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ssd1306.h@6:f552ca0f5165, 2017-12-18 (annotated)

Committer:
ramialjed
Date:
Mon Dec 18 14:00:21 2017 +0000
Revision:
6:f552ca0f5165
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ramialjed 6:f552ca0f5165 1 #ifndef __SSD1306_H__
ramialjed 6:f552ca0f5165 2 #define __SSD1306_H__
ramialjed 6:f552ca0f5165 3
ramialjed 6:f552ca0f5165 4 #define FONT_START ' ' /* First character value in the font table */
ramialjed 6:f552ca0f5165 5
ramialjed 6:f552ca0f5165 6 /** SSD1306 Controller Driver
ramialjed 6:f552ca0f5165 7 *
ramialjed 6:f552ca0f5165 8 * This class provides a buffered display for the SSD1306 OLED controller.
ramialjed 6:f552ca0f5165 9 *
ramialjed 6:f552ca0f5165 10 * TODO:
ramialjed 6:f552ca0f5165 11 * - At the moment, the driver assumes a 128x64 pixel display.
ramialjed 6:f552ca0f5165 12 * - Only fonts of 8 pixel height are supported (different widths can be used).
ramialjed 6:f552ca0f5165 13 * - Pretty much no drawing functions are provided as yet.
ramialjed 6:f552ca0f5165 14 * - Possible "auto-update", automatically calling update() after a printf etc.
ramialjed 6:f552ca0f5165 15 *
ramialjed 6:f552ca0f5165 16 * Information taken from the datasheet at:
ramialjed 6:f552ca0f5165 17 * http://www.adafruit.com/datasheets/SSD1306.pdf
ramialjed 6:f552ca0f5165 18 *
ramialjed 6:f552ca0f5165 19 */
ramialjed 6:f552ca0f5165 20 class SSD1306
ramialjed 6:f552ca0f5165 21 {
ramialjed 6:f552ca0f5165 22 public:
ramialjed 6:f552ca0f5165 23 /** Construct a new SSD1306 object.
ramialjed 6:f552ca0f5165 24 * @param cs The connected C/S pin.
ramialjed 6:f552ca0f5165 25 * @param rs The connected RS pin.
ramialjed 6:f552ca0f5165 26 * @param dc The connected DC pin.
ramialjed 6:f552ca0f5165 27 * @param clk The connected CLK pin.
ramialjed 6:f552ca0f5165 28 * @param data The connected Data pin.
ramialjed 6:f552ca0f5165 29 */
ramialjed 6:f552ca0f5165 30 SSD1306(PinName cs, PinName rs, PinName dc, PinName clk, PinName data);
ramialjed 6:f552ca0f5165 31
ramialjed 6:f552ca0f5165 32 // ----- HARDWARE CONTROL -----
ramialjed 6:f552ca0f5165 33
ramialjed 6:f552ca0f5165 34 /** Initialise the display with defaults.*/
ramialjed 6:f552ca0f5165 35 void initialise();
ramialjed 6:f552ca0f5165 36
ramialjed 6:f552ca0f5165 37 /** Force a refresh of the display. Copies the buffer to the controller. */
ramialjed 6:f552ca0f5165 38 void update();
ramialjed 6:f552ca0f5165 39
ramialjed 6:f552ca0f5165 40 /** Turn the whole display off. This will reset all configuration settings on the controller to their defaults. */
ramialjed 6:f552ca0f5165 41 void off();
ramialjed 6:f552ca0f5165 42
ramialjed 6:f552ca0f5165 43 /** Turn the whole display on. Used during initialisation. */
ramialjed 6:f552ca0f5165 44 void on();
ramialjed 6:f552ca0f5165 45
ramialjed 6:f552ca0f5165 46 /** Sends the display to sleep, but leaves RAM intact. */
ramialjed 6:f552ca0f5165 47 void sleep();
ramialjed 6:f552ca0f5165 48
ramialjed 6:f552ca0f5165 49 /** Wakes up this display following a sleep() call.
