/** \file

  \brief Display bus broker.

  Here we map generic calls to the display bus to calls to the actually used
  bus.
*/

#ifndef _DISPLAYBUS_H
#define _DISPLAYBUS_H

#include "config_wrapper.h"

#if defined DISPLAY_BUS_4BIT

  #error Display connected directly via 4 pins is not yet supported.

#elif defined DISPLAY_BUS_8BIT

  #error Display connected directly via 8 pins is not yet supported.

#elif defined DISPLAY_BUS_I2C

  #include "i2c.h"

  static void displaybus_init(uint8_t address) __attribute__ ((always_inline));
  inline void displaybus_init(uint8_t address) {
    return i2c_init(address);
  }

  static uint8_t displaybus_busy(void) __attribute__ ((always_inline));
  inline uint8_t displaybus_busy(void) {
    return i2c_busy();
  }

  static void displaybus_write(uint8_t data, uint8_t last_byte) \
    __attribute__ ((always_inline));
  inline void displaybus_write(uint8_t data, uint8_t last_byte) {
    return i2c_write(data, last_byte);
  }

  #define DISPLAY_BUS

#elif defined DISPLAY_BUS_SPI

  #error Display connected via SPI not yet supported.

#endif

#endif /* _DISPLAYBUS_H */