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chipmisc: Add support for configuring ad5206 digipots

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Support an "ad5206" config section so that one can configure the
digipots found on Reprap "RAMBo" boards.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2017-08-25 13:52:10 -04:00
parent 9d75c3b0ca
commit 931811ab59
4 changed files with 80 additions and 14 deletions
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27
klippy/chipmisc.py
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@ -32,6 +32,31 @@ class PrinterStaticPWM:
mcu_pwm.setup_static_pwm(value / scale)
######################################################################
# AD5206 digipot
######################################################################
class ad5206:
def __init__(self, printer, config):
enable_pin_params = pins.get_printer_pins(printer).parse_pin_desc(
config.get('enable_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))
######################################################################
# Setup
######################################################################
@ -41,3 +66,5 @@ def add_printer_objects(printer, config):
printer.add_object(s.section, PrinterStaticDigitalOut(printer, s))
for s in config.get_prefix_sections('static_pwm_output '):
printer.add_object(s.section, PrinterStaticPWM(printer, s))
for s in config.get_prefix_sections('ad5206 '):
printer.add_object(s.section, ad5206(printer, s))