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Adafruit_SSD1306/SSD1306.cpp
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// some of this code was written by <cstone@pobox.com> originally;
// it is in the public domain.
//#include <Wire.h>
#include <avr/pgmspace.h>
#include <WProgram.h>
#include <util/delay.h>
#include <stdlib.h>
#include "SSD1306.h"
static uint8_t is_reversed = 0;
// a handy reference to where the pages are on the screen
const uint8_t pagemap[] = { 0, 1, 2, 3, 4, 5, 6, 7};
// a 5x7 font table
extern uint8_t PROGMEM font[];
// the memory buffer for the LCD
static uint8_t buffer[1024] = {
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0XC0, 0XE0, 0XF0, 0XF8, 0XF8, 0XCF, 0XCF, 0XCF, 0XCF, 0XE0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0XFE, 0XFC, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0XF8, 0XFC, 0XE, 0XE, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X60, 0X60, 0X0, 0X0, 0X0, 0XC0, 0XC0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0XF8, 0XF8, 0XF8, 0XF8, 0XF8, 0XF8, 0XF8, 0XF8, 0XF8, 0XF8, 0XF8, 0XF8, 0XF8, 0XF0, 0XE0, 0XE0,
0XE0, 0XFC, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0X7F, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0X7C, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0XF0, 0XFC,
0XE, 0X6, 0X6, 0X6, 0X6, 0XC, 0XFE, 0XFC, 0X0, 0X0, 0XF8, 0XFC, 0XE, 0X6, 0X6, 0X6,
0X6, 0X9C, 0XFF, 0XFF, 0X0, 0X60, 0XF8, 0X9C, 0X6, 0X6, 0X6, 0X6, 0XC, 0XFC, 0XFE, 0X0,
0X0, 0X6, 0XFF, 0XFF, 0X6, 0X6, 0X0, 0XFE, 0XFE, 0XE, 0X6, 0X6, 0X2, 0X0, 0XFE, 0XFE,
0X0, 0X0, 0X0, 0X0, 0XFE, 0XFE, 0X0, 0X0, 0X0, 0XFE, 0XFE, 0X0, 0X0, 0X6, 0XFF, 0XFF,
0X6, 0X6, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X1, 0X1F, 0X3F, 0X7F, 0X7F, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XF7, 0XE7, 0XE7, 0XC7,
0XCF, 0X9F, 0XFF, 0XFF, 0XFF, 0XEF, 0XE0, 0XF8, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XE0F, 0XFF,
0XFE, 0XFE, 0XFE, 0XFE, 0XFE, 0XFE, 0XFC, 0XFC, 0XF8, 0XF0, 0XE0, 0XC0, 0X0, 0X0, 0X0, 0X3,
0X7, 0X6, 0X4, 0X4, 0X6, 0X7, 0X7, 0X7, 0X0, 0X0, 0X1, 0X3, 0X7, 0X6, 0X4, 0X6,
0X6, 0X7, 0X7, 0X7, 0X0, 0X0, 0X1, 0X3, 0X6, 0X6, 0X4, 0X6, 0X6, 0X7, 0X7, 0X0,
0X0, 0X0, 0X7, 0X7, 0X0, 0X0, 0X0, 0X7, 0X7, 0X0, 0X0, 0X0, 0X0, 0X0, 0X1, 0X7,
0X6, 0X6, 0X6, 0X6, 0X7, 0X1, 0X0, 0X0, 0X0, 0X7, 0X7, 0X0, 0X0, 0X0, 0X7, 0X7,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0XC0, 0XE0, 0XF8, 0XF9, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XBF, 0X8F, 0XC7,
0XC7, 0XF3, 0XFF, 0XFF, 0XFF, 0XFF, 0XF, 0X3F, 0XFE, 0XFC, 0XFC, 0XFC, 0XFC, 0XFE, 0XFF, 0XFF,
0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0X7F, 0X3F, 0XF, 0X7, 0X1, 0X0, 0X0, 0X0, 0X30,
0X38, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0XFE, 0XFE, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0XE0, 0XE0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X38, 0X30, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0XE0, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0X7F, 0X7F, 0X7F, 0X7F, 0X3F, 0X1F,
