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147 Kevin 1 
#include "defines.h"
121 Kevin 2 
#include "oled_ssd1306.h"
3 
#include "spi.h"
129 Kevin 4 
#include "glcdfont.c"
121 Kevin 5 
#include <delays.h>
129 Kevin 6 
#include <string.h>
7 
#include <stdio.h>
121 Kevin 8 
 
129 Kevin 9 
static SSD1306_DATA ssd1306_data;
10 
static SSD1306_DATA *ssd1306_data_p = &ssd1306_data;
11 
 
12 
#pragma idata LCD_BUFFER
121 Kevin 13 
// 512 (128x32) or 1024 (128x64) bytes allocated for LCD buffer
14 
// See linker file for details
15 
static unsigned char LCD_Buffer[SSD1306_LCDHEIGHT * SSD1306_LCDWIDTH / 8] = {
16 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
17 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
19 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80,
20 
    0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
21 
    0x00, 0x80, 0x80, 0xC0, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
22 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
23 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
24 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
25 
    0x00, 0x00, 0x00, 0x00, 0x80, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC, 0xF8, 0xE0, 0x00, 0x00, 0x00, 0x00,
26 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x80,
27 
    0x80, 0x80, 0x00, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0xFF,
28 
    0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00,
29 
    0x80, 0xFF, 0xFF, 0x80, 0x80, 0x00, 0x80, 0x80, 0x00, 0x80, 0x80, 0x80, 0x80, 0x00, 0x80, 0x80,
30 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x8C, 0x8E, 0x84, 0x00, 0x00, 0x80, 0xF8,
31 
    0xF8, 0xF8, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
32 
    0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xE0, 0xE0, 0xC0, 0x80,
33 
    0x00, 0xE0, 0xFC, 0xFE, 0xFF, 0xFF, 0xFF, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00,
34 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFE, 0xFF, 0xC7, 0x01, 0x01,
35 
    0x01, 0x01, 0x83, 0xFF, 0xFF, 0x00, 0x00, 0x7C, 0xFE, 0xC7, 0x01, 0x01, 0x01, 0x01, 0x83, 0xFF,
36 
    0xFF, 0xFF, 0x00, 0x38, 0xFE, 0xC7, 0x83, 0x01, 0x01, 0x01, 0x83, 0xC7, 0xFF, 0xFF, 0x00, 0x00,
37 
    0x01, 0xFF, 0xFF, 0x01, 0x01, 0x00, 0xFF, 0xFF, 0x07, 0x01, 0x01, 0x01, 0x00, 0x00, 0x7F, 0xFF,
38 
    0x80, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x7F, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x01, 0xFF,
39 
    0xFF, 0xFF, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
40 
    0x03, 0x0F, 0x3F, 0x7F, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xE7, 0xC7, 0xC7, 0x8F,
41 
    0x8F, 0x9F, 0xBF, 0xFF, 0xFF, 0xC3, 0xC0, 0xF0, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFC, 0xFC, 0xFC,
42 
    0xFC, 0xFC, 0xFC, 0xFC, 0xFC, 0xF8, 0xF8, 0xF0, 0xF0, 0xE0, 0xC0, 0x00, 0x01, 0x03, 0x03, 0x03,
43 
    0x03, 0x03, 0x01, 0x03, 0x03, 0x00, 0x00, 0x00, 0x00, 0x01, 0x03, 0x03, 0x03, 0x03, 0x01, 0x01,
44 
    0x03, 0x01, 0x00, 0x00, 0x00, 0x01, 0x03, 0x03, 0x03, 0x03, 0x01, 0x01, 0x03, 0x03, 0x00, 0x00,
45 
    0x00, 0x03, 0x03, 0x00, 0x00, 0x00, 0x03, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
46 
    0x03, 0x03, 0x03, 0x03, 0x03, 0x01, 0x00, 0x00, 0x00, 0x01, 0x03, 0x01, 0x00, 0x00, 0x00, 0x03,
47 
    0x03, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
48 
#if (SSD1306_LCDHEIGHT == 64)
49 
    0x00, 0x00, 0x00, 0x80, 0xC0, 0xE0, 0xF0, 0xF9, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x3F, 0x1F, 0x0F,
50 
    0x87, 0xC7, 0xF7, 0xFF, 0xFF, 0x1F, 0x1F, 0x3D, 0xFC, 0xF8, 0xF8, 0xF8, 0xF8, 0x7C, 0x7D, 0xFF,
51 
    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x3F, 0x0F, 0x07, 0x00, 0x30, 0x30, 0x00, 0x00,
52 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
53 
    0x00, 0x00, 0x00, 0x00, 0xFE, 0xFE, 0xFC, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
54 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xE0, 0xC0, 0x00,
55 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x30, 0x00, 0x00, 0x00, 0x00,
56 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
57 
    0x00, 0xC0, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x7F, 0x3F, 0x1F,
58 
    0x0F, 0x07, 0x1F, 0x7F, 0xFF, 0xFF, 0xF8, 0xF8, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xF8, 0xE0,
59 
    0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFE, 0xFE, 0x00, 0x00,
60 
    0x00, 0xFC, 0xFE, 0xFC, 0x0C, 0x06, 0x06, 0x0E, 0xFC, 0xF8, 0x00, 0x00, 0xF0, 0xF8, 0x1C, 0x0E,
61 
    0x06, 0x06, 0x06, 0x0C, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0xFE, 0xFE, 0x00, 0x00, 0x00, 0x00, 0xFC,
62 
    0xFE, 0xFC, 0x00, 0x18, 0x3C, 0x7E, 0x66, 0xE6, 0xCE, 0x84, 0x00, 0x00, 0x06, 0xFF, 0xFF, 0x06,
63 
    0x06, 0xFC, 0xFE, 0xFC, 0x0C, 0x06, 0x06, 0x06, 0x00, 0x00, 0xFE, 0xFE, 0x00, 0x00, 0xC0, 0xF8,
64 
    0xFC, 0x4E, 0x46, 0x46, 0x46, 0x4E, 0x7C, 0x78, 0x40, 0x18, 0x3C, 0x76, 0xE6, 0xCE, 0xCC, 0x80,
65 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
66 
    0x00, 0x00, 0x00, 0x00, 0x01, 0x07, 0x0F, 0x1F, 0x1F, 0x3F, 0x3F, 0x3F, 0x3F, 0x1F, 0x0F, 0x03,
67 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00, 0x00,
68 
    0x00, 0x0F, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00, 0x00, 0x03, 0x07, 0x0E, 0x0C,
69 
    0x18, 0x18, 0x0C, 0x06, 0x0F, 0x0F, 0x0F, 0x00, 0x00, 0x01, 0x0F, 0x0E, 0x0C, 0x18, 0x0C, 0x0F,
70 
    0x07, 0x01, 0x00, 0x04, 0x0E, 0x0C, 0x18, 0x0C, 0x0F, 0x07, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00,
71 
    0x00, 0x0F, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x07,
72 
    0x07, 0x0C, 0x0C, 0x18, 0x1C, 0x0C, 0x06, 0x06, 0x00, 0x04, 0x0E, 0x0C, 0x18, 0x0C, 0x0F, 0x07,
73 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
74 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
75 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
76 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
77 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
78 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
79 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
80 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
81 
#endif
82 
};
129 Kevin 83 
#pragma idata
121 Kevin 84 
 
