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/PIC Projects/PICX_27J13/display_oled_ssd1306.c
0,0 → 1,835
#include <xc.h>
#include <delays.h>
#include <string.h>
#include <stdio.h>
#include "defines.h"
#include "base_SPI.h"
#include "display_oled_ssd1306.h"
#include "glcdfont.c"
#include "base_UART.h"
 
static SSD1306_DATA *ssd1306_data_p;
 
// 512 (128x32) or 1024 (128x64) bytes allocated for LCD buffer
// See linker file for details
static char LCD_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, 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,
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 (SSD1306_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
};
 
int SSD1306_Abs(int i) {
if (i < 0)
return -i;
else
return i;
}
 
void SSD1306_Swap(int *a, int *b) {
int tmp = *a;
*a = *b;
*b = tmp;
}
 
void SSD1306_Init(SSD1306_DATA *data) {
ssd1306_data_p = data;
ssd1306_data_p->_width = ssd1306_data_p->WIDTH = SSD1306_LCDWIDTH;
ssd1306_data_p->_height = ssd1306_data_p->HEIGHT = SSD1306_LCDHEIGHT;
ssd1306_data_p->rotation = 0;
ssd1306_data_p->cursor_x = ssd1306_data_p->cursor_y = 0;
ssd1306_data_p->textsize = 1;
ssd1306_data_p->textcolor = SSD1306_WHITE;
ssd1306_data_p->textbgcolor = SSD1306_BLACK;
ssd1306_data_p->wrap = 1;
}
 
void SSD1306_Begin(char vccstate) {
// Toggle reset pin
SPI_RESET_LAT = 0;
Delay10KTCYx(1);
SPI_RESET_LAT = 1;
 
#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
 
SSD1306_Command(SSD1306_DISPLAYON); // Turn on OLED panel
}
 
void SSD1306_Command(char cmd) {
char c = cmd;
SPI_DC_SELECT_LAT = 0; // D/C low (cmd)
SPI2_Write(&c, 1);
}
 
void SSD1306_Data(char data) {
char c = data;
SPI_DC_SELECT_LAT = 1; // D/C high (data)
SPI2_Write(&c, 1);
}
 
void SSD1306_Clear_Display() {
memset(LCD_BUFFER, 0, (SSD1306_LCDWIDTH * SSD1306_LCDHEIGHT / 8));
}
 
void SSD1306_Invert_Display(char c) {
if (c) {
SSD1306_Command(SSD1306_INVERTDISPLAY);
} else {
SSD1306_Command((SSD1306_NORMALDISPLAY));
}
}
 
void SSD1306_Display() {
SSD1306_Command(SSD1306_SETLOWCOLUMN | 0x0); // low col = 0
SSD1306_Command(SSD1306_SETHIGHCOLUMN | 0x0); // hi col = 0
SSD1306_Command(SSD1306_SETSTARTLINE | 0x0); // line #0
 
SPI_DC_SELECT_LAT = 1; // D/C high (data)
SPI2_Write(LCD_BUFFER, SSD1306_LCDWIDTH * SSD1306_LCDHEIGHT / 8);
 
// if (SSD1306_LCDHEIGHT == 32) {
// SPI2_Write_Repeat(0, SSD1306_LCDWIDTH * SSD1306_LCDHEIGHT / 8);
// }
}
 
void SSD1306_Draw_Pixel(int x, int y, unsigned int color) {
if ((x < 0) || (x >= ssd1306_data_p->_width) || (y < 0) || (y >= ssd1306_data_p->_height))
return;
 
// check rotation, move pixel around if necessary
switch (ssd1306_data_p->rotation) {
case 1:
SSD1306_Swap(&x, &y);
x = SSD1306_LCDWIDTH - x - 1;
break;
case 2:
x = SSD1306_LCDWIDTH - x - 1;
y = SSD1306_LCDHEIGHT - y - 1;
break;
case 3:
SSD1306_Swap(&x, &y);
y = SSD1306_LCDHEIGHT - y - 1;
break;
default:
break;
}
 
