134 lines
6.0 KiB
Python
134 lines
6.0 KiB
Python
# Support for "neopixel" leds
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#
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# Copyright (C) 2019-2020 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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import logging
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BACKGROUND_PRIORITY_CLOCK = 0x7fffffff00000000
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BIT_MAX_TIME=.000004
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RESET_MIN_TIME=.000050
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MAX_MCU_SIZE = 500 # Sanity check on LED chain length
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class PrinterNeoPixel:
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def __init__(self, config):
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self.printer = config.get_printer()
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name = config.get_name().split()[1]
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self.mutex = self.printer.get_reactor().mutex()
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# Configure neopixel
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ppins = self.printer.lookup_object('pins')
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pin_params = ppins.lookup_pin(config.get('pin'))
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self.mcu = pin_params['chip']
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self.oid = self.mcu.create_oid()
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self.pin = pin_params['pin']
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self.mcu.register_config_callback(self.build_config)
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formats = {v: v for v in ["RGB", "GRB", "RGBW", "GRBW"]}
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self.color_order = config.getchoice("color_order", formats, "GRB")
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elem_size = len(self.color_order)
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self.chain_count = config.getint('chain_count', 1, minval=1,
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maxval=MAX_MCU_SIZE//elem_size)
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self.neopixel_update_cmd = self.neopixel_send_cmd = None
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# Initial color
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self.color_data = bytearray(self.chain_count * elem_size)
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red = config.getfloat('initial_RED', 0., minval=0., maxval=1.)
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green = config.getfloat('initial_GREEN', 0., minval=0., maxval=1.)
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blue = config.getfloat('initial_BLUE', 0., minval=0., maxval=1.)
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white = 0
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if elem_size == 4:
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white = config.getfloat('initial_WHITE', 0., minval=0., maxval=1.)
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self.update_color_data(red, green, blue, white)
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self.old_color_data = bytearray([d ^ 1 for d in self.color_data])
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# Register commands
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self.printer.register_event_handler("klippy:connect", self.send_data)
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gcode = self.printer.lookup_object('gcode')
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gcode.register_mux_command("SET_LED", "LED", name, self.cmd_SET_LED,
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desc=self.cmd_SET_LED_help)
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def build_config(self):
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bmt = self.mcu.seconds_to_clock(BIT_MAX_TIME)
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rmt = self.mcu.seconds_to_clock(RESET_MIN_TIME)
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self.mcu.add_config_cmd("config_neopixel oid=%d pin=%s data_size=%d"
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" bit_max_ticks=%d reset_min_ticks=%d"
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% (self.oid, self.pin, len(self.color_data),
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bmt, rmt))
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cmd_queue = self.mcu.alloc_command_queue()
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self.neopixel_update_cmd = self.mcu.lookup_command(
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"neopixel_update oid=%c pos=%hu data=%*s", cq=cmd_queue)
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self.neopixel_send_cmd = self.mcu.lookup_query_command(
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"neopixel_send oid=%c", "neopixel_result oid=%c success=%c",
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oid=self.oid, cq=cmd_queue)
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def update_color_data(self, red, green, blue, white, index=None):
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red = int(red * 255. + .5)
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blue = int(blue * 255. + .5)
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green = int(green * 255. + .5)
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white = int(white * 255. + .5)
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if self.color_order == "GRB":
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color_data = [green, red, blue]
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elif self.color_order == "RGB":
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color_data = [red, green, blue]
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elif self.color_order == "GRBW":
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color_data = [green, red, blue, white]
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else:
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color_data = [red, green, blue, white]
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if index is None:
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self.color_data[:] = color_data * self.chain_count
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else:
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elem_size = len(color_data)
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self.color_data[(index-1)*elem_size:index*elem_size] = color_data
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def send_data(self, print_time=None):
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old_data, new_data = self.old_color_data, self.color_data
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if new_data == old_data:
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return
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# Find the position of all changed bytes in this framebuffer
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diffs = [[i, 1] for i, (n, o) in enumerate(zip(new_data, old_data))
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if n != o]
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# Batch together changes that are close to each other
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for i in range(len(diffs)-2, -1, -1):
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pos, count = diffs[i]
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nextpos, nextcount = diffs[i+1]
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if pos + 5 >= nextpos and nextcount < 16:
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diffs[i][1] = nextcount + (nextpos - pos)
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del diffs[i+1]
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# Transmit changes
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ucmd = self.neopixel_update_cmd.send
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for pos, count in diffs:
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ucmd([self.oid, pos, new_data[pos:pos+count]],
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reqclock=BACKGROUND_PRIORITY_CLOCK)
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old_data[:] = new_data
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# Instruct mcu to update the LEDs
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minclock = 0
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if print_time is not None:
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minclock = self.mcu.print_time_to_clock(print_time)
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scmd = self.neopixel_send_cmd.send
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for i in range(8):
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params = scmd([self.oid], minclock=minclock,
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reqclock=BACKGROUND_PRIORITY_CLOCK)
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if params['success']:
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break
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else:
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logging.info("Neopixel update did not succeed")
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cmd_SET_LED_help = "Set the color of an LED"
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def cmd_SET_LED(self, gcmd):
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# Parse parameters
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red = gcmd.get_float('RED', 0., minval=0., maxval=1.)
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green = gcmd.get_float('GREEN', 0., minval=0., maxval=1.)
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blue = gcmd.get_float('BLUE', 0., minval=0., maxval=1.)
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white = gcmd.get_float('WHITE', 0., minval=0., maxval=1.)
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index = gcmd.get_int('INDEX', None, minval=1, maxval=self.chain_count)
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transmit = gcmd.get_int('TRANSMIT', 1)
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# Update and transmit data
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def reactor_bgfunc(print_time):
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with self.mutex:
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self.update_color_data(red, green, blue, white, index)
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if transmit:
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self.send_data(print_time)
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def lookahead_bgfunc(print_time):
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reactor = self.printer.get_reactor()
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reactor.register_callback(lambda et: reactor_bgfunc(print_time))
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toolhead = self.printer.lookup_object('toolhead')
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toolhead.register_lookahead_callback(lookahead_bgfunc)
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def load_config_prefix(config):
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return PrinterNeoPixel(config)
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