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kernen_sh1106_lib.cpp
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/* Original copyright message that is wrong, but may not be removed:
**********************************************************************
This is a library for our 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
All text above, and the splash screen below must be included in any
redistribution
*********************************************************************
WonHo-maker adapted the library in 2015 to the SH1106 displays.
The only major change is the display() method.
Several scroll-related functions are not supported by the hardware,
so he removed those.
*********************************************************************
Dvogonen (kjell kernen) bugfixed and documented in 2017.
*********************************************************************/
#include <avr/pgmspace.h>
#ifndef __SAM3X8E__
#include <util/delay.h>
#endif
#include <stdlib.h>
#include <Wire.h>
#include "Adafruit_GFX.h"
#include "kernen_SH1106_lib.h"
// the memory buffer for the LCD
static uint8_t buffer[SH1106_LCDHEIGHT * SH1106_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, 0x80,
0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x80, 0x80, 0xC0, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 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, 0xF0, 0xF8, 0xFC, 0xF8, 0xE0, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x80,
0x80, 0x80, 0x00, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0xFF,
#if (SH1106_LCDHEIGHT * SH1106_LCDWIDTH > 96*16)
0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00,
0x80, 0xFF, 0xFF, 0x80, 0x80, 0x00, 0x80, 0x80, 0x00, 0x80, 0x80, 0x80, 0x80, 0x00, 0x80, 0x80,
0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x8C, 0x8E, 0x84, 0x00, 0x00, 0x80, 0xF8,
0xF8, 0xF8, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xE0, 0xE0, 0xC0, 0x80,
0x00, 0xE0, 0xFC, 0xFE, 0xFF, 0xFF, 0xFF, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFE, 0xFF, 0xC7, 0x01, 0x01,
0x01, 0x01, 0x83, 0xFF, 0xFF, 0x00, 0x00, 0x7C, 0xFE, 0xC7, 0x01, 0x01, 0x01, 0x01, 0x83, 0xFF,
0xFF, 0xFF, 0x00, 0x38, 0xFE, 0xC7, 0x83, 0x01, 0x01, 0x01, 0x83, 0xC7, 0xFF, 0xFF, 0x00, 0x00,
0x01, 0xFF, 0xFF, 0x01, 0x01, 0x00, 0xFF, 0xFF, 0x07, 0x01, 0x01, 0x01, 0x00, 0x00, 0x7F, 0xFF,
0x80, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x7F, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x01, 0xFF,
0xFF, 0xFF, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x03, 0x0F, 0x3F, 0x7F, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xE7, 0xC7, 0xC7, 0x8F,
0x8F, 0x9F, 0xBF, 0xFF, 0xFF, 0xC3, 0xC0, 0xF0, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFC, 0xFC, 0xFC,
0xFC, 0xFC, 0xFC, 0xFC, 0xFC, 0xF8, 0xF8, 0xF0, 0xF0, 0xE0, 0xC0, 0x00, 0x01, 0x03, 0x03, 0x03,
0x03, 0x03, 0x01, 0x03, 0x03, 0x00, 0x00, 0x00, 0x00, 0x01, 0x03, 0x03, 0x03, 0x03, 0x01, 0x01,
0x03, 0x01, 0x00, 0x00, 0x00, 0x01, 0x03, 0x03, 0x03, 0x03, 0x01, 0x01, 0x03, 0x03, 0x00, 0x00,
0x00, 0x03, 0x03, 0x00, 0x00, 0x00, 0x03, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x03, 0x03, 0x03, 0x03, 0x03, 0x01, 0x00, 0x00, 0x00, 0x01, 0x03, 0x01, 0x00, 0x00, 0x00, 0x03,