129 Kevin 85 
int SSD1306_Abs(int i) {
86 
    if (i < 0)
87 
        return -i;
88 
    else
89 
        return i;
90 
}
91 
 
92 
void SSD1306_Swap(int *a, int *b) {
93 
    int tmp = *a;
94 
    *a = *b;
95 
    *b = tmp;
96 
}
97 
 
121 Kevin 98 
void SSD1306_Init() {
129 Kevin 99 
    ssd1306_data_p->_width = ssd1306_data_p->WIDTH = SSD1306_LCDWIDTH;
100 
    ssd1306_data_p->_height = ssd1306_data_p->HEIGHT = SSD1306_LCDHEIGHT;
101 
    ssd1306_data_p->rotation = 0;
102 
    ssd1306_data_p->cursor_x = ssd1306_data_p->cursor_y = 0;
103 
    ssd1306_data_p->textsize = 1;
104 
    ssd1306_data_p->textcolor = SSD1306_WHITE;
105 
    ssd1306_data_p->textbgcolor = SSD1306_BLACK;
106 
    ssd1306_data_p->wrap = 1;
121 Kevin 107 
}
108 
 
109 
void SSD1306_Begin(unsigned char vccstate) {
110 
    // Toggle reset pin
129 Kevin 111 
    SPI_RESET_LAT = 0;
121 Kevin 112 
    Delay10KTCYx(1);
129 Kevin 113 
    SPI_RESET_LAT = 1;
121 Kevin 114 
 
115 
#if defined SSD1306_128_32
116 
    // Init sequence for 128x32 OLED module
117 
    SSD1306_Command(SSD1306_DISPLAYOFF); // 0xAE
118 
    SSD1306_Command(SSD1306_SETDISPLAYCLOCKDIV); // 0xD5
119 
    SSD1306_Command(0x80); // The suggested ratio 0x80
120 
    SSD1306_Command(SSD1306_SETMULTIPLEX); // 0xA8
121 
    SSD1306_Command(0x1F);
122 
    SSD1306_Command(SSD1306_SETDISPLAYOFFSET); // 0xD3
123 
    SSD1306_Command(0x0); // No offset
124 
    SSD1306_Command(SSD1306_SETSTARTLINE | 0x0); // Line #0
125 
    SSD1306_Command(SSD1306_CHARGEPUMP); // 0x8D
126 
    if (vccstate == SSD1306_EXTERNALVCC) {
127 
        SSD1306_Command(0x10);
128 
    } else {
129 
        SSD1306_Command(0x14);
130 
    }
131 
    SSD1306_Command(SSD1306_MEMORYMODE); // 0x20
132 
    SSD1306_Command(0x00); // 0x0 act like ks0108
133 
    SSD1306_Command(SSD1306_SEGREMAP | 0x1);
134 
    SSD1306_Command(SSD1306_COMSCANDEC);
135 
    SSD1306_Command(SSD1306_SETCOMPINS); // 0xDA
136 
    SSD1306_Command(0x02);
137 
    SSD1306_Command(SSD1306_SETCONTRAST); // 0x81
138 
    SSD1306_Command(0x8F);
139 
    SSD1306_Command(SSD1306_SETPRECHARGE); // 0xd9
140 
    if (vccstate == SSD1306_EXTERNALVCC) {
141 
        SSD1306_Command(0x22);
142 
    } else {
143 
        SSD1306_Command(0xF1);
144 
    }
145 
    SSD1306_Command(SSD1306_SETVCOMDETECT); // 0xDB
146 
    SSD1306_Command(0x40);
147 
    SSD1306_Command(SSD1306_DISPLAYALLON_RESUME); // 0xA4
148 
    SSD1306_Command(SSD1306_NORMALDISPLAY); // 0xA6
149 
#endif
150 
 
