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Signed-off-by: Jon Trulson <jtrulson@ics.com> Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
171 lines
4.7 KiB
C++
171 lines
4.7 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 <stdexcept>
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#include <string>
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#include <unistd.h>
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#include "hd44780_bits.h"
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#include "ssd1308.h"
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using namespace upm;
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SSD1308::SSD1308(int bus_in, int addr_in) : m_i2c_lcd_control(bus_in)
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{
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m_lcd_control_address = addr_in;
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m_name = "SSD1308";
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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::invalid_argument(std::string(__FUNCTION__) +
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": I2c.address() failed");
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return;
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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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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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SSD1308::~SSD1308()
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{
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}
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mraa::Result
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SSD1308::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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SSD1308::write(std::string msg)
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{
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mraa::Result error = mraa::SUCCESS;
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uint8_t data[2] = { 0x40, 0 };
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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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SSD1308::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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SSD1308::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 mraa::SUCCESS;
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}
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mraa::Result
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SSD1308::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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SSD1308::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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SSD1308::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_1308); // 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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SSD1308::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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