ramialjed 6:f552ca0f5165 50 * @see sleep()
ramialjed 6:f552ca0f5165 51 */
ramialjed 6:f552ca0f5165 52 void wake();
ramialjed 6:f552ca0f5165 53
ramialjed 6:f552ca0f5165 54 /** Set the display contrast.
ramialjed 6:f552ca0f5165 55 * @param value The contrast, from 1 to 256.
ramialjed 6:f552ca0f5165 56 */
ramialjed 6:f552ca0f5165 57 void set_contrast(unsigned char value); // 1-256
ramialjed 6:f552ca0f5165 58
ramialjed 6:f552ca0f5165 59 /** Set the display to normal or inverse.
ramialjed 6:f552ca0f5165 60 * @param value 0 for normal mode, or 1 for inverse mode.
ramialjed 6:f552ca0f5165 61 */
ramialjed 6:f552ca0f5165 62 void set_inverse(unsigned char value); // 0 or 1
ramialjed 6:f552ca0f5165 63
ramialjed 6:f552ca0f5165 64 /** Set the display start line. This is the line at which the display will start rendering.
ramialjed 6:f552ca0f5165 65 * @param value A value from 0 to 63 denoting the line to start at.
ramialjed 6:f552ca0f5165 66 */
ramialjed 6:f552ca0f5165 67 void set_display_start_line(unsigned char value); // 0-63
ramialjed 6:f552ca0f5165 68
ramialjed 6:f552ca0f5165 69 /** Set the segment remap state. This allows the module to be addressed as if flipped horizontally.
ramialjed 6:f552ca0f5165 70 * NOTE: Changing this setting has no effect on data already in the module's GDDRAM.
ramialjed 6:f552ca0f5165 71 * @param value 0 = column address 0 = segment 0 (the default), 1 = column address 127 = segment 0 (flipped).
ramialjed 6:f552ca0f5165 72 */
ramialjed 6:f552ca0f5165 73 void set_segment_remap(unsigned char value); // 0 or 1
ramialjed 6:f552ca0f5165 74
ramialjed 6:f552ca0f5165 75 /** Set the vertical shift by COM.
ramialjed 6:f552ca0f5165 76 * @param value The number of rows to shift, from 0 - 63.
ramialjed 6:f552ca0f5165 77 */
ramialjed 6:f552ca0f5165 78 void set_display_offset(unsigned char value); // 0-63
ramialjed 6:f552ca0f5165 79
ramialjed 6:f552ca0f5165 80 /** Set the multiplex ratio.
ramialjed 6:f552ca0f5165 81 * @param value MUX will be set to (value+1). Valid values range from 15 to 63 - MUX 16 to 64.
ramialjed 6:f552ca0f5165 82 */
ramialjed 6:f552ca0f5165 83 void set_multiplex_ratio(unsigned char value); // 15-63 (value+1 mux)
ramialjed 6:f552ca0f5165 84
ramialjed 6:f552ca0f5165 85 /** Set COM output scan direction. If the display is active, this will immediately vertically
ramialjed 6:f552ca0f5165 86 * flip the display.
ramialjed 6:f552ca0f5165 87 * @param value 0 = Scan from COM0 (default), 1 = reversed (scan from COM[N-1]).
ramialjed 6:f552ca0f5165 88 */
ramialjed 6:f552ca0f5165 89 void set_com_output_scan_direction(unsigned char value); // 0 or 1
ramialjed 6:f552ca0f5165 90
ramialjed 6:f552ca0f5165 91 /** Set COM pins hardware configuration.
ramialjed 6:f552ca0f5165 92 * @param sequential 0 = Sequental COM pin configuration, 1 = Alternative COM pin configuration (default).
ramialjed 6:f552ca0f5165 93 * @param lr_remap 0 = Disable COM left/right remap (default), 1 = enable COM left/right remap.
