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U8glib-HAL

u8g by Oliver Kraus with extensions for ARM and HAL

The extensions allow access to the u8g library by "non native" CPUs/systems.

AVR, Arduino & Due access to the library is not changed.

Enabling the extensions is done by defining the flag U8G_HAL_LINKS. In platformio.ini this can be done by adding the build flag -DU8G_HAL_LINKS

The following files provide the links between the u8g library and the "non native" CPUs/systems.

#include <HAL_LCD_defines.h>

HAL_LCD_defines.h pulls in the top level link file. The top level link file has the following functions:

  • Defines the names of the link files for SPI routines, delay routines, I2C routines and class definitions.
  • Connect u8g com generic com defines to the desired HAL com routine.

#include HAL_LCD_delay

Contains code or declarations for the u8g routines:

  • void U8g_delay(int msec);
  • void u8g_MicroDelay(void);
  • void u8g_10MicroDelay(void);

#include HAL_LCD_pin_routines

Contains code or declarations for the u8g routines:

  • void u8g_SetPinOutput(uint8_t internal_pin_number);
  • void u8g_SetPinInput(uint8_t internal_pin_number);
  • void u8g_SetPinLevel(uint8_t pin, uint8_t pin_status);
  • uint8_t u8g_GetPinLevel(uint8_t pin);

#include HAL_LCD_I2C_routines

Contains code or declarations for the u8g routines:

  • void u8g_i2c_init(uint8_t options);
  • uint8_t u8g_i2c_wait(uint8_t mask, uint8_t pos);
  • uint8_t u8g_i2c_start(uint8_t sla);
  • uint8_t u8g_i2c_send_byte(uint8_t data);
  • void u8g_i2c_stop(void);