platform.c

/*
    MIT License

    Copyright (c) 2018, 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.
*/

#include "ssd1306_hal/io.h"

#if defined(__AVR__) && !defined(ARDUINO)

void delay(unsigned long ms)
{
    while (ms--)
    {
        _delay_ms(1);
    }
}

#if defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
    #define G0_DIR  DDRB
    #define G0_PORT PORTB
    #define G1_DIR  DDRB
    #define G1_PORT PORTB
    #define G2_DIR  DDRB
    #define G2_PORT PORTB
#elif defined(__AVR_ATmega328P__)
    #define G0_DIR  DDRD
    #define G0_PORT PORTD
    #define G1_DIR  DDRB
    #define G1_PORT PORTB
    #define G2_DIR  DDRC
    #define G2_PORT PORTC
#else
    static uint8_t s_stub;
    #define G0_DIR  s_stub
    #define G0_PORT s_stub
    #define G1_DIR  s_stub
    #define G1_PORT s_stub
    #define G2_DIR  s_stub
    #define G2_PORT s_stub
#endif

void digitalWrite(int pin, int level)
{
    uint8_t mask = (1<<(pin & 0x7));
    if (pin<8)
    {
        if (level == HIGH) G0_PORT |= mask; else G0_PORT &= ~mask;
    }
    else if (pin<16)
    {
        if (level == HIGH) G1_PORT |= mask; else G1_PORT &= ~mask;
    }
    else
    {
        if (level == HIGH) G2_PORT |= mask; else G2_PORT &= ~mask;
    }
}

void pinMode(int pin, int mode)
{
    uint8_t mask = (1<<(pin & 0x7));
    if (pin<8)
    {
        if (mode == OUTPUT) G0_DIR |= mask; else G0_DIR &= ~mask;
    }
    else if (pin<16)
    {
        if (mode == OUTPUT) G1_DIR |= mask; else G1_DIR &= ~mask;
    }
    else
    {
        if (mode == OUTPUT) G2_DIR |= mask; else G2_DIR &= ~mask;
    }
};

#endif