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Tasmota/sonoff/xdsp_02_ssd1306.ino

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/*
xdsp_02_ssd1306.ino - Display Oled ssd1306 support for Sonoff-Tasmota
Copyright (C) 2018 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_SSD1306
#define XDSP_02 2
#define OLED_ADDRESS1 0x3C // Oled 128x32 I2C address
#define OLED_ADDRESS2 0x3D // Oled 128x64 I2C address
#define OLED_BUFFER_COLS 40 // Max number of columns in display shadow buffer
#define OLED_BUFFER_ROWS 8 // Max number of lines in display shadow buffer
#define OLED_FONT_WIDTH 6
#define OLED_FONT_HEIGTH 8
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
Adafruit_SSD1306 *oled;
char oled_screen_buffer[OLED_BUFFER_ROWS][OLED_BUFFER_COLS +1];
uint8_t ssd1306_font_x = OLED_FONT_WIDTH;
uint8_t ssd1306_font_y = OLED_FONT_HEIGTH;
void Ssd1306InitFull()
{
oled->invertDisplay(false);
oled->clearDisplay();
oled->setTextWrap(false); // Allow text to run off edges
oled->cp437(true);
oled->setTextSize(Settings.display_size);
oled->setTextColor(WHITE);
oled->setCursor(0,0);
oled->display();
}
void Ssd1306Clear()
{
oled->clearDisplay();
oled->setCursor(0, 0);
oled->display();
}
void Ssd1306DrawStringAt(uint16_t x, uint16_t y, char *str, uint16_t color, uint8_t flag)
{
if (!flag) {
oled->setCursor(x, y);
} else {
oled->setCursor((x-1) * ssd1306_font_x * Settings.display_size, (y-1) * ssd1306_font_y * Settings.display_size);
}
oled->println(str);
}
void Ssd1306DisplayOnOff(uint8_t on)
{
if (on) {
oled->ssd1306_command(SSD1306_DISPLAYON);
} else {
oled->ssd1306_command(SSD1306_DISPLAYOFF);
}
}
/*********************************************************************************************/
void Ssd1306InitMode()
{
oled->invertDisplay(false);
oled->clearDisplay();
oled->setTextWrap(false); // Allow text to run off edges
oled->cp437(true);
oled->setTextSize(Settings.display_size);
oled->setTextColor(WHITE);
oled->setCursor(0,0);
oled->display();
}
void Ssd1306Init(uint8_t mode)
{
switch(mode) {
case DISPLAY_INIT_MODE:
Ssd1306InitMode();
break;
case DISPLAY_INIT_PARTIAL:
case DISPLAY_INIT_FULL:
break;
}
}
void Ssd1306InitDriver()
{
if (!Settings.display_model) {
if (I2cDevice(OLED_ADDRESS1)) {
Settings.display_address[0] = OLED_ADDRESS1;
Settings.display_model = XDSP_02;
}
else if (I2cDevice(OLED_ADDRESS2)) {
Settings.display_address[0] = OLED_ADDRESS2;
Settings.display_model = XDSP_02;
}
}
if (XDSP_02 == Settings.display_model) {
oled = new Adafruit_SSD1306();
oled->begin(SSD1306_SWITCHCAPVCC, Settings.display_address[0]);
Ssd1306InitMode();
}
}
void Ssd1306PrintLogLine()
{
uint8_t last_row = Settings.display_rows -1;
oled->clearDisplay();
oled->setTextSize(Settings.display_size);
oled->setCursor(0,0);
for (byte i = 0; i < last_row; i++) {
strlcpy(oled_screen_buffer[i], oled_screen_buffer[i +1], sizeof(oled_screen_buffer[i]));
oled->println(oled_screen_buffer[i]);
}
char *pch = strchr(disp_log_buffer[disp_log_buffer_ptr],'~'); // = 0x7E (~) Replace degrees character (276 octal)
if (pch != NULL) {
disp_log_buffer[disp_log_buffer_ptr][pch - disp_log_buffer[disp_log_buffer_ptr]] = '\370'; // = 0xF8
}
strlcpy(oled_screen_buffer[last_row], disp_log_buffer[disp_log_buffer_ptr], sizeof(oled_screen_buffer[last_row]));
