait_for_event(event, timeout_ms):
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t0 = time.ticks_ms()
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while time.ticks_diff(time.ticks_ms(), t0) < timeout_ms:
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if isinstance(event, int):
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if last_event == event:
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break
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elif event():
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break
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machine.idle()
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# Acting in peripheral role.
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def instance0():
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multitest.globals(BDADDR=ble.config("mac"))
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((char_handle,),) = ble.gatts_register_services(SERVICES)
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print("gap_advertise")
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ble.gap_advertise(20_000, b"\x02\x01\x06\x04\xffMPY")
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multitest.next()
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try:
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# Write initial characteristic value.
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ble.gatts_write(char_handle, "periph0")
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# Wait for central to connect to us.
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wait_for_event(_IRQ_CENTRAL_CONNECT, TIMEOUT_MS)
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if last_event != _IRQ_CENTRAL_CONNECT:
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return
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conn_handle, _, _ = last_data
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# Wait for a write to the characteristic from the central.
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wait_for_event(_IRQ_GATTS_WRITE, TIMEOUT_MS)
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# Wait a bit, then write the characteristic and notify it.
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time.sleep_ms(1000)
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ble.gatts_write(char_handle, "periph1")
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ble.gatts_notify(conn_handle, char_handle)
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# Wait for a write to the characteristic from the central.
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wait_for_event(_IRQ_GATTS_WRITE, TIMEOUT_MS)
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# Wait a bit, then notify a new value on the characteristic.
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time.sleep_ms(1000)
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ble.gatts_notify(conn_handle, char_handle, "periph2")
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# Wait for the central to disconnect.
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wait_for_event(_IRQ_CENTRAL_DISCONNECT, TIMEOUT_MS)
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finally:
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ble.active(0)
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# Acting in central role.
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def instance1():
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multitest.next()
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try:
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# Connect to peripheral and then disconnect.
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print("gap_connect")
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ble.gap_connect(0, BDADDR)
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wait_for_event(_IRQ_PERIPHERAL_CONNECT, TIMEOUT_MS)
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if last_event != _IRQ_PERIPHERAL_CONNECT:
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return
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conn_handle, _, _ = last_data
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# Discover characteristics.
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ble.gattc_discover_characteristics(conn_handle, 1, 65535)
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wait_for_event(lambda: value_handle, TIMEOUT_MS)
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# Issue read of characteristic, should get initial value.
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print("gattc_read")
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ble.gattc_read(conn_handle, value_handle)
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wait_for_event(_IRQ_GATTC_READ_RESULT, TIMEOUT_MS)
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# Write to the characteristic, and ask for a response.
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print("gattc_write")
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ble.gattc_write(conn_handle, value_handle, "central0", 1)
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wait_for_event(_IRQ_GATTC_WRITE_STATUS, TIMEOUT_MS)
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# Wait for a notify, then read new value.
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wait_for_event(_IRQ_GATTC_NOTIFY, TIMEOUT_MS)
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print("gattc_read")
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ble.gattc_read(conn_handle, value_handle)
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wait_for_event(_IRQ_GATTC_READ_RESULT, TIMEOUT_MS)
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# Write to the characteristic, and ask for a response.
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print("gattc_write")
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ble.gattc_write(conn_handle, value_handle, "central1", 1)
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wait_for_event(_IRQ_GATTC_WRITE_STATUS, TIMEOUT_MS)
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# Wait for a notify (should have new data), then read old value (should be unchanged).
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wait_for_event(_IRQ_GATTC_NOTIFY, TIMEOUT_MS)
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print("gattc_read")
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ble.gattc_read(conn_handle, value_handle)
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wait_for_event(_IRQ_GATTC_READ_RESULT, TIMEOUT_MS)
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# Disconnect from peripheral.
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print("gap_disconnect:", ble.gap_disconnect(conn_handle))
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wait_for_event(_IRQ_PERIPHERAL_DISCONNECT, TIMEOUT_MS)
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finally:
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ble.active(0)
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ble = bluetooth.BLE()
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ble.active(1)
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ble.irq(irq)
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