0X1F, 0XF, 0X7F, 0XFF, 0XFF, 0XFF, 0XFE, 0XFC, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XF8,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0XFF,
0XFF, 0X0, 0X0, 0X0, 0XFF, 0XFF, 0X7, 0X3, 0X3, 0X3, 0XFF, 0XFE, 0X0, 0X0, 0X78, 0XFE,
0X87, 0X3, 0X3, 0X3, 0X3, 0X86, 0XFF, 0XFF, 0X0, 0X0, 0X7F, 0XFF, 0X80, 0X0, 0X0, 0X0,
0XFF, 0XFF, 0X0, 0X0, 0X84, 0X9F, 0X1F, 0X3B, 0X33, 0XF3, 0XE0, 0X0, 0X3, 0XFF, 0XFF, 0X3,
0X1, 0X0, 0XFF, 0XFF, 0X3, 0X3, 0X1, 0X0, 0X0, 0XFF, 0XFF, 0X0, 0X0, 0XF8, 0XFE, 0X9F,
0X13, 0X13, 0X13, 0X13, 0X9E, 0X9C, 0X0, 0X0, 0X8E, 0X9F, 0X1B, 0X33, 0X73, 0XE2, 0XC0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X1, 0X1, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X1, 0X3, 0X7, 0XF, 0X1F, 0X1F, 0X3F, 0X3F, 0X3F, 0X3F, 0X1F, 0XF, 0X3,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X3,
0X3, 0X0, 0X0, 0X0, 0X3, 0X3, 0X0, 0X0, 0X0, 0X0, 0X3, 0X3, 0X0, 0X0, 0X0, 0X1,
0X3, 0X3, 0X3, 0X3, 0X3, 0X1, 0X3, 0X3, 0X0, 0X0, 0X0, 0X1, 0X3, 0X3, 0X3, 0X3,
0X3, 0X1, 0X0, 0X0, 0X1, 0X3, 0X3, 0X3, 0X3, 0X3, 0X0, 0X0, 0X0, 0X3, 0X3, 0X0,
0X0, 0X0, 0X3, 0X1, 0X0, 0X0, 0X0, 0X0, 0X0, 0X3, 0X3, 0X0, 0X0, 0X0, 0X1, 0X3,
0X3, 0X3, 0X3, 0X3, 0X1, 0X1, 0X0, 0X0, 0X1, 0X3, 0X3, 0X3, 0X3, 0X1, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0, 0X0,
};
void SSD1306::drawbitmap(uint8_t x, uint8_t y,
const uint8_t *bitmap, uint8_t w, uint8_t h,
uint8_t color) {
for (uint8_t j=0; j<h; j++) {
for (uint8_t i=0; i<w; i++ ) {
if (pgm_read_byte(bitmap + i + (j/8)*w) & _BV(j%8)) {
setpixel(x+i, y+j, color);
}
}
}
}
void SSD1306::drawstring(uint8_t x, uint8_t line, char *c) {
while (c[0] != 0) {
drawchar(x, line, c[0]);
c++;
x += 6; // 6 pixels wide
if (x + 6 >= SSD1306_LCDWIDTH) {
x = 0; // ran out of this line
line++;
}
if (line >= (SSD1306_LCDHEIGHT/8))
return; // ran out of space :(
}
}
void SSD1306::drawchar(uint8_t x, uint8_t line, char c) {
for (uint8_t i =0; i<5; i++ ) {
buffer[x + (line*128) ] = pgm_read_byte(font+(c*5)+i);
x++;
}
}
// bresenham's algorithm - thx wikpedia
void SSD1306::drawline(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1,
uint8_t color) {
uint8_t steep = abs(y1 - y0) > abs(x1 - x0);
if (steep) {
swap(x0, y0);
swap(x1, y1);
}
if (x0 > x1) {
swap(x0, x1);
swap(y0, y1);
}
uint8_t dx, dy;
dx = x1 - x0;
dy = abs(y1 - y0);
int8_t err = dx / 2;
int8_t ystep;
if (y0 < y1) {
ystep = 1;
} else {
ystep = -1;}
for (; x0<x1; x0++) {
if (steep) {
setpixel(y0, x0, color);
} else {
setpixel(x0, y0, color);
}
err -= dy;
if (err < 0) {
y0 += ystep;
err += dx;
}
}
}
// filled rectangle
void SSD1306::fillrect(uint8_t x, uint8_t y, uint8_t w, uint8_t h,
uint8_t color) {
// stupidest version - just pixels - but fast with internal buffer!