ramialjed 6:f552ca0f5165 94 */
ramialjed 6:f552ca0f5165 95 void set_com_pins_hardware_configuration(unsigned char sequential, unsigned char lr_remap); // 0 or 1 for both parametrs
ramialjed 6:f552ca0f5165 96
ramialjed 6:f552ca0f5165 97 /** Set up and start a continuous horizontal scroll.
ramialjed 6:f552ca0f5165 98 * Once you have set up the scrolling, you can deactivate it with stop_scroll().
ramialjed 6:f552ca0f5165 99 * @param direction 0 for right, 1 for left.
ramialjed 6:f552ca0f5165 100 * @param start Start page address, 0 - 5.
ramialjed 6:f552ca0f5165 101 * @param end End page address, 0 - 5.
ramialjed 6:f552ca0f5165 102 * @param interval Interval in frame frequency. Valid values are: 2, 3, 4, 5, 25, 64, 128, 256.
ramialjed 6:f552ca0f5165 103 * @see stop_scrol
ramialjed 6:f552ca0f5165 104 */
ramialjed 6:f552ca0f5165 105 void start_horizontal_scroll(unsigned char direction, unsigned char start, unsigned char end, unsigned char interval);
ramialjed 6:f552ca0f5165 106
ramialjed 6:f552ca0f5165 107 /** Set up and start a continuous horizontal and vertical scroll.
ramialjed 6:f552ca0f5165 108 * NOTE: No continuous vertical scroll is available.
ramialjed 6:f552ca0f5165 109 * Once you have set up the scrolling, you can deactivate it with stop_scroll().
ramialjed 6:f552ca0f5165 110 * @param direction 0 for vertical and right horizontal scroll, 1 for vertical and left horizontal scroll.
ramialjed 6:f552ca0f5165 111 * @param start Start page address, 0 - 5.
ramialjed 6:f552ca0f5165 112 * @param end End page address, 0 - 5.
ramialjed 6:f552ca0f5165 113 * @param interval Interval in frame frequency. Valid values are: 2, 3, 4, 5, 25, 64, 128, 256.
ramialjed 6:f552ca0f5165 114 * @param vertical_offset Offset of vertical scroll, 1 - 63.
ramialjed 6:f552ca0f5165 115 * @see stop_scroll
ramialjed 6:f552ca0f5165 116 */
ramialjed 6:f552ca0f5165 117 void start_vertical_and_horizontal_scroll(unsigned char direction, unsigned char start, unsigned char end, unsigned char interval, unsigned char vertical_offset);
ramialjed 6:f552ca0f5165 118
ramialjed 6:f552ca0f5165 119 /** Deactivate the continuous scroll set up with start_horizontal_scroll() or
ramialjed 6:f552ca0f5165 120 * start_vertical_and_horizontal_scroll().
ramialjed 6:f552ca0f5165 121 * @see set_horizontal_scroll, set_vertical_and_horizontal_scroll
ramialjed 6:f552ca0f5165 122 */
ramialjed 6:f552ca0f5165 123 void stop_scroll();
ramialjed 6:f552ca0f5165 124
ramialjed 6:f552ca0f5165 125 // ----- ADDRESSING -----
ramialjed 6:f552ca0f5165 126
ramialjed 6:f552ca0f5165 127 /** Set memory addressing mode to the given value.
ramialjed 6:f552ca0f5165 128 * @param mode 0 for Horizontal addressing mode, 1 for Vertical addressing mode, or 2 for Page addressing mode (PAM). 2 is the default.
ramialjed 6:f552ca0f5165 129 */
ramialjed 6:f552ca0f5165 130 void set_memory_addressing_mode(unsigned char mode);
ramialjed 6:f552ca0f5165 131
ramialjed 6:f552ca0f5165 132 /** Page Addressing Mode: Set the column start address register for
ramialjed 6:f552ca0f5165 133 * page addressing mode.
ramialjed 6:f552ca0f5165 134 * @param address The address (full byte).
ramialjed 6:f552ca0f5165 135 */
ramialjed 6:f552ca0f5165 136 void pam_set_start_address(unsigned char address);
ramialjed 6:f552ca0f5165 137
ramialjed 6:f552ca0f5165 138 /** Set the GDDRAM page start address for page addressing mode.
