gadget-tester/display.h

#ifndef DISPLAY_H_INCLUDED
#define DISPLAY_H_INCLUDED
#include <stdint.h>

#define WIDTH 128
#define PIXEL_HEIGHT 64
#define HEIGHT (PIXEL_HEIGHT / 8)
extern const unsigned char fb_font[256][8];
#define SSD1306_MEMORYMODE                              0x20
#define SSD1306_COLUMNADDR                              0x21
#define SSD1306_PAGEADDR                                0x22
#define SSD1306_SETCONTRAST                             0x81
#define SSD1306_CHARGEPUMP                              0x8D
#define SSD1306_SEGREMAP                                0xA0
#define SSD1306_DISPLAYALLON_RESUME                     0xA4
#define SSD1306_DISPLAYALLON                            0xA5
#define SSD1306_NORMALDISPLAY                           0xA6
#define SSD1306_INVERTDISPLAY                           0xA7
#define SSD1306_SETMULTIPLEX                            0xA8
#define SSD1306_DISPLAYOFF                              0xAE
#define SSD1306_DISPLAYON                               0xAF
#define SSD1306_COMSCANINC                              0xC0
#define SSD1306_COMSCANDEC                              0xC8
#define SSD1306_SETDISPLAYOFFSET                        0xD3
#define SSD1306_SETDISPLAYCLOCKDIV                      0xD5
#define SSD1306_SETPRECHARGE                            0xD9
#define SSD1306_SETCOMPINS                              0xDA
#define SSD1306_SETVCOMDETECT                           0xDB
#define SSD1306_SETLOWCOLUMN                            0x00
#define SSD1306_SETHIGHCOLUMN                           0x10
#define SSD1306_SETSTARTLINE                            0x40
#define SSD1306_RIGHT_HORIZONTAL_SCROLL                 0x26
#define SSD1306_LEFT_HORIZONTAL_SCROLL                  0x27
#define SSD1306_VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL    0x29
#define SSD1306_VERTICAL_AND_LEFT_HORIZONTAL_SCROLL     0x2A
#define SSD1306_DEACTIVATE_SCROLL                       0x2E
#define SSD1306_ACTIVATE_SCROLL                         0x2F
#define SSD1306_SET_VERTICAL_SCROLL_AREA                0xA3



/* driver module plug-in (SPI or I2C) */
void display_send_data(void *priv, const uint8_t *buf, int len);
void display_send_cmd(void *priv, uint8_t cmd);
void display_send_cmd1(void *priv, uint8_t cmd, uint8_t arg1);
void display_send_cmd2(void *priv, uint8_t cmd, uint8_t arg1, uint8_t arg2);

int display_init(void *priv);
void display_text(int row, const char *text);
void display_text_inverse(int row, const char *text);
void display_scroll(void *priv, uint8_t line);
void display_setcontrast(void *priv, uint8_t c);
uint8_t display_getcontrast(void *priv);
void display_clear(void *priv);
    
#endif