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oled-display/lcd.c

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/*
* This file is part of lcd library for ssd1306/ssd1309/sh1106 oled-display.
*
* lcd library for ssd1306/ssd1309/sh1106 oled-display is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or any later version.
*
* lcd library for ssd1306/ssd1309/sh1106 oled-display is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Foobar. If not, see <http://www.gnu.org/licenses/>.
*
* Diese Datei ist Teil von lcd library for ssd1306/ssd1309/sh1106 oled-display.
*
* lcd library for ssd1306/ssd1309/sh1106 oled-display ist Freie Software: Sie können es unter den Bedingungen
* der GNU General Public License, wie von der Free Software Foundation,
* Version 3 der Lizenz oder jeder späteren
* veröffentlichten Version, weiterverbreiten und/oder modifizieren.
*
* lcd library for ssd1306/ssd1309/sh1106 oled-display wird in der Hoffnung, dass es nützlich sein wird, aber
* OHNE JEDE GEWÄHRLEISTUNG, bereitgestellt; sogar ohne die implizite
* Gewährleistung der MARKTFÄHIGKEIT oder EIGNUNG FÜR EINEN BESTIMMTEN ZWECK.
* Siehe die GNU General Public License für weitere Details.
*
* Sie sollten eine Kopie der GNU General Public License zusammen mit diesem
* Programm erhalten haben. Wenn nicht, siehe <http://www.gnu.org/licenses/>.
*
* lcd.h
*
* Created by Michael Köhler on 22.12.16.
* Copyright 2016 Skie-Systems. All rights reserved.
*
* lib for OLED-Display with ssd1306/ssd1309/sh1106-Controller
* first dev-version only for I2C-Connection
* at ATMega328P like Arduino Uno
*
* at GRAPHICMODE lib needs static SRAM for display:
* DISPLAY-WIDTH * DISPLAY-HEIGHT + 2 bytes
*
* at TEXTMODE lib need static SRAM for display:
* 2 bytes (cursorPosition)
*/
#include "lcd.h"
#include "font.h"
#include <string.h>
#if defined SPI
#include <util/delay.h>
#endif
static struct {
uint8_t x;
uint8_t y;
} cursorPosition;
static uint8_t charMode = NORMALSIZE;
#if defined GRAPHICMODE
#include <stdlib.h>
static uint8_t displayBuffer[DISPLAY_HEIGHT/8][DISPLAY_WIDTH];
#elif defined TEXTMODE
#else
#error "No valid displaymode! Refer lcd.h"
#endif
const uint8_t init_sequence [] PROGMEM = { // Initialization Sequence
LCD_DISP_OFF, // Display OFF (sleep mode)
0x20, 0b00, // Set Memory Addressing Mode
// 00=Horizontal Addressing Mode; 01=Vertical Addressing Mode;
// 10=Page Addressing Mode (RESET); 11=Invalid
0xB0, // Set Page Start Address for Page Addressing Mode, 0-7
0xC8, // Set COM Output Scan Direction
0x00, // --set low column address
0x10, // --set high column address
0x40, // --set start line address
0x81, 0x3F, // Set contrast control register
0xA1, // Set Segment Re-map. A0=address mapped; A1=address 127 mapped.
