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bus: Add MCU_bus_digital_out helper class

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Add a helper class for tracking gpio outputs that are synchronized to
bus updates on a particular command queue.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-08-17 21:46:45 -04:00
parent 9c40394248
commit 05bb5484b4
2 changed files with 47 additions and 24 deletions
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30
klippy/extras/display/uc1701.py
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@ -1,6 +1,6 @@
# Support for UC1701 (and similar) 128x64 graphics LCD displays
#
# Copyright (C) 2018 Kevin O'Connor <kevin@koconnor.net>
# Copyright (C) 2018-2019 Kevin O'Connor <kevin@koconnor.net>
# Copyright (C) 2018 Eric Callahan <arksine.code@gmail.com>
# Copyright (C) 2019 Dmitry Budaev <condemil@gmail.com>
#
@ -110,30 +110,12 @@ class SPI4wire:
def __init__(self, config, data_pin_name):
self.spi = extras.bus.MCU_SPI_from_config(config, 0,
default_speed=10000000)
mcu = self.spi.get_mcu()
# Create data/control pin
ppins = config.get_printer().lookup_object('pins')
pin_params = ppins.lookup_pin(config.get(data_pin_name))
if pin_params['chip'] != mcu:
raise ppins.error("%s: all pins must be on same mcu" % (
config.get_name()))
self.dc_oid = mcu.create_oid()
mcu.add_config_cmd("config_digital_out oid=%d pin=%s"
" value=%d default_value=%d max_duration=%d" % (
self.dc_oid, pin_params['pin'], 0, 0, 0))
mcu.register_config_callback(self.build_config)
self.update_pin_cmd = None
def build_config(self):
self.update_pin_cmd = self.spi.get_mcu().lookup_command(
"update_digital_out oid=%c value=%c",
cq=self.spi.get_command_queue())
dc_pin = config.get(data_pin_name)
self.mcu_dc = extras.bus.MCU_bus_digital_out(
self.spi.get_mcu(), dc_pin, self.spi.get_command_queue())
def send(self, cmds, is_data=False):
if is_data:
self.update_pin_cmd.send([self.dc_oid, 1],
reqclock=BACKGROUND_PRIORITY_CLOCK)
else:
self.update_pin_cmd.send([self.dc_oid, 0],
reqclock=BACKGROUND_PRIORITY_CLOCK)
self.mcu_dc.update_digital_out(is_data,
reqclock=BACKGROUND_PRIORITY_CLOCK)
self.spi.spi_send(cmds, reqclock=BACKGROUND_PRIORITY_CLOCK)
# IO wrapper for i2c bus