derived from Aidafruit SSD1306 library
Dependents: Test_SSD1306 L152RE_OLED_SSD1306 EcranZumo
Fork of SSD1306 by
ssd1306.cpp@1:1d58d378221c, 2013-02-05 (annotated)
- Committer:
- Byrn
- Date:
- Tue Feb 05 17:18:23 2013 +0000
- Revision:
- 1:1d58d378221c
- Parent:
- 0:21cb91208386
- Child:
- 2:e479b0296757
intiial commit;
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Byrn | 0:21cb91208386 | 1 | |
Byrn | 0:21cb91208386 | 2 | #include "mbed.h" |
Byrn | 0:21cb91208386 | 3 | #include "ssd1306.h" |
Byrn | 0:21cb91208386 | 4 | |
Byrn | 0:21cb91208386 | 5 | SSD1306::SSD1306(PinName cs, PinName rs, PinName dc, PinName clk, PinName data) |
Byrn | 1:1d58d378221c | 6 | : _spi(data, NC, clk), |
Byrn | 1:1d58d378221c | 7 | _cs(cs), |
Byrn | 1:1d58d378221c | 8 | _reset(rs), |
Byrn | 1:1d58d378221c | 9 | _dc(dc) |
Byrn | 0:21cb91208386 | 10 | { |
Byrn | 0:21cb91208386 | 11 | } |
Byrn | 0:21cb91208386 | 12 | |
Byrn | 0:21cb91208386 | 13 | void SSD1306::set_low_column(int v) |
Byrn | 0:21cb91208386 | 14 | { |
Byrn | 0:21cb91208386 | 15 | _send_command(SSD1306_SETLOWCOLUMN | v); |
Byrn | 0:21cb91208386 | 16 | } |
Byrn | 0:21cb91208386 | 17 | |
Byrn | 0:21cb91208386 | 18 | void SSD1306::set_high_column(int v) |
Byrn | 0:21cb91208386 | 19 | { |
Byrn | 0:21cb91208386 | 20 | _send_command(SSD1306_SETHIGHCOLUMN | v); |
Byrn | 0:21cb91208386 | 21 | } |
Byrn | 0:21cb91208386 | 22 | |
Byrn | 0:21cb91208386 | 23 | void SSD1306::set_start_line(int v) |
Byrn | 0:21cb91208386 | 24 | { |
Byrn | 0:21cb91208386 | 25 | _send_command(SSD1306_SETSTARTLINE | v); |
Byrn | 0:21cb91208386 | 26 | } |
Byrn | 0:21cb91208386 | 27 | |
Byrn | 0:21cb91208386 | 28 | void SSD1306::off() |
Byrn | 0:21cb91208386 | 29 | { |
Byrn | 0:21cb91208386 | 30 | _send_command(SSD1306_DISPLAYOFF); |
Byrn | 0:21cb91208386 | 31 | } |
Byrn | 0:21cb91208386 | 32 | |
Byrn | 0:21cb91208386 | 33 | void SSD1306::on() |
Byrn | 0:21cb91208386 | 34 | { |
Byrn | 0:21cb91208386 | 35 | _send_command(SSD1306_DISPLAYON); |
Byrn | 0:21cb91208386 | 36 | } |
Byrn | 0:21cb91208386 | 37 | |
Byrn | 1:1d58d378221c | 38 | void SSD1306::sleep() |
Byrn | 1:1d58d378221c | 39 | { |
Byrn | 1:1d58d378221c | 40 | _send_command(0xAE); |
Byrn | 1:1d58d378221c | 41 | } |
Byrn | 1:1d58d378221c | 42 | |
Byrn | 1:1d58d378221c | 43 | void SSD1306::wake() |
Byrn | 0:21cb91208386 | 44 | { |
Byrn | 1:1d58d378221c | 45 | _send_command(0xAF); |
Byrn | 1:1d58d378221c | 46 | } |
Byrn | 1:1d58d378221c | 47 | |
Byrn | 1:1d58d378221c | 48 | void SSD1306::set_inverse(unsigned char value) |
Byrn | 1:1d58d378221c | 49 | { |
Byrn | 1:1d58d378221c | 50 | _send_command(value ? 0xA7 : 0xA6); |
Byrn | 1:1d58d378221c | 51 | } |
Byrn | 1:1d58d378221c | 52 | |
Byrn | 1:1d58d378221c | 53 | void SSD1306::set_display_offset(unsigned char value) |
Byrn | 1:1d58d378221c | 54 | { |
Byrn | 1:1d58d378221c | 55 | _send_command(0xD3); |
Byrn | 1:1d58d378221c | 56 | _send_command(value); |
