library

/*! \file avrcore.c \brief AVR-Core Board Driver Functions. */
//*****************************************************************************
//
// File Name    : 'avrcore.c'
// Title                : AVR-Core Board Driver Functions
// Author               : Pascal Stang - Copyright (C) 2004
// Created              : 2004.10.1
// Revised              : 2004.10.1
// Version              : 0.1
// Target MCU   : Atmel AVR series
// Editor Tabs  : 4
//
// This code is distributed under the GNU Public License
//              which can be found at http://www.gnu.org/licenses/gpl.txt
//
//*****************************************************************************

//----- Include Files ---------------------------------------------------------
#include <avr/io.h>             // include I/O definitions (port names, pin names, etc)
#include <avr/interrupt.h>      // include interrupt support

#include "global.h"             // include our global settings
#include "avrcore.h"

// globals
u08 AvrcoreLatch;

// functions
void avrcoreInit(void)
{
        // initialize ports to input with pullup
        // (this is done to avoid contentions and input-pin oscillation)
        outb(DDRA, 0x00);
        outb(DDRB, 0x00);
        outb(DDRC, 0x00);
        outb(DDRD, 0x00);
        outb(DDRE, 0x00);
        outb(DDRF, 0x00);
        outb(PORTA, 0xFF);
        outb(PORTB, 0xFF);
        outb(PORTC, 0xFF);
        outb(PORTD, 0xFF);
        outb(PORTE, 0xFF);
        outb(PORTF, 0xFF);
        // turn on RAM interface
        sbi(MCUCR, SRE);
        // initialize RAM page
        avrcoreSetRamPage(0);
        // initialize LEDs
        avrcoreSetLeds(0);
        // set serial power to on by default
        avrcoreSetSerialPortPower(1);
}

void avrcoreSetRamPage(u08 page)
{
        // update latch state
        AvrcoreLatch &= ~AVRCORELATCH_ADDRMASK;
        AvrcoreLatch |= page & AVRCORELATCH_ADDRMASK;
        // write new latch state to latch
        AVRCORELATCH = AvrcoreLatch;
}

void avrcoreSetLeds(u08 leds)
{
        // NOTE: LEDs are negative-logic (active-low)
        // update latch state
        AvrcoreLatch |= AVRCORELATCH_LEDMASK;
        AvrcoreLatch &= ~(leds<<4);
        // write new latch state to latch
        AVRCORELATCH = AvrcoreLatch;
}

void avrcoreSetLedsOn(u08 leds)
{
        // NOTE: LEDs are negative-logic (active-low)
        // update latch state to turn on inidicated leds
        AvrcoreLatch &= ~(leds<<4);
        // write new latch state to latch
        AVRCORELATCH = AvrcoreLatch;
}

void avrcoreSetLedsOff(u08 leds)
{
        // NOTE: LEDs are negative-logic (active-low)
        // update latch state to turn off inidicated leds
        AvrcoreLatch |= (leds<<4);
        // write new latch state to latch
        AVRCORELATCH = AvrcoreLatch;
}

void avrcoreSetSerialPortPower(u08 on)
{
        // this function simply manipulates LED3/power control
        if(on)
                AvrcoreLatch &= ~(0x80);
        else
                AvrcoreLatch |= (0x80);
        // write new latch state to latch
        AVRCORELATCH = AvrcoreLatch;
}