pca9632: LED module for FlashForge Dreamer 3D printer (#4654)

Added PCA9632 LED module support using software I2C from MCP4018
modulo drive the LED strip of a FlashForge Dreamer 3D printer.
Based on the PCA9533 module. 

Signed-off-by: Ricardo Alcantara <ricardo@vulcanolabs.xyz>

1 files changed, 91 insertions, 0 deletions

diff --git a/klippy/extras/pca9632.py b/klippy/extras/pca9632.py
new file mode 100644
index 00000000..a3f533da
--- /dev/null
+++ b/klippy/extras/pca9632.py
@@ -0,0 +1,91 @@
+# Support for the PCA9632 LED driver ic
+#
+# Copyright (C) 2022  Ricardo Alcantara <ricardo@vulcanolabs.com>
+#
+# This file may be distributed under the terms of the GNU GPLv3 license.
+from .mcp4018 import SoftwareI2C
+
+# Register addresses
+PCA9632_MODE1 = 0x00
+PCA9632_MODE2 = 0x01
+PCA9632_PWM0 = 0x02
+PCA9632_PWM1 = 0x03
+PCA9632_PWM2 = 0x04
+PCA9632_PWM3 = 0x05
+PCA9632_LEDOUT = 0x08
+
+LED_PWM = 0x02
+PCA9632_RED = 0x00
+PCA9632_GRN = 0x04
+PCA9632_BLU = 0x02
+PCA9632_WHT = 0x06
+
+class PCA9632:
+    def __init__(self, config):
+        self.printer = config.get_printer()
+
+        self.i2c = SoftwareI2C(config, 98)
+        #i2c_addr = self.i2c.get_i2c_address()
+
+        name = config.get_name().split()[1]
+        self.gcode = self.printer.lookup_object('gcode')
+        self.gcode.register_mux_command("SET_LED","LED",name,self.set_led,
+            desc="Set the color of an LED")
+
+        self.led_red = config.getfloat("initial_RED",0.,0.,1.)
+        self.led_green = config.getfloat("initial_GREEN",0.,0.,1.)
+        self.led_blue = config.getfloat("initial_BLUE",0.,0.,1.)
+        self.led_white = config.getfloat("initial_WHITE",0.,0.,1.)
+
+        config.get_printer().register_event_handler("klippy:connect",
+                                                    self.handle_connect)
+    def handle_connect(self):
+        self._init_PCA9632()
+    def _init_PCA9632(self):
+        #Configure MODE1
+        self.i2c.i2c_write([PCA9632_MODE1,0x00])
+
+        #Configure MODE2 (DIMMING, INVERT, CHANGE ON STOP,TOTEM)
+        self.i2c.i2c_write([PCA9632_MODE2,0x15])
+
+        self.led_red = int(self.led_red * 255.)
+        self.led_blue = int(self.led_blue * 255.)
+        self.led_green = int(self.led_green * 255.)
+        self.led_white = int(self.led_white * 255.)
+
+        self.i2c.i2c_write([PCA9632_PWM0,self.led_red])
+        self.i2c.i2c_write([PCA9632_PWM1,self.led_blue])
+        self.i2c.i2c_write([PCA9632_PWM2,self.led_green])
+        self.i2c.i2c_write([PCA9632_PWM3,self.led_white])
+
+        LEDOUT = (LED_PWM << PCA9632_RED if self.led_red else 0)
+        LEDOUT |= (LED_PWM << PCA9632_GRN if self.led_green else 0)
+        LEDOUT |= (LED_PWM << PCA9632_BLU if self.led_blue else 0)
+        LEDOUT |= (LED_PWM << PCA9632_WHT if self.led_white else 0)
+
+        self.i2c.i2c_write([PCA9632_LEDOUT,LEDOUT])
+    def set_led(self, gcmd):
+        self.led_red = gcmd.get_float("RED",self.led_red,0.,1.)
+        self.led_green = gcmd.get_float("GREEN",self.led_green,0.,1.)
+        self.led_blue = gcmd.get_float("BLUE",self.led_blue,0.,1.)
+        self.led_white = gcmd.get_float("WHITE",self.led_white,0.,1.)
+
+        self.led_red = int(self.led_red * 255.)
+        self.led_blue = int(self.led_blue * 255.)
+        self.led_green = int(self.led_green * 255.)
+        self.led_white = int(self.led_white * 255.)
+
+        self.i2c.i2c_write([PCA9632_PWM0,self.led_red])
+        self.i2c.i2c_write([PCA9632_PWM1,self.led_blue])
+        self.i2c.i2c_write([PCA9632_PWM2,self.led_green])
+        self.i2c.i2c_write([PCA9632_PWM3,self.led_white])
+
+        LEDOUT = (LED_PWM << PCA9632_RED if self.led_red else 0)
+        LEDOUT |= (LED_PWM << PCA9632_GRN if self.led_green else 0)
+        LEDOUT |= (LED_PWM << PCA9632_BLU if self.led_blue else 0)
+        LEDOUT |= (LED_PWM << PCA9632_WHT if self.led_white else 0)
+
+        self.i2c.i2c_write([PCA9632_LEDOUT,LEDOUT])
+
+def load_config_prefix(config):
+    return PCA9632(config)