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127 lines
4.0 KiB
127 lines
4.0 KiB
/*
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* Marlin 3D Printer Firmware
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* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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/**
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* PCA9533 LED controller driver (MightyBoard, FlashForge Creator Pro, etc.)
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* by @grauerfuchs - 1 Apr 2020
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*/
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#include "../../inc/MarlinConfig.h"
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#if ENABLED(PCA9533)
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#include "pca9533.h"
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#include <Wire.h>
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void PCA9533_init() {
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Wire.begin();
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PCA9533_reset();
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}
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static void PCA9533_writeAllRegisters(uint8_t psc0, uint8_t pwm0, uint8_t psc1, uint8_t pwm1, uint8_t ls0){
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uint8_t data[6] = { PCA9533_REG_PSC0 | PCA9533_REGM_AI, psc0, pwm0, psc1, pwm1, ls0 };
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Wire.beginTransmission(PCA9533_Addr >> 1);
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Wire.write(data, 6);
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Wire.endTransmission();
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delayMicroseconds(1);
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}
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static void PCA9533_writeRegister(uint8_t reg, uint8_t val){
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uint8_t data[2] = { reg, val };
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Wire.beginTransmission(PCA9533_Addr >> 1);
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Wire.write(data, 2);
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Wire.endTransmission();
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delayMicroseconds(1);
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}
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// Reset (clear) all registers
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void PCA9533_reset() {
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PCA9533_writeAllRegisters(0, 0, 0, 0, 0);
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}
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// Turn all LEDs off
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void PCA9533_setOff() {
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PCA9533_writeRegister(PCA9533_REG_SEL, 0);
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}
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void PCA9533_set_rgb(uint8_t red, uint8_t green, uint8_t blue) {
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uint8_t r_pwm0 = 0; // Register data - PWM value
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uint8_t r_pwm1 = 0; // Register data - PWM value
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uint8_t op_g = 0, op_r = 0, op_b = 0; // Opcodes - Green, Red, Blue
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// Light theory! GREEN takes priority because
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// it's the most visible to the human eye.
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if (green == 0) op_g = PCA9533_LED_OP_OFF;
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else if (green == 255) op_g = PCA9533_LED_OP_ON;
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else { r_pwm0 = green; op_g = PCA9533_LED_OP_PWM0; }
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// RED
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if (red == 0) op_r = PCA9533_LED_OP_OFF;
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else if (red == 255) op_r = PCA9533_LED_OP_ON;
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else if (r_pwm0 == 0 || r_pwm0 == red) {
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r_pwm0 = red; op_r = PCA9533_LED_OP_PWM0;
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}
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else {
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r_pwm1 = red; op_r = PCA9533_LED_OP_PWM1;
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}
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// BLUE
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if (blue == 0) op_b = PCA9533_LED_OP_OFF;
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else if (blue == 255) op_b = PCA9533_LED_OP_ON;
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else if (r_pwm0 == 0 || r_pwm0 == blue) {
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r_pwm0 = blue; op_b = PCA9533_LED_OP_PWM0;
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}
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else if (r_pwm1 == 0 || r_pwm1 == blue) {
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r_pwm1 = blue; op_b = PCA9533_LED_OP_PWM1;
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}
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else {
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/**
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* Conflict. 3 values are requested but only 2 channels exist.
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* G is on channel 0 and R is on channel 1, so work from there.
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* Find the closest match, average the values, then use the free channel.
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*/
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uint8_t dgb = ABS(green - blue),
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dgr = ABS(green - red),
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dbr = ABS(blue - red);
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if (dgb < dgr && dgb < dbr) { // Mix with G on channel 0.
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op_b = PCA9533_LED_OP_PWM0;
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r_pwm0 = uint8_t(((uint16_t)green + (uint16_t)blue) / 2);
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}
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else if (dbr <= dgr && dbr <= dgb) { // Mix with R on channel 1.
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op_b = PCA9533_LED_OP_PWM1;
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r_pwm1 = uint8_t(((uint16_t)red + (uint16_t)blue) / 2);
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}
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else { // Mix R+G on 0 and put B on 1.
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op_r = PCA9533_LED_OP_PWM0;
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r_pwm0 = uint8_t(((uint16_t)green + (uint16_t)red) / 2);
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op_b = PCA9533_LED_OP_PWM1;
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r_pwm1 = blue;
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}
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}
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// Write the changes to the hardware
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PCA9533_writeAllRegisters(0, r_pwm0, 0, r_pwm1,
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(op_g << PCA9533_LED_OFS_GRN) | (op_r << PCA9533_LED_OFS_RED) | (op_b << PCA9533_LED_OFS_BLU)
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);
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}
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#endif // PCA9533
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