// Need to do this for some reason since x + (y / 8) * SSD1306_LCDWIDTH returns -128?!
// TODO: Change this back when they fix the compiler
int loc = (y / 8) * SSD1306_LCDWIDTH;
loc += x;
// x is which column
if (color == SSD1306_WHITE) {
LCD_BUFFER[loc] |= 1<<(y % 8);
} else {
LCD_BUFFER[loc] &= ~(1<<(y % 8));
}
}
 
void SSD1306_Draw_Line(int x0, int y0, int x1, int y1, unsigned int color) {
int dx, dy, err, ystep;
int steep = SSD1306_Abs(y1 - y0) > SSD1306_Abs(x1 - x0);
if (steep) {
SSD1306_Swap(&x0, &y0);
SSD1306_Swap(&x1, &y1);
}
 
if (x0 > x1) {
SSD1306_Swap(&x0, &x1);
SSD1306_Swap(&y0, &y1);
}
 
dx = x1 - x0;
dy = SSD1306_Abs(y1 - y0);
 
err = dx / 2;
 
if (y0 < y1) {
ystep = 1;
} else {
ystep = -1;
}
 
for (; x0 <= x1; x0++) {
 
if (steep) {
SSD1306_Draw_Pixel(y0, x0, color);
} else {
SSD1306_Draw_Pixel(x0, y0, color);
}
err -= dy;
if (err < 0) {
y0 += ystep;
err += dx;
}
}
}
 
void SSD1306_Draw_Fast_VLine(int x, int y, int h, unsigned int color) {
SSD1306_Draw_Line(x, y, x, y + h - 1, color);
}
 
void SSD1306_Draw_Fast_HLine(int x, int y, int w, unsigned int color) {
SSD1306_Draw_Line(x, y, x + w - 1, y, color);
}
 
void SSD1306_Draw_Rect(int x, int y, int w, int h, unsigned int color) {
SSD1306_Draw_Fast_HLine(x, y, w, color);
SSD1306_Draw_Fast_HLine(x, y + h, w, color);
SSD1306_Draw_Fast_VLine(x, y, h, color);
SSD1306_Draw_Fast_VLine(x + w, y, h, color);
}
 
void SSD1306_Fill_Rect(int x, int y, int w, int h, unsigned int color) {
int i;
for (i = x; i < x + w; i++) {
SSD1306_Draw_Fast_VLine(i, y, h, color);
}
}
 
void SSD1306_Draw_Circle(int x0, int y0, int r, unsigned int color) {
int f = 1 - r;
int ddF_x = 1;
int ddF_y = -2 * r;
int x = 0;
int y = r;
 
SSD1306_Draw_Pixel(x0, y0 + r, color);
SSD1306_Draw_Pixel(x0, y0 - r, color);
SSD1306_Draw_Pixel(x0 + r, y0, color);
SSD1306_Draw_Pixel(x0 - r, y0, color);
 
while (x < y) {
if (f >= 0) {
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
 
SSD1306_Draw_Pixel(x0 + x, y0 + y, color);
SSD1306_Draw_Pixel(x0 - x, y0 + y, color);
SSD1306_Draw_Pixel(x0 + x, y0 - y, color);
SSD1306_Draw_Pixel(x0 - x, y0 - y, color);
SSD1306_Draw_Pixel(x0 + y, y0 + x, color);
SSD1306_Draw_Pixel(x0 - y, y0 + x, color);
SSD1306_Draw_Pixel(x0 + y, y0 - x, color);
SSD1306_Draw_Pixel(x0 - y, y0 - x, color);
}
}
 
void SSD1306_Draw_Circle_Helper(int x0, int y0, int r, char cornername, unsigned int color) {
int f = 1 - r;
int ddF_x = 1;
int ddF_y = -2 * r;
int x = 0;
int y = r;
 
while (x < y) {
if (f >= 0) {
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
if (cornername & 0x4) {
SSD1306_Draw_Pixel(x0 + x, y0 + y, color);
SSD1306_Draw_Pixel(x0 + y, y0 + x, color);
}
if (cornername & 0x2) {
SSD1306_Draw_Pixel(x0 + x, y0 - y, color);
SSD1306_Draw_Pixel(x0 + y, y0 - x, color);
}
if (cornername & 0x8) {
SSD1306_Draw_Pixel(x0 - y, y0 + x, color);
SSD1306_Draw_Pixel(x0 - x, y0 + y, color);
}
if (cornername & 0x1) {
SSD1306_Draw_Pixel(x0 - y, y0 - x, color);
SSD1306_Draw_Pixel(x0 - x, y0 - y, color);
}
}
}
 
void SSD1306_Fill_Circle(int x0, int y0, int r, unsigned int color) {
SSD1306_Draw_Fast_VLine(x0, y0 - r, 2 * r + 1, color);
SSD1306_Fill_Circle_Helper(x0, y0, r, 3, 0, color);
}
 
