mirror of
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142 lines
4.3 KiB
C++
142 lines
4.3 KiB
C++
/**
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* The MIT License (MIT)
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*
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* Copyright (c) 2018 by ThingPulse, Daniel Eichhorn
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* Copyright (c) 2018 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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* ThingPulse invests considerable time and money to develop these open source libraries.
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* Please support us by buying our products (and not the clones) from
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* https://thingpulse.com
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*
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*/
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#ifndef SH1106Brzo_h
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#define SH1106Brzo_h
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#include "OLEDDisplay.h"
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#include <brzo_i2c.h>
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#if F_CPU == 160000000L
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#define BRZO_I2C_SPEED 1000
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#else
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#define BRZO_I2C_SPEED 800
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#endif
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class SH1106Brzo : 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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SH1106Brzo(uint8_t _address, uint8_t _sda, uint8_t _scl, OLEDDISPLAY_GEOMETRY g = GEOMETRY_128_64) {
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setGeometry(g);
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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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brzo_i2c_setup(_sda, _scl, 0);
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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 = UINT8_MAX;
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uint8_t maxBoundY = 0;
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uint8_t minBoundX = UINT8_MAX;
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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 < (displayHeight / 8); y++) {
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for (x = 0; x < displayWidth; x++) {
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uint16_t pos = x + y * displayWidth;
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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 == UINT8_MAX) return;
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byte k = 0;
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uint8_t sendBuffer[17];
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sendBuffer[0] = 0x40;
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// Calculate the colum offset
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uint8_t minBoundXp2H = (minBoundX + 2) & 0x0F;
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uint8_t minBoundXp2L = 0x10 | ((minBoundX + 2) >> 4 );
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brzo_i2c_start_transaction(this->_address, BRZO_I2C_SPEED);
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for (y = minBoundY; y <= maxBoundY; y++) {
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sendCommand(0xB0 + y);
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sendCommand(minBoundXp2H);
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sendCommand(minBoundXp2L);
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for (x = minBoundX; x <= maxBoundX; x++) {
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k++;
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sendBuffer[k] = buffer[x + y * displayWidth];
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if (k == 16) {
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brzo_i2c_write(sendBuffer, 17, true);
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k = 0;
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}
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}
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if (k != 0) {
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brzo_i2c_write(sendBuffer, k + 1, true);
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k = 0;
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}
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yield();
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}
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if (k != 0) {
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brzo_i2c_write(sendBuffer, k + 1, true);
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}
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brzo_i2c_end_transaction();
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#else
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#endif
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}
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private:
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int getBufferOffset(void) {
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return 0;
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}
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inline void sendCommand(uint8_t com) __attribute__((always_inline)){
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uint8_t command[2] = {0x80 /* command mode */, com};
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brzo_i2c_start_transaction(_address, BRZO_I2C_SPEED);
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brzo_i2c_write(command, 2, true);
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brzo_i2c_end_transaction();
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}
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};
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#endif
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