148 wiersze
4.3 KiB
C++
148 wiersze
4.3 KiB
C++
/**
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* The MIT License (MIT)
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*
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* Copyright (c) 2016 by Daniel Eichhorn
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* Copyright (c) 2016 by Fabrice Weinberg
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Credits for parts of this code go to Mike Rankin. Thank you so much for sharing!
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*/
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#ifndef SSD1306Wire_h
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#define SSD1306Wire_h
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#include "OLEDDisplay.h"
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#include <Wire.h>
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class SSD1306Wire : public OLEDDisplay {
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private:
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uint8_t _address;
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uint8_t _sda;
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uint8_t _scl;
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public:
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SSD1306Wire(uint8_t _address, uint8_t _sda, uint8_t _scl) {
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this->_address = _address;
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this->_sda = _sda;
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this->_scl = _scl;
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}
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bool connect() {
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Wire.begin(this->_sda, this->_scl);
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// Let's use ~700khz if ESP8266 is in 160Mhz mode
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// this will be limited to ~400khz if the ESP8266 in 80Mhz mode.
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Wire.setClock(700000);
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return true;
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}
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void display(void) {
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#ifdef OLEDDISPLAY_DOUBLE_BUFFER
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uint8_t minBoundY = ~0;
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uint8_t maxBoundY = 0;
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uint8_t minBoundX = ~0;
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uint8_t maxBoundX = 0;
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uint8_t x, y;
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// Calculate the Y bounding box of changes
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// and copy buffer[pos] to buffer_back[pos];
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for (y = 0; y < (DISPLAY_HEIGHT / 8); y++) {
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for (x = 0; x < DISPLAY_WIDTH; x++) {
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uint16_t pos = x + y * DISPLAY_WIDTH;
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if (buffer[pos] != buffer_back[pos]) {
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minBoundY = _min(minBoundY, y);
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maxBoundY = _max(maxBoundY, y);
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minBoundX = _min(minBoundX, x);
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maxBoundX = _max(maxBoundX, x);
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}
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buffer_back[pos] = buffer[pos];
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}
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yield();
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}
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// If the minBoundY wasn't updated
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// we can savely assume that buffer_back[pos] == buffer[pos]
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// holdes true for all values of pos
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if (minBoundY == ~0) return;
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sendCommand(COLUMNADDR);
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sendCommand(minBoundX);
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sendCommand(maxBoundX);
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sendCommand(PAGEADDR);
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sendCommand(minBoundY);
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sendCommand(maxBoundY);
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byte k = 0;
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for (y = minBoundY; y <= maxBoundY; y++) {
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for (x = minBoundX; x <= maxBoundX; x++) {
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if (k == 0) {
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Wire.beginTransmission(_address);
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Wire.write(0x40);
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}
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Wire.write(buffer[x + y * DISPLAY_WIDTH]);
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k++;
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if (k == 16) {
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Wire.endTransmission();
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k = 0;
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}
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}
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yield();
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}
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if (k != 0) {
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Wire.endTransmission();
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}
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#else
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sendCommand(COLUMNADDR);
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sendCommand(0x0);
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sendCommand(0x7F);
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sendCommand(PAGEADDR);
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sendCommand(0x0);
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sendCommand(0x7);
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for (uint16_t i=0; i < DISPLAY_BUFFER_SIZE; i++) {
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Wire.beginTransmission(this->_address);
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Wire.write(0x40);
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for (uint8_t x = 0; x < 16; x++) {
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Wire.write(buffer[i]);
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i++;
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}
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i--;
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Wire.endTransmission();
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}
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#endif
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}
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private:
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inline void sendCommand(uint8_t command) __attribute__((always_inline)){
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Wire.beginTransmission(_address);
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Wire.write(0x80);
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Wire.write(command);
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Wire.endTransmission();
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}
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};
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#endif
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