1 files changed, 61 insertions, 0 deletions
diff --git a/klippy/extras/dotstar.py b/klippy/extras/dotstar.py
new file mode 100644
index 00000000..51730fb4
--- /dev/null
+++ b/klippy/extras/dotstar.py
@@ -0,0 +1,61 @@
+# Support for "dotstar" leds
+#
+# Copyright (C) 2019  Kevin O'Connor <kevin@koconnor.net>
+#
+# This file may be distributed under the terms of the GNU GPLv3 license.
+import bus
+
+class PrinterDotstar:
+    def __init__(self, config):
+        self.printer = config.get_printer()
+        name = config.get_name().split()[1]
+        # Configure a software spi bus
+        ppins = self.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)
+        # Initial color
+        self.chain_count = config.getint('chain_count', 1, minval=1, maxval=12)
+        red = config.getfloat('initial_RED', 0., minval=0., maxval=1.)
+        green = config.getfloat('initial_GREEN', 0., minval=0., maxval=1.)
+        blue = config.getfloat('initial_BLUE', 0., minval=0., maxval=1.)
+        red = int(red * 255. + .5)
+        blue = int(blue * 255. + .5)
+        green = int(green * 255. + .5)
+        color_data = [0xff, blue, green, red] * self.chain_count
+        self.color_data = [0, 0, 0, 0] + color_data + [0xff, 0xff, 0xff, 0xff]
+        self.printer.register_event_handler("klippy:connect", self.send_data)
+        # Register commands
+        self.gcode = self.printer.lookup_object('gcode')
+        self.gcode.register_mux_command("SET_LED", "LED", name,
+                                        self.cmd_SET_LED,
+                                        desc=self.cmd_SET_LED_help)
+    def send_data(self, minclock=0):
+        self.spi.spi_send(self.color_data, minclock=minclock, reqclock=minclock)
+    cmd_SET_LED_help = "Set the color of an LED"
+    def cmd_SET_LED(self, params):
+        # Parse parameters
+        red = self.gcode.get_float('RED', params, 0., minval=0., maxval=1.)
+        green = self.gcode.get_float('GREEN', params, 0., minval=0., maxval=1.)
+        blue = self.gcode.get_float('BLUE', params, 0., minval=0., maxval=1.)
+        red = int(red * 255. + .5)
+        blue = int(blue * 255. + .5)
+        green = int(green * 255. + .5)
+        color_data = [0xff, blue, green, red]
+        if 'INDEX' in params:
+            index = self.gcode.get_int('INDEX', params,
+                                       minval=1, maxval=self.chain_count)
+            self.color_data[index*4:(index+1)*4] = color_data
+        else:
+            self.color_data[4:-4] = color_data * self.chain_count
+        # Send command
+        print_time = self.printer.lookup_object('toolhead').get_last_move_time()
+        self.send_data(self.spi.get_mcu().print_time_to_clock(print_time))
+
+def load_config_prefix(config):
+    return PrinterDotstar(config)