68 lines
2.5 KiB
C++
68 lines
2.5 KiB
C++
/*
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* Authors (alphabetical order)
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* - Bertrand Songis <bsongis@gmail.com>
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* - Bryan J. Rentoul (Gruvin) <gruvin@gmail.com>
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* - Cameron Weeks <th9xer@gmail.com>
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* - Erez Raviv
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* - Jean-Pierre Parisy
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* - Karl Szmutny <shadow@privy.de>
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* - Michael Blandford
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* - Michal Hlavinka
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* - Pat Mackenzie
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* - Philip Moss
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* - Rob Thomson
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* - Romolo Manfredini <romolo.manfredini@gmail.com>
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* - Thomas Husterer
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*
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* open9x is based on code named
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* gruvin9x by Bryan J. Rentoul: http://code.google.com/p/gruvin9x/,
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* er9x by Erez Raviv: http://code.google.com/p/er9x/,
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* and the original (and ongoing) project by
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* Thomas Husterer, th9x: http://code.google.com/p/th9x/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include "open9x.h"
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inline void board_init()
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{
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// Set up I/O port data directions and initial states
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DDRA = 0xff; PORTA = 0x00; // LCD data
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DDRB = 0x81; PORTB = 0x7e; //pullups keys+nc
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DDRC = 0x3e; PORTC = 0xc1; //pullups nc
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DDRD = 0x00; PORTD = 0xff; //pullups keys
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DDRE = (1<<OUT_E_BUZZER); PORTE = 0xff-(1<<OUT_E_BUZZER); //pullups + buzzer 0
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DDRF = 0x00; PORTF = 0x00; //anain
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DDRG = 0x14; PORTG = 0xfb; //pullups + SIM_CTL=1 = phonejack = ppm_in, Haptic output and off (0)
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ADMUX=ADC_VREF_TYPE;
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ADCSRA=0x85; // ADC enabled, pre-scaler division=32 (no interrupt, no auto-triggering)
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/**** Set up timer/counter 0 ****/
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#if defined (AUDIO)
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// TCNT0 10ms = 16MHz/1024/2(/78) periodic timer (for speaker tone generation)
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// Capture ISR 7812.5/second -- runs per-10ms code segment once every 78
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// cycles (9.984ms). Timer overflows at about 61Hz or once every 16ms.
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TCCR0 = (0b111 << CS00);// Norm mode, clk/1024
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OCR0 = 2;
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#else
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// TCNT0 10ms = 16MHz/1024/156 periodic timer (9.984ms)
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// (with 1:4 duty at 157 to average 10.0ms)
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// Timer overflows at about 61Hz or once every 16ms.
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TCCR0 = (0b111 << CS00);// Norm mode, clk/1024
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OCR0 = 156;
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#endif
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TIMSK |= (1<<OCIE0) | (1<<TOIE0); // Enable Output-Compare and Overflow interrrupts
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/********************************/
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}
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