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  1. #ifndef SSD1306_H
  2. #define SSD1306_H
  3. #include <stdbool.h>
  4. #include <stdio.h>
  5. bool iota_gfx_init(void);
  6. void iota_gfx_task(void);
  7. bool iota_gfx_off(void);
  8. bool iota_gfx_on(void);
  9. void iota_gfx_flush(void);
  10. void iota_gfx_write_char(uint8_t c);
  11. void iota_gfx_write(const char *data);
  12. void iota_gfx_write_P(const char *data);
  13. void iota_gfx_clear_screen(void);
  14. #endif