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Initial Arduino IDE based on Processing.

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David A. Mellis
2005-08-25 21:06:28 +00:00
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230
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/*
BConstats.h - main definitions file for Wiring
Part of the Wiring project - http://wiring.processing.org
Copyright (c) 2003-04
Hernando Barragan, Interaction Design Institute Ivrea
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef BConstants_h
#define BConstants_h
#define PI (3.1415927)
#define HALF_PI (1.57079)
#define TWO_PI (6.2831854)
#define DEG_TO_RAD (0.01745329)
#define RAD_TO_DEG (57.2957786)
#define EPSILON (0.0001)
#define WPIN0 (1<<0)
#define WPIN1 (1<<1)
#define WPIN2 (1<<2)
#define WPIN3 (1<<3)
#define WPIN4 (1<<4)
#define WPIN5 (1<<5)
#define WPIN6 (1<<6)
#define WPIN7 (1<<7)
#define WPWMPIN5 (1<<5) // PINB5
#define WPWMPIN4 (1<<6) // PINB6
#define WPWMPIN3 (1<<7) // PINB7
#define WPWMPIN2 (1<<3) // PINE3
#define WPWMPIN1 (1<<4) // PINE4
#define WPWMPIN0 (1<<5) // PINE5
#define WPORTA PORTA
#define WPORTB PORTB
#define WPORTC PORTC
#define WPORTD PORTD
#define WPORTE PORTE
#define WPORTF PORTF
#define WPORTG PORTG
#define WPINA PINA
#define WPINB PINB
#define WPINC PINC
#define WPIND PIND
#define WPINE PINE
#define WPINF PINF
#define WPING PING
#define WDDRA DDRA
#define WDDRB DDRB
#define WDDRC DDRC
#define WDDRD DDRD
#define WDDRE DDRE
#define WDDRF DDRF
#define WDDRG DDRG
#define HIGH 0x1
#define LOW 0x0
#define INPUT 0x0
#define OUTPUT 0x1
#define true 0x1
#define false 0x0
#define CPU_FREQ 16000000L
#define TIMER0OVERFLOW_INT 0
#define TIMER0OUTCOMPARE_INT 1
#define TIMER1OVERFLOW_INT 2
#define TIMER1OUTCOMPAREA_INT 3
#define TIMER1OUTCOMPAREB_INT 4
#define TIMER1OUTCOMPAREC_INT 5
#define TIMER1INPUTCAPTURE_INT 6
#define TIMER2OVERFLOW_INT 7
#define TIMER2OUTCOMPARE_INT 8
#define TIMER3OVERFLOW_INT 9
#define TIMER3OUTCOMPAREA_INT 10
#define TIMER3OUTCOMPAREB_INT 11
#define TIMER3OUTCOMPAREC_INT 12
#define TIMER3INPUTCAPTURE_INT 13
#define TIMER_NUM_INTERRUPTS 14
#define TIMER_CLK_STOP 0x00
#define TIMER_CLK_DIV1 0x01
#define TIMER_CLK_DIV8 0x02
#define TIMER_CLK_DIV64 0x03
#define TIMER_CLK_DIV256 0x04
#define TIMER_CLK_DIV1024 0x05
#define TIMER_CLK_T_FALL 0x06
#define TIMER_CLK_T_RISE 0x07
#define TIMER_PRESCALE_MASK 0x07
#define TIMERRTC_CLK_STOP 0x00
#define TIMERRTC_CLK_DIV1 0x01
#define TIMERRTC_CLK_DIV8 0x02
#define TIMERRTC_CLK_DIV32 0x03
#define TIMERRTC_CLK_DIV64 0x04
#define TIMERRTC_CLK_DIV128 0x05
#define TIMERRTC_CLK_DIV256 0x06
#define TIMERRTC_CLK_DIV1024 0x07
#define TIMERRTC_PRESCALE_MASK 0x07
#define TIMER0PRESCALE TIMERRTC_CLK_DIV64
#define TIMER1PRESCALE TIMER_CLK_DIV64
#define TIMER2PRESCALE TIMER_CLK_DIV8
#define TIMER3PRESCALE TIMER_CLK_DIV64
volatile struct {
uint8_t rx_int : 1;
uint8_t uart0_tx_complete : 1;
uint8_t uart1_tx_complete : 1;
} event;
typedef struct ringbuf_t {
uint16_t buflen;
uint16_t bufcnt;
uint8_t * in;
uint8_t * out;
uint8_t * buf;
} RINGBUF;
typedef uint8_t boolean;
typedef uint8_t byte;
int serial;
#define DEF_UART 0
#define AUX_UART 1
#define UART_BUF_LEN 32
#define min(a,b) ((a<b)?(a):(b))
#define max(a,b) ((a>b)?(a):(b))
#define abs(x) ((x>0)?(x):(-x))
#define constrain(amt,low,high) ((amt<low)?(low):((amt>high)?(high):(amt)))
