Tasmota/tasmota/xdsp_01_lcd.ino

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/*
xdsp_01_lcd.ino - Display LCD support for Tasmota
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Copyright (C) 2021 Theo Arends and Adafruit
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/>.
*/
#ifdef USE_I2C
#ifdef USE_DISPLAY
#ifdef USE_DISPLAY_LCD
#define XDSP_01 1
#define XI2C_03 3 // See I2CDEVICES.md
#define LCD_ADDRESS1 0x27 // LCD I2C address option 1
#define LCD_ADDRESS2 0x3F // LCD I2C address option 2
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C *lcd;
/*********************************************************************************************/
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void LcdInitMode(void)
{
lcd->init();
lcd->clear();
}
void LcdInit(uint8_t mode)
{
switch(mode) {
case DISPLAY_INIT_MODE:
LcdInitMode();
#ifdef USE_DISPLAY_MODES1TO5
DisplayClearScreenBuffer();
#endif // USE_DISPLAY_MODES1TO5
break;
case DISPLAY_INIT_PARTIAL:
case DISPLAY_INIT_FULL:
break;
}
}
void LcdInitDriver(void) {
if (!TasmotaGlobal.i2c_enabled) { return; }
if (!Settings.display_model) {
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if (I2cSetDevice(LCD_ADDRESS1)) {
Settings.display_address[0] = LCD_ADDRESS1;
Settings.display_model = XDSP_01;
}
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else if (I2cSetDevice(LCD_ADDRESS2)) {
Settings.display_address[0] = LCD_ADDRESS2;
Settings.display_model = XDSP_01;
}
}
if (XDSP_01 == Settings.display_model) {
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I2cSetActiveFound(Settings.display_address[0], "LCD");
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Settings.display_width = Settings.display_cols[0];
Settings.display_height = Settings.display_rows;
lcd = new LiquidCrystal_I2C(Settings.display_address[0], Settings.display_cols[0], Settings.display_rows);
#ifdef USE_DISPLAY_MODES1TO5
DisplayAllocScreenBuffer();
#endif // USE_DISPLAY_MODES1TO5
LcdInitMode();
}
}
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void LcdDrawStringAt(void)
{
if (dsp_flag) { // Supply Line and Column starting with Line 1 and Column 1
dsp_x--;
dsp_y--;
}
lcd->setCursor(dsp_x, dsp_y);
lcd->print(dsp_str);
}
void LcdDisplayOnOff()
{
if (disp_power) {
lcd->backlight();
} else {
lcd->noBacklight();
}
}
/*********************************************************************************************/
#ifdef USE_DISPLAY_MODES1TO5
void LcdCenter(uint8_t row, char* txt)
{
char line[Settings.display_cols[0] +2];
int len = strlen(txt);
int offset = 0;
if (len >= Settings.display_cols[0]) {
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len = Settings.display_cols[0];
} else {
offset = (Settings.display_cols[0] - len) / 2;
}
memset(line, 0x20, Settings.display_cols[0]);
line[Settings.display_cols[0]] = 0;
for (uint32_t i = 0; i < len; i++) {
line[offset +i] = txt[i];
}
lcd->setCursor(0, row);
lcd->print(line);
}
bool LcdPrintLog(void)
{
bool result = false;
disp_refresh--;
if (!disp_refresh) {
disp_refresh = Settings.display_refresh;
if (!disp_screen_buffer_cols) { DisplayAllocScreenBuffer(); }
char* txt = DisplayLogBuffer('\337');
if (txt != nullptr) {
uint8_t last_row = Settings.display_rows -1;
for (uint32_t i = 0; i < last_row; i++) {
strlcpy(disp_screen_buffer[i], disp_screen_buffer[i +1], disp_screen_buffer_cols);
lcd->setCursor(0, i); // Col 0, Row i
lcd->print(disp_screen_buffer[i +1]);
}
strlcpy(disp_screen_buffer[last_row], txt, disp_screen_buffer_cols);
DisplayFillScreen(last_row);
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AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_DEBUG "[%s]"), disp_screen_buffer[last_row]);
lcd->setCursor(0, last_row);
lcd->print(disp_screen_buffer[last_row]);
result = true;
}
}
return result;
}
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void LcdTime(void)
{
char line[Settings.display_cols[0] +1];
snprintf_P(line, sizeof(line), PSTR("%02d" D_HOUR_MINUTE_SEPARATOR "%02d" D_MINUTE_SECOND_SEPARATOR "%02d"), RtcTime.hour, RtcTime.minute, RtcTime.second);
LcdCenter(0, line);
snprintf_P(line, sizeof(line), PSTR("%02d" D_MONTH_DAY_SEPARATOR "%02d" D_YEAR_MONTH_SEPARATOR "%04d"), RtcTime.day_of_month, RtcTime.month, RtcTime.year);
LcdCenter(1, line);
}
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void LcdRefresh(void) // Every second
{
if (Settings.display_mode) { // Mode 0 is User text
switch (Settings.display_mode) {
case 1: // Time
LcdTime();
break;
case 2: // Local
case 4: // Mqtt
LcdPrintLog();
break;
case 3: // Local
case 5: { // Mqtt
if (!LcdPrintLog()) { LcdTime(); }
break;
}
}
}
}
#endif // USE_DISPLAY_MODES1TO5
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
bool Xdsp01(uint8_t function)
{
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if (!I2cEnabled(XI2C_03)) { return false; }
bool result = false;
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if (FUNC_DISPLAY_INIT_DRIVER == function) {
LcdInitDriver();
}
else if (XDSP_01 == Settings.display_model) {
switch (function) {
case FUNC_DISPLAY_MODEL:
result = true;
break;
case FUNC_DISPLAY_INIT:
LcdInit(dsp_init);
break;
case FUNC_DISPLAY_POWER:
LcdDisplayOnOff();
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break;
case FUNC_DISPLAY_CLEAR:
lcd->clear();
break;
// case FUNC_DISPLAY_DRAW_HLINE:
// break;
// case FUNC_DISPLAY_DRAW_VLINE:
// break;
// case FUNC_DISPLAY_DRAW_CIRCLE:
// break;
// case FUNC_DISPLAY_FILL_CIRCLE:
// break;
// case FUNC_DISPLAY_DRAW_RECTANGLE:
// break;
// case FUNC_DISPLAY_FILL_RECTANGLE:
// break;
// case FUNC_DISPLAY_DRAW_FRAME:
// break;
// case FUNC_DISPLAY_TEXT_SIZE:
// break;
// case FUNC_DISPLAY_FONT_SIZE:
// break;
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case FUNC_DISPLAY_DRAW_STRING:
LcdDrawStringAt();
break;
// case FUNC_DISPLAY_ROTATION:
// break;
#ifdef USE_DISPLAY_MODES1TO5
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case FUNC_DISPLAY_EVERY_SECOND:
LcdRefresh();
break;
#endif // USE_DISPLAY_MODES1TO5
}
}
return result;
}
#endif // USE_DISPLAY_LCD
#endif // USE_DISPLAY
#endif // USE_I2C