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Copy pathSDL_Arduino_SSD1306.cpp
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SDL_Arduino_SSD1306.cpp
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// further modified by SwitchDoc Labs for the ESP8266 and OurWeather
// only I2C Supported
// For Grove OLED 128x64 display by SwitchDoc Labs
/*********************************************************************
*
* First modifications By: Jordi Segura
*
Original from Adafruit
This is a library for Monochrome OLEDs based on SSD1306 drivers
Pick one up today in the adafruit shop!
------> http://www.adafruit.com/category/63_98
These displays use SPI to communicate, 4 or 5 pins are required to
interface
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
BSD license, check license.txt for more information
*********************************************************************/
//#include <avr/pgmspace.h> //commented for ESP8266 compatibility
#ifndef __SAM3X8E__
// #include <util/delay.h> //commented for ESP8266 compatibility
#endif
#include <stdlib.h>
#include <Wire.h> //needed for I2C comm
#include "AMAdafruit_GFX.h"
#include "SDL_Arduino_SSD1306.h" //Instead of "Adafruit_SSD1306.h"
// the memory buffer for the LCD
// OurWeather Splash
static uint8_t buffer[SSD1306_LCDHEIGHT * SSD1306_LCDWIDTH / 8] = {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xC0,0xE0,0xF8,0xF8,0xFC,0xFE,0xFF,0x7F,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0xFE,0xFC,0xF8,0xF0,0xE0,0xC0,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x80,
0x80,0x00,0x00,0x00,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0xC0,0xF8,0xFE,0xFF,0xFF,0x3F,0x3F,0x39,0x43,0x27,0x17,0x18,
0x09,0x1F,0x13,0x20,0xDF,0x0F,0xCF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFC,0xE0,0x00,0x00,0x00,0x00,0xFC,0xFF,0x03,0x01,0x01,0x03,0xFF,0xFC,0x00,0xFF,
0xFF,0x00,0x00,0x00,0xFF,0xFF,0x00,0x00,0xFF,0x61,0xE1,0xE1,0x7F,0x1E,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0xE0,0xFF,0xFF,0xFF,0xFF,0xEF,0xC7,0xC2,0x7F,0x80,0x80,0x80,0xE0,
0x18,0x06,0x03,0x01,0x01,0x01,0x01,0x03,0x07,0x1F,0x1F,0x1F,0x3F,0x7F,0xFF,0xFF,
0xFF,0xFF,0xFF,0x00,0x00,0x00,0xE1,0xE7,0xCF,0x0E,0x0E,0x0F,0xE7,0xE1,0xE0,0x01,
0x07,0x0E,0xEE,0xEE,0xEF,0x03,0xE0,0xE0,0xEF,0xE0,0xE0,0xE3,0xEF,0xEC,0x00,0x00,
0x00,0x00,0x00,0x00,0xC0,0xE0,0xE0,0xE0,0x00,0x00,0x00,0x00,0x00,0xE0,0xE0,0xE0,
0xE0,0xE0,0xE0,0xE0,0xE0,0xE0,0xE0,0x00,0xE0,0xE0,0xE0,0x00,0x00,0x00,0x00,0x00,
0xE0,0xE0,0xE0,0x00,0xE0,0xE0,0xE0,0xE0,0xE0,0xE0,0xE0,0xE0,0xE0,0x00,0x00,0xE0,