Byrn | 0:21cb91208386 | 57 | } |
Byrn | 0:21cb91208386 | 58 | |
Byrn | 1:1d58d378221c | 59 | void SSD1306::set_contrast(unsigned char value) |
Byrn | 1:1d58d378221c | 60 | { |
Byrn | 1:1d58d378221c | 61 | _send_command(0x81); |
Byrn | 1:1d58d378221c | 62 | _send_command(value); |
Byrn | 1:1d58d378221c | 63 | } |
Byrn | 1:1d58d378221c | 64 | |
Byrn | 1:1d58d378221c | 65 | void SSD1306::set_display_start_line(unsigned char value) |
Byrn | 1:1d58d378221c | 66 | { |
Byrn | 1:1d58d378221c | 67 | _send_command(0x40 | value); |
Byrn | 1:1d58d378221c | 68 | } |
Byrn | 1:1d58d378221c | 69 | |
Byrn | 1:1d58d378221c | 70 | void SSD1306::set_horizontal_flip(unsigned char value) |
Byrn | 0:21cb91208386 | 71 | { |
Byrn | 1:1d58d378221c | 72 | _send_command(value ? 0xA1 : 0xA0); |
Byrn | 1:1d58d378221c | 73 | } |
Byrn | 1:1d58d378221c | 74 | |
Byrn | 1:1d58d378221c | 75 | void SSD1306::set_multiplex_ratio(unsigned char value) |
Byrn | 1:1d58d378221c | 76 | { |
Byrn | 1:1d58d378221c | 77 | _send_command(0xA8 | value); |
Byrn | 1:1d58d378221c | 78 | } |
Byrn | 1:1d58d378221c | 79 | |
Byrn | 1:1d58d378221c | 80 | void SSD1306::set_com_output_scan_direction(unsigned char value) |
Byrn | 1:1d58d378221c | 81 | { |
Byrn | 1:1d58d378221c | 82 | _send_command(value ? 0xC8 : 0xC0); |
Byrn | 1:1d58d378221c | 83 | } |
Byrn | 1:1d58d378221c | 84 | |
Byrn | 1:1d58d378221c | 85 | void SSD1306::set_com_pins_hardware_configuration(unsigned char sequential, unsigned char lr_remap) |
Byrn | 1:1d58d378221c | 86 | { |
Byrn | 1:1d58d378221c | 87 | _send_command(0xDA); |
Byrn | 1:1d58d378221c | 88 | _send_command(0x02 | ((sequential & 1) << 5) | ((lr_remap & 1) << 6)); |
Byrn | 0:21cb91208386 | 89 | } |
Byrn | 0:21cb91208386 | 90 | |
Byrn | 0:21cb91208386 | 91 | void SSD1306::initialise() |
Byrn | 0:21cb91208386 | 92 | { |
Byrn | 1:1d58d378221c | 93 | // Init |
Byrn | 0:21cb91208386 | 94 | _reset = 1; |
Byrn | 0:21cb91208386 | 95 | wait(0.01); |
Byrn | 0:21cb91208386 | 96 | _reset = 0; |
Byrn | 0:21cb91208386 | 97 | wait(0.10); |
Byrn | 0:21cb91208386 | 98 | _reset = 1; |
Byrn | 0:21cb91208386 | 99 | |
Byrn | 0:21cb91208386 | 100 | off(); |
Byrn | 0:21cb91208386 | 101 | |
Byrn | 0:21cb91208386 | 102 | set_low_column(0); |
Byrn | 0:21cb91208386 | 103 | set_high_column(0); |
Byrn | 0:21cb91208386 | 104 | set_start_line(0); |
Byrn | 0:21cb91208386 | 105 | |
Byrn | 1:1d58d378221c | 106 | _send_command(0xAE); // turn off |
Byrn | 1:1d58d378221c | 107 | _send_command(0x00); // set low column address |
Byrn | 1:1d58d378221c | 108 | _send_command(0x10); // set high column address |
Byrn | 1:1d58d378221c | 109 | _send_command(0x40); // set start line address |
Byrn | 1:1d58d378221c | 110 | |
Byrn | 1:1d58d378221c | 111 | set_contrast(0xFF); |
Byrn | 1:1d58d378221c | 112 | |
Byrn | 1:1d58d378221c | 113 | _send_command(0xA1); // set segment re-map 95 to 0 |
Byrn | 1:1d58d378221c | 114 | _send_command(0xA6); // set normal display |