0xA6, // Set display mode. A6=Normal; A7=Inverse
0xA8, DISPLAY_HEIGHT-1, // Set multiplex ratio(1 to 64)
0xA4, // Output RAM to Display
// 0xA4=Output follows RAM content; 0xA5,Output ignores RAM content
0xD3, 0x00, // Set display offset. 00 = no offset
0xD5, // --set display clock divide ratio/oscillator frequency
0xF0, // --set divide ratio
0xD9, 0x22, // Set pre-charge period
// Set com pins hardware configuration
#if DISPLAY_HEIGHT==64
0xDA, 0x12,
#elif DISPLAY_HEIGHT==32
0xDA, 0x02,
#endif
0xDB, // --set vcomh
0x20, // 0x20,0.77xVcc
0x8D, 0x14, // Set DC-DC enable
};
#pragma mark LCD COMMUNICATION
void lcd_command(uint8_t cmd[], uint8_t size) {
#if defined I2C
i2c_start((LCD_I2C_ADR << 1) | 0);
i2c_byte(0x00); // 0x00 for command, 0x40 for data
for (uint8_t i=0; i<size; i++) {
i2c_byte(cmd[i]);
}
i2c_stop();
#elif defined SPI
LCD_PORT &= ~(1 << CS_PIN);
LCD_PORT &= ~(1 << DC_PIN);
for (uint8_t i=0; i<size; i++) {
SPDR = cmd[i];
while(!(SPSR & (1<<SPIF)));
}
LCD_PORT |= (1 << CS_PIN);
#endif
}
void lcd_data(uint8_t data[], uint16_t size) {
#if defined I2C
i2c_start((LCD_I2C_ADR << 1) | 0);
i2c_byte(0x40); // 0x00 for command, 0x40 for data
for (uint16_t i = 0; i<size; i++) {
i2c_byte(data[i]);
}
i2c_stop();
#elif defined SPI
LCD_PORT &= ~(1 << CS_PIN);
LCD_PORT |= (1 << DC_PIN);
for (uint16_t i = 0; i<size; i++) {
SPDR = data[i];
while(!(SPSR & (1<<SPIF)));
}
LCD_PORT |= (1 << CS_PIN);
#endif
}
#pragma mark -
#pragma mark GENERAL FUNCTIONS
void lcd_init(uint8_t dispAttr){
#if defined I2C
i2c_init();
#elif defined SPI
DDRB |= (1 << PB2)|(1 << PB3)|(1 << PB5);
SPCR = (1 << SPE)|(1<<MSTR)|(1<<SPR0);
LCD_DDR |= (1 << CS_PIN)|(1 << DC_PIN)|(1 << RES_PIN);
LCD_PORT |= (1 << CS_PIN)|(1 << DC_PIN)|(1 << RES_PIN);
LCD_PORT &= ~(1 << RES_PIN);
_delay_ms(10);
LCD_PORT |= (1 << RES_PIN);
#endif
uint8_t commandSequence[sizeof(init_sequence)+1];
for (uint8_t i = 0; i < sizeof (init_sequence); i++) {
commandSequence[i] = (pgm_read_byte(&init_sequence[i]));
}
commandSequence[sizeof(init_sequence)]=(dispAttr);
lcd_command(commandSequence, sizeof(commandSequence));
lcd_clrscr();
}
void lcd_gotoxy(uint8_t x, uint8_t y){
x = x * sizeof(FONT[0]);
lcd_goto_xpix_y(x,y);
}
void lcd_goto_xpix_y(uint8_t x, uint8_t y){
if( x > (DISPLAY_WIDTH) || y > (DISPLAY_HEIGHT/8-1)) return;// out of display
cursorPosition.x=x;
cursorPosition.y=y;
#if defined (SSD1306) || defined (SSD1309)
uint8_t commandSequence[] = {0xb0+y, 0x21, x, 0x7f};
#elif defined SH1106
uint8_t commandSequence[] = {0xb0+y, 0x21, 0x00+((2+x) & (0x0f)), 0x10+( ((2+x) & (0xf0)) >> 4 ), 0x7f};
#endif
lcd_command(commandSequence, sizeof(commandSequence));
}
void lcd_clrscr(void){
#ifdef GRAPHICMODE
for (uint8_t i = 0; i < DISPLAY_HEIGHT/8; i++){
memset(displayBuffer[i], 0x00, sizeof(displayBuffer[i]));
lcd_gotoxy(0,i);
lcd_data(displayBuffer[i], sizeof(displayBuffer[i]));
}
#elif defined TEXTMODE
uint8_t displayBuffer[DISPLAY_WIDTH];
memset(displayBuffer, 0x00, sizeof(displayBuffer));
for (uint8_t i = 0; i < DISPLAY_HEIGHT/8; i++){
lcd_gotoxy(0,i);
