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103 lines
2.7 KiB
C
Executable File
103 lines
2.7 KiB
C
Executable File
/*! \file avrcore.c \brief AVR-Core Board Driver Functions. */
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//*****************************************************************************
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//
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// File Name : 'avrcore.c'
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// Title : AVR-Core Board Driver Functions
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// Author : Pascal Stang - Copyright (C) 2004
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// Created : 2004.10.1
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// Revised : 2004.10.1
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// Version : 0.1
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// Target MCU : Atmel AVR series
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// Editor Tabs : 4
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//
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// This code is distributed under the GNU Public License
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// which can be found at http://www.gnu.org/licenses/gpl.txt
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//
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//*****************************************************************************
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//----- Include Files ---------------------------------------------------------
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#include <avr/io.h> // include I/O definitions (port names, pin names, etc)
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#include <avr/signal.h> // include "signal" names (interrupt names)
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#include <avr/interrupt.h> // include interrupt support
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#include "global.h" // include our global settings
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#include "avrcore.h"
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// globals
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u08 AvrcoreLatch;
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// functions
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void avrcoreInit(void)
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{
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// initialize ports to input with pullup
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// (this is done to avoid contentions and input-pin oscillation)
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outb(DDRA, 0x00);
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outb(DDRB, 0x00);
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outb(DDRC, 0x00);
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outb(DDRD, 0x00);
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outb(DDRE, 0x00);
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outb(DDRF, 0x00);
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outb(PORTA, 0xFF);
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outb(PORTB, 0xFF);
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outb(PORTC, 0xFF);
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outb(PORTD, 0xFF);
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outb(PORTE, 0xFF);
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outb(PORTF, 0xFF);
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// turn on RAM interface
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sbi(MCUCR, SRE);
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// initialize RAM page
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avrcoreSetRamPage(0);
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// initialize LEDs
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avrcoreSetLeds(0);
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// set serial power to on by default
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avrcoreSetSerialPortPower(1);
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}
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void avrcoreSetRamPage(u08 page)
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{
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// update latch state
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AvrcoreLatch &= ~AVRCORELATCH_ADDRMASK;
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AvrcoreLatch |= page & AVRCORELATCH_ADDRMASK;
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// write new latch state to latch
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AVRCORELATCH = AvrcoreLatch;
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}
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void avrcoreSetLeds(u08 leds)
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{
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// NOTE: LEDs are negative-logic (active-low)
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// update latch state
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AvrcoreLatch |= AVRCORELATCH_LEDMASK;
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AvrcoreLatch &= ~(leds<<4);
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// write new latch state to latch
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AVRCORELATCH = AvrcoreLatch;
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}
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void avrcoreSetLedsOn(u08 leds)
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{
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// NOTE: LEDs are negative-logic (active-low)
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// update latch state to turn on inidicated leds
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AvrcoreLatch &= ~(leds<<4);
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// write new latch state to latch
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AVRCORELATCH = AvrcoreLatch;
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}
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void avrcoreSetLedsOff(u08 leds)
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{
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// NOTE: LEDs are negative-logic (active-low)
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// update latch state to turn off inidicated leds
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AvrcoreLatch |= (leds<<4);
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// write new latch state to latch
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AVRCORELATCH = AvrcoreLatch;
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}
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void avrcoreSetSerialPortPower(u08 on)
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{
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// this function simply manipulates LED3/power control
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if(on)
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AvrcoreLatch &= ~(0x80);
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else
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AvrcoreLatch |= (0x80);
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// write new latch state to latch
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AVRCORELATCH = AvrcoreLatch;
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}
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