151 
#if defined SSD1306_128_64
152 
    // Init sequence for 128x64 OLED module
153 
    SSD1306_Command(SSD1306_DISPLAYOFF); // 0xAE
154 
    SSD1306_Command(SSD1306_SETDISPLAYCLOCKDIV); // 0xD5
155 
    SSD1306_Command(0x80); // The suggested ratio 0x80
156 
    SSD1306_Command(SSD1306_SETMULTIPLEX); // 0xA8
157 
    SSD1306_Command(0x3F);
158 
    SSD1306_Command(SSD1306_SETDISPLAYOFFSET); // 0xD3
159 
    SSD1306_Command(0x0); // No offset
160 
    SSD1306_Command(SSD1306_SETSTARTLINE | 0x0); // Line #0
161 
    SSD1306_Command(SSD1306_CHARGEPUMP); // 0x8D
162 
    if (vccstate == SSD1306_EXTERNALVCC) {
163 
        SSD1306_Command(0x10);
164 
    } else {
165 
        SSD1306_Command(0x14);
166 
    }
167 
    SSD1306_Command(SSD1306_MEMORYMODE); // 0x20
168 
    SSD1306_Command(0x00); // 0x0 act like ks0108
169 
    SSD1306_Command(SSD1306_SEGREMAP | 0x1);
170 
    SSD1306_Command(SSD1306_COMSCANDEC);
171 
    SSD1306_Command(SSD1306_SETCOMPINS); // 0xDA
172 
    SSD1306_Command(0x12);
173 
    SSD1306_Command(SSD1306_SETCONTRAST); // 0x81
174 
    if (vccstate == SSD1306_EXTERNALVCC) {
175 
        SSD1306_Command(0x9F);
176 
    } else {
177 
        SSD1306_Command(0xCF);
178 
    }
179 
    SSD1306_Command(SSD1306_SETPRECHARGE); // 0xd9
180 
    if (vccstate == SSD1306_EXTERNALVCC) {
181 
        SSD1306_Command(0x22);
182 
    } else {
183 
        SSD1306_Command(0xF1);
184 
    }
185 
    SSD1306_Command(SSD1306_SETVCOMDETECT); // 0xDB
186 
    SSD1306_Command(0x40);
187 
    SSD1306_Command(SSD1306_DISPLAYALLON_RESUME); // 0xA4
188 
    SSD1306_Command(SSD1306_NORMALDISPLAY); // 0xA6
189 
#endif
190 
 
191 
    SSD1306_Command(SSD1306_DISPLAYON); // Turn on OLED panel
192 
}
193 
 
194 
void SSD1306_Command(unsigned char cmd) {
195 
    unsigned char c = cmd;
129 Kevin 196 
    SPI_DC_SELECT_LAT = 0; // D/C low (cmd)
121 Kevin 197 
    SPI2_Write(&c, 1);
198 
}
199 
 
200 
void SSD1306_Data(unsigned char data) {
201 
    unsigned char c = data;
129 Kevin 202 
    SPI_DC_SELECT_LAT = 1; // D/C high (data)
121 Kevin 203 
    SPI2_Write(&c, 1);
204 
}
205 
 
206 
void SSD1306_Clear_Display() {
207 
    memset(LCD_Buffer, 0, (SSD1306_LCDWIDTH * SSD1306_LCDHEIGHT / 8));
208 
}
209 
 
210 
void SSD1306_Invert_Display(unsigned char c) {
211 
    if (c) {
212 
        SSD1306_Command(SSD1306_INVERTDISPLAY);
213 
    } else {
214 
        SSD1306_Command((SSD1306_NORMALDISPLAY));
215 
    }
216 
}
217 
 
218 
void SSD1306_Display() {
219 
    unsigned int i;
220 
    unsigned char c = 0;
221 
 
222 
    SSD1306_Command(SSD1306_SETLOWCOLUMN | 0x0); // low col = 0
223 
    SSD1306_Command(SSD1306_SETHIGHCOLUMN | 0x0); // hi col = 0
224 
    SSD1306_Command(SSD1306_SETSTARTLINE | 0x0); // line #0
225 
 
129 Kevin 226 
    SPI_DC_SELECT_LAT = 1; // D/C high (data)
121 Kevin 227 
    SPI2_Write(LCD_Buffer, SSD1306_LCDWIDTH * SSD1306_LCDHEIGHT / 8);
228 
 
229 
//    if (SSD1306_LCDHEIGHT == 32) {
230 
//        SPI2_Write_Repeat(0, SSD1306_LCDWIDTH * SSD1306_LCDHEIGHT / 8);
231 
//    }
232 
}
233 
 
234 
void SSD1306_Draw_Pixel(int x, int y, unsigned int color) {
129 Kevin 235 
    if ((x < 0) || (x >= ssd1306_data_p->_width) || (y < 0) || (y >= ssd1306_data_p->_height))
121 Kevin 236 
        return;
237 
 
238 
    // check rotation, move pixel around if necessary
129 Kevin 239 
    switch (ssd1306_data_p->rotation) {
121 Kevin 240 
        case 1:
129 Kevin 241 
            SSD1306_Swap(&x, &y);
121 Kevin 242 
            x = SSD1306_LCDWIDTH - x - 1;
243 
            break;
244 
        case 2:
245 
            x = SSD1306_LCDWIDTH - x - 1;
246 
            y = SSD1306_LCDHEIGHT - y - 1;
247 
            break;
248 
        case 3:
129 Kevin 249 
            SSD1306_Swap(&x, &y);
121 Kevin 250 
            y = SSD1306_LCDHEIGHT - y - 1;
251 
            break;
252 
    }
253 
 