0xE0,0xE0,0xE0,0xE0,0xE0,0xE0,0xC0,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x03,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xF8,0xFC,0xF7,0x81,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xC0,0xFF,0xFF,
0xFF,0xFF,0x7F,0x00,0x00,0x00,0x03,0xFF,0xFF,0x80,0x00,0xFE,0xFF,0x1F,0xFF,0xF0,
0x00,0xF0,0xFF,0x3F,0x00,0x00,0xFF,0xFF,0xE1,0xE1,0xE1,0xE1,0xE1,0xE1,0x00,0x00,
0x00,0x00,0xC0,0xFC,0x7F,0x0F,0x03,0x3F,0xFE,0xE0,0x00,0x00,0x00,0x01,0x01,0x01,
0x01,0xFF,0xFF,0x01,0x01,0x01,0x01,0x00,0xFF,0xFF,0xFF,0xF0,0xF0,0xF0,0xF0,0xF0,
0xFF,0xFF,0xFF,0x00,0xFF,0xFF,0xFF,0xE1,0xE1,0xE1,0xE1,0xE1,0x01,0x00,0x00,0xFF,
0xFF,0xFF,0xC1,0xC1,0xC1,0xC1,0xFF,0xFF,0x1C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x07,0x1F,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xF3,0xF9,
0xDF,0xFF,0xFF,0xF1,0xFF,0x9F,0xFF,0xF3,0xF1,0xFF,0xE7,0xF3,0xFF,0xFF,0xFF,0x3F,
0x1F,0x03,0x00,0x00,0x00,0x00,0x00,0x01,0x3F,0xFF,0xFF,0x7F,0x01,0x00,0x07,0xFF,
0xFC,0xFF,0x0F,0x00,0x00,0x00,0xFF,0xFF,0xE1,0xE1,0xE1,0xE1,0xE1,0xE1,0xE0,0x00,
0xE0,0xFC,0x3F,0x0F,0x0F,0x0F,0x0F,0x0F,0x0F,0x3F,0xFE,0xF0,0x00,0x00,0x00,0x00,
0x00,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,
0xFF,0xFF,0xFF,0x00,0xFF,0xFF,0xFF,0xE1,0xE1,0xE1,0xE1,0xE1,0xE0,0x00,0x00,0xFF,
0xFF,0xFF,0x03,0x03,0x1F,0x7F,0xFD,0xF0,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x03,0x07,0x0F,0x1F,0x1F,0x3F,0x3F,
0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x3F,0x3F,0x3F,0x1F,0x0F,0x07,0x03,0x01,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
};
// the most basic function, set a single pixel
void SDL_Arduino_SSD1306::drawPixel(int16_t x, int16_t y, uint16_t color) {
if ((x < 0) || (x >= width()) || (y < 0) || (y >= height()))
return;
// check rotation, move pixel around if necessary
switch (getRotation()) {
case 1:
adagfxswap(x, y);
x = WIDTH - x - 1;
break;
case 2:
x = WIDTH - x - 1;
y = HEIGHT - y - 1;
break;
case 3:
adagfxswap(x, y);
y = HEIGHT - y - 1;
break;
}
// x is which column
switch (color)
{
case WHITE: buffer[x+ (y/8)*SSD1306_LCDWIDTH] |= (1 << (y&7)); break;
case BLACK: buffer[x+ (y/8)*SSD1306_LCDWIDTH] &= ~(1 << (y&7)); break;
case INVERSE: buffer[x+ (y/8)*SSD1306_LCDWIDTH] ^= (1 << (y&7)); break;
}
}
SDL_Arduino_SSD1306::SDL_Arduino_SSD1306(int8_t SID, int8_t SCLK, int8_t DC, int8_t RST, int8_t CS) : Adafruit_GFX(SSD1306_LCDWIDTH, SSD1306_LCDHEIGHT) {
cs = CS;
rst = RST;
dc = DC;
sclk = SCLK;
sid = SID;
hwSPI = false;
}
// constructor for hardware SPI - we indicate DataCommand, ChipSelect, Reset
SDL_Arduino_SSD1306::SDL_Arduino_SSD1306(int8_t DC, int8_t RST, int8_t CS) : Adafruit_GFX(SSD1306_LCDWIDTH, SSD1306_LCDHEIGHT) {
dc = DC;
rst = RST;
cs = CS;
hwSPI = true;
}
// initializer for I2C - we only indicate the reset pin!
