Arduino style GUI
Drivers/SSD1351_SPI.cpp
- Committer:
- jonebuckman
- Date:
- 2016-05-06
- Revision:
- 0:90962b684403
File content as of revision 0:90962b684403:
/* NeatGUI Library * Copyright (c) 2013 Neil Thiessen * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "SSD1351_SPI.h" SSD1351_SPI::SSD1351_SPI(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName dc) : Display(128, 128), m_SPI(mosi, miso, sclk), m_CS(cs), m_DC(dc) { //Deselect the display m_CS = 1; //Set the SPI format to 8 bit data, high steady state clock, second edge capture m_SPI.format(8, 3); //Set the SPI frequency to 20MHz m_SPI.frequency(10000000); } bool SSD1351_SPI::open() { //Init sequence for 128x128 OLED module writeCommand(CMD_COMMANDLOCK); writeData(0x12); writeCommand(CMD_COMMANDLOCK); writeData(0xB1); writeCommand(CMD_DISPLAYOFF); writeCommand(CMD_CLOCKDIV); writeCommand(0xF1); writeCommand(CMD_MUXRATIO); writeData(127); writeCommand(CMD_SETREMAP); //writeData(0x74); writeData(0xB4); //writeData(0b01110100); writeCommand(CMD_SETCOLUMN); writeData(0x00); writeData(0x7F); writeCommand(CMD_SETROW); writeData(0x00); writeData(0x7F); writeCommand(CMD_STARTLINE); writeData(0x0); writeCommand(CMD_DISPLAYOFFSET); writeData(0x0); writeCommand(CMD_SETGPIO); writeData(0x00); writeCommand(CMD_FUNCTIONSELECT); writeData(0x01); writeCommand(CMD_PRECHARGE); writeCommand(0x32); writeCommand(CMD_VCOMH); writeCommand(0x05); writeCommand(CMD_NORMALDISPLAY); writeCommand(CMD_CONTRASTABC); writeData(0xC8); writeData(0x80); writeData(0xC8); writeCommand(CMD_CONTRASTMASTER); writeData(0x0F); writeCommand(CMD_SETVSL ); writeData(0xA0); writeData(0xB5); writeData(0x55); writeCommand(CMD_PRECHARGE2); writeData(0x01); //Return success return true; } void SSD1351_SPI::flush() { if (m_CacheIndex > 0) { //Set DC to data and select the display m_DC = 1; m_CS = 0; //Write the entire cache at once for (int i = 0; i < m_CacheIndex; i++) m_SPI.write(m_Cache[i]); //Deselect the display m_CS = 1; //Reset the cache index m_CacheIndex = 0; } } Display::State SSD1351_SPI::state() { //Return the base class's state return Display::state(); } void SSD1351_SPI::state(State s) { //Check what the requested state is if (s == Display::DISPLAY_ON) { //Turn the display on writeCommand(CMD_DISPLAYON); } else if (s == Display::DISPLAY_OFF) { //Turn the display off writeCommand(CMD_DISPLAYOFF); } //Update the base class Display::state(s); } void SSD1351_SPI::drawPixel(int x, int y, unsigned int c) { //Range check the pixel if ((x < 0) || (x >= width()) || (y < 0) || (y >= height())) return; //Only goto if the cursor is out of position if (x != m_CursX || y != m_CursY) { //First flush the cache flush(); //Set column start and end address (also moves pointer) writeCommand(CMD_SETCOLUMN); writeData(x); writeData(width() - 1); //Set row start and end address (also moves pointer) writeCommand(CMD_SETROW); writeData(y); writeData(height() - 1); writeCommand(CMD_WRITERAM); //Update the cursor variables m_StartX = x; m_StartY = y; m_CursX = x; m_CursY = y; } //Check if the cache is full if (m_CacheIndex > 1024 - 4) { //Flush the cache flush(); } //Add this pixel to the cache m_Cache[m_CacheIndex++] = c >> 18; m_Cache[m_CacheIndex++] = c >> 10; m_Cache[m_CacheIndex++] = c >> 2; //Increment the cursor with wrapping if (++m_CursX > width() - 1) { m_CursX = m_StartX; if (++m_CursY > height() - 1) { m_CursY = m_StartY; } } } void SSD1351_SPI::writeCommand(char command) { //Set DC to command and select the display m_DC = 0; m_CS = 0; //Write the command byte m_SPI.write(command); //Deselect the display m_CS = 1; } void SSD1351_SPI::writeData(char data) { //Set DC to data and select the display m_DC = 1; m_CS = 0; //Write the data byte m_SPI.write(data); //Deselect the display m_CS = 1; }