254 
    // x is which column
255 
    if (color == SSD1306_WHITE)
256 
        LCD_Buffer[x + (y / 8) * SSD1306_LCDWIDTH] |= 1<<(y % 8);
257 
    else
258 
        LCD_Buffer[x + (y / 8) * SSD1306_LCDWIDTH] &= ~(1<<(y % 8));
259 
}
260 
 
129 Kevin 261 
void SSD1306_Draw_Line(int x0, int y0, int x1, int y1, unsigned int color) {
262 
    int dx, dy, err, ystep;
263 
    int steep = SSD1306_Abs(y1 - y0) > SSD1306_Abs(x1 - x0);
264 
    if (steep) {
265 
        SSD1306_Swap(&x0, &y0);
266 
        SSD1306_Swap(&x1, &y1);
267 
    }
268 
 
269 
    if (x0 > x1) {
270 
        SSD1306_Swap(&x0, &x1);
271 
        SSD1306_Swap(&y0, &y1);
272 
    }
273 
 
274 
    dx = x1 - x0;
275 
    dy = SSD1306_Abs(y1 - y0);
276 
 
277 
    err = dx / 2;
278 
 
279 
    if (y0 < y1) {
280 
        ystep = 1;
281 
    } else {
282 
        ystep = -1;
283 
    }
284 
 
285 
    for (; x0 <= x1; x0++) {
286 
 
287 
        if (steep) {
288 
            SSD1306_Draw_Pixel(y0, x0, color);
289 
        } else {
290 
            SSD1306_Draw_Pixel(x0, y0, color);
291 
        }
292 
        err -= dy;
293 
        if (err < 0) {
294 
            y0 += ystep;
295 
            err += dx;
296 
        }
297 
    }
298 
}
299 
 
300 
void SSD1306_Draw_Fast_VLine(int x, int y, int h, unsigned int color) {
301 
    SSD1306_Draw_Line(x, y, x, y + h - 1, color);
302 
}
303 
 
304 
void SSD1306_Draw_Fast_HLine(int x, int y, int w, unsigned int color) {
305 
    SSD1306_Draw_Line(x, y, x + w - 1, y, color);
306 
}
307 
 
308 
void SSD1306_Draw_Rect(int x, int y, int w, int h, unsigned int color) {
309 
    SSD1306_Draw_Fast_HLine(x, y, w, color);
310 
    SSD1306_Draw_Fast_HLine(x, y + h, w, color);
311 
    SSD1306_Draw_Fast_VLine(x, y, h, color);
312 
    SSD1306_Draw_Fast_VLine(x + w, y, h, color);
313 
}
314 
 
315 
void SSD1306_Fill_Rect(int x, int y, int w, int h, unsigned int color) {
316 
    int i;
317 
    for (i = x; i < x + w; i++) {
318 
        SSD1306_Draw_Fast_VLine(i, y, h, color);
319 
    }
320 
}
321 
 
322 
void SSD1306_Draw_Circle(int x0, int y0, int r, unsigned int color) {
323 
    int f = 1 - r;
324 
    int ddF_x = 1;
325 
    int ddF_y = -2 * r;
326 
    int x = 0;
327 
    int y = r;
328 
 
329 
    SSD1306_Draw_Pixel(x0, y0 + r, color);
330 
    SSD1306_Draw_Pixel(x0, y0 - r, color);
331 
    SSD1306_Draw_Pixel(x0 + r, y0, color);
332 
    SSD1306_Draw_Pixel(x0 - r, y0, color);
333 
 
334 
    while (x < y) {
335 
        if (f >= 0) {
336 
            y--;
337 
            ddF_y += 2;
338 
            f += ddF_y;
339 
        }
340 
        x++;
341 
        ddF_x += 2;
342 
        f += ddF_x;
343 
 
344 
        SSD1306_Draw_Pixel(x0 + x, y0 + y, color);
345 
        SSD1306_Draw_Pixel(x0 - x, y0 + y, color);
346 
        SSD1306_Draw_Pixel(x0 + x, y0 - y, color);
347 
        SSD1306_Draw_Pixel(x0 - x, y0 - y, color);
348 
        SSD1306_Draw_Pixel(x0 + y, y0 + x, color);
349 
        SSD1306_Draw_Pixel(x0 - y, y0 + x, color);
350 
        SSD1306_Draw_Pixel(x0 + y, y0 - x, color);
351 
        SSD1306_Draw_Pixel(x0 - y, y0 - x, color);
352 
    }
353 
}
354 
 
355 
void SSD1306_Draw_Circle_Helper(int x0, int y0, int r, unsigned char cornername, unsigned int color) {
356 
    int f = 1 - r;
357 
    int ddF_x = 1;
358 
    int ddF_y = -2 * r;
359 
    int x = 0;
360 
    int y = r;
361 
 
362 
    while (x < y) {
363 
        if (f >= 0) {
364 
            y--;
365 
            ddF_y += 2;
366 
            f += ddF_y;
367 
        }
368 
        x++;
369 
        ddF_x += 2;
370 
        f += ddF_x;
371 
        if (cornername & 0x4) {
372 
            SSD1306_Draw_Pixel(x0 + x, y0 + y, color);
373 
            SSD1306_Draw_Pixel(x0 + y, y0 + x, color);
374 
        }
375 
        if (cornername & 0x2) {
376 
            SSD1306_Draw_Pixel(x0 + x, y0 - y, color);
377 
            SSD1306_Draw_Pixel(x0 + y, y0 - x, color);
378 
        }
379 
        if (cornername & 0x8) {
380 
            SSD1306_Draw_Pixel(x0 - y, y0 + x, color);
381 
            SSD1306_Draw_Pixel(x0 - x, y0 + y, color);
382 
        }
383 
        if (cornername & 0x1) {
384 
            SSD1306_Draw_Pixel(x0 - y, y0 - x, color);
385 
            SSD1306_Draw_Pixel(x0 - x, y0 - y, color);
386 
        }
387 
    }
388 
}
389 
 