0x03, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
#if (SH1106_LCDHEIGHT == 64)
0x00, 0x00, 0x00, 0x80, 0xC0, 0xE0, 0xF0, 0xF9, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x3F, 0x1F, 0x0F,
0x87, 0xC7, 0xF7, 0xFF, 0xFF, 0x1F, 0x1F, 0x3D, 0xFC, 0xF8, 0xF8, 0xF8, 0xF8, 0x7C, 0x7D, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x3F, 0x0F, 0x07, 0x00, 0x30, 0x30, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0xFE, 0xFE, 0xFC, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xE0, 0xC0, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x30, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0xC0, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x7F, 0x3F, 0x1F,
0x0F, 0x07, 0x1F, 0x7F, 0xFF, 0xFF, 0xF8, 0xF8, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xF8, 0xE0,
0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFE, 0xFE, 0x00, 0x00,
0x00, 0xFC, 0xFE, 0xFC, 0x0C, 0x06, 0x06, 0x0E, 0xFC, 0xF8, 0x00, 0x00, 0xF0, 0xF8, 0x1C, 0x0E,
0x06, 0x06, 0x06, 0x0C, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0xFE, 0xFE, 0x00, 0x00, 0x00, 0x00, 0xFC,
0xFE, 0xFC, 0x00, 0x18, 0x3C, 0x7E, 0x66, 0xE6, 0xCE, 0x84, 0x00, 0x00, 0x06, 0xFF, 0xFF, 0x06,
0x06, 0xFC, 0xFE, 0xFC, 0x0C, 0x06, 0x06, 0x06, 0x00, 0x00, 0xFE, 0xFE, 0x00, 0x00, 0xC0, 0xF8,
0xFC, 0x4E, 0x46, 0x46, 0x46, 0x4E, 0x7C, 0x78, 0x40, 0x18, 0x3C, 0x76, 0xE6, 0xCE, 0xCC, 0x80,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x01, 0x07, 0x0F, 0x1F, 0x1F, 0x3F, 0x3F, 0x3F, 0x3F, 0x1F, 0x0F, 0x03,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00, 0x00,
0x00, 0x0F, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00, 0x00, 0x03, 0x07, 0x0E, 0x0C,
0x18, 0x18, 0x0C, 0x06, 0x0F, 0x0F, 0x0F, 0x00, 0x00, 0x01, 0x0F, 0x0E, 0x0C, 0x18, 0x0C, 0x0F,
0x07, 0x01, 0x00, 0x04, 0x0E, 0x0C, 0x18, 0x0C, 0x0F, 0x07, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00,
0x00, 0x0F, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x07,
0x07, 0x0C, 0x0C, 0x18, 0x1C, 0x0C, 0x06, 0x06, 0x00, 0x04, 0x0E, 0x0C, 0x18, 0x0C, 0x0F, 0x07,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
#endif
#endif
};
#define sh1106_swap(a, b) { int16_t t = a; a = b; b = t; }
// the most basic function, set a single pixel
void kernen_sh1106_lib::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:
sh1106_swap(x, y);
x = WIDTH - x - 1;
break;
case 2:
x = WIDTH - x - 1;
y = HEIGHT - y - 1;
break;
case 3:
sh1106_swap(x, y);
y = HEIGHT - y - 1;
break;
}
// x is which column
switch (color)
{
case WHITE: buffer[x + (y / 8)*SH1106_LCDWIDTH] |= (1 << (y & 7)); break;
case BLACK: buffer[x + (y / 8)*SH1106_LCDWIDTH] &= ~(1 << (y & 7)); break;
case INVERSE: buffer[x + (y / 8)*SH1106_LCDWIDTH] ^= (1 << (y & 7)); break;
}
}
kernen_sh1106_lib::kernen_sh1106_lib(int8_t SID, int8_t SCLK, int8_t DC, int8_t RST, int8_t CS) : Adafruit_GFX(SH1106_LCDWIDTH, SH1106_LCDHEIGHT) {
cs = CS;
rst = RST;
dc = DC;
sclk = SCLK;
sid = SID;
hwSPI = false;
}
// constructor for hardware SPI - we indicate DataCommand, ChipSelect, Reset
kernen_sh1106_lib::kernen_sh1106_lib(int8_t DC, int8_t RST, int8_t CS) : Adafruit_GFX(SH1106_LCDWIDTH, SH1106_LCDHEIGHT) {
dc = DC;
rst = RST;
cs = CS;
hwSPI = true;
}
// initializer for I2C - we only indicate the reset pin!
