128 line
2.9 KiB
C++
128 line
2.9 KiB
C++
#pragma once
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#include "DisplayDriver.h"
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#include <U8g2lib.h>
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#include <Wire.h>
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#ifndef DISPLAY_ADDRESS
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#define DISPLAY_ADDRESS 0x3C
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#endif
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#ifndef OLED_WIDTH
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#define OLED_WIDTH 72
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#endif
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#ifndef OLED_HEIGHT
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#define OLED_HEIGHT 40
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#endif
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class U8g2Display : public DisplayDriver {
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// U8g2 constructor for SSD1306/SSD1315 72×40 panel — handles all
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// GDDRAM column/page offsets, SETMULTIPLEX, SETDISPLAYOFFSET internally
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U8G2_SSD1306_72X40_ER_F_HW_I2C _u8g2;
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bool _isOn;
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uint8_t _drawColor;
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// Font metrics for current font (cached on setTextSize)
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uint8_t _fontAscent;
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uint8_t _fontHeight;
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void applyFont(int sz) {
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if (sz >= 2) {
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_u8g2.setFont(u8g2_font_5x7_mr); // 5×7 — "large" for this display
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} else {
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_u8g2.setFont(u8g2_font_5x7_mr);
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}
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_fontAscent = _u8g2.getAscent();
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_fontHeight = _u8g2.getAscent() - _u8g2.getDescent();
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}
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public:
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U8g2Display() : DisplayDriver(OLED_WIDTH, OLED_HEIGHT),
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_u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE),
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_isOn(false), _drawColor(1), _fontAscent(5), _fontHeight(6) {}
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bool begin() {
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// Wire must already be initialised by board.begin() before this is called
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bool ok = _u8g2.begin();
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if (ok) {
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_u8g2.setI2CAddress(DISPLAY_ADDRESS * 2); // U8g2 uses 8-bit address
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_u8g2.setFontPosTop(); // y coordinate = top of text, not baseline
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_u8g2.setFontMode(1); // transparent background
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applyFont(1); // default to compact font
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_isOn = true;
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}
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return ok;
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}
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bool isOn() override { return _isOn; }
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void turnOn() override {
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_u8g2.setPowerSave(0);
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_isOn = true;
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}
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void turnOff() override {
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_u8g2.setPowerSave(1);
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_isOn = false;
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}
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void clear() override {
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_u8g2.clearBuffer();
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_u8g2.sendBuffer();
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}
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void startFrame(Color bkg = DARK) override {
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_u8g2.clearBuffer();
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_drawColor = 1;
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_u8g2.setDrawColor(1);
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applyFont(1);
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}
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void setTextSize(int sz) override {
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applyFont(sz);
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}
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void setColor(Color c) override {
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_drawColor = (c != DARK) ? 1 : 0;
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_u8g2.setDrawColor(_drawColor);
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}
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void setCursor(int x, int y) override {
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_cursorX = x;
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_cursorY = y;
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}
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void print(const char* str) override {
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_u8g2.setDrawColor(_drawColor);
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_u8g2.drawStr(_cursorX, _cursorY, str);
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}
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void fillRect(int x, int y, int w, int h) override {
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_u8g2.setDrawColor(_drawColor);
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_u8g2.drawBox(x, y, w, h);
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}
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void drawRect(int x, int y, int w, int h) override {
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_u8g2.setDrawColor(_drawColor);
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_u8g2.drawFrame(x, y, w, h);
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}
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void drawXbm(int x, int y, const uint8_t* bits, int w, int h) override {
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_u8g2.setDrawColor(1);
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_u8g2.drawXBM(x, y, w, h, bits);
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}
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uint16_t getTextWidth(const char* str) override {
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return _u8g2.getStrWidth(str);
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}
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void endFrame() override {
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_u8g2.sendBuffer();
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}
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private:
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int _cursorX = 0;
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int _cursorY = 0;
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};
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