SDL_Arduino_SSD1306::SDL_Arduino_SSD1306(int8_t reset) :
Adafruit_GFX(SSD1306_LCDWIDTH, SSD1306_LCDHEIGHT) {
sclk = dc = cs = sid = -1;
rst = reset;
}
void SDL_Arduino_SSD1306::begin(uint8_t vccstate, uint8_t i2caddr, bool reset) {
_vccstate = vccstate;
_i2caddr = i2caddr;
// set pin directions
if (sid != -1){
pinMode(dc, OUTPUT);
pinMode(cs, OUTPUT);
//commented for ESP8266 compatibility
// csport = portOutputRegister(digitalPinToPort(cs));
// cspinmask = digitalPinToBitMask(cs);
// dcport = portOutputRegister(digitalPinToPort(dc));
// dcpinmask = digitalPinToBitMask(dc);
if (!hwSPI){
// set pins for software-SPI
pinMode(sid, OUTPUT);
pinMode(sclk, OUTPUT);
//commented for ESP8266 compatibility
// clkport = portOutputRegister(digitalPinToPort(sclk));
// clkpinmask = digitalPinToBitMask(sclk);
// mosiport = portOutputRegister(digitalPinToPort(sid));
// mosipinmask = digitalPinToBitMask(sid);
}
if (hwSPI){
// SPI.begin ();
#ifdef __SAM3X8E__
// SPI.setClockDivider (9); // 9.3 MHz
#elif defined ESP8266 //Added for compatibility with ESP8266 board
// SPI.setClockDivider (SPI_CLOCK_DIV2); // 26/2 = 13 MHz (freq ESP8266 26 MHz)
#else
// SPI.setClockDivider (SPI_CLOCK_DIV2); // 8 MHz
#endif
// SPI.setDataMode(SPI_MODE0); //optional
// SPI.setBitOrder(MSBFIRST); //optional
}
}
else
{
// I2C Init
Wire.begin();
#ifdef __SAM3X8E__
// Force 400 KHz I2C, rawr! (Uses pins 20, 21 for SDA, SCL)
TWI1->TWI_CWGR = 0;
TWI1->TWI_CWGR = ((VARIANT_MCK / (2 * 400000)) - 4) * 0x101;
#endif
}
if (reset) {
// Setup reset pin direction (used by both SPI and I2C)
pinMode(rst, OUTPUT);
digitalWrite(rst, HIGH);
// VDD (3.3V) goes high at start, lets just chill for a ms
delay(1);
// bring reset low
digitalWrite(rst, LOW);
// wait 10ms
delay(10);
// bring out of reset
digitalWrite(rst, HIGH);
// turn on VCC (9V?)
}
#if defined SSD1306_128_32
// Init sequence for 128x32 OLED module
ssd1306_command(SSD1306_DISPLAYOFF); // 0xAE
ssd1306_command(SSD1306_SETDISPLAYCLOCKDIV); // 0xD5
ssd1306_command(0x80); // the suggested ratio 0x80
ssd1306_command(SSD1306_SETMULTIPLEX); // 0xA8
ssd1306_command(0x1F);
ssd1306_command(SSD1306_SETDISPLAYOFFSET); // 0xD3
ssd1306_command(0x0); // no offset
ssd1306_command(SSD1306_SETSTARTLINE | 0x0); // line #0
ssd1306_command(SSD1306_CHARGEPUMP); // 0x8D
if (vccstate == SSD1306_EXTERNALVCC)
{ ssd1306_command(0x10); }
else
{ ssd1306_command(0x14); }
ssd1306_command(SSD1306_MEMORYMODE); // 0x20
ssd1306_command(0x00); // 0x0 act like ks0108
ssd1306_command(SSD1306_SEGREMAP | 0x1);
ssd1306_command(SSD1306_COMSCANDEC);
ssd1306_command(SSD1306_SETCOMPINS); // 0xDA
ssd1306_command(0x02);
ssd1306_command(SSD1306_SETCONTRAST); // 0x81
ssd1306_command(0x8F);
ssd1306_command(SSD1306_SETPRECHARGE); // 0xd9
if (vccstate == SSD1306_EXTERNALVCC)
{ ssd1306_command(0x22); }
else
{ ssd1306_command(0xF1); }
