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# Support for "dotstar" leds
#
# Copyright (C) 2019-2022 Kevin O'Connor <kevin@koconnor.net>
#
# This file may be distributed under the terms of the GNU GPLv3 license.
from . import bus
BACKGROUND_PRIORITY_CLOCK = 0x7fffffff00000000
class PrinterDotstar:
def __init__(self, config):
self.printer = printer = config.get_printer()
# Configure a software spi bus
ppins = printer.lookup_object('pins')
data_pin_params = ppins.lookup_pin(config.get('data_pin'))
clock_pin_params = ppins.lookup_pin(config.get('clock_pin'))
mcu = data_pin_params['chip']
if mcu is not clock_pin_params['chip']:
raise config.error("Dotstar pins must be on same mcu")
sw_spi_pins = (data_pin_params['pin'], data_pin_params['pin'],
clock_pin_params['pin'])
self.spi = bus.MCU_SPI(mcu, None, None, 0, 500000, sw_spi_pins)
# Initialize color data
self.chain_count = config.getint('chain_count', 1, minval=1)
pled = printer.load_object(config, "led")
self.led_helper = pled.setup_helper(config, self.update_leds,
self.chain_count)
self.prev_data = None
# Register commands
printer.register_event_handler("klippy:connect", self.handle_connect)
def handle_connect(self):
self.update_leds(self.led_helper.get_status()['color_data'], None)
def update_leds(self, led_state, print_time):
if led_state == self.prev_data:
return
self.prev_data = led_state
# Build data to send
data = [0] * ((len(led_state) + 2) * 4)
for i, (red, green, blue, white) in enumerate(led_state):
idx = (i + 1) * 4
data[idx] = 0xff
data[idx+1] = int(blue * 255. + .5)
data[idx+2] = int(green * 255. + .5)
data[idx+3] = int(red * 255. + .5)
data[-4] = data[-3] = data[-2] = data[-1] = 0xff
# Transmit update
minclock = 0
if print_time is not None:
minclock = self.spi.get_mcu().print_time_to_clock(print_time)
for d in [data[i:i+20] for i in range(0, len(data), 20)]:
self.spi.spi_send(d, minclock=minclock,
reqclock=BACKGROUND_PRIORITY_CLOCK)
def get_status(self, eventtime):
return self.led_helper.get_status(eventtime)
def load_config_prefix(config):
return PrinterDotstar(config)
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