mirror of https://github.com/arendst/Tasmota.git
121 lines
3.8 KiB
C++
121 lines
3.8 KiB
C++
/*
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xdrv_26_sm2135.ino - sm2135 I2C five channel led support for Sonoff-Tasmota
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Copyright (C) 2019 Theo Arends
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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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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef USE_LIGHT
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#ifdef USE_SM2135
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/*********************************************************************************************\
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* SM2135 I2C RGBCW Led bulbs like Action LSC SmartLed
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\*********************************************************************************************/
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#define XDRV_26 26
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#define SM2135_ADDR 0x40 // 0x40 .. 0x46
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//#define SM2135_CURRENT 0x24 // Defaults: 20mA for RGB, 30mA for CW
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#define SM2135_CURRENT 0x16 // 3 x 15mA for RGB, 2 x 40mA/2 for CW
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#define SM2135_RGB 0x00
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#define SM2135_CW 0x80
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struct SM2135 {
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bool found = true;
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} Sm2135;
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bool Sm2135SetChannels(void)
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{
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char *buffer = XdrvMailbox.data;
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// AddLog_P2(LOG_LEVEL_DEBUG, PSTR("SM1: R %d G %d B %d, C %d W %d"), buffer[0], buffer[1], buffer[2], buffer[3], buffer[4]);
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if (('\0' == buffer[0]) && ('\0' == buffer[1]) && ('\0' == buffer[2])) {
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// No color so must be Cold/Warm
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if ((buffer[3] + buffer[4]) >= (1 * 256)) {
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// Scale down to 255 total to fix max power usage of 9W (=40mA)
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// Currently not needed with setting 2 x 40mA/2 = 40mA = 9W = 255 (handled by lights.ino)
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buffer[3] >>= 1; // Divide by 2
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buffer[4] >>= 1; // Divide by 2
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}
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Wire.beginTransmission(SM2135_ADDR);
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Wire.write(SM2135_CURRENT); // Set current to 40mA
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Wire.write(SM2135_CW); // Select CW - Shutdown RGB?
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Wire.endTransmission();
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delay(1);
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Wire.beginTransmission(SM2135_ADDR +5);
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Wire.write(buffer[3]); // Cold
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Wire.write(buffer[4]); // Warm
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Wire.endTransmission();
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} else {
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// Color
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if ((buffer[0] + buffer[1] + buffer[2]) >= (3 * 256)) {
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// Scale down to 765 total to fix max power usage of 9W
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// Currently not needed with setting 3 x 15mA = 45mA = 11W = 765
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}
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Wire.beginTransmission(SM2135_ADDR);
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Wire.write(SM2135_CURRENT); // Set current to 15mA
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Wire.write(SM2135_RGB); // Select RGB - Shutdown CW?
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Wire.write(buffer[0]); // Red
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Wire.write(buffer[1]); // Green
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Wire.write(buffer[2]); // Blue
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Wire.endTransmission();
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}
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return true;
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}
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bool Sm2135ModuleSelected(void)
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{
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if (I2cDevice(SM2135_ADDR)) {
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// Make sure it is the SM2135 chip as it's address is also used by HTU21, INA219, INA226
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// EXPERIMENTAL: Need further testing
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light_type = LT_RGBWC;
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AddLog_P2(LOG_LEVEL_DEBUG, S_LOG_I2C_FOUND_AT, "SM2135", SM2135_ADDR);
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} else {
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Sm2135.found = false;
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}
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return Sm2135.found;
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}
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/*********************************************************************************************\
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* Interface
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\*********************************************************************************************/
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bool Xdrv26(uint8_t function)
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{
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bool result = false;
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if (i2c_flg && Sm2135.found) {
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switch (function) {
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case FUNC_SET_CHANNELS:
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result = Sm2135SetChannels();
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break;
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case FUNC_MODULE_INIT:
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result = Sm2135ModuleSelected();
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break;
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}
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}
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return result;
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}
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#endif // USE_SM2135
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#endif // USE_LIGHT
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