forked from M-Labs/artiq
devices: add basic core device serial comms driver
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parent
29bd6e377d
commit
6b8ac5ae7b
35
artiq/devices/corecom_serial.py
Normal file
35
artiq/devices/corecom_serial.py
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import os
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import struct
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import termios
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class CoreCom:
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def __init__(self, dev="/dev/ttyUSB1", baud=115200):
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self._fd = os.open(dev, os.O_RDWR | os.O_NOCTTY)
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self.port = os.fdopen(self._fd, "r+b", buffering=0)
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iflag, oflag, cflag, lflag, ispeed, ospeed, cc = \
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termios.tcgetattr(self._fd)
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iflag = termios.IGNBRK | termios.IGNPAR
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oflag = 0
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cflag |= termios.CLOCAL | termios.CREAD | termios.CS8
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lflag = 0
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ispeed = ospeed = getattr(termios, "B"+str(baud))
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cc[termios.VMIN] = 1
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cc[termios.VTIME] = 0
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termios.tcsetattr(self._fd, termios.TCSANOW, [
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iflag, oflag, cflag, lflag, ispeed, ospeed, cc])
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termios.tcdrain(self._fd)
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termios.tcflush(self._fd, termios.TCOFLUSH)
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termios.tcflush(self._fd, termios.TCIFLUSH)
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def close(self):
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self.port.close()
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def __enter__(self):
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return self
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def __exit__(self, type, value, traceback):
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self.close()
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def run(self, kcode):
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self.port.write(struct.pack(">LL", 0x5a5a5a5a, len(kcode)))
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self.port.write(kcode)
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