Byrn | 1:1d58d378221c | 115 | _send_command(0xA8); // set multiplex ratio (1-64); |
Byrn | 1:1d58d378221c | 116 | _send_command(0x3F); // 1/64 duty |
Byrn | 1:1d58d378221c | 117 | _send_command(0xD3); // set display offset |
Byrn | 1:1d58d378221c | 118 | _send_command(0x00); // -- no offset |
Byrn | 1:1d58d378221c | 119 | _send_command(0xD5); // set display clock divide ratio/oscillator frequency |
Byrn | 1:1d58d378221c | 120 | _send_command(0x80); // -- set divide ratio |
Byrn | 1:1d58d378221c | 121 | _send_command(0xD9); // set precharge period; |
Byrn | 1:1d58d378221c | 122 | _send_command(0xF1); |
Byrn | 1:1d58d378221c | 123 | _send_command(0xDA); // set com pins hardware config |
Byrn | 1:1d58d378221c | 124 | _send_command(0x12); |
Byrn | 1:1d58d378221c | 125 | _send_command(0xDB); // set vcomh |
Byrn | 1:1d58d378221c | 126 | _send_command(0x40); |
Byrn | 1:1d58d378221c | 127 | _send_command(0x8D); // set charge pump enable/disable |
Byrn | 1:1d58d378221c | 128 | _send_command(0x14); // enable (0x10 disable) |
Byrn | 1:1d58d378221c | 129 | _send_command(0xAF); // switch panel on |
Byrn | 1:1d58d378221c | 130 | |
Byrn | 1:1d58d378221c | 131 | set_inverse(1); |
Byrn | 1:1d58d378221c | 132 | |
Byrn | 1:1d58d378221c | 133 | /* |
Byrn | 0:21cb91208386 | 134 | _send_command(SSD1306_SETCONTRAST); |
Byrn | 0:21cb91208386 | 135 | _send_command(0xCF); // chargepump, could be 0x9F for external 9V |
Byrn | 0:21cb91208386 | 136 | |
Byrn | 0:21cb91208386 | 137 | _send_command(0xA1); // setment remap 95 to 0 (??) |
Byrn | 0:21cb91208386 | 138 | |
Byrn | 0:21cb91208386 | 139 | invert(0); |
Byrn | 0:21cb91208386 | 140 | |
Byrn | 0:21cb91208386 | 141 | _send_command(SSD1306_DISPLAYALLON_RESUME); |
Byrn | 0:21cb91208386 | 142 | _send_command(SSD1306_SETMULTIPLEX); |
Byrn | 0:21cb91208386 | 143 | _send_command(0x3F); // 1/64 duty |
Byrn | 0:21cb91208386 | 144 | |
Byrn | 0:21cb91208386 | 145 | set_display_offset(0); |
Byrn | 0:21cb91208386 | 146 | |
Byrn | 0:21cb91208386 | 147 | _send_command(SSD1306_SETDISPLAYCLOCKDIV); |
Byrn | 0:21cb91208386 | 148 | _send_command(0x80); // suggested value = 0x80 |
Byrn | 0:21cb91208386 | 149 | _send_command(SSD1306_SETPRECHARGE); |
Byrn | 0:21cb91208386 | 150 | _send_command(0xF1); // dc/dc, could be 0x22 for external 9V |
Byrn | 0:21cb91208386 | 151 | _send_command(SSD1306_SETCOMPINS); |
Byrn | 0:21cb91208386 | 152 | _send_command(0x12); // disable COM left/right remap |
Byrn | 0:21cb91208386 | 153 | _send_command(SSD1306_SETVCOMDETECT); |
Byrn | 0:21cb91208386 | 154 | _send_command(0x40); // apparently, 0x20 is default... |
Byrn | 0:21cb91208386 | 155 | _send_command(SSD1306_MEMORYMODE); |
Byrn | 0:21cb91208386 | 156 | _send_command(0x0); // act like KS0108 |
Byrn | 0:21cb91208386 | 157 | |
Byrn | 0:21cb91208386 | 158 | // left-to-right scan |
Byrn | 0:21cb91208386 | 159 | _send_command(SSD1306_SEGREMAP | 0x1); |