void SSD1306_Fill_Circle_Helper(int x0, int y0, int r, char cornername, int delta, unsigned int color) {
int f = 1 - r;
int ddF_x = 1;
int ddF_y = -2 * r;
int x = 0;
int y = r;
 
while (x < y) {
if (f >= 0) {
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
 
if (cornername & 0x1) {
SSD1306_Draw_Fast_VLine(x0 + x, y0 - y, 2 * y + 1 + delta, color);
SSD1306_Draw_Fast_VLine(x0 + y, y0 - x, 2 * x + 1 + delta, color);
}
if (cornername & 0x2) {
SSD1306_Draw_Fast_VLine(x0 - x, y0 - y, 2 * y + 1 + delta, color);
SSD1306_Draw_Fast_VLine(x0 - y, y0 - x, 2 * x + 1 + delta, color);
}
}
}
 
void SSD1306_Draw_Triangle(int x0, int y0, int x1, int y1, int x2, int y2, unsigned int color) {
SSD1306_Draw_Line(x0, y0, x1, y1, color);
SSD1306_Draw_Line(x1, y1, x2, y2, color);
SSD1306_Draw_Line(x2, y2, x0, y0, color);
}
 
void SSD1306_Fill_Triangle(int x0, int y0, int x1, int y1, int x2, int y2, unsigned int color) {
int a, b, y, last;
int dx01 = x1 - x0;
int dy01 = y1 - y0;
int dx02 = x2 - x0;
int dy02 = y2 - y0;
int dx12 = x2 - x1;
int dy12 = y2 - y1;
int sa = 0;
int sb = 0;
 
// Sort coordinates by Y order (y2 >= y1 >= y0)
if (y0 > y1) {
SSD1306_Swap(&y0, &y1);
SSD1306_Swap(&x0, &x1);
}
if (y1 > y2) {
SSD1306_Swap(&y2, &y1);
SSD1306_Swap(&x2, &x1);
}
if (y0 > y1) {
SSD1306_Swap(&y0, &y1);
SSD1306_Swap(&x0, &x1);
}
 
if (y0 == y2) { // Handle awkward all-on-same-line case as its own thing
a = b = x0;
if (x1 < a) a = x1;
else if (x1 > b) b = x1;
if (x2 < a) a = x2;
else if (x2 > b) b = x2;
SSD1306_Draw_Fast_HLine(a, y0, b - a + 1, color);
return;
}
 
// For upper part of triangle, find scanline crossings for segments
// 0-1 and 0-2. If y1=y2 (flat-bottomed triangle), the scanline y1
// is included here (and second loop will be skipped, avoiding a /0
// error there), otherwise scanline y1 is skipped here and handled
// in the second loop...which also avoids a /0 error here if y0=y1
// (flat-topped triangle).
if (y1 == y2) last = y1; // Include y1 scanline
else last = y1 - 1; // Skip it
 
for (y = y0; y <= last; y++) {
a = x0 + sa / dy01;
b = x0 + sb / dy02;
sa += dx01;
sb += dx02;
/* longhand:
a = x0 + (x1 - x0) * (y - y0) / (y1 - y0);
b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
*/
if (a > b) SSD1306_Swap(&a, &b);
SSD1306_Draw_Fast_HLine(a, y, b - a + 1, color);
}
 
// For lower part of triangle, find scanline crossings for segments
// 0-2 and 1-2. This loop is skipped if y1=y2.
sa = dx12 * (y - y1);
sb = dx02 * (y - y0);
for (; y <= y2; y++) {
a = x1 + sa / dy12;
b = x0 + sb / dy02;
sa += dx12;
sb += dx02;
/* longhand:
a = x1 + (x2 - x1) * (y - y1) / (y2 - y1);
b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
*/
if (a > b) SSD1306_Swap(&a, &b);
SSD1306_Draw_Fast_HLine(a, y, b - a + 1, color);
}
}
 
void SSD1306_Draw_Round_Rect(int x, int y, int w, int h, int r, unsigned int color) {
// smarter version
SSD1306_Draw_Fast_HLine(x + r, y, w - 2 * r, color); // Top
SSD1306_Draw_Fast_HLine(x + r, y + h - 1, w - 2 * r, color); // Bottom
SSD1306_Draw_Fast_VLine(x, y + r, h - 2 * r, color); // Left
SSD1306_Draw_Fast_VLine(x + w - 1, y + r, h - 2 * r, color); // Right
 