#define radians(deg) ((deg)*DEG_TO_RAD)
#define degrees(rad) ((rad)*RAD_TO_DEG)
#define sq(x) ((x)*(x))
#define SERVO_NUM_CHANNELS 8
#define SERVO_MAX 142
#define SERVO_MIN 34
#define POSITION_MAX 255
#define SERVO_DEFAULT_PORT PORTA
static char uart_buffer[UART_BUF_LEN];
RINGBUF uartbuf;
typedef void (*voidFuncPtru08)(void);
volatile static voidFuncPtru08 UartRxFunc;
typedef void (*voidFuncPtr)(void);
#define WD_CTRL_PORT PORTC
#define WD_CTRL_DDR DDRC
#define WD_CTRL_RS 0
#define WD_CTRL_RW 1
#define WD_CTRL_E 2
#define WD_DATA_POUT PORTA
#define WD_DATA_PIN PINA
#define WD_DATA_DDR DDRA
#define WD_LINE0_DDRAMADDR 0x00
#define WD_LINE1_DDRAMADDR 0x40
#define WD_LINE2_DDRAMADDR 0x14
#define WD_LINE3_DDRAMADDR 0x54
#define WD_CLR 0
#define WD_HOME 1
#define WD_ENTRY_MODE 2
#define WD_ENTRY_INC 1
#define WD_ENTRY_SHIFT 0
#define WD_ON_CTRL 3
#define WD_ON_DISPLAY 2
#define WD_ON_CURSOR 1
#define WD_ON_BLINK 0
#define WD_MOVE 4
#define WD_MOVE_DISP 3
#define WD_MOVE_RIGHT 2
#define WD_FUNCTION 5
#define WD_FUNCTION_8BIT 4
#define WD_FUNCTION_2LINES 3
#define WD_FUNCTION_10DOTS 2
#define WD_CGRAM 6
#define WD_DDRAM 7
#define WD_BUSY 7
#define DATA_8_BITS 0x0
#define DATA_4_BITS 0x1
#define SERIAL 0x0
#define DISPLAY 0x1
#define EXTERNAL_NUM_INTERRUPTS 8
#define NUM_ENCODERS 4
#define EXTERNAL_INT_0 0
#define EXTERNAL_INT_1 1
#define EXTERNAL_INT_2 2
#define EXTERNAL_INT_3 3
#define EXTERNAL_INT_4 4
#define EXTERNAL_INT_5 5
#define EXTERNAL_INT_6 6
#define EXTERNAL_INT_7 7
void print(const char *template, ...);
#endif

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/*! \file global.h \brief AVRlib project global include. */
//*****************************************************************************
//
// File Name : 'global.h'
// Title : AVRlib project global include
// Author : Pascal Stang - Copyright (C) 2001-2002
// Created : 7/12/2001
// Revised : 9/30/2002
// Version : 1.1
// Target MCU : Atmel AVR series
// Editor Tabs : 4
//
// Description : This include file is designed to contain items useful to all
// code files and projects.
//
// This code is distributed under the GNU Public License
// which can be found at http://www.gnu.org/licenses/gpl.txt
//
//*****************************************************************************
#ifndef GLOBAL_H
#define GLOBAL_H
// global AVRLIB defines
#include "avrlibdefs.h"
// global AVRLIB types definitions
#include "avrlibtypes.h"
// project/system dependent defines
// CPU clock speed
//#define F_CPU 16000000 // 16MHz processor
//#define F_CPU 14745000 // 14.745MHz processor
//#define F_CPU 8000000 // 8MHz processor
//#define F_CPU 7372800 // 7.37MHz processor
//#define F_CPU 4000000 // 4MHz processor
//#define F_CPU 3686400 // 3.69MHz processor
#define CYCLES_PER_US ((F_CPU+500000)/1000000) // cpu cycles per microsecond
#endif

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/*
pins_arduino.c - pin definitions for the Arduino board
Part of Arduino / Wiring Lite
Copyright (c) 2005 David A. Mellis
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
$Id: pins_arduino.c,v 1.4 2005/05/24 17:47:41 mellis Exp $
*/
#include <avr/io.h>
#include "BConstants.h"
#include "wiring.h"
// On the Arduino board, digital pins are also used
// for the analog output (software PWM). Analog input
// pins are a separate set.