lcd_data(displayBuffer, sizeof(displayBuffer));
}
#endif
lcd_home();
}
void lcd_home(void){
lcd_gotoxy(0, 0);
}
void lcd_invert(uint8_t invert){
uint8_t commandSequence[1];
if (invert != YES) {
commandSequence[0] = 0xA6;
} else {
commandSequence[0] = 0xA7;
}
lcd_command(commandSequence, 1);
}
void lcd_sleep(uint8_t sleep){
uint8_t commandSequence[1];
if (sleep != YES) {
commandSequence[0] = 0xAF;
} else {
commandSequence[0] = 0xAE;
}
lcd_command(commandSequence, 1);
}
void lcd_set_contrast(uint8_t contrast){
uint8_t commandSequence[2] = {0x81, contrast};
lcd_command(commandSequence, sizeof(commandSequence));
}
void lcd_putc(char c){
switch (c) {
case '\b':
// backspace
lcd_gotoxy(cursorPosition.x-charMode, cursorPosition.y);
lcd_putc(' ');
lcd_gotoxy(cursorPosition.x-charMode, cursorPosition.y);
break;
case '\t':
// tab
if( (cursorPosition.x+charMode*4) < (DISPLAY_WIDTH/ sizeof(FONT[0])-charMode*4) ){
lcd_gotoxy(cursorPosition.x+charMode*4, cursorPosition.y);
}else{
lcd_gotoxy(DISPLAY_WIDTH/ sizeof(FONT[0]), cursorPosition.y);
}
break;
case '\n':
// linefeed
if(cursorPosition.y < (DISPLAY_HEIGHT/8-1)){
lcd_gotoxy(cursorPosition.x, cursorPosition.y+charMode);
}
break;
case '\r':
// carrige return
lcd_gotoxy(0, cursorPosition.y);
break;
default:
// char doesn't fit in line
if( (cursorPosition.x >= DISPLAY_WIDTH-sizeof(FONT[0])) || (c < ' ') ) break;
// mapping char
c -= ' ';
if (c >= pgm_read_byte(&special_char[0][1]) ) {
char temp = c;
c = 0xff;
for (uint8_t i=0; pgm_read_byte(&special_char[i][1]) != 0xff; i++) {
if ( pgm_read_byte(&special_char[i][0])-' ' == temp ) {
c = pgm_read_byte(&special_char[i][1]);
break;
}
}
if ( c == 0xff ) break;
}
// print char at display
#ifdef GRAPHICMODE
if (charMode == DOUBLESIZE) {
uint16_t doubleChar[sizeof(FONT[0])];
uint8_t dChar;
if ((cursorPosition.x+2*sizeof(FONT[0]))>DISPLAY_WIDTH) break;
for (uint8_t i=0; i < sizeof(FONT[0]); i++) {
doubleChar[i] = 0;
dChar = pgm_read_byte(&(FONT[(uint8_t)c][i]));
for (uint8_t j=0; j<8; j++) {
if ((dChar & (1 << j))) {
doubleChar[i] |= (1 << (j*2));
doubleChar[i] |= (1 << ((j*2)+1));
}
}
}
for (uint8_t i = 0; i < sizeof(FONT[0]); i++)
{
// load bit-pattern from flash
displayBuffer[cursorPosition.y+1][cursorPosition.x+(2*i)] = doubleChar[i] >> 8;
displayBuffer[cursorPosition.y+1][cursorPosition.x+(2*i)+1] = doubleChar[i] >> 8;
displayBuffer[cursorPosition.y][cursorPosition.x+(2*i)] = doubleChar[i] & 0xff;
displayBuffer[cursorPosition.y][cursorPosition.x+(2*i)+1] = doubleChar[i] & 0xff;
}
cursorPosition.x += sizeof(FONT[0])*2;
} else {
if ((cursorPosition.x+sizeof(FONT[0]))>DISPLAY_WIDTH) break;
for (uint8_t i = 0; i < sizeof(FONT[0]); i++)
{
// load bit-pattern from flash
displayBuffer[cursorPosition.y][cursorPosition.x+i] =pgm_read_byte(&(FONT[(uint8_t)c][i]));
}
cursorPosition.x += sizeof(FONT[0]);
}
#elif defined TEXTMODE
if (charMode == DOUBLESIZE) {
uint16_t doubleChar[sizeof(FONT[0])];
uint8_t dChar;
if ((cursorPosition.x+2*sizeof(FONT[0]))>DISPLAY_WIDTH) break;
for (uint8_t i=0; i < sizeof(FONT[0]); i++) {