// draw four corners
SSD1306_Draw_Circle_Helper(x + r, y + r, r, 1, color);
SSD1306_Draw_Circle_Helper(x + w - r - 1, y + r, r, 2, color);
SSD1306_Draw_Circle_Helper(x + w - r - 1, y + h - r - 1, r, 4, color);
SSD1306_Draw_Circle_Helper(x + r, y + h - r - 1, r, 8, color);
}
 
void SSD1306_Fill_Round_Rect(int x, int y, int w, int h, int r, unsigned int color) {
// smarter version
SSD1306_Fill_Rect(x + r, y, w - 2 * r, h, color);
 
// draw four corners
SSD1306_Fill_Circle_Helper(x + w - r - 1, y + r, r, 1, h - 2 * r - 1, color);
SSD1306_Fill_Circle_Helper(x + r, y + r, r, 2, h - 2 * r - 1, color);
}
 
void SSD1306_Draw_Bitmap(int x, int y, const char* bitmap, int w, int h, unsigned int color) {
int i, j;
for (j = 0; j < h; j++) {
for (i = 0; i < w; i++) {
if (bitmap[i + (j / 8) * w] & (j % 8)) {
SSD1306_Draw_Pixel(x + i, y + j, color);
}
}
}
}
 
void SSD1306_Draw_Char(int x, int y, char c, unsigned int color, unsigned int bg, char size) {
int i, j;
unsigned int line;
 
if ((x >= ssd1306_data_p->_width) || // Clip right
(y >= ssd1306_data_p->_height) || // Clip bottom
((x + 5 * size - 1) < 0) || // Clip left
((y + 8 * size - 1) < 0)) // Clip top
return;
 
for (i = 0; i < 6; i++) {
if (i == 5)
line = 0x0;
else
line = font[(c * 5) + i];
for (j = 0; j < 8; j++) {
if (line & 0x1) {
if (size == 1) {// default size
SSD1306_Draw_Pixel(x + i, y + j, color);
} else { // big size
SSD1306_Fill_Rect(x + (i * size), y + (j * size), size, size, color);
}
} else if (bg != color) {
if (size == 1) { // default size
SSD1306_Draw_Pixel(x + i, y + j, bg);
} else { // big size
SSD1306_Fill_Rect(x + i*size, y + j*size, size, size, bg);
}
}
line >>= 1;
}
}
}
 
void SSD1306_Write(char c) {
if (c == '\n' || c == '\r') {
ssd1306_data_p->cursor_y += ssd1306_data_p->textsize * 8;
ssd1306_data_p->cursor_x = 0;
// } else if (c == '\r') {
// // skip em
} else {
SSD1306_Draw_Char(ssd1306_data_p->cursor_x, ssd1306_data_p->cursor_y, c, ssd1306_data_p->textcolor, ssd1306_data_p->textbgcolor, ssd1306_data_p->textsize);
ssd1306_data_p->cursor_x += ssd1306_data_p->textsize * 6;
if (ssd1306_data_p->wrap && (ssd1306_data_p->cursor_x > (ssd1306_data_p->_width - ssd1306_data_p->textsize * 6))) {
ssd1306_data_p->cursor_y += ssd1306_data_p->textsize * 8;
ssd1306_data_p->cursor_x = 0;
}
}
}
 
void SSD1306_Write_String(char* msg, char length) {
for (char i = 0; i < length; i++) {
SSD1306_Write(msg[i]);
}
}
 
//void SSD1306_Write_String(const rom char *fmt, ...) {
// char i, len;
// char buffer[SSD1306_STRING_BUFFER_SIZE];
//
// // Parse and create string
// va_list args;
// va_start(args, fmt);
// vsprintf((char *) buffer, fmt, args);
// va_end(args);
// len = strlen((char *) buffer);
//
// // Make sure string to insert fits in buffer, truncate if necessary
// if (len > SSD1306_STRING_BUFFER_SIZE)
// len = SSD1306_STRING_BUFFER_SIZE;
//
// // Print buffer to string
// for (i = 0; i < len; i++) {
// SSD1306_Write(buffer[i]);
// }
//}
 