ssd1306_command(SSD1306_SETVCOMDETECT); // 0xDB
ssd1306_command(0x40);
ssd1306_command(SSD1306_DISPLAYALLON_RESUME); // 0xA4
ssd1306_command(SSD1306_NORMALDISPLAY); // 0xA6
#endif
#if defined SSD1306_128_64
// Init sequence for 128x64 OLED module
ssd1306_command(SSD1306_DISPLAYOFF); // 0xAE
ssd1306_command(SSD1306_SETDISPLAYCLOCKDIV); // 0xD5
ssd1306_command(0x80); // the suggested ratio 0x80
ssd1306_command(SSD1306_SETMULTIPLEX); // 0xA8
ssd1306_command(0x3F);
ssd1306_command(SSD1306_SETDISPLAYOFFSET); // 0xD3
ssd1306_command(0x0); // no offset
ssd1306_command(SSD1306_SETSTARTLINE | 0x0); // line #0
ssd1306_command(SSD1306_CHARGEPUMP); // 0x8D
if (vccstate == SSD1306_EXTERNALVCC)
{ ssd1306_command(0x10); }
else
{ ssd1306_command(0x14); }
ssd1306_command(SSD1306_MEMORYMODE); // 0x20
ssd1306_command(0x00); // 0x0 act like ks0108
ssd1306_command(SSD1306_SEGREMAP | 0x1);
ssd1306_command(SSD1306_COMSCANDEC);
ssd1306_command(SSD1306_SETCOMPINS); // 0xDA
ssd1306_command(0x12);
ssd1306_command(SSD1306_SETCONTRAST); // 0x81
if (vccstate == SSD1306_EXTERNALVCC)
{ ssd1306_command(0x9F); }
else
{ ssd1306_command(0xCF); }
ssd1306_command(SSD1306_SETPRECHARGE); // 0xd9
if (vccstate == SSD1306_EXTERNALVCC)
{ ssd1306_command(0x22); }
else
{ ssd1306_command(0xF1); }
ssd1306_command(SSD1306_SETVCOMDETECT); // 0xDB
ssd1306_command(0x40);
ssd1306_command(SSD1306_DISPLAYALLON_RESUME); // 0xA4
ssd1306_command(SSD1306_NORMALDISPLAY); // 0xA6
#endif
#if defined SSD1306_96_16
// Init sequence for 96x16 OLED module
ssd1306_command(SSD1306_DISPLAYOFF); // 0xAE
ssd1306_command(SSD1306_SETDISPLAYCLOCKDIV); // 0xD5
ssd1306_command(0x80); // the suggested ratio 0x80
ssd1306_command(SSD1306_SETMULTIPLEX); // 0xA8
ssd1306_command(0x0F);
ssd1306_command(SSD1306_SETDISPLAYOFFSET); // 0xD3
ssd1306_command(0x00); // no offset
ssd1306_command(SSD1306_SETSTARTLINE | 0x0); // line #0
ssd1306_command(SSD1306_CHARGEPUMP); // 0x8D
if (vccstate == SSD1306_EXTERNALVCC)
{ ssd1306_command(0x10); }
else
{ ssd1306_command(0x14); }
ssd1306_command(SSD1306_MEMORYMODE); // 0x20
ssd1306_command(0x00); // 0x0 act like ks0108
ssd1306_command(SSD1306_SEGREMAP | 0x1);
ssd1306_command(SSD1306_COMSCANDEC);
ssd1306_command(SSD1306_SETCOMPINS); // 0xDA
ssd1306_command(0x2); //ada x12
ssd1306_command(SSD1306_SETCONTRAST); // 0x81
if (vccstate == SSD1306_EXTERNALVCC)
{ ssd1306_command(0x10); }
else
{ ssd1306_command(0xAF); }
ssd1306_command(SSD1306_SETPRECHARGE); // 0xd9
if (vccstate == SSD1306_EXTERNALVCC)
{ ssd1306_command(0x22); }
else
{ ssd1306_command(0xF1); }
ssd1306_command(SSD1306_SETVCOMDETECT); // 0xDB
ssd1306_command(0x40);
ssd1306_command(SSD1306_DISPLAYALLON_RESUME); // 0xA4
ssd1306_command(SSD1306_NORMALDISPLAY); // 0xA6
#endif
ssd1306_command(SSD1306_DISPLAYON);//--turn on oled panel
}
void SDL_Arduino_SSD1306::invertDisplay(uint8_t i) {