for (uint8_t i=x; i<x+w; i++) {
for (uint8_t j=y; j<y+h; j++) {
setpixel(i, j, color);
}
}
}
// draw a rectangle
void SSD1306::drawrect(uint8_t x, uint8_t y, uint8_t w, uint8_t h,
uint8_t color) {
// stupidest version - just pixels - but fast with internal buffer!
for (uint8_t i=x; i<x+w; i++) {
setpixel(i, y, color);
setpixel(i, y+h-1, color);
}
for (uint8_t i=y; i<y+h; i++) {
setpixel(x, i, color);
setpixel(x+w-1, i, color);
}
}
// draw a circle outline
void SSD1306::drawcircle(uint8_t x0, uint8_t y0, uint8_t r,
uint8_t color) {
int8_t f = 1 - r;
int8_t ddF_x = 1;
int8_t ddF_y = -2 * r;
int8_t x = 0;
int8_t y = r;
setpixel(x0, y0+r, color);
setpixel(x0, y0-r, color);
setpixel(x0+r, y0, color);
setpixel(x0-r, y0, color);
while (x<y) {
if (f >= 0) {
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
setpixel(x0 + x, y0 + y, color);
setpixel(x0 - x, y0 + y, color);
setpixel(x0 + x, y0 - y, color);
setpixel(x0 - x, y0 - y, color);
setpixel(x0 + y, y0 + x, color);
setpixel(x0 - y, y0 + x, color);
setpixel(x0 + y, y0 - x, color);
setpixel(x0 - y, y0 - x, color);
}
}
void SSD1306::fillcircle(uint8_t x0, uint8_t y0, uint8_t r,
uint8_t color) {
int8_t f = 1 - r;
int8_t ddF_x = 1;
int8_t ddF_y = -2 * r;
int8_t x = 0;
int8_t y = r;
for (uint8_t i=y0-r; i<=y0+r; i++) {
setpixel(x0, i, color);
}
while (x<y) {
if (f >= 0) {
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
for (uint8_t i=y0-y; i<=y0+y; i++) {
setpixel(x0+x, i, color);
setpixel(x0-x, i, color);
}
for (uint8_t i=y0-x; i<=y0+x; i++) {
setpixel(x0+y, i, color);
setpixel(x0-y, i, color);
}
}
}
// the most basic function, set a single pixel
void SSD1306::setpixel(uint8_t x, uint8_t y, uint8_t color) {
if ((x >= SSD1306_LCDWIDTH) || (y >= SSD1306_LCDHEIGHT))
return;
// x is which column
if (color == WHITE)
buffer[x+ (y/8)*128] |= _BV((y%8));
else
buffer[x+ (y/8)*128] &= ~_BV((y%8));
}
void SSD1306::ssd1306_init(uint8_t vccstate) {
// set pin directions
pinMode(sid, OUTPUT);
pinMode(sclk, OUTPUT);
pinMode(dc, OUTPUT);
pinMode(rst, OUTPUT);
pinMode(cs, OUTPUT);
digitalWrite(rst, HIGH);
// VDD (3.3V) goes high at start, lets just chill for a ms
delay(1);
// bring0xset low
digitalWrite(rst, LOW);
// wait 10ms
delay(10);
// bring out of reset
digitalWrite(rst, HIGH);
// turn on VCC (9V?)
