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/*
* Author: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
* Copyright (c) 2016 Intel Corporation.
*
* Based on Adafruit SSD1351 library.
*
* 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 <iostream>
#include <string>
#include <stdexcept>
#include <unistd.h>
#include <stdlib.h>
#include "ssd1351.h"
using namespace upm;
using namespace std;
SSD1351::SSD1351 (uint8_t oc, uint8_t dc, uint8_t rst) :
GFX(SSD1351WIDTH, SSD1351HEIGHT),
m_spi(0), m_oc(oc), m_dc(dc), m_rst(rst) {
m_name = "SSD1351";
m_usemap = true;
// Setup SPI bus
m_spi.frequency(8 * 1000000);
m_spi.mode(mraa::SPI_MODE3);
m_spi.writeByte(0x00); // Need to bring clk high before init
// Init pins
if (m_oc.dir(mraa::DIR_OUT) != mraa::SUCCESS) {
throw std::runtime_error(string(__FUNCTION__) +
": Could not initialize CS pin");
return;
}
m_oc.useMmap(true);
if (m_dc.dir(mraa::DIR_OUT) != mraa::SUCCESS) {
throw std::runtime_error(string(__FUNCTION__) +
": Could not initialize data/cmd pin");
return;
}
m_dc.useMmap(true);
if (m_rst.dir(mraa::DIR_OUT) != mraa::SUCCESS) {
throw std::runtime_error(string(__FUNCTION__) +
": Could not initialize reset pin");
return;
}
// Toggle reset pin
ocLow();
m_rst.write(1);
usleep(500000);
m_rst.write(0);
usleep(500000);
m_rst.write(1);
usleep(500000);
// Configure and init display
writeCommand(SSD1351_CMD_COMMANDLOCK);
writeData(0x12);
writeCommand(SSD1351_CMD_COMMANDLOCK);
writeData(0xB1);
writeCommand(SSD1351_CMD_DISPLAYOFF);
writeCommand(SSD1351_CMD_CLOCKDIV);
writeCommand(0xF1);
writeCommand(SSD1351_CMD_MUXRATIO);
writeData(127);
writeCommand(SSD1351_CMD_SETREMAP);
writeData(0x74);
writeCommand(SSD1351_CMD_SETCOLUMN);
writeData(0x00);
writeData(0x7F);
writeCommand(SSD1351_CMD_SETROW);
writeData(0x00);
writeData(0x7F);
writeCommand(SSD1351_CMD_STARTLINE);
if (SSD1351HEIGHT == 96) {
writeData(96);
} else {
writeData(0);
}
writeCommand(SSD1351_CMD_DISPLAYOFFSET);
writeData(0x0);
writeCommand(SSD1351_CMD_SETGPIO);
writeData(0x00);
writeCommand(SSD1351_CMD_FUNCTIONSELECT);
writeData(0x01);
writeCommand(SSD1351_CMD_PRECHARGE);
writeCommand(0x32);
writeCommand(SSD1351_CMD_VCOMH);
writeCommand(0x05);
writeCommand(SSD1351_CMD_NORMALDISPLAY);
writeCommand(SSD1351_CMD_CONTRASTABC);
writeData(0xC8);
writeData(0x80);
writeData(0xC8);
writeCommand(SSD1351_CMD_CONTRASTMASTER);
writeData(0x0F);
writeCommand(SSD1351_CMD_SETVSL );
writeData(0xA0);
writeData(0xB5);
writeData(0x55);
writeCommand(SSD1351_CMD_PRECHARGE2);
writeData(0x01);
writeCommand(SSD1351_CMD_DISPLAYON);
}
SSD1351::~SSD1351() {
}
void
SSD1351::writeCommand (uint8_t value) {
dcLow();
m_spi.writeByte(value);
}
void
SSD1351::writeData (uint8_t value) {
dcHigh ();
m_spi.writeByte(value);
}
void
SSD1351::drawPixel(int16_t x, int16_t y, uint16_t color) {
if ((x < 0) || (y < 0) || (x >= SSD1351WIDTH) || (y >= SSD1351HEIGHT))
return;
if(m_usemap) {
int index = (y * SSD1351WIDTH + x) * 2;
m_map[index] = color >> 8;
m_map[index + 1] = color;
} else {
writeCommand(SSD1351_CMD_SETCOLUMN);
writeData(x);
writeData(SSD1351WIDTH-1);
writeCommand(SSD1351_CMD_SETROW);
writeData(y);
writeData(SSD1351HEIGHT-1);
writeCommand(SSD1351_CMD_WRITERAM);
writeData(color >> 8);
writeData(color);
}
}
void
SSD1351::refresh () {
writeCommand(SSD1351_CMD_WRITERAM);
int blockSize = SSD1351HEIGHT * SSD1351WIDTH * 2 / BLOCKS;
dcHigh();
for (int block = 0; block < BLOCKS; block++) {
m_spi.write(&m_map[block * blockSize], blockSize);
}
}
void
SSD1351::ocLow() {
if (m_oc.write(LOW) != mraa::SUCCESS) {
throw std::runtime_error(string(__FUNCTION__) +
": Failed to write CS pin");
}
}
void
SSD1351::ocHigh() {
if (m_oc.write(HIGH) != mraa::SUCCESS) {
throw std::runtime_error(string(__FUNCTION__) +
": Failed to write CS pin");
}
}
void
SSD1351::dcLow() {
if (m_dc.write(LOW) != mraa::SUCCESS) {
throw std::runtime_error(string(__FUNCTION__) +
": Failed to write data/cmd pin");
}
}
void
SSD1351::dcHigh() {
if (m_dc.write(HIGH) != mraa::SUCCESS) {
throw std::runtime_error(string(__FUNCTION__) +
": Failed to write data/cmd pin");
}
}
void
upm::SSD1351::useMemoryMap(bool var) {
m_usemap = var;
}
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