if (i) {
ssd1306_command(SSD1306_INVERTDISPLAY);
} else {
ssd1306_command(SSD1306_NORMALDISPLAY);
}
}
void SDL_Arduino_SSD1306::ssd1306_command(uint8_t c) {
if (sid != -1)
{
// SPI
digitalWrite(cs, HIGH); //uncommented for ESP8266 compatibility
// *csport |= cspinmask; //commented for ESP8266 compatibility
digitalWrite(dc, LOW); //uncommented for ESP8266 compatibility
// *dcport &= ~dcpinmask; //commented for ESP8266 compatibility
digitalWrite(cs, LOW); //uncommented for ESP8266 compatibility
// *csport &= ~cspinmask; //commented for ESP8266 compatibility
fastSPIwrite(c);
digitalWrite(cs, HIGH); //uncommented for ESP8266 compatibility
// *csport |= cspinmask; //commented for ESP8266 compatibility
}
else
{
// I2C
uint8_t control = 0x00; // Co = 0, D/C = 0
Wire.beginTransmission(_i2caddr);
WIRE_WRITE(control);
WIRE_WRITE(c);
Wire.endTransmission();
yield();
}
}
// startscrollright
// Activate a right handed scroll for rows start through stop
// Hint, the display is 16 rows tall. To scroll the whole display, run:
// display.scrollright(0x00, 0x0F)
void SDL_Arduino_SSD1306::startscrollright(uint8_t start, uint8_t stop){
ssd1306_command(SSD1306_RIGHT_HORIZONTAL_SCROLL);
ssd1306_command(0X00);
ssd1306_command(start);
ssd1306_command(0X00);
ssd1306_command(stop);
ssd1306_command(0X00);
ssd1306_command(0XFF);
ssd1306_command(SSD1306_ACTIVATE_SCROLL);
}
// startscrollleft
// Activate a right handed scroll for rows start through stop
// Hint, the display is 16 rows tall. To scroll the whole display, run:
// display.scrollright(0x00, 0x0F)
void SDL_Arduino_SSD1306::startscrollleft(uint8_t start, uint8_t stop){
ssd1306_command(SSD1306_LEFT_HORIZONTAL_SCROLL);
ssd1306_command(0X00);
ssd1306_command(start);
ssd1306_command(0X00);
ssd1306_command(stop);
ssd1306_command(0X00);
ssd1306_command(0XFF);
ssd1306_command(SSD1306_ACTIVATE_SCROLL);
}
// startscrolldiagright
// Activate a diagonal scroll for rows start through stop
// Hint, the display is 16 rows tall. To scroll the whole display, run:
// display.scrollright(0x00, 0x0F)
void SDL_Arduino_SSD1306::startscrolldiagright(uint8_t start, uint8_t stop){
ssd1306_command(SSD1306_SET_VERTICAL_SCROLL_AREA);
ssd1306_command(0X00);
ssd1306_command(SSD1306_LCDHEIGHT);
ssd1306_command(SSD1306_VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL);
ssd1306_command(0X00);
ssd1306_command(start);
ssd1306_command(0X00);
ssd1306_command(stop);
ssd1306_command(0X01);
ssd1306_command(SSD1306_ACTIVATE_SCROLL);
}
// startscrolldiagleft
// Activate a diagonal scroll for rows start through stop
// Hint, the display is 16 rows tall. To scroll the whole display, run:
// display.scrollright(0x00, 0x0F)
void SDL_Arduino_SSD1306::startscrolldiagleft(uint8_t start, uint8_t stop){
ssd1306_command(SSD1306_SET_VERTICAL_SCROLL_AREA);
ssd1306_command(0X00);
ssd1306_command(SSD1306_LCDHEIGHT);