// Fill with spaces
byte len = sizeof(oled_screen_buffer[last_row]) - strlen(oled_screen_buffer[last_row]);
if (len) {
memset(oled_screen_buffer[last_row] + strlen(oled_screen_buffer[last_row]), 0x20, len);
oled_screen_buffer[last_row][sizeof(oled_screen_buffer[last_row])-1] = 0;
}
snprintf_P(log_data, sizeof(log_data), PSTR(D_LOG_DEBUG "[%s]"), oled_screen_buffer[last_row]);
AddLog(LOG_LEVEL_DEBUG);
oled->println(oled_screen_buffer[last_row]);
oled->display();
}
void Ssd1306PrintLog()
{
disp_refresh--;
if (!disp_refresh) {
disp_refresh = Settings.display_refresh;
disp_log_buffer_active = (disp_log_buffer_idx != disp_log_buffer_ptr);
if (disp_log_buffer_active) {
Ssd1306PrintLogLine();
DisplayLogBufferPtrInc();
}
}
}
void Ssd1306OnOff()
{
Ssd1306DisplayOnOff(disp_power);
oled->display();
}
void Ssd1306Time()
{
char line[12];
oled->clearDisplay();
oled->setTextSize(2);
oled->setCursor(0, 0);
snprintf_P(line, sizeof(line), PSTR(" %02d" D_HOUR_MINUTE_SEPARATOR "%02d" D_MINUTE_SECOND_SEPARATOR "%02d"), RtcTime.hour, RtcTime.minute, RtcTime.second); // [ 12:34:56 ]
oled->println(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); // [01-02-2018]
oled->println(line);
oled->display();
}
void Ssd1306Refresh() // Every second
{
if (Settings.display_mode) { // Mode 0 is User text
switch (Settings.display_mode) {
case 1: // Time
Ssd1306Time();
break;
case 2: // Local
case 3: // Local
case 4: // Mqtt
case 5: // Mqtt
Ssd1306PrintLog();
break;
}
}
}
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
boolean Xdsp02(byte function)
{
boolean result = false;
if (i2c_flg) {
if (FUNC_DISPLAY_INIT_DRIVER == function) {
Ssd1306InitDriver();
}
else if (XDSP_02 == Settings.display_model) {
if (!dsp_color) { dsp_color = WHITE; }
switch (function) {
case FUNC_DISPLAY_MODEL:
result = true;
break;
case FUNC_DISPLAY_INIT:
Ssd1306Init(dsp_init);
break;
case FUNC_DISPLAY_EVERY_SECOND:
Ssd1306Refresh();
break;
case FUNC_DISPLAY_POWER:
Ssd1306OnOff();
break;
case FUNC_DISPLAY_CLEAR:
Ssd1306Clear();
break;
case FUNC_DISPLAY_DRAW_HLINE:
oled->writeFastHLine(dsp_x, dsp_y, dsp_len, dsp_color);
break;
case FUNC_DISPLAY_DRAW_VLINE:
oled->writeFastVLine(dsp_x, dsp_y, dsp_len, dsp_color);
break;
case FUNC_DISPLAY_DRAW_LINE:
oled->writeLine(dsp_x, dsp_y, dsp_x2, dsp_y2, dsp_color);
break;
case FUNC_DISPLAY_DRAW_CIRCLE:
oled->drawCircle(dsp_x, dsp_y, dsp_rad, dsp_color);
break;
case FUNC_DISPLAY_FILL_CIRCLE:
oled->fillCircle(dsp_x, dsp_y, dsp_rad, dsp_color);
break;
case FUNC_DISPLAY_DRAW_RECTANGLE:
oled->drawRect(dsp_x, dsp_y, dsp_x2, dsp_y2, dsp_color);
break;
case FUNC_DISPLAY_FILL_RECTANGLE:
oled->fillRect(dsp_x, dsp_y, dsp_x2, dsp_y2, dsp_color);
break;
case FUNC_DISPLAY_DRAW_FRAME:
oled->display();
break;
case FUNC_DISPLAY_FONT_SIZE:
oled->setTextSize(Settings.display_size);
break;
case FUNC_DISPLAY_DRAW_STRING:
Ssd1306DrawStringAt(dsp_x, dsp_y, dsp_str, dsp_color, dsp_flag);
break;
case FUNC_DISPLAY_ONOFF:
Ssd1306DisplayOnOff(dsp_on);
break;
case FUNC_DISPLAY_ROTATION:
oled->setRotation(dsp_rotation);
break;
}
}
}
return result;
}
#endif // USE_DISPLAY_SSD1306
#endif // USE_DISPLAY
#endif // USE_I2C
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