upm/src/lcd/ssd1308.cxx

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/*
* Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
* Copyright (c) 2014 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <string>
#include <unistd.h>
#include "ssd1308.h"
using namespace upm;
SSD1308::SSD1308 (int bus_in, int addr_in) : I2CLcd (bus_in, addr_in) {
i2Cmd (m_i2c_lcd_control, DISPLAY_CMD_OFF); // display off
usleep (4500);
i2Cmd (m_i2c_lcd_control, DISPLAY_CMD_ON); // display on
usleep (4500);
setNormalDisplay (); // set to normal display '1' is ON
clear ();
setAddressingMode (PAGE);
}
SSD1308::~SSD1308 () {
}
mraa_result_t
SSD1308::draw (uint8_t *data, int bytes) {
mraa_result_t error = MRAA_SUCCESS;
setAddressingMode (HORIZONTAL);
for (int idx = 0; idx < bytes; idx++) {
i2cData (m_i2c_lcd_control, data[idx]);
}
return error;
}
/*
* **************
* virtual area
* **************
*/
mraa_result_t
SSD1308::write (std::string msg) {
mraa_result_t error = MRAA_SUCCESS;
uint8_t data[2] = {0x40, 0};
setAddressingMode (PAGE);
for (std::string::size_type i = 0; i < msg.size(); ++i) {
writeChar (m_i2c_lcd_control, msg[i]);
}
return error;
}
mraa_result_t
SSD1308::setCursor (int row, int column) {
mraa_result_t error = MRAA_SUCCESS;
error = i2Cmd (m_i2c_lcd_control, BASE_PAGE_START_ADDR + row); // set page address
error = i2Cmd (m_i2c_lcd_control, BASE_LOW_COLUMN_ADDR + (8 * column & 0x0F)); // set column lower address
error = i2Cmd (m_i2c_lcd_control, BASE_HIGH_COLUMN_ADDR + ((8 * column >> 4) & 0x0F)); // set column higher address
return error;
}
mraa_result_t
SSD1308::clear () {
mraa_result_t error = MRAA_SUCCESS;
uint8_t columnIdx, rowIdx;
i2Cmd (m_i2c_lcd_control, DISPLAY_CMD_OFF); // display off
for(rowIdx = 0; rowIdx < 8; rowIdx++) {
setCursor (rowIdx, 0);
// clear all columns
for(columnIdx = 0; columnIdx < 16; columnIdx++) {
writeChar (m_i2c_lcd_control, ' ');
}
}
i2Cmd (m_i2c_lcd_control, DISPLAY_CMD_ON); // display on
home ();
return MRAA_SUCCESS;
}
mraa_result_t
SSD1308::home () {
return setCursor (0, 0);
}
/*
* **************
* private area
* **************
*/
mraa_result_t
SSD1308::writeChar (mraa_i2c_context ctx, uint8_t value) {
if (value < 0x20 || value > 0x7F) {
value = 0x20; // space
}
for (uint8_t idx = 0; idx < 8; idx++) {
i2cData (m_i2c_lcd_control, BasicFont[value - 32][idx]);
}
}
mraa_result_t
SSD1308::setNormalDisplay () {
return i2Cmd (m_i2c_lcd_control, DISPLAY_CMD_SET_NORMAL_1308); // set to normal display '1' is ON
}
mraa_result_t
SSD1308::setAddressingMode (displayAddressingMode mode) {
i2Cmd (m_i2c_lcd_control, DISPLAY_CMD_MEM_ADDR_MODE); //set addressing mode
i2Cmd (m_i2c_lcd_control, mode); //set page addressing mode
}