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