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i2c_software: Implementation of software i2c (#6141)

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Signed-off-by: Alan.Ma from BigTreeTech <tech@biqu3d.com>
This commit is contained in:
BIGTREETECH
2023-06-08 08:55:46 +08:00
committed by GitHub
parent b389c70d5a
commit 645a1b8364
8 changed files with 299 additions and 17 deletions
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36
klippy/extras/bus.py
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@@ -142,13 +142,22 @@ def MCU_SPI_from_config(config, mode, pin_option="cs_pin",
# Helper code for working with devices connected to an MCU via an I2C bus
class MCU_I2C:
def __init__(self, mcu, bus, addr, speed):
def __init__(self, mcu, bus, addr, speed, sw_pins=None):
self.mcu = mcu
self.bus = bus
self.i2c_address = addr
self.oid = self.mcu.create_oid()
self.config_fmt = "config_i2c oid=%d i2c_bus=%%s rate=%d address=%d" % (
self.oid, speed, addr)
mcu.add_config_cmd("config_i2c oid=%d" % (self.oid,))
# Generate I2C bus config message
if sw_pins is not None:
self.config_fmt = (
"i2c_set_software_bus oid=%d"
" scl_pin=%s sda_pin=%s rate=%d address=%d"
% (self.oid, sw_pins[0], sw_pins[1], speed, addr))
else:
self.config_fmt = (
"i2c_set_bus oid=%d i2c_bus=%%s rate=%d address=%d"
% (self.oid, speed, addr))
self.cmd_queue = self.mcu.alloc_command_queue()
self.mcu.register_config_callback(self.build_config)
self.i2c_write_cmd = self.i2c_read_cmd = self.i2c_modify_bits_cmd = None
@@ -161,8 +170,10 @@ class MCU_I2C:
def get_command_queue(self):
return self.cmd_queue
def build_config(self):
bus = resolve_bus_name(self.mcu, "i2c_bus", self.bus)
self.mcu.add_config_cmd(self.config_fmt % (bus,))
if '%' in self.config_fmt:
bus = resolve_bus_name(self.mcu, "i2c_bus", self.bus)
self.config_fmt = self.config_fmt % (bus,)
self.mcu.add_config_cmd(self.config_fmt)
self.i2c_write_cmd = self.mcu.lookup_command(
"i2c_write oid=%c data=%*s", cq=self.cmd_queue)
self.i2c_read_cmd = self.mcu.lookup_query_command(
@@ -202,13 +213,24 @@ def MCU_I2C_from_config(config, default_addr=None, default_speed=100000):
printer = config.get_printer()
i2c_mcu = mcu.get_printer_mcu(printer, config.get('i2c_mcu', 'mcu'))
speed = config.getint('i2c_speed', default_speed, minval=100000)
bus = config.get('i2c_bus', None)
if default_addr is None:
addr = config.getint('i2c_address', minval=0, maxval=127)
else:
addr = config.getint('i2c_address', default_addr, minval=0, maxval=127)
# Determine pin from config
ppins = config.get_printer().lookup_object("pins")
if config.get('i2c_software_scl_pin', None) is not None:
sw_pin_names = ['i2c_software_%s_pin' % (name,)
for name in ['scl', 'sda']]
sw_pin_params = [ppins.lookup_pin(config.get(name), share_type=name)
for name in sw_pin_names]
sw_pins = tuple([pin_params['pin'] for pin_params in sw_pin_params])
bus = None
else:
bus = config.get('i2c_bus', None)
sw_pins = None
# Create MCU_I2C object
return MCU_I2C(i2c_mcu, bus, addr, speed)
return MCU_I2C(i2c_mcu, bus, addr, speed, sw_pins)
######################################################################