1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
# 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.
class ad5206:
def __init__(self, config):
ppins = config.get_printer().lookup_object('pins')
enable_pin = config.get('enable_pin')
enable_pin_params = ppins.lookup_pin(enable_pin)
mcu = enable_pin_params['chip']
pin = enable_pin_params['pin']
scale = config.getfloat('scale', 1., above=0.)
channels = [None]*6
for i in range(len(channels)):
val = config.getfloat('channel_%d' % (i+1,), None,
minval=0., maxval=scale)
if val is not None:
channels[i] = int(val * 256. / scale + .5)
oid = mcu.create_oid()
mcu.add_config_cmd(
"config_spi oid=%d bus=%d pin=%s mode=%u rate=%u shutdown_msg=" % (
oid, 0, pin, 0, 25000000))
for i, val in enumerate(channels):
if val is not None:
mcu.add_config_cmd(
"spi_send oid=%d data=%02x%02x" % (oid, i, val),
is_init=True)
def load_config_prefix(config):
return ad5206(config)
|
