Fix / optimize PCA9533 LED (Mightyboard) (#17381)

Marlin/src/feature/leds/pca9533.h

@@ -0,0 +1,59 @@
+/*
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+/*
+ * Driver for the PCA9533 LED controller found on the MightyBoard
+ * used by FlashForge Creator Pro, MakerBot, etc.
+ * Written 2020 APR 01 by grauerfuchs
+ */
+#include <Arduino.h>
+
+#define ENABLE_I2C_PULLUPS
+
+// Chip address (for Wire)
+#define PCA9533_Addr        0xC4 
+
+// Control registers
+#define PCA9533_REG_READ    0x00
+#define PCA9533_REG_PSC0    0x01
+#define PCA9533_REG_PWM0    0x02
+#define PCA9533_REG_PSC1    0x03
+#define PCA9533_REG_PWM1    0x04
+#define PCA9533_REG_SEL     0x05
+#define PCA9533_REGM_AI     0x10
+
+// LED selector operation
+#define PCA9533_LED_OP_OFF  0B00
+#define PCA9533_LED_OP_ON   0B01
+#define PCA9533_LED_OP_PWM0 0B10
+#define PCA9533_LED_OP_PWM1 0B11
+
+// Select register bit offsets for LED colors
+#define PCA9533_LED_OFS_RED 0
+#define PCA9533_LED_OFS_GRN 2
+#define PCA9533_LED_OFS_BLU 4
+
+void PCA9533_init();
+void PCA9533_reset();
+void PCA9533_setColor(uint8_t red, uint8_t green, uint8_t blue);
+void PCA9533_setOff();