58 lines
2.1 KiB
Python
58 lines
2.1 KiB
Python
"""
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The MIT License (MIT)
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Copyright (c) 2015 Richard Hull
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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"""
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import smbus2 as smbus
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class Device(object):
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"""
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Base class for OLED driver classes
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"""
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def __init__(self, port=1, address=0x3C, cmd_mode=0x00, data_mode=0x40):
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self.cmd_mode = cmd_mode
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self.data_mode = data_mode
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self.bus = smbus.SMBus(port)
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self.addr = address
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def command(self, *cmd):
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"""
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Sends a command or sequence of commands through to the
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device - maximum allowed is 32 bytes in one go.
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"""
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assert(len(cmd) <= 32)
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self.bus.write_i2c_block_data(self.addr, self.cmd_mode, list(cmd))
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def data(self, data):
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"""
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Sends a data byte or sequence of data bytes through to the
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device - maximum allowed in one transaction is 32 bytes, so if
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data is larger than this it is sent in chunks.
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"""
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for i in range(0, len(data), 32):
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self.bus.write_i2c_block_data(self.addr,
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self.data_mode,
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list(data[i:i+32]))
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