153 lines
4.5 KiB
Python
153 lines
4.5 KiB
Python
# Send L2CAP data as fast as possible and time it.
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from micropython import const
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import time, machine, bluetooth, random
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if not hasattr(bluetooth.BLE, "l2cap_connect"):
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print("SKIP")
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raise SystemExit
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TIMEOUT_MS = 1000
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_IRQ_CENTRAL_CONNECT = const(1)
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_IRQ_CENTRAL_DISCONNECT = const(2)
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_IRQ_PERIPHERAL_CONNECT = const(7)
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_IRQ_PERIPHERAL_DISCONNECT = const(8)
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_IRQ_L2CAP_ACCEPT = const(22)
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_IRQ_L2CAP_CONNECT = const(23)
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_IRQ_L2CAP_DISCONNECT = const(24)
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_IRQ_L2CAP_RECV = const(25)
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_IRQ_L2CAP_SEND_READY = const(26)
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_L2CAP_PSM = const(22)
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_L2CAP_MTU = const(512)
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_PAYLOAD_LEN = const(_L2CAP_MTU)
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_NUM_PAYLOADS = const(20)
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_RANDOM_SEED = 22
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waiting_events = {}
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def irq(event, data):
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if event == _IRQ_CENTRAL_CONNECT:
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conn_handle, addr_type, addr = data
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waiting_events[event] = conn_handle
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elif event == _IRQ_PERIPHERAL_CONNECT:
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conn_handle, addr_type, addr = data
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waiting_events[event] = conn_handle
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elif event == _IRQ_L2CAP_ACCEPT:
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conn_handle, cid, psm, our_mtu, peer_mtu = data
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waiting_events[event] = (conn_handle, cid, psm)
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elif event == _IRQ_L2CAP_CONNECT:
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conn_handle, cid, psm, our_mtu, peer_mtu = data
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waiting_events[event] = (conn_handle, cid, psm, our_mtu, peer_mtu)
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if event not in waiting_events:
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waiting_events[event] = None
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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 event in waiting_events:
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return waiting_events.pop(event)
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machine.idle()
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raise ValueError("Timeout waiting for {}".format(event))
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def send_data(ble, conn_handle, cid):
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buf = bytearray(_PAYLOAD_LEN)
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for i in range(_NUM_PAYLOADS):
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for j in range(_PAYLOAD_LEN):
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buf[j] = random.randint(0, 255)
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if not ble.l2cap_send(conn_handle, cid, buf):
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wait_for_event(_IRQ_L2CAP_SEND_READY, TIMEOUT_MS)
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def recv_data(ble, conn_handle, cid):
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buf = bytearray(_PAYLOAD_LEN)
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recv_bytes = 0
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recv_correct = 0
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expected_bytes = _PAYLOAD_LEN * _NUM_PAYLOADS
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ticks_first_byte = 0
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while recv_bytes < expected_bytes:
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wait_for_event(_IRQ_L2CAP_RECV, TIMEOUT_MS)
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if not ticks_first_byte:
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ticks_first_byte = time.ticks_ms()
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while True:
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n = ble.l2cap_recvinto(conn_handle, cid, buf)
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if n == 0:
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break
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recv_bytes += n
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for i in range(n):
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if buf[i] == random.randint(0, 255):
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recv_correct += 1
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ticks_end = time.ticks_ms()
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return recv_bytes, recv_correct, time.ticks_diff(ticks_end, ticks_first_byte)
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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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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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# Wait for central to connect to us.
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conn_handle = wait_for_event(_IRQ_CENTRAL_CONNECT, TIMEOUT_MS)
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ble.l2cap_listen(_L2CAP_PSM, _L2CAP_MTU)
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conn_handle, cid, psm = wait_for_event(_IRQ_L2CAP_ACCEPT, TIMEOUT_MS)
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conn_handle, cid, psm, our_mtu, peer_mtu = wait_for_event(_IRQ_L2CAP_CONNECT, TIMEOUT_MS)
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random.seed(_RANDOM_SEED)
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send_data(ble, conn_handle, cid)
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wait_for_event(_IRQ_L2CAP_DISCONNECT, TIMEOUT_MS)
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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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ble.gap_connect(*BDADDR)
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conn_handle = wait_for_event(_IRQ_PERIPHERAL_CONNECT, TIMEOUT_MS)
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ble.l2cap_connect(conn_handle, _L2CAP_PSM, _L2CAP_MTU)
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conn_handle, cid, psm, our_mtu, peer_mtu = wait_for_event(_IRQ_L2CAP_CONNECT, TIMEOUT_MS)
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random.seed(_RANDOM_SEED)
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recv_bytes, recv_correct, total_ticks = recv_data(ble, conn_handle, cid)
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# Disconnect channel.
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ble.l2cap_disconnect(conn_handle, cid)
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wait_for_event(_IRQ_L2CAP_DISCONNECT, TIMEOUT_MS)
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multitest.output_metric(
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"Received {}/{} bytes in {} ms. {} B/s".format(
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recv_bytes, recv_correct, total_ticks, recv_bytes * 1000 // total_ticks
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)
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)
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# Disconnect from peripheral.
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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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