390 
void SSD1306_Fill_Circle(int x0, int y0, int r, unsigned int color) {
391 
    SSD1306_Draw_Fast_VLine(x0, y0 - r, 2 * r + 1, color);
392 
    SSD1306_Fill_Circle_Helper(x0, y0, r, 3, 0, color);
393 
}
394 
 
395 
void SSD1306_Fill_Circle_Helper(int x0, int y0, int r, unsigned char cornername, int delta, unsigned int color) {
396 
    int f = 1 - r;
397 
    int ddF_x = 1;
398 
    int ddF_y = -2 * r;
399 
    int x = 0;
400 
    int y = r;
401 
 
402 
    while (x < y) {
403 
        if (f >= 0) {
404 
            y--;
405 
            ddF_y += 2;
406 
            f += ddF_y;
407 
        }
408 
        x++;
409 
        ddF_x += 2;
410 
        f += ddF_x;
411 
 
412 
        if (cornername & 0x1) {
413 
            SSD1306_Draw_Fast_VLine(x0 + x, y0 - y, 2 * y + 1 + delta, color);
414 
            SSD1306_Draw_Fast_VLine(x0 + y, y0 - x, 2 * x + 1 + delta, color);
415 
        }
416 
        if (cornername & 0x2) {
417 
            SSD1306_Draw_Fast_VLine(x0 - x, y0 - y, 2 * y + 1 + delta, color);
418 
            SSD1306_Draw_Fast_VLine(x0 - y, y0 - x, 2 * x + 1 + delta, color);
419 
        }
420 
    }
421 
}
422 
 
423 
void SSD1306_Draw_Triangle(int x0, int y0, int x1, int y1, int x2, int y2, unsigned int color) {
424 
    SSD1306_Draw_Line(x0, y0, x1, y1, color);
425 
    SSD1306_Draw_Line(x1, y1, x2, y2, color);
426 
    SSD1306_Draw_Line(x2, y2, x0, y0, color);
427 
}
428 
 
429 
void SSD1306_Fill_Triangle(int x0, int y0, int x1, int y1, int x2, int y2, unsigned int color) {
430 
    int a, b, y, last;
431 
    int dx01 = x1 - x0;
432 
    int dy01 = y1 - y0;
433 
    int dx02 = x2 - x0;
434 
    int dy02 = y2 - y0;
435 
    int dx12 = x2 - x1;
436 
    int dy12 = y2 - y1;
437 
    int sa = 0;
438 
    int sb = 0;
439 
 
440 
    // Sort coordinates by Y order (y2 >= y1 >= y0)
441 
    if (y0 > y1) {
442 
        SSD1306_Swap(&y0, &y1);
443 
        SSD1306_Swap(&x0, &x1);
444 
    }
445 
    if (y1 > y2) {
446 
        SSD1306_Swap(&y2, &y1);
447 
        SSD1306_Swap(&x2, &x1);
448 
    }
449 
    if (y0 > y1) {
450 
        SSD1306_Swap(&y0, &y1);
451 
        SSD1306_Swap(&x0, &x1);
452 
    }
453 
 
454 
    if (y0 == y2) { // Handle awkward all-on-same-line case as its own thing
455 
        a = b = x0;
456 
        if (x1 < a) a = x1;
457 
        else if (x1 > b) b = x1;
458 
        if (x2 < a) a = x2;
459 
        else if (x2 > b) b = x2;
460 
        SSD1306_Draw_Fast_HLine(a, y0, b - a + 1, color);
461 
        return;
462 
    }
463 
 
464 
    // For upper part of triangle, find scanline crossings for segments
465 
    // 0-1 and 0-2.  If y1=y2 (flat-bottomed triangle), the scanline y1
466 
    // is included here (and second loop will be skipped, avoiding a /0
467 
    // error there), otherwise scanline y1 is skipped here and handled
468 
    // in the second loop...which also avoids a /0 error here if y0=y1
469 
    // (flat-topped triangle).
470 
    if (y1 == y2) last = y1; // Include y1 scanline
471 
    else last = y1 - 1; // Skip it
472 
 
473 
    for (y = y0; y <= last; y++) {
474 
        a = x0 + sa / dy01;
475 
        b = x0 + sb / dy02;
476 
        sa += dx01;
477 
        sb += dx02;
478 
        /* longhand:
479 
        a = x0 + (x1 - x0) * (y - y0) / (y1 - y0);
480 
        b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
481 
         */
482 
        if (a > b) SSD1306_Swap(&a, &b);
483 
        SSD1306_Draw_Fast_HLine(a, y, b - a + 1, color);
484 
    }
485 
 
486 
    // For lower part of triangle, find scanline crossings for segments
487 
    // 0-2 and 1-2.  This loop is skipped if y1=y2.
488 
    sa = dx12 * (y - y1);
489 
    sb = dx02 * (y - y0);
490 
    for (; y <= y2; y++) {
491 
        a = x1 + sa / dy12;
492 
        b = x0 + sb / dy02;
493 
        sa += dx12;
494 
        sb += dx02;
495 
        /* longhand:
496 
        a = x1 + (x2 - x1) * (y - y1) / (y2 - y1);
497 
        b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
498 
         */
499 
        if (a > b) SSD1306_Swap(&a, &b);
500 
        SSD1306_Draw_Fast_HLine(a, y, b - a + 1, color);
501 
    }
502 
}
503 
 