Byrn | 0:21cb91208386 | 160 | _send_command(SSD1306_COMSCANDEC); |
Byrn | 0:21cb91208386 | 161 | _send_command(SSD1306_CHARGEPUMP); |
Byrn | 0:21cb91208386 | 162 | _send_command(0x14); // disable, for external 9v 0x10 disable |
Byrn | 1:1d58d378221c | 163 | */ |
Byrn | 0:21cb91208386 | 164 | // turn it on |
Byrn | 1:1d58d378221c | 165 | // on(); |
Byrn | 0:21cb91208386 | 166 | } |
Byrn | 0:21cb91208386 | 167 | |
Byrn | 0:21cb91208386 | 168 | void SSD1306::update() |
Byrn | 0:21cb91208386 | 169 | { |
Byrn | 0:21cb91208386 | 170 | set_low_column(0); |
Byrn | 0:21cb91208386 | 171 | set_high_column(0); |
Byrn | 0:21cb91208386 | 172 | set_start_line(0); |
Byrn | 0:21cb91208386 | 173 | |
Byrn | 0:21cb91208386 | 174 | for (int i = 0; i < 1024; i++) |
Byrn | 0:21cb91208386 | 175 | _send_data(_screen[i]); |
Byrn | 0:21cb91208386 | 176 | } |
Byrn | 0:21cb91208386 | 177 | |
Byrn | 0:21cb91208386 | 178 | void SSD1306::set_pixel(int x, int y) |
Byrn | 0:21cb91208386 | 179 | { |
Byrn | 0:21cb91208386 | 180 | if (x >= SSD1306_LCDWIDTH || y >= SSD1306_LCDHEIGHT) return; |
Byrn | 0:21cb91208386 | 181 | |
Byrn | 0:21cb91208386 | 182 | _screen[x + (y / 8) * 128] |= 1 << (y % 8); |
Byrn | 0:21cb91208386 | 183 | } |
Byrn | 0:21cb91208386 | 184 | |
Byrn | 0:21cb91208386 | 185 | void SSD1306::clear_pixel(int x, int y) |
Byrn | 0:21cb91208386 | 186 | { |
Byrn | 0:21cb91208386 | 187 | if (x >= SSD1306_LCDWIDTH || y >= SSD1306_LCDHEIGHT) return; |
Byrn | 0:21cb91208386 | 188 | |
Byrn | 0:21cb91208386 | 189 | _screen[x + (y / 8) * 128] &= ~(1 << (y % 8)); |
Byrn | 0:21cb91208386 | 190 | } |
Byrn | 0:21cb91208386 | 191 | |
Byrn | 0:21cb91208386 | 192 | void SSD1306::line(int x0, int y0, int x1, int y1) { |
Byrn | 0:21cb91208386 | 193 | int steep = abs(y1 - y0) > abs(x1 - x0); |
Byrn | 0:21cb91208386 | 194 | int t; |
Byrn | 0:21cb91208386 | 195 | |
Byrn | 0:21cb91208386 | 196 | if (steep) { |
Byrn | 0:21cb91208386 | 197 | t = x0; x0 = y0; y0 = t; |
Byrn | 0:21cb91208386 | 198 | t = x1; x1 = y1; y1 = t; |
Byrn | 0:21cb91208386 | 199 | } |
Byrn | 0:21cb91208386 | 200 | |
Byrn | 0:21cb91208386 | 201 | if (x0 > x1) { |
Byrn | 0:21cb91208386 | 202 | t = x0; x0 = x1; x1 = t; |
Byrn | 0:21cb91208386 | 203 | t = y0; y0 = y1; y1 = t; |
Byrn | 0:21cb91208386 | 204 | } |
Byrn | 0:21cb91208386 | 205 | |
Byrn | 0:21cb91208386 | 206 | int dx, dy; |
Byrn | 0:21cb91208386 | 207 | |
Byrn | 0:21cb91208386 | 208 | dx = x1 - x0; |
Byrn | 0:21cb91208386 | 209 | dy = abs(y1 - y0); |
Byrn | 0:21cb91208386 | 210 | |
Byrn | 0:21cb91208386 | 211 | int err = dx / 2; |
Byrn | 0:21cb91208386 | 212 | int ystep; |
Byrn | 0:21cb91208386 | 213 | |
Byrn | 0:21cb91208386 | 214 | if (y0 < y1) { |
Byrn | 0:21cb91208386 | 215 | ystep = 1; |
Byrn | 0:21cb91208386 | 216 | } else { |
Byrn | 0:21cb91208386 | 217 | ystep = -1;} |
Byrn | 0:21cb91208386 | 218 | |
Byrn | 0:21cb91208386 | 219 | for (; x0<x1; x0++) { |
Byrn | 0:21cb91208386 | 220 | if (steep) { |