ssd1306_command(SSD1306_VERTICAL_AND_LEFT_HORIZONTAL_SCROLL);
ssd1306_command(0X00);
ssd1306_command(start);
ssd1306_command(0X00);
ssd1306_command(stop);
ssd1306_command(0X01);
ssd1306_command(SSD1306_ACTIVATE_SCROLL);
}
void SDL_Arduino_SSD1306::stopscroll(void){
ssd1306_command(SSD1306_DEACTIVATE_SCROLL);
}
// Dim the display
// dim = true: display is dimmed
// dim = false: display is normal
void SDL_Arduino_SSD1306::dim(boolean dim) {
uint8_t contrast;
if (dim) {
contrast = 0; // Dimmed display
} else {
if (_vccstate == SSD1306_EXTERNALVCC) {
contrast = 0x9F;
} else {
contrast = 0xCF;
}
}
// the range of contrast to too small to be really useful
// it is useful to dim the display
ssd1306_command(SSD1306_SETCONTRAST);
ssd1306_command(contrast);
}
void SDL_Arduino_SSD1306::ssd1306_data(uint8_t c) {
if (sid != -1)
{
// SPI
digitalWrite(cs, HIGH); //uncommented for ESP8266 compatibility
//*csport |= cspinmask; //commented for ESP8266 compatibility
digitalWrite(dc, HIGH); //uncommented for ESP8266 compatibility
//*dcport |= dcpinmask; //commented for ESP8266 compatibility
digitalWrite(cs, LOW); //uncommented for ESP8266 compatibility
//*csport &= ~cspinmask; //commented for ESP8266 compatibility
fastSPIwrite(c);
digitalWrite(cs, HIGH); //uncommented for ESP8266 compatibility
//*csport |= cspinmask; //commented for ESP8266 compatibility
}
else
{
// I2C
uint8_t control = 0x40; // Co = 0, D/C = 1
Wire.beginTransmission(_i2caddr);
WIRE_WRITE(control);
WIRE_WRITE(c);
Wire.endTransmission();
}
}
void SDL_Arduino_SSD1306::display(void) {
ssd1306_command(SSD1306_COLUMNADDR);
ssd1306_command(0); // Column start address (0 = reset)
ssd1306_command(SSD1306_LCDWIDTH-1); // Column end address (127 = reset)
ssd1306_command(SSD1306_PAGEADDR);
ssd1306_command(0); // Page start address (0 = reset)
#if SSD1306_LCDHEIGHT == 64
ssd1306_command(7); // Page end address
#endif
#if SSD1306_LCDHEIGHT == 32
ssd1306_command(3); // Page end address
#endif
#if SSD1306_LCDHEIGHT == 16
ssd1306_command(1); // Page end address
#endif
if (sid != -1)
{
// SPI
digitalWrite(cs, HIGH); //added for ESP8266 compatibility
// *csport |= cspinmask; //commented for ESP8266 compatibility
digitalWrite(dc, HIGH); //added for ESP8266 compatibility
// *dcport |= dcpinmask; //commented for ESP8266 compatibility
digitalWrite(cs, LOW); //added for ESP8266 compatibility
// *csport &= ~cspinmask; //commented for ESP8266 compatibility
for (uint16_t i=0; i<(SSD1306_LCDWIDTH*SSD1306_LCDHEIGHT/8); i++) {
fastSPIwrite(buffer[i]);
//ssd1306_data(buffer[i]);
}
digitalWrite(cs, HIGH); //added for ESP8266 compatibility
// *csport |= cspinmask; //commented for ESP8266 compatibility
}
else
{
// save I2C bitrate
#ifndef __SAM3X8E__
// uint8_t twbrbackup = TWBR; //commented for ESP8266 compatibility
// TWBR = 12; // upgrade to 400KHz! //commented for ESP8266 compatibility