doubleChar[i] = 0;
dChar = pgm_read_byte(&(FONT[(uint8_t)c][i]));
for (uint8_t j=0; j<8; j++) {
if ((dChar & (1 << j))) {
doubleChar[i] |= (1 << (j*2));
doubleChar[i] |= (1 << ((j*2)+1));
}
}
}
uint8_t data[sizeof(FONT[0])*2];
for (uint8_t i = 0; i < sizeof(FONT[0]); i++)
{
// print font to ram, print 6 columns
data[i<<1]=(doubleChar[i] & 0xff);
data[(i<<1)+1]=(doubleChar[i] & 0xff);
}
lcd_data(data, sizeof(FONT[0])*2);
#if defined (SSD1306) || defined (SSD1309)
uint8_t commandSequence[] = {0xb0+cursorPosition.y+1,
0x21,
cursorPosition.x,
0x7f};
#elif defined SH1106
uint8_t commandSequence[] = {0xb0+cursorPosition.y+1,
0x21,
0x00+((2+cursorPosition.x) & (0x0f)),
0x10+( ((2+cursorPosition.x) & (0xf0)) >> 4 ),
0x7f};
#endif
lcd_command(commandSequence, sizeof(commandSequence));
for (uint8_t i = 0; i < sizeof(FONT[0]); i++)
{
// print font to ram, print 6 columns
data[i<<1]=(doubleChar[i] >> 8);
data[(i<<1)+1]=(doubleChar[i] >> 8);
}
lcd_data(data, sizeof(FONT[0])*2);
commandSequence[0] = 0xb0+cursorPosition.y;
#if defined (SSD1306) || defined (SSD1309)
commandSequence[2] = cursorPosition.x+(2*sizeof(FONT[0]));
#elif defined SH1106
commandSequence[2] = 0x00+((2+cursorPosition.x+(2*sizeof(FONT[0]))) & (0x0f));
commandSequence[3] = 0x10+( ((2+cursorPosition.x+(2*sizeof(FONT[0]))) & (0xf0)) >> 4 );
#endif
lcd_command(commandSequence, sizeof(commandSequence));
cursorPosition.x += sizeof(FONT[0])*2;
} else {
uint8_t data[sizeof(FONT[0])];
if ((cursorPosition.x+sizeof(FONT[0]))>DISPLAY_WIDTH) break;
for (uint8_t i = 0; i < sizeof(FONT[0]); i++)
{
// print font to ram, print 6 columns
data[i]=(pgm_read_byte(&(FONT[(uint8_t)c][i])));
}
lcd_data(data, sizeof(FONT[0]));
cursorPosition.x += sizeof(FONT[0]);
}
#endif
break;
}
}
void lcd_charMode(uint8_t mode){
charMode = mode;
}
void lcd_puts(const char* s){
while (*s) {
lcd_putc(*s++);
}
}
void lcd_puts_p(const char* progmem_s){
register uint8_t c;
while ((c = pgm_read_byte(progmem_s++))) {
lcd_putc(c);
}
}
#ifdef GRAPHICMODE
#pragma mark -
#pragma mark GRAPHIC FUNCTIONS
uint8_t lcd_drawPixel(uint8_t x, uint8_t y, uint8_t color){
if( x > DISPLAY_WIDTH-1 || y > (DISPLAY_HEIGHT-1)) return 1; // out of Display
if( color == WHITE){
displayBuffer[(y / 8)][x] |= (1 << (y % 8));
} else {
displayBuffer[(y / 8)][x] &= ~(1 << (y % 8));
}
return 0;
}
uint8_t lcd_drawLine(uint8_t x1, uint8_t y1, uint8_t x2, uint8_t y2, uint8_t color){
uint8_t result;
int dx = abs(x2-x1), sx = x1<x2 ? 1 : -1;
int dy = -abs(y2-y1), sy = y1<y2 ? 1 : -1;
int err = dx+dy, e2; /* error value e_xy */
while(1){
result = lcd_drawPixel(x1, y1, color);
if (x1==x2 && y1==y2) break;
e2 = 2*err;
if (e2 > dy) { err += dy; x1 += sx; } /* e_xy+e_x > 0 */
if (e2 < dx) { err += dx; y1 += sy; } /* e_xy+e_y < 0 */
}
return result;
}
uint8_t lcd_drawRect(uint8_t px1, uint8_t py1, uint8_t px2, uint8_t py2, uint8_t color){
uint8_t result;
result = lcd_drawLine(px1, py1, px2, py1, color);
result = lcd_drawLine(px2, py1, px2, py2, color);
result = lcd_drawLine(px2, py2, px1, py2, color);