kernen_sh1106_lib::kernen_sh1106_lib(int8_t reset) :
Adafruit_GFX(SH1106_LCDWIDTH, SH1106_LCDHEIGHT) {
sclk = dc = cs = sid = -1;
rst = reset;
}
void kernen_sh1106_lib::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);
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);
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
#else
SPI.setClockDivider (SPI_CLOCK_DIV2); // 8 MHz
#endif
}
}
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 SH1106_128_32
// Init sequence for 128x32 OLED module
SH1106_command(SH1106_DISPLAYOFF); // 0xAE
SH1106_command(SH1106_SETDISPLAYCLOCKDIV); // 0xD5
SH1106_command(0x80); // the suggested ratio 0x80
SH1106_command(SH1106_SETMULTIPLEX); // 0xA8
SH1106_command(0x1F);
SH1106_command(SH1106_SETDISPLAYOFFSET); // 0xD3
SH1106_command(0x0); // no offset
SH1106_command(SH1106_SETSTARTLINE | 0x0); // line #0
SH1106_command(SH1106_CHARGEPUMP); // 0x8D
if (vccstate == SH1106_EXTERNALVCC)
{
SH1106_command(0x10);
}
else
{
SH1106_command(0x14);
}
SH1106_command(SH1106_MEMORYMODE); // 0x20
SH1106_command(0x00); // 0x0 act like ks0108
SH1106_command(SH1106_SEGREMAP | 0x1);
SH1106_command(SH1106_COMSCANDEC);
SH1106_command(SH1106_SETCOMPINS); // 0xDA
SH1106_command(0x02);
SH1106_command(SH1106_SETCONTRAST); // 0x81
SH1106_command(0x8F);
SH1106_command(SH1106_SETPRECHARGE); // 0xd9
if (vccstate == SH1106_EXTERNALVCC)
{
SH1106_command(0x22);
}
else
{
SH1106_command(0xF1);
}
SH1106_command(SH1106_SETVCOMDETECT); // 0xDB
SH1106_command(0x40);
SH1106_command(SH1106_DISPLAYALLON_RESUME); // 0xA4
SH1106_command(SH1106_NORMALDISPLAY); // 0xA6
#endif
#if defined SH1106_128_64
// Init sequence for 128x64 OLED module
SH1106_command(SH1106_DISPLAYOFF); // 0xAE
SH1106_command(SH1106_SETDISPLAYCLOCKDIV); // 0xD5
SH1106_command(0x80); // the suggested ratio 0x80
SH1106_command(SH1106_SETMULTIPLEX); // 0xA8
SH1106_command(0x3F);
SH1106_command(SH1106_SETDISPLAYOFFSET); // 0xD3
SH1106_command(0x00); // no offset
SH1106_command(SH1106_SETSTARTLINE | 0x0); // line #0 0x40
SH1106_command(SH1106_CHARGEPUMP); // 0x8D
if (vccstate == SH1106_EXTERNALVCC)
{
SH1106_command(0x10);
}
else
{
SH1106_command(0x14);
}
SH1106_command(SH1106_MEMORYMODE); // 0x20
SH1106_command(0x00); // 0x0 act like ks0108
SH1106_command(SH1106_SEGREMAP | 0x1);
SH1106_command(SH1106_COMSCANDEC);
SH1106_command(SH1106_SETCOMPINS); // 0xDA
SH1106_command(0x12);
SH1106_command(SH1106_SETCONTRAST); // 0x81
if (vccstate == SH1106_EXTERNALVCC)
{
SH1106_command(0x9F);
}
else
{
SH1106_command(0xCF);
}
SH1106_command(SH1106_SETPRECHARGE); // 0xd9
if (vccstate == SH1106_EXTERNALVCC)
{
SH1106_command(0x22);
}
else
{
SH1106_command(0xF1);
}
SH1106_command(SH1106_SETVCOMDETECT); // 0xDB
SH1106_command(0x40);
SH1106_command(SH1106_DISPLAYALLON_RESUME); // 0xA4
SH1106_command(SH1106_NORMALDISPLAY); // 0xA6
#endif
#if defined SH1106_96_16
// Init sequence for 96x16 OLED module
SH1106_command(SH1106_DISPLAYOFF); // 0xAE
SH1106_command(SH1106_SETDISPLAYCLOCKDIV); // 0xD5
SH1106_command(0x80); // the suggested ratio 0x80
SH1106_command(SH1106_SETMULTIPLEX); // 0xA8
SH1106_command(0x0F);
SH1106_command(SH1106_SETDISPLAYOFFSET); // 0xD3
SH1106_command(0x00); // no offset
SH1106_command(SH1106_SETSTARTLINE | 0x0); // line #0
SH1106_command(SH1106_CHARGEPUMP); // 0x8D
if (vccstate == SH1106_EXTERNALVCC)
{
SH1106_command(0x10);
}
else
{
SH1106_command(0x14);
}
SH1106_command(SH1106_MEMORYMODE); // 0x20
SH1106_command(0x00); // 0x0 act like ks0108
SH1106_command(SH1106_SEGREMAP | 0x1);
SH1106_command(SH1106_COMSCANDEC);
SH1106_command(SH1106_SETCOMPINS); // 0xDA
SH1106_command(0x2); //ada x12
SH1106_command(SH1106_SETCONTRAST); // 0x81
if (vccstate == SH1106_EXTERNALVCC)
{
SH1106_command(0x10);
}
else
{
SH1106_command(0xAF);
}
SH1106_command(SH1106_SETPRECHARGE); // 0xd9
if (vccstate == SH1106_EXTERNALVCC)
{
SH1106_command(0x22);
}
else
{
SH1106_command(0xF1);
}
SH1106_command(SH1106_SETVCOMDETECT); // 0xDB