#endif
//Serial.println(TWBR, DEC);
//Serial.println(TWSR & 0x3, DEC);
// I2C
for (uint16_t i=0; i<(SSD1306_LCDWIDTH*SSD1306_LCDHEIGHT/8); i++) {
// send a bunch of data in one xmission
Wire.beginTransmission(_i2caddr);
WIRE_WRITE(0x40);
for (uint8_t x=0; x<16; x++) {
WIRE_WRITE(buffer[i]);
i++;
}
i--;
Wire.endTransmission();
yield();
}
#ifndef __SAM3X8E__
// TWBR = twbrbackup; //commented for ESP8266 compatibility
#endif
}
}
// clear everything
void SDL_Arduino_SSD1306::clearDisplay(void) {
memset(buffer, 0, (SSD1306_LCDWIDTH*SSD1306_LCDHEIGHT/8));
}
inline void SDL_Arduino_SSD1306::fastSPIwrite(uint8_t d) {
if(hwSPI) {
// (void)SPI.transfer(d);
} else {
for(uint8_t bit = 0x80; bit; bit >>= 1) {
*clkport &= ~clkpinmask;
if(d & bit) *mosiport |= mosipinmask;
else *mosiport &= ~mosipinmask;
*clkport |= clkpinmask;
}
}
//*csport |= cspinmask;
}
void SDL_Arduino_SSD1306::drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color) {
boolean bSwap = false;
switch(rotation) {
case 0:
// 0 degree rotation, do nothing
break;
case 1:
// 90 degree rotation, swap x & y for rotation, then invert x
bSwap = true;
adagfxswap(x, y);
x = WIDTH - x - 1;
break;
case 2:
// 180 degree rotation, invert x and y - then shift y around for height.
x = WIDTH - x - 1;
y = HEIGHT - y - 1;
x -= (w-1);
break;
case 3:
// 270 degree rotation, swap x & y for rotation, then invert y and adjust y for w (not to become h)
bSwap = true;
adagfxswap(x, y);
y = HEIGHT - y - 1;
y -= (w-1);
break;
}
if(bSwap) {
drawFastVLineInternal(x, y, w, color);
} else {
drawFastHLineInternal(x, y, w, color);
}
}
void SDL_Arduino_SSD1306::drawFastHLineInternal(int16_t x, int16_t y, int16_t w, uint16_t color) {
// Do bounds/limit checks
if(y < 0 || y >= HEIGHT) { return; }
// make sure we don't try to draw below 0
if(x < 0) {
w += x;
x = 0;
}
// make sure we don't go off the edge of the display
if( (x + w) > WIDTH) {
w = (WIDTH - x);
}
// if our width is now negative, punt
if(w <= 0) { return; }
// set up the pointer for movement through the buffer
register uint8_t *pBuf = buffer;
// adjust the buffer pointer for the current row
pBuf += ((y/8) * SSD1306_LCDWIDTH);
// and offset x columns in
pBuf += x;
register uint8_t mask = 1 << (y&7);
switch (color)
{
case WHITE: while(w--) { *pBuf++ |= mask; }; break;
case BLACK: mask = ~mask; while(w--) { *pBuf++ &= mask; }; break;
case INVERSE: while(w--) { *pBuf++ ^= mask; }; break;
}
}
void SDL_Arduino_SSD1306::drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color) {
bool bSwap = false;
switch(rotation) {
case 0:
break;
case 1:
// 90 degree rotation, swap x & y for rotation, then invert x and adjust x for h (now to become w)
bSwap = true;
adagfxswap(x, y);
x = WIDTH - x - 1;
x -= (h-1);
break;
case 2:
// 180 degree rotation, invert x and y - then shift y around for height.