//void SSD1306_Append_String(const rom char *fmt, ...) {
// char i, len;
// char buffer[SSD1306_STRING_BUFFER_SIZE];
//
// // Parse and create string
// va_list args;
// va_start(args, fmt);
// vsprintf((char *) buffer, fmt, args);
// va_end(args);
//
// // Make sure string to insert fits in buffer, truncate if necessary
// len = strlen((char *) buffer);
//
// if (len == 1) { // This will only occur on "\n"
// // Do nothing?
// return;
// }
//
// if (len > SSD1306_STRING_BUFFER_SIZE)
// len = SSD1306_STRING_BUFFER_SIZE;
//
// // Omit the newline if string fill entire line
// if (((len - 1)%(ssd1306_data_p->_width / 6)) == 0) { // 16 or 10
// len -= 1;
// }
//
// // Shift everything right and insert string at beginning
// for (i = 127; i > len - 1; i--) {
// ssd1306_data_p->lcd_buffer[i] = ssd1306_data_p->lcd_buffer[i - len];
// }
// memcpy((char *)ssd1306_data_p->lcd_buffer, (const char *) buffer, len);
//
// // Print full buffer to screen
// SSD1306_Clear_Display();
// SSD1306_Display();
//
// SSD1306_Set_Cursor(0,0);
// for (i = 0; i < SSD1306_LCD_BUFFER_SIZE-1; i++) {
// SSD1306_Write(ssd1306_data_p->lcd_buffer[i]);
// }
//}
 
void SSD1306_Set_Cursor(int x, int y) {
ssd1306_data_p->cursor_x = x;
ssd1306_data_p->cursor_y = y;
}
 
void SSD1306_Set_Text_Color(unsigned int c) {
// for 'transparent' background, we'll set the bg
// to the same as fg instead of using a flag
ssd1306_data_p->textcolor = c;
ssd1306_data_p->textbgcolor = c;
}
 
void SSD1306_Set_Text_Color_BG(unsigned int c, unsigned int bg) {
ssd1306_data_p->textcolor = c;
ssd1306_data_p->textbgcolor = bg;
}
 
void SSD1306_Set_Text_Size(char s) {
ssd1306_data_p->textsize = (s > 0) ? s : 1;
}
 
void SSD1306_Set_Text_Wrap(char w) {
ssd1306_data_p->wrap = w;
}
 
void SSD1306_Set_Rotation(char x) {
x %= 4; // cant be higher than 3
ssd1306_data_p->rotation = x;
switch (x) {
case 0:
case 2:
ssd1306_data_p->_width = ssd1306_data_p->WIDTH;
ssd1306_data_p->_height = ssd1306_data_p->HEIGHT;
break;
case 1:
case 3:
ssd1306_data_p->_width = ssd1306_data_p->HEIGHT;
ssd1306_data_p->_height = ssd1306_data_p->WIDTH;
break;
}
}
 
 
 
void SSD1306_Test_DrawChar() {
char i;
SSD1306_Set_Text_Size(1);
SSD1306_Set_Text_Color(SSD1306_WHITE);
SSD1306_Set_Cursor(0, 0);
 
for (i = 0; i < 168; i++) {
if (i == '\n') continue;
SSD1306_Write(i);
// if ((i > 0) && (i % 21 == 0))
// SSD1306_write('\n');
}
SSD1306_Display();
}
 
void SSD1306_Test_DrawCircle() {
int i;
for (i = 0; i < ssd1306_data_p->_height; i += 2) {
SSD1306_Draw_Circle(ssd1306_data_p->_width / 2, ssd1306_data_p->_height / 2, i, SSD1306_WHITE);
SSD1306_Display();
}
}
 
void SSD1306_Test_DrawRect(void) {
int i;
for (i = 0; i < ssd1306_data_p->_height / 2; i += 2) {
SSD1306_Draw_Rect(i, i, ssd1306_data_p->_width - 2 * i, ssd1306_data_p->_height - 2 * i, SSD1306_WHITE);
SSD1306_Display();
}
}
 
void SSD1306_Test_FillRect(void) {
char color = 1;
int i;
for (i = 0; i < ssd1306_data_p->_height / 2; i += 3) {
// alternate colors
SSD1306_Fill_Rect(i, i, ssd1306_data_p->_width - i * 2, ssd1306_data_p->_height - i * 2, color % 2);
SSD1306_Display();
color++;
}
}
 