ssd1306_command(SSD1306_DISPLAYOFF); // 0xAE
ssd1306_command(SSD1306_SETLOWCOLUMN | 0x0); // low col = 0
ssd1306_command(SSD1306_SETHIGHCOLUMN | 0x0); // hi col = 0
ssd1306_command(SSD1306_SETSTARTLINE | 0x0); // line #0
ssd1306_command(SSD1306_SETCONTRAST); // 0x81
if (vccstate == SSD1306_EXTERNALVCC) {
ssd1306_command(0x9F); // external 9V
} else {
ssd1306_command(0xCF); // chargepump
}
ssd1306_command(0xa1); // setment remap 95 to 0 (?)
ssd1306_command(SSD1306_NORMALDISPLAY); // 0xA6
ssd1306_command(SSD1306_DISPLAYALLON_RESUME); // 0xA4
ssd1306_command(SSD1306_SETMULTIPLEX); // 0xA8
ssd1306_command(0x3F); // 0x3F 1/64 duty
ssd1306_command(SSD1306_SETDISPLAYOFFSET); // 0xD3
ssd1306_command(0x0); // no offset
ssd1306_command(SSD1306_SETDISPLAYCLOCKDIV); // 0xD5
ssd1306_command(0x80); // the suggested ratio 0x80
ssd1306_command(SSD1306_SETPRECHARGE); // 0xd9
if (vccstate == SSD1306_EXTERNALVCC) {
ssd1306_command(0x22); // external 9V
} else {
ssd1306_command(0xF1); // DC/DC
}
ssd1306_command(SSD1306_SETCOMPINS); // 0xDA
ssd1306_command(0x12); // disable COM left/right remap
ssd1306_command(SSD1306_SETVCOMDETECT); // 0xDB
ssd1306_command(0x40); // 0x20 is default?
ssd1306_command(SSD1306_MEMORYMODE); // 0x20
ssd1306_command(0x00); // 0x0 act like ks0108
// left to right scan
ssd1306_command(SSD1306_SEGREMAP | 0x1);
ssd1306_command(SSD1306_COMSCANDEC);
ssd1306_command(SSD1306_CHARGEPUMP); //0x8D
if (vccstate == SSD1306_EXTERNALVCC) {
ssd1306_command(0x10); // disable
} else {
ssd1306_command(0x14); // disable
}
ssd1306_command(SSD1306_DISPLAYON);//--turn on oled panel
}
void SSD1306::invert(uint8_t i) {
if (i) {
ssd1306_command(SSD1306_INVERTDISPLAY);
} else {
ssd1306_command(SSD1306_NORMALDISPLAY);
}
}
inline void SSD1306::spiwrite(uint8_t c) {
shiftOut(sid, sclk, MSBFIRST, c);
}
void SSD1306::ssd1306_command(uint8_t c) {
digitalWrite(cs, HIGH);
digitalWrite(dc, LOW);
digitalWrite(cs, LOW);
spiwrite(c);
digitalWrite(cs, HIGH);
}
void SSD1306::ssd1306_data(uint8_t c) {
digitalWrite(cs, HIGH);
digitalWrite(dc, HIGH);
digitalWrite(cs, LOW);
spiwrite(c);
digitalWrite(cs, HIGH);
}
void SSD1306::ssd1306_set_brightness(uint8_t val) {
}
void SSD1306::display(void) {
ssd1306_command(SSD1306_SETLOWCOLUMN | 0x0); // low col = 0
ssd1306_command(SSD1306_SETHIGHCOLUMN | 0x0); // hi col = 0
ssd1306_command(SSD1306_SETSTARTLINE | 0x0); // line #0
for (uint16_t i=0; i<1024; i++) {
ssd1306_data(buffer[i]);
}
}
// clear everything
void SSD1306::clear(void) {
memset(buffer, 0, 1024);
}
void SSD1306::clear_display(void) {
}
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