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# AD5206 digipot code
#
# Copyright (C) 2017,2018 Kevin O'Connor <kevin@koconnor.net>
#
# This file may be distributed under the terms of the GNU GPLv3 license.
import pins
class ad5206:
def __init__(self, config):
printer = config.get_printer()
enable_pin_params = pins.get_printer_pins(printer).lookup_pin(
'digital_out', config.get('enable_pin'))
if enable_pin_params['invert']:
raise pins.error("ad5206 can not invert pin")
self.mcu = enable_pin_params['chip']
self.pin = enable_pin_params['pin']
self.mcu.add_config_object(self)
scale = config.getfloat('scale', 1., above=0.)
self.channels = [None] * 6
for i in range(len(self.channels)):
val = config.getfloat('channel_%d' % (i+1,), None,
minval=0., maxval=scale)
if val is not None:
self.channels[i] = int(val * 256. / scale + .5)
def build_config(self):
for i, val in enumerate(self.channels):
if val is not None:
self.mcu.add_config_cmd(
"send_spi_message pin=%s msg=%02x%02x" % (self.pin, i, val))
def load_config_prefix(config):
return ad5206(config)
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