result = lcd_drawLine(px1, py2, px1, py1, color);
return result;
}
uint8_t lcd_fillRect(uint8_t px1, uint8_t py1, uint8_t px2, uint8_t py2, uint8_t color){
uint8_t result;
if( px1 > px2){
uint8_t temp = px1;
px1 = px2;
px2 = temp;
temp = py1;
py1 = py2;
py2 = temp;
}
for (uint8_t i=0; i<=(py2-py1); i++){
result = lcd_drawLine(px1, py1+i, px2, py1+i, color);
}
return result;
}
uint8_t lcd_drawCircle(uint8_t center_x, uint8_t center_y, uint8_t radius, uint8_t color){
uint8_t result;
int16_t f = 1 - radius;
int16_t ddF_x = 1;
int16_t ddF_y = -2 * radius;
int16_t x = 0;
int16_t y = radius;
result = lcd_drawPixel(center_x , center_y+radius, color);
result = lcd_drawPixel(center_x , center_y-radius, color);
result = lcd_drawPixel(center_x+radius, center_y , color);
result = lcd_drawPixel(center_x-radius, center_y , color);
while (x<y) {
if (f >= 0) {
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
result = lcd_drawPixel(center_x + x, center_y + y, color);
result = lcd_drawPixel(center_x - x, center_y + y, color);
result = lcd_drawPixel(center_x + x, center_y - y, color);
result = lcd_drawPixel(center_x - x, center_y - y, color);
result = lcd_drawPixel(center_x + y, center_y + x, color);
result = lcd_drawPixel(center_x - y, center_y + x, color);
result = lcd_drawPixel(center_x + y, center_y - x, color);
result = lcd_drawPixel(center_x - y, center_y - x, color);
}
return result;
}
uint8_t lcd_fillCircle(uint8_t center_x, uint8_t center_y, uint8_t radius, uint8_t color) {
uint8_t result;
for(uint8_t i=0; i<= radius;i++){
result = lcd_drawCircle(center_x, center_y, i, color);
}
return result;
}
uint8_t lcd_drawBitmap(uint8_t x, uint8_t y, const uint8_t *picture, uint8_t width, uint8_t height, uint8_t color){
uint8_t result,i,j, byteWidth = (width+7)/8;
for (j = 0; j < height; j++) {
for(i=0; i < width;i++){
if(pgm_read_byte(picture + j * byteWidth + i / 8) & (128 >> (i & 7))){
result = lcd_drawPixel(x+i, y+j, color);
} else {
result = lcd_drawPixel(x+i, y+j, !color);
}
}
}
return result;
}
void lcd_display() {
#if defined (SSD1306) || defined (SSD1309)
lcd_gotoxy(0,0);
lcd_data(&displayBuffer[0][0], DISPLAY_WIDTH*DISPLAY_HEIGHT/8);
#elif defined SH1106
for (uint8_t i = 0; i < DISPLAY_HEIGHT/8; i++){
lcd_gotoxy(0,i);
lcd_data(displayBuffer[i], sizeof(displayBuffer[i]));
}
#endif
}
void lcd_clear_buffer() {
for (uint8_t i = 0; i < DISPLAY_HEIGHT/8; i++){
memset(displayBuffer[i], 0x00, sizeof(displayBuffer[i]));
}
}
uint8_t lcd_check_buffer(uint8_t x, uint8_t y) {
if( x > DISPLAY_WIDTH-1 || y > (DISPLAY_HEIGHT-1)) return 0; // out of Display
return displayBuffer[(y / (DISPLAY_HEIGHT/8))][x] & (1 << (y % (DISPLAY_HEIGHT/8)));
}
void lcd_display_block(uint8_t x, uint8_t line, uint8_t width) {
if (line > (DISPLAY_HEIGHT/8-1) || x > DISPLAY_WIDTH - 1){return;}
if (x + width > DISPLAY_WIDTH) { // no -1 here, x alone is width 1
width = DISPLAY_WIDTH - x;
}
lcd_goto_xpix_y(x,line);
lcd_data(&displayBuffer[line][x], width);
}
#endif
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