Touch events are sent on special interface now.pull/25/head
parent
3677b8142b
commit
421f17bfee
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import ustruct
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from . import msg
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from . import loop
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IFACE = const(0)
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REPORT_LEN = const(64)
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REPORT_NUM = const(63)
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HEADER_MAGIC = const(35) #
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def read_report():
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_, rep = yield loop.Select(IFACE)
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assert rep[0] == REPORT_NUM, 'Report number malformed'
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return rep
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def write_report(rep):
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size = msg.send(IFACE, rep)
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assert size == REPORT_LEN, 'HID write failed'
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def read_wire_msg():
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rep = yield from read_report()
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assert rep[1] == HEADER_MAGIC
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assert rep[2] == HEADER_MAGIC
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(mtype, mlen) = ustruct.unpack_from('>HL', rep, 3)
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# TODO: validate mlen for sane values
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rep = memoryview(rep)
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data = rep[9:]
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data = data[:mlen]
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mbuf = bytearray(data) # TODO: allocate mlen bytes
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remaining = mlen - len(mbuf)
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while remaining > 0:
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rep = yield from read_report()
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rep = memoryview(rep)
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data = rep[1:]
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data = data[:remaining]
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mbuf.extend(data)
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remaining -= len(data)
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return (mtype, mbuf)
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def write_wire_msg(mtype, mbuf):
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rep = bytearray(REPORT_LEN)
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rep[0] = REPORT_NUM
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rep[1] = HEADER_MAGIC
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rep[2] = HEADER_MAGIC
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ustruct.pack_into('>HL', rep, 3, mtype, len(mbuf))
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rep = memoryview(rep)
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mbuf = memoryview(mbuf)
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data = rep[9:]
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while mbuf:
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n = min(len(data), len(mbuf))
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data[:n] = mbuf[:n]
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i = n
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while i < len(data):
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data[i] = 0
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i += 1
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write_report(rep)
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mbuf = mbuf[n:]
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data = rep[1:]
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def read_msg(*types):
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mtype, mbuf = yield from read_wire_msg()
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for t in types:
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if t.wire_type == mtype:
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return t.loads(mbuf)
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else:
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raise Exception('Unexpected message')
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def write_msg(m):
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mbuf = m.dumps()
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mtype = m.message_type.wire_type
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write_wire_msg(mtype, mbuf)
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def call(req, *types):
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write_msg(req)
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res = yield from read_msg(*types)
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return res
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