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313 lines
10 KiB
C++
313 lines
10 KiB
C++
/*
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* Author: Marc Graham <marc@m2ag.net>
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* Copyright (c) 2015 Intel Corporation
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*
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* Adapted from ssd1308 library.
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* Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
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* Copyright (c) 2014 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all 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,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <string>
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#include <unistd.h>
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#include <syslog.h>
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#include "hd44780_bits.hpp"
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#include "ssd1306.hpp"
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using namespace upm;
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SSD1306::SSD1306(int bus_in, int addr_in) : m_i2c_lcd_control(bus_in)
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{
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int vccstate = SSD1306_SWITCHCAPVCC;
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_vccstate = vccstate;
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int LCD_CMD = 0x00;
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m_lcd_control_address = addr_in;
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m_name = "SSD1306";
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mraa::Result error = m_i2c_lcd_control.address(m_lcd_control_address);
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if (error != mraa::SUCCESS) {
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throw std::runtime_error(std::string(__FUNCTION__) +
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": mraa_i2c_address() failed");
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return;
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}
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error = m_i2c_lcd_control.frequency(mraa::I2C_FAST);
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if (error != mraa::SUCCESS) {
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syslog(LOG_WARNING, "%s: mraa_i2c_frequency(MRAA_I2C_FAST) failed, using default speed", std::string(__FUNCTION__).c_str());
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}
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m_i2c_lcd_control.writeReg(LCD_CMD, DISPLAY_CMD_OFF); // display off
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usleep(4500);
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//ADD 1306 stuff
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// Init sequence for 128x64 OLED module // 0xAE
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_SETDISPLAYCLOCKDIV); // 0xD5
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x80); // the suggested ratio 0x80
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_SETMULTIPLEX); // 0xA8
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x3F);
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_SETDISPLAYOFFSET); // 0xD3
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x0); // no offset
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_SETSTARTLINE | 0x0); // line #0
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_CHARGEPUMP); // 0x8D
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if (vccstate == SSD1306_EXTERNALVCC) {
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x10);
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} else {
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m_i2c_lcd_control.writeReg(LCD_CMD,0x14);
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}
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_MEMORYMODE); // 0x20
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x00); // 0x0 act like ks0108
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_SEGREMAP | 0x1);
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_COMSCANDEC);
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_SETCOMPINS); // 0xDA
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x12);
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_SETCONTRAST); // 0x81
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if (vccstate == SSD1306_EXTERNALVCC) {
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x9F);
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} else {
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m_i2c_lcd_control.writeReg(LCD_CMD, 0xCF);
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}
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_SETPRECHARGE); // 0xd9
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if (vccstate == SSD1306_EXTERNALVCC) {
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x22);
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} else {
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m_i2c_lcd_control.writeReg(LCD_CMD,0xF1);
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}
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_SETVCOMDETECT); // 0xDB
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x40);
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_DISPLAYALLON_RESUME); // 0xA4
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m_i2c_lcd_control.writeReg(LCD_CMD, DISPLAY_CMD_SET_NORMAL_1306); // 0xA6
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//END 1306 Stuff
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m_i2c_lcd_control.writeReg(LCD_CMD, DISPLAY_CMD_ON); // display on
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usleep(4500);
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setNormalDisplay(); // set to normal display '1' is ON
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clear();
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setAddressingMode(PAGE);
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}
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SSD1306::~SSD1306()
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{
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}
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mraa::Result
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SSD1306::draw(uint8_t* data, int bytes)
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{
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mraa::Result error = mraa::SUCCESS;
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setAddressingMode(HORIZONTAL);
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for (int idx = 0; idx < bytes; idx++) {
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m_i2c_lcd_control.writeReg(LCD_DATA, data[idx]);
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}
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return error;
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}
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/*
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* **************
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* virtual area
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* **************
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*/
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mraa::Result
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SSD1306::write(std::string msg)
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{
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mraa::Result error = mraa::SUCCESS;
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setAddressingMode(PAGE);
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for (std::string::size_type i = 0; i < msg.size(); ++i) {
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writeChar(msg[i]);
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}
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return error;
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}
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mraa::Result
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SSD1306::setCursor(int row, int column)
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{
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mraa::Result error = mraa::SUCCESS;
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error = m_i2c_lcd_control.writeReg(LCD_CMD, BASE_PAGE_START_ADDR + row); // set page address
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error = m_i2c_lcd_control.writeReg(LCD_CMD,
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BASE_LOW_COLUMN_ADDR + (8 * column & 0x0F)); // set column
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// lower address
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error = m_i2c_lcd_control.writeReg(LCD_CMD,
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BASE_HIGH_COLUMN_ADDR +
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((8 * column >> 4) & 0x0F)); // set column higher address
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return error;
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}
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mraa::Result
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SSD1306::clear()
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{
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mraa::Result error = mraa::SUCCESS;
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uint8_t columnIdx, rowIdx;
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m_i2c_lcd_control.writeReg(LCD_CMD, DISPLAY_CMD_OFF); // display off