504 
void SSD1306_Draw_Round_Rect(int x, int y, int w, int h, int r, unsigned int color) {
505 
    // smarter version
506 
    SSD1306_Draw_Fast_HLine(x + r, y, w - 2 * r, color); // Top
507 
    SSD1306_Draw_Fast_HLine(x + r, y + h - 1, w - 2 * r, color); // Bottom
508 
    SSD1306_Draw_Fast_VLine(x, y + r, h - 2 * r, color); // Left
509 
    SSD1306_Draw_Fast_VLine(x + w - 1, y + r, h - 2 * r, color); // Right
510 
 
511 
    // draw four corners
512 
    SSD1306_Draw_Circle_Helper(x + r, y + r, r, 1, color);
513 
    SSD1306_Draw_Circle_Helper(x + w - r - 1, y + r, r, 2, color);
514 
    SSD1306_Draw_Circle_Helper(x + w - r - 1, y + h - r - 1, r, 4, color);
515 
    SSD1306_Draw_Circle_Helper(x + r, y + h - r - 1, r, 8, color);
516 
}
517 
 
518 
void SSD1306_Fill_Round_Rect(int x, int y, int w, int h, int r, unsigned int color) {
519 
    // smarter version
520 
    SSD1306_Fill_Rect(x + r, y, w - 2 * r, h, color);
521 
 
522 
    // draw four corners
523 
    SSD1306_Fill_Circle_Helper(x + w - r - 1, y + r, r, 1, h - 2 * r - 1, color);
524 
    SSD1306_Fill_Circle_Helper(x + r, y + r, r, 2, h - 2 * r - 1, color);
525 
}
526 
 
527 
void SSD1306_Draw_Bitmap(int x, int y, const unsigned char* bitmap, int w, int h, unsigned int color) {
528 
    int i, j;
529 
    for (j = 0; j < h; j++) {
530 
        for (i = 0; i < w; i++) {
531 
            if (bitmap[i + (j / 8) * w] & (j % 8)) {
532 
                SSD1306_Draw_Pixel(x + i, y + j, color);
533 
            }
534 
        }
535 
    }
536 
}
537 
 
538 
void SSD1306_Draw_Char(int x, int y, unsigned char c, unsigned int color, unsigned int bg, unsigned char size) {
539 
    int i, j;
540 
    unsigned int line;
541 
 
542 
    if ((x >= ssd1306_data_p->_width) || // Clip right
543 
            (y >= ssd1306_data_p->_height) || // Clip bottom
544 
            ((x + 5 * size - 1) < 0) || // Clip left
545 
            ((y + 8 * size - 1) < 0)) // Clip top
546 
        return;
547 
 
548 
    for (i = 0; i < 6; i++) {
549 
        if (i == 5)
550 
            line = 0x0;
551 
        else
552 
            line = font[(c * 5) + i];
553 
        for (j = 0; j < 8; j++) {
554 
            if (line & 0x1) {
555 
                if (size == 1) {// default size
556 
                    SSD1306_Draw_Pixel(x + i, y + j, color);
557 
                } else { // big size
558 
                    SSD1306_Fill_Rect(x + (i * size), y + (j * size), size, size, color);
559 
                }
560 
            } else if (bg != color) {
561 
                if (size == 1) { // default size
562 
                    SSD1306_Draw_Pixel(x + i, y + j, bg);
563 
                } else { // big size
564 
                    SSD1306_Fill_Rect(x + i*size, y + j*size, size, size, bg);
565 
                }
566 
            }
567 
            line >>= 1;
568 
        }
569 
    }
570 
}
571 
 
572 
void SSD1306_Write(unsigned char c) {
573 
    if (c == '\n' || c == '\r') {
574 
        ssd1306_data_p->cursor_y += ssd1306_data_p->textsize * 8;
575 
        ssd1306_data_p->cursor_x = 0;
576 
        //    } else if (c == '\r') {
577 
        //        // skip em
578 
    } else {
579 
        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);
580 
        ssd1306_data_p->cursor_x += ssd1306_data_p->textsize * 6;
581 
        if (ssd1306_data_p->wrap && (ssd1306_data_p->cursor_x > (ssd1306_data_p->_width - ssd1306_data_p->textsize * 6))) {
582 
            ssd1306_data_p->cursor_y += ssd1306_data_p->textsize * 8;
583 
            ssd1306_data_p->cursor_x = 0;
584 
        }
585 
    }
586 
}
587 
 
588 
void SSD1306_Write_String(const rom char *fmt, ...) {
589 
    unsigned char i, len;
590 
    unsigned char buffer[SSD1306_STRING_BUFFER_SIZE];
591 
 
592 
    // Parse and create string
593 
    va_list args;
594 
    va_start(args, fmt);
595 
    vsprintf((char *) buffer, fmt, args);
596 
    va_end(args);
597 
    len = strlen((char *) buffer);
598 
 
599 
    // Make sure string to insert fits in buffer, truncate if necessary
600 
    if (len > SSD1306_STRING_BUFFER_SIZE)
601 
        len = SSD1306_STRING_BUFFER_SIZE;
602 
 
603 
    // Print buffer to string
604 
    for (i = 0; i < len; i++) {
605 
        SSD1306_Write(buffer[i]);
606 
    }
607 
}
608 
 