ramialjed 6:f552ca0f5165 139 * @param address The start page, 0 - 7.
ramialjed 6:f552ca0f5165 140 */
ramialjed 6:f552ca0f5165 141 void pam_set_page_start(unsigned char address);
ramialjed 6:f552ca0f5165 142
ramialjed 6:f552ca0f5165 143 /** Set page start and end address for horizontal/vertical addressing mode.
ramialjed 6:f552ca0f5165 144 * @param start The start page, 0 - 7.
ramialjed 6:f552ca0f5165 145 * @param end The end page, 0 - 7.
ramialjed 6:f552ca0f5165 146 */
ramialjed 6:f552ca0f5165 147 void hv_set_page_address(unsigned char start, unsigned char end);
ramialjed 6:f552ca0f5165 148
ramialjed 6:f552ca0f5165 149 /** Set column address range for horizontal/vertical addressing mode.
ramialjed 6:f552ca0f5165 150 * @param start Column start address, 0 - 127.
ramialjed 6:f552ca0f5165 151 * @param end Column end address, 0 - 127.
ramialjed 6:f552ca0f5165 152 */
ramialjed 6:f552ca0f5165 153 void hv_set_column_address(unsigned char start, unsigned char end);
ramialjed 6:f552ca0f5165 154
ramialjed 6:f552ca0f5165 155 // ----- TIMING & DRIVING -----
ramialjed 6:f552ca0f5165 156 /** Set the display clock divide ratio and the oscillator frequency.
ramialjed 6:f552ca0f5165 157 * @param ratio The divide ratio, default is 0.
ramialjed 6:f552ca0f5165 158 * @param frequency The oscillator frequency, 0 - 127. Default is 8.
ramialjed 6:f552ca0f5165 159 */
ramialjed 6:f552ca0f5165 160 void set_display_clock_ratio_and_frequency(unsigned char ratio, unsigned char frequency);
ramialjed 6:f552ca0f5165 161
ramialjed 6:f552ca0f5165 162 /** Set the precharge period.
ramialjed 6:f552ca0f5165 163 * @param phase1 Phase 1 period in DCLK clocks. 1 - 15, default is 2.
ramialjed 6:f552ca0f5165 164 * @param phase2 Phase 2 period in DCLK clocks. 1 - 15, default is 2.
ramialjed 6:f552ca0f5165 165 */
ramialjed 6:f552ca0f5165 166 void set_precharge_period(unsigned char phase1, unsigned char phase2);
ramialjed 6:f552ca0f5165 167
ramialjed 6:f552ca0f5165 168 /** Set the Vcomh deselect level.
ramialjed 6:f552ca0f5165 169 * @param level 0 = 0.65 x Vcc, 1 = 0.77 x Vcc (default), 2 = 0.83 x Vcc.
ramialjed 6:f552ca0f5165 170 */
ramialjed 6:f552ca0f5165 171 void set_vcomh_deselect_level(unsigned char level);
ramialjed 6:f552ca0f5165 172
ramialjed 6:f552ca0f5165 173 /** Perform a "no operation".
ramialjed 6:f552ca0f5165 174 */
ramialjed 6:f552ca0f5165 175 void nop();
ramialjed 6:f552ca0f5165 176
ramialjed 6:f552ca0f5165 177 /** Enable/disable charge pump.
ramialjed 6:f552ca0f5165 178 @param enable 0 to disable, 1 to enable the internal charge pump.
