113 lines
5.0 KiB
Python
113 lines
5.0 KiB
Python
# Support for "neopixel" 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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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 = printer = config.get_printer()
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self.mutex = printer.get_reactor().mutex()
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# Configure neopixel
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ppins = 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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self.neopixel_update_cmd = self.neopixel_send_cmd = None
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# Build color map
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chain_count = config.getint('chain_count', 1, minval=1)
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color_order = config.getlist("color_order", ["GRB"])
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if len(color_order) == 1:
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color_order = [color_order[0]] * chain_count
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if len(color_order) != chain_count:
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raise config.error("color_order does not match chain_count")
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color_indexes = []
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for lidx, co in enumerate(color_order):
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if sorted(co) not in (sorted("RGB"), sorted("RGBW")):
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raise config.error("Invalid color_order '%s'" % (co,))
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color_indexes.extend([(lidx, "RGBW".index(c)) for c in co])
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self.color_map = list(enumerate(color_indexes))
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if len(self.color_map) > MAX_MCU_SIZE:
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raise config.error("neopixel chain too long")
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# Initialize color data
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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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chain_count)
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self.color_data = bytearray(len(self.color_map))
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self.update_color_data(self.led_helper.get_status()['color_data'])
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self.old_color_data = bytearray([d ^ 1 for d in self.color_data])
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# Register callbacks
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printer.register_event_handler("klippy:connect", self.send_data)
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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, led_state):
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color_data = self.color_data
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for cdidx, (lidx, cidx) in self.color_map:
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color_data[cdidx] = int(led_state[lidx][cidx] * 255. + .5)
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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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if self.printer.get_start_args().get('debugoutput') is not None:
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return
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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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def update_leds(self, led_state, print_time):
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def reactor_bgfunc(eventtime):
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with self.mutex:
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self.update_color_data(led_state)
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self.send_data(print_time)
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self.printer.get_reactor().register_callback(reactor_bgfunc)
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def get_status(self, eventtime=None):
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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 PrinterNeoPixel(config)
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