609 
//void SSD1306_Append_String(const rom char *fmt, ...) {
610 
//    unsigned char i, len;
611 
//    unsigned char buffer[SSD1306_STRING_BUFFER_SIZE];
612 
//
613 
//    // Parse and create string
614 
//    va_list args;
615 
//    va_start(args, fmt);
616 
//    vsprintf((char *) buffer, fmt, args);
617 
//    va_end(args);
618 
//
619 
//    // Make sure string to insert fits in buffer, truncate if necessary
620 
//    len = strlen((char *) buffer);
621 
//
622 
//    if (len == 1) {  // This will only occur on "\n"
623 
//        // Do nothing?
624 
//        return;
625 
//    }
626 
//
627 
//    if (len > SSD1306_STRING_BUFFER_SIZE)
628 
//        len = SSD1306_STRING_BUFFER_SIZE;
629 
//
630 
//    // Omit the newline if string fill entire line
631 
//    if (((len - 1)%(ssd1306_data_p->_width / 6)) == 0) { // 16 or 10
632 
//        len -= 1;
633 
//    }
634 
//
635 
//    // Shift everything right and insert string at beginning
636 
//    for (i = 127; i > len - 1; i--) {
637 
//        ssd1306_data_p->lcd_buffer[i] = ssd1306_data_p->lcd_buffer[i - len];
638 
//    }
639 
//    memcpy((char *)ssd1306_data_p->lcd_buffer, (const char *) buffer, len);
640 
//
641 
//    // Print full buffer to screen
642 
//    SSD1306_Clear_Display();
643 
//    SSD1306_Display();
644 
//
645 
//    SSD1306_Set_Cursor(0,0);
646 
//    for (i = 0; i < SSD1306_LCD_BUFFER_SIZE-1; i++) {
647 
//        SSD1306_Write(ssd1306_data_p->lcd_buffer[i]);
648 
//    }
649 
//}
650 
 
651 
void SSD1306_Set_Cursor(int x, int y) {
652 
    ssd1306_data_p->cursor_x = x;
653 
    ssd1306_data_p->cursor_y = y;
654 
}
655 
 
656 
void SSD1306_Set_Text_Color(unsigned int c) {
657 
    // for 'transparent' background, we'll set the bg
658 
    // to the same as fg instead of using a flag
659 
    ssd1306_data_p->textcolor = c;
660 
    ssd1306_data_p->textbgcolor = c;
661 
}
662 
 
663 
void SSD1306_Set_Text_Color_BG(unsigned int c, unsigned int bg) {
664 
    ssd1306_data_p->textcolor = c;
665 
    ssd1306_data_p->textbgcolor = bg;
666 
}
667 
 
668 
void SSD1306_Set_Text_Size(unsigned char s) {
669 
    ssd1306_data_p->textsize = (s > 0) ? s : 1;
670 
}
671 
 
672 
void SSD1306_Set_Text_Wrap(unsigned char w) {
673 
    ssd1306_data_p->wrap = w;
674 
}
675 
 
676 
void SSD1306_Set_Rotation(unsigned char x) {
677 
    x %= 4; // cant be higher than 3
678 
    ssd1306_data_p->rotation = x;
679 
    switch (x) {
680 
        case 0:
681 
        case 2:
682 
            ssd1306_data_p->_width = ssd1306_data_p->WIDTH;
683 
            ssd1306_data_p->_height = ssd1306_data_p->HEIGHT;
684 
            break;
685 
        case 1:
686 
        case 3:
687 
            ssd1306_data_p->_width = ssd1306_data_p->HEIGHT;
688 
            ssd1306_data_p->_height = ssd1306_data_p->WIDTH;
689 
            break;
690 
    }
691 
}
692 
 
693 
 
694 
 
121 Kevin 695 
void SSD1306_Test_DrawChar() {
696 
    unsigned char i;
129 Kevin 697 
    SSD1306_Set_Text_Size(1);
698 
    SSD1306_Set_Text_Color(SSD1306_WHITE);
699 
    SSD1306_Set_Cursor(0, 0);
121 Kevin 700 
 
701 
    for (i = 0; i < 168; i++) {
702 
        if (i == '\n') continue;
129 Kevin 703 
        SSD1306_Write(i);
121 Kevin 704 
//        if ((i > 0) && (i % 21 == 0))
129 Kevin 705 
//            SSD1306_write('\n');
121 Kevin 706 
    }
707 
    SSD1306_Display();
708 
}
709 
 
710 
void SSD1306_Test_DrawCircle() {
711 
    int i;
129 Kevin 712 
    for (i = 0; i < ssd1306_data_p->_height; i += 2) {
713 
        SSD1306_Draw_Circle(ssd1306_data_p->_width / 2, ssd1306_data_p->_height / 2, i, SSD1306_WHITE);
121 Kevin 714 
        SSD1306_Display();
715 
    }
716 
}
717 
 
718 
void SSD1306_Test_DrawRect(void) {
719 
    int i;
129 Kevin 720 
    for (i = 0; i < ssd1306_data_p->_height / 2; i += 2) {
721 
        SSD1306_Draw_Rect(i, i, ssd1306_data_p->_width - 2 * i, ssd1306_data_p->_height - 2 * i, SSD1306_WHITE);
121 Kevin 722 
        SSD1306_Display();
723 
    }
724 
}
725 
 
726 
void SSD1306_Test_FillRect(void) {
727 
    unsigned char color = 1;
728 
    int i;
129 Kevin 729 
    for (i = 0; i < ssd1306_data_p->_height / 2; i += 3) {
121 Kevin 730 
        // alternate colors
129 Kevin 731 
        SSD1306_Fill_Rect(i, i, ssd1306_data_p->_width - i * 2, ssd1306_data_p->_height - i * 2, color % 2);
121 Kevin 732 
        SSD1306_Display();
733 
        color++;
734 
    }
735 
}
736 
 