void SSD1306_Test_DrawTriangle(void) {
int i;
int min = ssd1306_data_p->_width < ssd1306_data_p->_height ? ssd1306_data_p->_width : ssd1306_data_p->_height;
for (i = 0; i < min / 2; i += 5) {
SSD1306_Draw_Triangle(ssd1306_data_p->_width / 2, ssd1306_data_p->_height / 2 - i,
ssd1306_data_p->_width / 2 - i, ssd1306_data_p->_height / 2 + i,
ssd1306_data_p->_width / 2 + i, ssd1306_data_p->_height / 2 + i, SSD1306_WHITE);
SSD1306_Display();
}
}
 
void SSD1306_Test_FillTriangle(void) {
char color = SSD1306_WHITE;
int i;
int min = ssd1306_data_p->_width < ssd1306_data_p->_height ? ssd1306_data_p->_width : ssd1306_data_p->_height;
for (i = min / 2; i > 0; i -= 5) {
SSD1306_Fill_Triangle(ssd1306_data_p->_width / 2, ssd1306_data_p->_height / 2 - i,
ssd1306_data_p->_width / 2 - i, ssd1306_data_p->_height / 2 + i,
ssd1306_data_p->_width / 2 + i, ssd1306_data_p->_height / 2 + i, SSD1306_WHITE);
if (color == SSD1306_WHITE) color = SSD1306_BLACK;
else color = SSD1306_WHITE;
SSD1306_Display();
}
}
 
void SSD1306_Test_DrawRoundRect(void) {
int i;
for (i = 0; i < ssd1306_data_p->_height / 2 - 2; i += 2) {
SSD1306_Draw_Round_Rect(i, i, ssd1306_data_p->_width - 2 * i, ssd1306_data_p->_height - 2 * i, ssd1306_data_p->_height / 4, SSD1306_WHITE);
SSD1306_Display();
}
}
 
void SSD1306_Test_FillRoundRect(void) {
char color = SSD1306_WHITE;
int i;
for (i = 0; i < ssd1306_data_p->_height / 2 - 2; i += 2) {
SSD1306_Fill_Round_Rect(i, i, ssd1306_data_p->_width - 2 * i, ssd1306_data_p->_height - 2 * i, ssd1306_data_p->_height / 4, color);
if (color == SSD1306_WHITE) color = SSD1306_BLACK;
else color = SSD1306_WHITE;
SSD1306_Display();
}
}
 
void SSD1306_Test_DrawLine(void) {
int i;
for (i = 0; i < ssd1306_data_p->_width; i += 4) {
SSD1306_Draw_Line(0, 0, i, ssd1306_data_p->_height - 1, SSD1306_WHITE);
SSD1306_Display();
}
for (i = 0; i < ssd1306_data_p->_height; i += 4) {
SSD1306_Draw_Line(0, 0, ssd1306_data_p->_width - 1, i, SSD1306_WHITE);
SSD1306_Display();
}
Delay10KTCYx(255);
 
SSD1306_Clear_Display();
for (i = 0; i < ssd1306_data_p->_width; i += 4) {
SSD1306_Draw_Line(0, ssd1306_data_p->_height - 1, i, 0, SSD1306_WHITE);
SSD1306_Display();
}
for (i = ssd1306_data_p->_height - 1; i >= 0; i -= 4) {
SSD1306_Draw_Line(0, ssd1306_data_p->_height - 1, ssd1306_data_p->_width - 1, i, SSD1306_WHITE);
SSD1306_Display();
}
Delay10KTCYx(255);
 
SSD1306_Clear_Display();
for (i = ssd1306_data_p->_width - 1; i >= 0; i -= 4) {
SSD1306_Draw_Line(ssd1306_data_p->_width - 1, ssd1306_data_p->_height - 1, i, 0, SSD1306_WHITE);
SSD1306_Display();
}
for (i = ssd1306_data_p->_height - 1; i >= 0; i -= 4) {
SSD1306_Draw_Line(ssd1306_data_p->_width - 1, ssd1306_data_p->_height - 1, 0, i, SSD1306_WHITE);
SSD1306_Display();
}
Delay10KTCYx(255);
 
SSD1306_Clear_Display();
for (i = 0; i < ssd1306_data_p->_height; i += 4) {
SSD1306_Draw_Line(ssd1306_data_p->_width - 1, 0, 0, i, SSD1306_WHITE);
SSD1306_Display();
}
for (i = 0; i < ssd1306_data_p->_width; i += 4) {
SSD1306_Draw_Line(ssd1306_data_p->_width - 1, 0, i, ssd1306_data_p->_height - 1, SSD1306_WHITE);
SSD1306_Display();
}
Delay10KTCYx(255);
}