Display control code

components/oled/include/ssd1306.h

@@ -0,0 +1,45 @@
+#ifndef SSD_1306_H
+#define SSD_1306_H
+
+// From http://robotcantalk.blogspot.com/2015/03/interfacing-arduino-with-ssd1306-driven.html
+
+// SLA (0x3C) + WRITE_MODE (0x00) =  0x78 (0b01111000)
+#define OLED_I2C_ADDRESS   0x3C
+
+// Control byte
+#define OLED_CONTROL_BYTE_CMD_SINGLE    0x80
+#define OLED_CONTROL_BYTE_CMD_STREAM    0x00
+#define OLED_CONTROL_BYTE_DATA_STREAM   0x40
+
+// Fundamental commands (pg.28)
+#define OLED_CMD_SET_CONTRAST           0x81    // follow with 0x7F
+#define OLED_CMD_DISPLAY_RAM            0xA4
+#define OLED_CMD_DISPLAY_ALLON          0xA5
+#define OLED_CMD_DISPLAY_NORMAL         0xA6
+#define OLED_CMD_DISPLAY_INVERTED       0xA7
+#define OLED_CMD_DISPLAY_OFF            0xAE
+#define OLED_CMD_DISPLAY_ON             0xAF
+
+// Addressing Command Table (pg.30)
+#define OLED_CMD_SET_MEMORY_ADDR_MODE   0x20    // follow with 0x00 = HORZ mode = Behave like a KS108 graphic LCD
+#define OLED_CMD_SET_COLUMN_RANGE       0x21    // can be used only in HORZ/VERT mode - follow with 0x00 and 0x7F = COL127
+#define OLED_CMD_SET_PAGE_RANGE         0x22    // can be used only in HORZ/VERT mode - follow with 0x00 and 0x07 = PAGE7
+
+// Hardware Config (pg.31)
+#define OLED_CMD_SET_DISPLAY_START_LINE 0x40
+#define OLED_CMD_SET_SEGMENT_REMAP      0xA1
+#define OLED_CMD_SET_MUX_RATIO          0xA8    // follow with 0x3F = 64 MUX
+#define OLED_CMD_SET_COM_SCAN_MODE      0xC8
+#define OLED_CMD_SET_DISPLAY_OFFSET     0xD3    // follow with 0x00
+#define OLED_CMD_SET_COM_PIN_MAP        0xDA    // follow with 0x12
+#define OLED_CMD_NOP                    0xE3    // NOP
+
+// Timing and Driving Scheme (pg.32)
+#define OLED_CMD_SET_DISPLAY_CLK_DIV    0xD5    // follow with 0x80
+#define OLED_CMD_SET_PRECHARGE          0xD9    // follow with 0xF1
+#define OLED_CMD_SET_VCOMH_DESELCT      0xDB    // follow with 0x30
+
+// Charge Pump (pg.62)
+#define OLED_CMD_SET_CHARGE_PUMP        0x8D    // follow with 0x14
+
+#endif // SSD_1306_H