737 
void SSD1306_Test_DrawTriangle(void) {
738 
    int i;
129 Kevin 739 
    int min = ssd1306_data_p->_width < ssd1306_data_p->_height ? ssd1306_data_p->_width : ssd1306_data_p->_height;
121 Kevin 740 
    for (i = 0; i < min / 2; i += 5) {
129 Kevin 741 
        SSD1306_Draw_Triangle(ssd1306_data_p->_width / 2, ssd1306_data_p->_height / 2 - i,
742 
                ssd1306_data_p->_width / 2 - i, ssd1306_data_p->_height / 2 + i,
743 
                ssd1306_data_p->_width / 2 + i, ssd1306_data_p->_height / 2 + i, SSD1306_WHITE);
121 Kevin 744 
        SSD1306_Display();
745 
    }
746 
}
747 
 
748 
void SSD1306_Test_FillTriangle(void) {
749 
    unsigned char color = SSD1306_WHITE;
750 
    int i;
129 Kevin 751 
    int min = ssd1306_data_p->_width < ssd1306_data_p->_height ? ssd1306_data_p->_width : ssd1306_data_p->_height;
121 Kevin 752 
    for (i = min / 2; i > 0; i -= 5) {
129 Kevin 753 
        SSD1306_Fill_Triangle(ssd1306_data_p->_width / 2, ssd1306_data_p->_height / 2 - i,
754 
                ssd1306_data_p->_width / 2 - i, ssd1306_data_p->_height / 2 + i,
755 
                ssd1306_data_p->_width / 2 + i, ssd1306_data_p->_height / 2 + i, SSD1306_WHITE);
121 Kevin 756 
        if (color == SSD1306_WHITE) color = SSD1306_BLACK;
757 
        else color = SSD1306_WHITE;
758 
        SSD1306_Display();
759 
    }
760 
}
761 
 
762 
void SSD1306_Test_DrawRoundRect(void) {
763 
    int i;
129 Kevin 764 
    for (i = 0; i < ssd1306_data_p->_height / 2 - 2; i += 2) {
765 
        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);
121 Kevin 766 
        SSD1306_Display();
767 
    }
768 
}
769 
 
770 
void SSD1306_Test_FillRoundRect(void) {
771 
    unsigned char color = SSD1306_WHITE;
772 
    int i;
129 Kevin 773 
    for (i = 0; i < ssd1306_data_p->_height / 2 - 2; i += 2) {
774 
        SSD1306_Fill_Round_Rect(i, i, ssd1306_data_p->_width - 2 * i, ssd1306_data_p->_height - 2 * i, ssd1306_data_p->_height / 4, color);
121 Kevin 775 
        if (color == SSD1306_WHITE) color = SSD1306_BLACK;
776 
        else color = SSD1306_WHITE;
777 
        SSD1306_Display();
778 
    }
779 
}
780 
 
781 
void SSD1306_Test_DrawLine(void) {
782 
    int i;
129 Kevin 783 
    for (i = 0; i < ssd1306_data_p->_width; i += 4) {
784 
        SSD1306_Draw_Line(0, 0, i, ssd1306_data_p->_height - 1, SSD1306_WHITE);
121 Kevin 785 
        SSD1306_Display();
786 
    }
129 Kevin 787 
    for (i = 0; i < ssd1306_data_p->_height; i += 4) {
788 
        SSD1306_Draw_Line(0, 0, ssd1306_data_p->_width - 1, i, SSD1306_WHITE);
121 Kevin 789 
        SSD1306_Display();
790 
    }
791 
    Delay10KTCYx(255);
792 
 
793 
    SSD1306_Clear_Display();
129 Kevin 794 
    for (i = 0; i < ssd1306_data_p->_width; i += 4) {
795 
        SSD1306_Draw_Line(0, ssd1306_data_p->_height - 1, i, 0, SSD1306_WHITE);
121 Kevin 796 
        SSD1306_Display();
797 
    }
129 Kevin 798 
    for (i = ssd1306_data_p->_height - 1; i >= 0; i -= 4) {
799 
        SSD1306_Draw_Line(0, ssd1306_data_p->_height - 1, ssd1306_data_p->_width - 1, i, SSD1306_WHITE);
121 Kevin 800 
        SSD1306_Display();
801 
    }
802 
    Delay10KTCYx(255);
803 
 
804 
    SSD1306_Clear_Display();
129 Kevin 805 
    for (i = ssd1306_data_p->_width - 1; i >= 0; i -= 4) {
806 
        SSD1306_Draw_Line(ssd1306_data_p->_width - 1, ssd1306_data_p->_height - 1, i, 0, SSD1306_WHITE);
121 Kevin 807 
        SSD1306_Display();
808 
    }
129 Kevin 809 
    for (i = ssd1306_data_p->_height - 1; i >= 0; i -= 4) {
810 
        SSD1306_Draw_Line(ssd1306_data_p->_width - 1, ssd1306_data_p->_height - 1, 0, i, SSD1306_WHITE);
121 Kevin 811 
        SSD1306_Display();
812 
    }
813 
    Delay10KTCYx(255);
814 
 
815 
    SSD1306_Clear_Display();
129 Kevin 816 
    for (i = 0; i < ssd1306_data_p->_height; i += 4) {
817 
        SSD1306_Draw_Line(ssd1306_data_p->_width - 1, 0, 0, i, SSD1306_WHITE);
121 Kevin 818 
        SSD1306_Display();
819 
    }
129 Kevin 820 
    for (i = 0; i < ssd1306_data_p->_width; i += 4) {
821 
        SSD1306_Draw_Line(ssd1306_data_p->_width - 1, 0, i, ssd1306_data_p->_height - 1, SSD1306_WHITE);
121 Kevin 822 
        SSD1306_Display();
823 
    }
824 
    Delay10KTCYx(255);
825 
}