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for (rowIdx = 0; rowIdx < 8; rowIdx++) {
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setCursor(rowIdx, 0);
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// clear all columns
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for (columnIdx = 0; columnIdx < 16; columnIdx++) {
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writeChar(' ');
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}
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}
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m_i2c_lcd_control.writeReg(LCD_CMD, DISPLAY_CMD_ON); // display on
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home();
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return error;
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}
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mraa::Result
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SSD1306::home()
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{
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return setCursor(0, 0);
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}
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/*
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* **************
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* private area
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* **************
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*/
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mraa::Result
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SSD1306::writeChar(uint8_t value)
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{
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mraa::Result rv;
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if (value < 0x20 || value > 0x7F) {
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value = 0x20; // space
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}
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for (uint8_t idx = 0; idx < 8; idx++) {
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rv = m_i2c_lcd_control.writeReg(LCD_DATA, BasicFont[value - 32][idx]);
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}
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return rv;
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}
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mraa::Result
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SSD1306::setNormalDisplay()
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{
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return m_i2c_lcd_control.writeReg(LCD_CMD,
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DISPLAY_CMD_SET_NORMAL_1306); // set to normal display '1' is
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// ON
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}
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mraa::Result
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SSD1306::setAddressingMode(displayAddressingMode mode)
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{
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mraa::Result rv;
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rv =m_i2c_lcd_control.writeReg(LCD_CMD, DISPLAY_CMD_MEM_ADDR_MODE); // set addressing mode
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rv =m_i2c_lcd_control.writeReg(LCD_CMD, mode); // set page addressing mode
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return rv;
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}
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mraa::Result
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SSD1306::invert(bool i)
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{
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mraa::Result rv;
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if(i){
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rv = m_i2c_lcd_control.writeReg(LCD_CMD, DISPLAY_CMD_SET_INVERT_1306);
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} else {
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rv = m_i2c_lcd_control.writeReg(LCD_CMD, DISPLAY_CMD_SET_NORMAL_1306);
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}
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return rv;
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}
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void SSD1306::startscrollright(uint8_t start, uint8_t stop){
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m_i2c_lcd_control.writeReg(LCD_CMD,SSD1306_RIGHT_HORIZONTAL_SCROLL);
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m_i2c_lcd_control.writeReg(LCD_CMD,0X00);
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m_i2c_lcd_control.writeReg(LCD_CMD,start);
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m_i2c_lcd_control.writeReg(LCD_CMD,0X00);
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m_i2c_lcd_control.writeReg(LCD_CMD,stop);
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m_i2c_lcd_control.writeReg(LCD_CMD,0X00);
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m_i2c_lcd_control.writeReg(LCD_CMD,0XFF);
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m_i2c_lcd_control.writeReg(LCD_CMD,SSD1306_ACTIVATE_SCROLL);
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}
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void SSD1306::startscrollleft(uint8_t start, uint8_t stop){
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m_i2c_lcd_control.writeReg(LCD_CMD,SSD1306_LEFT_HORIZONTAL_SCROLL);
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m_i2c_lcd_control.writeReg(LCD_CMD,0X00);
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m_i2c_lcd_control.writeReg(LCD_CMD,start);
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m_i2c_lcd_control.writeReg(LCD_CMD,0X00);
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m_i2c_lcd_control.writeReg(LCD_CMD,stop);
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m_i2c_lcd_control.writeReg(LCD_CMD,0X00);
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m_i2c_lcd_control.writeReg(LCD_CMD,0XFF);
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m_i2c_lcd_control.writeReg(LCD_CMD,SSD1306_ACTIVATE_SCROLL);
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}
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void SSD1306::startscrolldiagright(uint8_t start, uint8_t stop){
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_SET_VERTICAL_SCROLL_AREA);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0X00);
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_LCDHEIGHT);
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0X00);
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m_i2c_lcd_control.writeReg(LCD_CMD, start);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0X00);
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m_i2c_lcd_control.writeReg(LCD_CMD, stop);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0X01);
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_ACTIVATE_SCROLL);
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}
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void SSD1306::startscrolldiagleft(uint8_t start, uint8_t stop){
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_SET_VERTICAL_SCROLL_AREA);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0X00);
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_LCDHEIGHT);
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_VERTICAL_AND_LEFT_HORIZONTAL_SCROLL);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0X00);
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m_i2c_lcd_control.writeReg(LCD_CMD, start);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0X00);
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m_i2c_lcd_control.writeReg(LCD_CMD, stop);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0X01);
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m_i2c_lcd_control.writeReg(LCD_CMD, SSD1306_ACTIVATE_SCROLL);
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}
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void SSD1306::stopscroll(void){
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m_i2c_lcd_control.writeReg(LCD_CMD,SSD1306_DEACTIVATE_SCROLL);
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}
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// Dim the display
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// dim = true: display is dimmed
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// dim = false: display is normal
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void SSD1306::dim(bool dim) {
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uint8_t contrast;
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if (dim) {
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contrast = 0; // Dimmed display
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} else {
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if (_vccstate == SSD1306_EXTERNALVCC) {
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contrast = 0x9F;
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} else {
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contrast = 0xCF;
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}
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}
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// the range of contrast to too small to be really useful
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// it is useful to dim the display
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m_i2c_lcd_control.writeReg(LCD_CMD,SSD1306_SETCONTRAST);
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m_i2c_lcd_control.writeReg(LCD_CMD,contrast);
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}
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