SH1106_command(0x40);
SH1106_command(SH1106_DISPLAYALLON_RESUME); // 0xA4
SH1106_command(SH1106_NORMALDISPLAY); // 0xA6
#endif
SH1106_command(SH1106_DISPLAYON);//--turn on oled panel
}
void kernen_sh1106_lib::invertDisplay(uint8_t i) {
if (i) {
SH1106_command(SH1106_INVERTDISPLAY);
} else {
SH1106_command(SH1106_NORMALDISPLAY);
}
}
void kernen_sh1106_lib::SH1106_command(uint8_t c) {
if (sid != -1)
{
// SPI
//digitalWrite(cs, HIGH);
*csport |= cspinmask;
//digitalWrite(dc, LOW);
*dcport &= ~dcpinmask;
//digitalWrite(cs, LOW);
*csport &= ~cspinmask;
fastSPIwrite(c);
//digitalWrite(cs, HIGH);
*csport |= cspinmask;
}
else
{
// I2C
uint8_t control = 0x00; // Co = 0, D/C = 0
Wire.beginTransmission(_i2caddr);
WIRE_WRITE(control);
WIRE_WRITE(c);
Wire.endTransmission();
}
}
void kernen_sh1106_lib::SH1106_data(uint8_t c) {
if (sid != -1)
{
// SPI
//digitalWrite(cs, HIGH);
*csport |= cspinmask;
//digitalWrite(dc, HIGH);
*dcport |= dcpinmask;
//digitalWrite(cs, LOW);
*csport &= ~cspinmask;
fastSPIwrite(c);
//digitalWrite(cs, HIGH);
*csport |= cspinmask;
}
else
{
// I2C
uint8_t control = 0x40; // Co = 0, D/C = 1
Wire.beginTransmission(_i2caddr);
WIRE_WRITE(control);
WIRE_WRITE(c);
Wire.endTransmission();
}
}
void kernen_sh1106_lib::display(void) {
SH1106_command(SH1106_SETLOWCOLUMN | 0x0); // low col = 0
SH1106_command(SH1106_SETHIGHCOLUMN | 0x0); // hi col = 0
SH1106_command(SH1106_SETSTARTLINE | 0x0); // line #0
byte m_row = 0;
byte m_col = 2;
byte height = SH1106_LCDHEIGHT;
byte width = SH1106_LCDWIDTH;
height >>= 3;
width >>= 3;
int p = 0;
byte i, j, k = 0;
if (sid != -1)
{
for ( i = 0; i < height; i++)
{
// send a bunch of data in one xmission
SH1106_command(0xB0 + i + m_row); //set page address
SH1106_command(m_col & 0xf); //set lower column address
SH1106_command(0x10 | (m_col >> 4)); //set higher column address
for ( j = 0; j < 8; j++)
{
// SPI
*csport |= cspinmask;
*dcport |= dcpinmask;
*csport &= ~cspinmask;
for ( k = 0; k < width; k++, p++)
{
fastSPIwrite(buffer[p]);
}
*csport |= cspinmask;
}
}
}
else
{
// save I2C bitrate
#ifndef __SAM3X8E__
uint8_t twbrbackup = TWBR;
TWBR = 12; // upgrade to 400KHz!
#endif
for ( i = 0; i < height; i++)
{
// send a bunch of data in one xmission
SH1106_command(0xB0 + i + m_row); //set page address
SH1106_command(m_col & 0xf); //set lower column address
SH1106_command(0x10 | (m_col >> 4)); //set higher column address
for ( j = 0; j < 8; j++)
{
Wire.beginTransmission(_i2caddr);
Wire.write(0x40);
for ( k = 0; k < width; k++, p++)
{
Wire.write(buffer[p]);
}
Wire.endTransmission();
}
}
#ifndef __SAM3X8E__
TWBR = twbrbackup;
#endif
}
}
// clear everything
void kernen_sh1106_lib::clearDisplay(void) {
memset(buffer, 0, (SH1106_LCDWIDTH * SH1106_LCDHEIGHT / 8));
}
inline void kernen_sh1106_lib::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;
}
}
}
void kernen_sh1106_lib::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;
sh1106_swap(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;
sh1106_swap(x, y);
y = HEIGHT - y - 1;
y -= (w - 1);
break;
}
if (bSwap) {
drawFastVLineInternal(x, y, w, color);
} else {
drawFastHLineInternal(x, y, w, color);
}
}
void kernen_sh1106_lib::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) * SH1106_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 kernen_sh1106_lib::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;
sh1106_swap(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;
sh1106_swap(x, y);
y = HEIGHT - y - 1;
break;
}
if (bSwap) {
drawFastHLineInternal(x, y, h, color);
} else {
drawFastVLineInternal(x, y, h, color);
}
}
void kernen_sh1106_lib::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) * SH1106_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 += SH1106_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 += SH1106_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 += SH1106_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;
}
}
}