Byrn | 0:21cb91208386 | 221 | set_pixel(y0, x0); |
Byrn | 0:21cb91208386 | 222 | } else { |
Byrn | 0:21cb91208386 | 223 | set_pixel(x0, y0); |
Byrn | 0:21cb91208386 | 224 | } |
Byrn | 0:21cb91208386 | 225 | err -= dy; |
Byrn | 0:21cb91208386 | 226 | if (err < 0) { |
Byrn | 0:21cb91208386 | 227 | y0 += ystep; |
Byrn | 0:21cb91208386 | 228 | err += dx; |
Byrn | 0:21cb91208386 | 229 | } |
Byrn | 0:21cb91208386 | 230 | } |
Byrn | 0:21cb91208386 | 231 | } |
Byrn | 0:21cb91208386 | 232 | |
Byrn | 0:21cb91208386 | 233 | void SSD1306::draw_string(char *font, int x, int y, const char *string) |
Byrn | 0:21cb91208386 | 234 | { |
Byrn | 0:21cb91208386 | 235 | _cursor_x = x; |
Byrn | 0:21cb91208386 | 236 | _cursor_y = y; |
Byrn | 0:21cb91208386 | 237 | |
Byrn | 0:21cb91208386 | 238 | for (int i = 0; i < strlen(string); i++) |
Byrn | 0:21cb91208386 | 239 | draw_char(font, _cursor_x, _cursor_y, string[i]); |
Byrn | 0:21cb91208386 | 240 | } |
Byrn | 0:21cb91208386 | 241 | |
Byrn | 0:21cb91208386 | 242 | void SSD1306::draw_char(char *font, int x, int y, char c) |
Byrn | 0:21cb91208386 | 243 | { |
Byrn | 0:21cb91208386 | 244 | int height = font[FONT_HEIGHT_OFFSET]; |
Byrn | 0:21cb91208386 | 245 | int max_width = font[FONT_SIZE_OFFSET]; |
Byrn | 0:21cb91208386 | 246 | int char_size_bytes = max_width * height + 1; |
Byrn | 0:21cb91208386 | 247 | int char_width = font[(c - FONT_START) * char_size_bytes + FONT_DATA_OFFSET]; |
Byrn | 0:21cb91208386 | 248 | for (int i = 0; i < char_width; i++) |
Byrn | 0:21cb91208386 | 249 | _screen[(x + i) + (y * SSD1306_LCDWIDTH)] = font[(c - FONT_START) * (char_size_bytes) + i + FONT_DATA_OFFSET + 1]; |
Byrn | 0:21cb91208386 | 250 | |
Byrn | 0:21cb91208386 | 251 | _cursor_x = x + char_width; |
Byrn | 0:21cb91208386 | 252 | _cursor_y = y; |
Byrn | 0:21cb91208386 | 253 | } |
Byrn | 0:21cb91208386 | 254 | |
Byrn | 0:21cb91208386 | 255 | void SSD1306::clear() |
Byrn | 0:21cb91208386 | 256 | { |
Byrn | 0:21cb91208386 | 257 | for (int i = 0; i < 1024; i++) |
Byrn | 0:21cb91208386 | 258 | _screen[i] = 0; |
Byrn | 0:21cb91208386 | 259 | } |
Byrn | 0:21cb91208386 | 260 | |
Byrn | 1:1d58d378221c | 261 | void SSD1306::_send_command(unsigned char code) |
Byrn | 0:21cb91208386 | 262 | { |
Byrn | 0:21cb91208386 | 263 | _cs = 1; |
Byrn | 0:21cb91208386 | 264 | _dc = 0; |
Byrn | 0:21cb91208386 | 265 | _cs = 0; |
Byrn | 0:21cb91208386 | 266 | _spi.write(code); |
Byrn | 0:21cb91208386 | 267 | _cs = 1; |
Byrn | 0:21cb91208386 | 268 | } |
Byrn | 0:21cb91208386 | 269 | |
Byrn | 1:1d58d378221c | 270 | void SSD1306::_send_data(unsigned char value) |
Byrn | 0:21cb91208386 | 271 | { |
Byrn | 0:21cb91208386 | 272 | _cs = 1; |
Byrn | 0:21cb91208386 | 273 | _dc = 1; |
Byrn | 0:21cb91208386 | 274 | _cs = 0; |
Byrn | 0:21cb91208386 | 275 | _spi.write(value); |
Byrn | 0:21cb91208386 | 276 | _cs = 1; |
Byrn | 0:21cb91208386 | 277 | } |
Byrn | 0:21cb91208386 | 278 |