35 lines
1.3 KiB
Python
35 lines
1.3 KiB
Python
# AD5206 digipot code
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#
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# Copyright (C) 2017,2018 Kevin O'Connor <kevin@koconnor.net>
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#
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# This file may be distributed under the terms of the GNU GPLv3 license.
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class ad5206:
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def __init__(self, config):
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ppins = config.get_printer().lookup_object('pins')
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enable_pin = config.get('enable_pin')
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enable_pin_params = ppins.lookup_pin('digital_out', enable_pin)
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if enable_pin_params['invert']:
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raise ppins.error("ad5206 can not invert pin")
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mcu = enable_pin_params['chip']
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pin = enable_pin_params['pin']
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scale = config.getfloat('scale', 1., above=0.)
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channels = [None]*6
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for i in range(len(channels)):
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val = config.getfloat('channel_%d' % (i+1,), None,
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minval=0., maxval=scale)
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if val is not None:
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channels[i] = int(val * 256. / scale + .5)
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oid = mcu.create_oid()
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mcu.add_config_cmd(
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"config_spi oid=%d bus=%d pin=%s mode=%u rate=%u shutdown_msg=" % (
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oid, 0, pin, 0, 25000000))
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for i, val in enumerate(channels):
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if val is not None:
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mcu.add_config_cmd(
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"spi_send oid=%d data=%02x%02x" % (oid, i, val),
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is_init=True)
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def load_config_prefix(config):
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return ad5206(config)
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