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31c4f470fe
Rewrite the i2c module to be based around the MRAA C++ API,
since this makes resource management easier inside of the UPM
C++ classes.
i2clcd.{h,cxx}: remove the close() function. This now automatically gets
called when the object goes out of scope, inside the destructor.
examples/i2clcd: fix C++/Python/Javascript examples that explicitly called the close function.
The I2c context now gets called by the destructor of the sensor class. This
happens when the object goes out of scope or when it gets deleted, if the
object was created using the new keyword, as is the case here.
Signed-off-by: Wouter van Verre <wouter.van.verre@intel.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
301 lines
9.8 KiB
C++
301 lines
9.8 KiB
C++
/*
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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 "ssd1327.h"
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using namespace upm;
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#define INIT_SLEEP 50000
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#define CMD_SLEEP 10000
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SSD1327::SSD1327(int bus_in, int addr_in) : I2CLcd(bus_in, addr_in)
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{
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mraa_result_t error = MRAA_SUCCESS;
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usleep(INIT_SLEEP);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0xFD); // Unlock OLED driver IC MCU
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// interface from entering command.
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// i.e: Accept commands
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usleep(INIT_SLEEP);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x12);
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0xAE); // Set display off
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usleep(INIT_SLEEP);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0xA8); // set multiplex ratio
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x5F); // 96
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0xA1); // set display start line
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x00); //
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0xA2); // set display offset
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x60);
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0xA0); // set remap
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x46);
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0xAB); // set vdd internal
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x01); //
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x81); // set contrasr
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x53); // 100 nit
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0xB1); // Set Phase Length
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0X51); //
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0xB3); // Set Display Clock Divide Ratio/Oscillator
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// Frequency
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x01); //
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0xB9); //
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0xBC); // set pre_charge
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// voltage/VCOMH
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x08); // (0x08);
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0xBE); // set VCOMH
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0X07); // (0x07);
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0xB6); // Set second pre-charge
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// period
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x01); //
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0xD5); // enable second precharge and enternal vsl
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0X62); // (0x62);
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0xA4); // Set Normal Display Mode
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x2E); // Deactivate Scroll
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0xAF); // Switch on display
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usleep(INIT_SLEEP);
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// Row Address
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x75); // Set Row Address
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x00); // Start 0
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x5f); // End 95
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usleep(INIT_SLEEP);
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// Column Address
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x15); // Set Column Address
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x08); // Start from 8th Column of
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// driver IC. This is 0th
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// Column for OLED
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usleep(INIT_SLEEP);
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error = m_i2c_lcd_control.writeReg(LCD_CMD, 0x37); // End at (8 + 47)th
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// column. Each Column has 2
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// pixels(segments)
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usleep(INIT_SLEEP);
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clear();
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setNormalDisplay();
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setVerticalMode();
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}
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SSD1327::~SSD1327()
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{
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}
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mraa_result_t
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SSD1327::draw(uint8_t* data, int bytes)
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{
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mraa_result_t error = MRAA_SUCCESS;
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setHorizontalMode();
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for (int row = 0; row < bytes; row++) {
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for (uint8_t col = 0; col < 8; col += 2) {
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uint8_t value = 0x0;
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uint8_t bitOne = (data[row] << col) & 0x80;
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uint8_t bitTwo = (data[row] << (col + 1)) & 0x80;
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value |= (bitOne) ? grayHigh : 0x00;
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value |= (bitTwo) ? grayLow : 0x00;
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m_i2c_lcd_control.writeReg(LCD_DATA, value);
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usleep(CMD_SLEEP - 2000);
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}
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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_t
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SSD1327::write(std::string msg)
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{
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mraa_result_t error = MRAA_SUCCESS;
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setVerticalMode();
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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_t
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SSD1327::setCursor(int row, int column)
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{
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mraa_result_t error = MRAA_SUCCESS;
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// Column Address
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x15); /* Set Column Address */
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usleep(CMD_SLEEP);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x08 + (column * 4)); /* Start Column:
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Start from 8 */
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usleep(CMD_SLEEP);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x37); /* End Column */
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usleep(CMD_SLEEP);
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// Row Address
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x75); /* Set Row Address */
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usleep(CMD_SLEEP);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x00 + (row * 8)); /* Start Row*/
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usleep(CMD_SLEEP);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x07 + (row * 8)); /* End Row*/
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usleep(CMD_SLEEP);
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return error;
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}
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mraa_result_t
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SSD1327::clear()
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{
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mraa_result_t error = MRAA_SUCCESS;
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uint8_t columnIdx, rowIdx;
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for (rowIdx = 0; rowIdx < 12; rowIdx++) {
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// clear all columns
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for (columnIdx = 0; columnIdx < 12; columnIdx++) {
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writeChar(' ');
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}
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}
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return MRAA_SUCCESS;
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}
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mraa_result_t
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SSD1327::home()
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{
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return setCursor(0, 0);
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}
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mraa_result_t
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SSD1327::setGrayLevel(uint8_t level)
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{
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grayHigh = (level << 4) & 0xF0;
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grayLow = level & 0x0F;
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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_t
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SSD1327::writeChar(uint8_t value)
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{
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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 row = 0; row < 8; row = row + 2) {
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for (uint8_t col = 0; col < 8; col++) {
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uint8_t data = 0x0;
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uint8_t bitOne = ((BasicFont[value - 32][row]) >> col) & 0x1;
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uint8_t bitTwo = ((BasicFont[value - 32][row + 1]) >> col) & 0x1;
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data |= (bitOne) ? grayHigh : 0x00;
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data |= (bitTwo) ? grayLow : 0x00;
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m_i2c_lcd_control.writeReg(LCD_DATA, data);
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usleep(CMD_SLEEP - 2000);
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}
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}
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}
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mraa_result_t
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SSD1327::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); // set to normal display '1' is ON
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}
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mraa_result_t
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SSD1327::setHorizontalMode()
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{
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m_i2c_lcd_control.writeReg(LCD_CMD, 0xA0); // remap to
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usleep(CMD_SLEEP);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x42); // horizontal mode
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usleep(CMD_SLEEP);
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// Row Address
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x75); // Set Row Address
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usleep(CMD_SLEEP);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x00); // Start 0
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usleep(CMD_SLEEP);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x5f); // End 95
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usleep(CMD_SLEEP);
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// Column Address
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x15); // Set Column Address
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usleep(CMD_SLEEP);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x08); // Start from 8th Column of driver
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// IC. This is 0th Column for OLED
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usleep(CMD_SLEEP);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x37); // End at (8 + 47)th column. Each
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// Column has 2 pixels(or segments)
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usleep(CMD_SLEEP);
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}
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mraa_result_t
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SSD1327::setVerticalMode()
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{
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m_i2c_lcd_control.writeReg(LCD_CMD, 0xA0); // remap to
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usleep(CMD_SLEEP);
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m_i2c_lcd_control.writeReg(LCD_CMD, 0x46); // Vertical mode
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usleep(CMD_SLEEP);
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}
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