ramialjed 6:f552ca0f5165 179 */
ramialjed 6:f552ca0f5165 180 void set_charge_pump_enable(unsigned char enable);
ramialjed 6:f552ca0f5165 181
ramialjed 6:f552ca0f5165 182 // ----- BUFFER EDITING -----
ramialjed 6:f552ca0f5165 183
ramialjed 6:f552ca0f5165 184 void clear();
ramialjed 6:f552ca0f5165 185 void drawBitmap(int x, int y, const unsigned char *bitmap, int w, int h, int color = 1);
ramialjed 6:f552ca0f5165 186 void set_pixel(int x, int y);
ramialjed 6:f552ca0f5165 187 void clear_pixel(int x, int y);
ramialjed 6:f552ca0f5165 188 void line(int x0, int y0, int x1, int y1);
ramialjed 6:f552ca0f5165 189
ramialjed 6:f552ca0f5165 190 /** Set the current console font.
ramialjed 6:f552ca0f5165 191 * @param font Font data, layed out vertically!
ramialjed 6:f552ca0f5165 192 * @param width Width of the font characters in pixels.
ramialjed 6:f552ca0f5165 193 * Fonts are always (at present) 8 pixels in height.
ramialjed 6:f552ca0f5165 194 */
ramialjed 6:f552ca0f5165 195 void set_font(unsigned char *font, unsigned int width);
ramialjed 6:f552ca0f5165 196
ramialjed 6:f552ca0f5165 197 /** Set double height text output.
ramialjed 6:f552ca0f5165 198 * @param double_height If 1, calls to putc(), printf() etc will
ramialjed 6:f552ca0f5165 199 * result in text taking up 2 lines instead of 1.
ramialjed 6:f552ca0f5165 200 */
ramialjed 6:f552ca0f5165 201 void set_double_height_text(unsigned int double_height);
ramialjed 6:f552ca0f5165 202
ramialjed 6:f552ca0f5165 203 /** Put a single character to the screen buffer.
ramialjed 6:f552ca0f5165 204 * Repeated calls to putc() will cause the cursor to move across and
ramialjed 6:f552ca0f5165 205 * then down as needed, with scrolling.
ramialjed 6:f552ca0f5165 206 * @param c The character to write.
ramialjed 6:f552ca0f5165 207 */
ramialjed 6:f552ca0f5165 208 void putc(unsigned char c);
ramialjed 6:f552ca0f5165 209
ramialjed 6:f552ca0f5165 210 /** Print to the screen buffer.
ramialjed 6:f552ca0f5165 211 * printf() will wrap and scroll the screen as needed to display the text given.
ramialjed 6:f552ca0f5165 212 * @param format Format specifier, same as printf() in normal C.
ramialjed 6:f552ca0f5165 213 */
ramialjed 6:f552ca0f5165 214 void printf(const char *format, ...);
ramialjed 6:f552ca0f5165 215
ramialjed 6:f552ca0f5165 216 /** Scroll the screen buffer up by one line. */
ramialjed 6:f552ca0f5165 217 void scroll_up();
ramialjed 6:f552ca0f5165 218
ramialjed 6:f552ca0f5165 219 private:
ramialjed 6:f552ca0f5165 220 SPI _spi;
ramialjed 6:f552ca0f5165 221 DigitalOut _cs, _reset, _dc;
ramialjed 6:f552ca0f5165 222 unsigned char _screen[1024];
ramialjed 6:f552ca0f5165 223
ramialjed 6:f552ca0f5165 224 int _cursor_x, _cursor_y;
ramialjed 6:f552ca0f5165 225
ramialjed 6:f552ca0f5165 226 void _send_command(unsigned char code);
ramialjed 6:f552ca0f5165 227 void _send_data(unsigned char value);
ramialjed 6:f552ca0f5165 228
ramialjed 6:f552ca0f5165 229 unsigned char *_console_font_data;
ramialjed 6:f552ca0f5165 230 unsigned int _console_font_width;
ramialjed 6:f552ca0f5165 231 unsigned int _double_height_text;
ramialjed 6:f552ca0f5165 232 };
ramialjed 6:f552ca0f5165 233
ramialjed 6:f552ca0f5165 234 #define SSD1306_LCDWIDTH 128
ramialjed 6:f552ca0f5165 235 #define SSD1306_LCDHEIGHT 64
ramialjed 6:f552ca0f5165 236
ramialjed 6:f552ca0f5165 237 #endif