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spicmds: Allow inversion of CS pin for SPI busses

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Signed-off-by: Martin Hierholzer <martin@hierholzer.info>
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Martin Hierholzer 2021-09-25 11:52:31 +02:00 • committed by Kevin O'Connor
parent a02da85101
commit 7793784640
2 changed files with 21 additions and 16 deletions
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11
klippy/extras/bus.py
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@ -39,7 +39,8 @@ def resolve_bus_name(mcu, param, bus):
# Helper code for working with devices connected to an MCU via an SPI bus
class MCU_SPI:
def __init__(self, mcu, bus, pin, mode, speed, sw_pins=None):
def __init__(self, mcu, bus, pin, mode, speed, sw_pins=None,
cs_active_high=False):
self.mcu = mcu
self.bus = bus
# Config SPI object (set all CS pins high before spi_set_bus commands)
@ -47,7 +48,8 @@ class MCU_SPI:
if pin is None:
mcu.add_config_cmd("config_spi_without_cs oid=%d" % (self.oid,))
else:
mcu.add_config_cmd("config_spi oid=%d pin=%s" % (self.oid, pin))
mcu.add_config_cmd("config_spi oid=%d pin=%s cs_active_high=%d"
% (self.oid, pin, cs_active_high))
# Generate SPI bus config message
if sw_pins is not None:
self.config_fmt = (
@ -103,7 +105,8 @@ class MCU_SPI:
# Helper to setup an spi bus from settings in a config section
def MCU_SPI_from_config(config, mode, pin_option="cs_pin",
default_speed=100000, share_type=None):
default_speed=100000, share_type=None,
cs_active_high=False):
# Determine pin from config
ppins = config.get_printer().lookup_object("pins")
cs_pin = config.get(pin_option)
@ -130,7 +133,7 @@ def MCU_SPI_from_config(config, mode, pin_option="cs_pin",
bus = config.get('spi_bus', None)
sw_pins = None
# Create MCU_SPI object
return MCU_SPI(mcu, bus, pin, mode, speed, sw_pins)
return MCU_SPI(mcu, bus, pin, mode, speed, sw_pins, cs_active_high)
######################################################################