x = WIDTH - x - 1;
y = HEIGHT - y - 1;
y -= (h-1);
break;
case 3:
// 270 degree rotation, swap x & y for rotation, then invert y
bSwap = true;
adagfxswap(x, y);
y = HEIGHT - y - 1;
break;
}
if(bSwap) {
drawFastHLineInternal(x, y, h, color);
} else {
drawFastVLineInternal(x, y, h, color);
}
}
void SDL_Arduino_SSD1306::drawFastVLineInternal(int16_t x, int16_t __y, int16_t __h, uint16_t color) {
// do nothing if we're off the left or right side of the screen
if(x < 0 || x >= WIDTH) { return; }
// make sure we don't try to draw below 0
if(__y < 0) {
// __y is negative, this will subtract enough from __h to account for __y being 0
__h += __y;
__y = 0;
}
// make sure we don't go past the height of the display
if( (__y + __h) > HEIGHT) {
__h = (HEIGHT - __y);
}
// if our height is now negative, punt
if(__h <= 0) {
return;
}
// this display doesn't need ints for coordinates, use local byte registers for faster juggling
register uint8_t y = __y;
register uint8_t h = __h;
// set up the pointer for fast movement through the buffer
register uint8_t *pBuf = buffer;
// adjust the buffer pointer for the current row
pBuf += ((y/8) * SSD1306_LCDWIDTH);
// and offset x columns in
pBuf += x;
// do the first partial byte, if necessary - this requires some masking
register uint8_t mod = (y&7);
if(mod) {
// mask off the high n bits we want to set
mod = 8-mod;
// note - lookup table results in a nearly 10% performance improvement in fill* functions
// register uint8_t mask = ~(0xFF >> (mod));
static uint8_t premask[8] = {0x00, 0x80, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC, 0xFE };
register uint8_t mask = premask[mod];
// adjust the mask if we're not going to reach the end of this byte
if( h < mod) {
mask &= (0XFF >> (mod-h));
}
switch (color)
{
case WHITE: *pBuf |= mask; break;
case BLACK: *pBuf &= ~mask; break;
case INVERSE: *pBuf ^= mask; break;
}
// fast exit if we're done here!
if(h<mod) { return; }
h -= mod;
pBuf += SSD1306_LCDWIDTH;
}
// write solid bytes while we can - effectively doing 8 rows at a time
if(h >= 8) {
if (color == INVERSE) { // separate copy of the code so we don't impact performance of the black/white write version with an extra comparison per loop
do {
*pBuf=~(*pBuf);
// adjust the buffer forward 8 rows worth of data
pBuf += SSD1306_LCDWIDTH;
// adjust h & y (there's got to be a faster way for me to do this, but this should still help a fair bit for now)
h -= 8;
} while(h >= 8);
}
else {
// store a local value to work with
register uint8_t val = (color == WHITE) ? 255 : 0;
do {
// write our value in
*pBuf = val;
// adjust the buffer forward 8 rows worth of data
pBuf += SSD1306_LCDWIDTH;
// adjust h & y (there's got to be a faster way for me to do this, but this should still help a fair bit for now)
h -= 8;
} while(h >= 8);
}
}
// now do the final partial byte, if necessary
if(h) {
mod = h & 7;
// this time we want to mask the low bits of the byte, vs the high bits we did above
// register uint8_t mask = (1 << mod) - 1;
// note - lookup table results in a nearly 10% performance improvement in fill* functions
static uint8_t postmask[8] = {0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F };
register uint8_t mask = postmask[mod];
switch (color)
{
case WHITE: *pBuf |= mask; break;
case BLACK: *pBuf &= ~mask; break;
case INVERSE: *pBuf ^= mask; break;
}
}
}