mirror of
https://github.com/Klipper3d/klipper.git
synced 2025-10-31 02:15:52 +01:00
f931da1b87
Use alternate import syntax to improve Python3 compatibility. Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
24 lines
850 B
Python
24 lines
850 B
Python
# MCP4728 dac code
|
|
#
|
|
# Copyright (C) 2018 Kevin O'Connor <kevin@koconnor.net>
|
|
#
|
|
# This file may be distributed under the terms of the GNU GPLv3 license.
|
|
from . import bus
|
|
|
|
class mcp4728:
|
|
def __init__(self, config):
|
|
self.i2c = bus.MCU_I2C_from_config(config, default_addr=0x60)
|
|
scale = config.getfloat('scale', 1., above=0.)
|
|
# Configure registers
|
|
for i, name in enumerate('abcd'):
|
|
val = config.getfloat('channel_%s' % (name,), None,
|
|
minval=0., maxval=scale)
|
|
if val is not None:
|
|
self.set_dac(i, int(val * 4095. / scale + .5))
|
|
def set_dac(self, dac, value):
|
|
self.i2c.i2c_write([0x40 | (dac << 1),
|
|
((value >> 8) & 0x0f) | 0x80, value & 0xff])
|
|
|
|
def load_config_prefix(config):
|
|
return mcp4728(config)
|