io.h

/*
    MIT License

    Copyright (c) 2018-2019, Alexey Dynda

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in all
    copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    SOFTWARE.
*/

/*
 * @file ssd1306_hal/avr/io.h SSD1306 AVR IO communication functions
 */

#ifndef _SSD1306_AVR_IO_H_
#define _SSD1306_AVR_IO_H_

#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include <avr/sleep.h>
#include <avr/eeprom.h>
#include <util/delay.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>

#define LOW  0
#define HIGH 1
#define INPUT 0
#define OUTPUT 1

#if defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__) || \
    defined(__AVR_ATtiny24__) || defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__)

    #define CONFIG_SOFTWARE_I2C_AVAILABLE

    #define CONFIG_USI_SPI_AVAILABLE
    /* Define lcdint as smallest types to reduce memo usage on tiny controllers. *
     * Remember, that this can cause issues with large lcd displays, i.e. 320x240*/
    #define LCDINT_TYPES_DEFINED
    typedef int8_t lcdint_t;
    typedef uint8_t lcduint_t;
    #define CONFIG_MULTIPLICATION_NOT_SUPPORTED
#elif defined(__AVR_ATmega328P__)

    #define CONFIG_SOFTWARE_I2C_AVAILABLE

    #define CONFIG_TWI_I2C_AVAILABLE

    #define CONFIG_AVR_SPI_AVAILABLE

    #define CONFIG_AVR_UART_AVAILABLE

    #define CONFIG_VGA_AVAILABLE

#elif defined(__AVR_ATmega2560__) || defined(__AVR_ATmega1280__)

    #define CONFIG_SOFTWARE_I2C_AVAILABLE

    #define CONFIG_TWI_I2C_AVAILABLE

    #define CONFIG_AVR_SPI_AVAILABLE

#else

    #define CONFIG_SOFTWARE_I2C_AVAILABLE

    #define CONFIG_TWI_I2C_AVAILABLE

    #define CONFIG_AVR_SPI_AVAILABLE
#endif

#ifdef __cplusplus
extern "C" {
#endif

// not implemented functions for plain AVR
static inline int  digitalRead(int pin) { return LOW; };
static inline int  analogRead(int pin) { return 0; };
static inline uint32_t millis() { return 0; };
static inline void randomSeed(int seed) { };
static inline void attachInterrupt(int pin, void (*interrupt)(), int level) { };

// implemented functions for plain AVR
void delay(unsigned long ms);
#define delayMicroseconds(us)  _delay_us(us)

void digitalWrite(int pin, int level);
void pinMode(int pin, int mode);

#ifdef __cplusplus
}
#endif

#ifdef __cplusplus
static inline int random(int max) { return 0; };
static inline int random(int min, int max) { return 0; };
#endif

#endif