// ATMEL ATMEGA8 / ARDUINO
//
// +-\/-+
// PC6 1| |28 PC5 (AI 0)
// (D 0) PD0 2| |27 PC4 (AI 1)
// (D 1) PD1 3| |26 PC3 (AI 2)
// (D 2) PD2 4| |25 PC2 (AI 3)
// (D 3) PD3 5| |24 PC1 (AI 4)
// (D 4) PD4 6| |23 PC0 (AI 5)
// VCC 7| |22 GND
// GND 8| |21 AREF
// PB6 9| |20 AVCC
// PB7 10| |19 PB5 (D 13)
// (D 5) PD5 11| |18 PB4 (D 12)
// (D 6) PD6 12| |17 PB3 (D 11)
// (D 7) PD7 13| |16 PB2 (D 10)
// (D 8) PB0 14| |15 PB1 (D 9)
// +----+
#define NUM_DIGITAL_PINS 14
#define NUM_ANALOG_OUT_PINS 11
#define NUM_ANALOG_IN_PINS 6
#define NUM_PORTS 4
#define PB 2
#define PC 3
#define PD 4
// these arrays map port names (e.g. port B) to the
// appropriate addresses for various functions (e.g. reading
// and writing)
int port_to_mode[NUM_PORTS + 1] = {
NOT_A_PORT,
NOT_A_PORT,
_SFR_IO_ADDR(DDRB),
_SFR_IO_ADDR(DDRC),
_SFR_IO_ADDR(DDRD),
};
int port_to_output[NUM_PORTS + 1] = {
NOT_A_PORT,
NOT_A_PORT,
_SFR_IO_ADDR(PORTB),
_SFR_IO_ADDR(PORTC),
_SFR_IO_ADDR(PORTD),
};
int port_to_input[NUM_PORTS + 1] = {
NOT_A_PORT,
NOT_A_PORT,
_SFR_IO_ADDR(PINB),
_SFR_IO_ADDR(PINC),
_SFR_IO_ADDR(PIND),
};
// these arrays map the pin numbers on the arduino
// board to the atmega8 port and pin numbers
pin_t digital_pin_to_port_array[NUM_DIGITAL_PINS] = {
{ PD, 0 },
{ PD, 1 },
{ PD, 2 },
{ PD, 3 },
{ PD, 4 },
{ PD, 5 },
{ PD, 6 },
{ PD, 7 },
{ PB, 0 },
{ PB, 1 },
{ PB, 2 },
{ PB, 3 },
{ PB, 4 },
{ PB, 5 },
};
pin_t *digital_pin_to_port = digital_pin_to_port_array;
// Some of the digital pins also support hardware PWM (analog output).
pin_t analog_out_pin_to_port_array[NUM_DIGITAL_PINS] = {
{ NOT_A_PIN, NOT_A_PIN },
{ NOT_A_PIN, NOT_A_PIN },
{ NOT_A_PIN, NOT_A_PIN },
{ NOT_A_PIN, NOT_A_PIN },
{ NOT_A_PIN, NOT_A_PIN },
{ NOT_A_PIN, NOT_A_PIN },
{ NOT_A_PIN, NOT_A_PIN },
{ NOT_A_PIN, NOT_A_PIN },
{ NOT_A_PIN, NOT_A_PIN },
{ PB, 1 },
{ PB, 2 },
{ NOT_A_PIN, NOT_A_PIN },
{ NOT_A_PIN, NOT_A_PIN },
{ NOT_A_PIN, NOT_A_PIN },
};
pin_t *analog_out_pin_to_port = analog_out_pin_to_port_array;
pin_t analog_in_pin_to_port_array[NUM_ANALOG_IN_PINS] = {
{ PC, 5 },
{ PC, 4 },
{ PC, 3 },
{ PC, 2 },
{ PC, 1 },
{ PC, 0 },
};
pin_t *analog_in_pin_to_port = analog_in_pin_to_port_array;

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/*
pin_atmega8.c - pin definitions for the atmega8
Part of Arduino / Wiring Lite
Copyright (c) 2005 David A. Mellis
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
$Id: pins_atmega8.c,v 1.4 2005/05/24 17:47:41 mellis Exp $
*/
#include <avr/io.h>
#include "BConstants.h"
#include "wiring.h"
// We map the pin numbers passed to digitalRead() or
// analogRead() directly to the corresponding pin
// numbers on the Atmega8. No distinction is made
// between analog and digital pins.
// ATMEL ATMEGA8
//
// +-\/-+
// PC6 1| |28 PC5
// PD0 2| |27 PC4
// PD1 3| |26 PC3
// PD2 4| |25 PC2
// PD3 5| |24 PC1
// PD4 6| |23 PC0
// VCC 7| |22 GND
// GND 8| |21 AREF
// PB6 9| |20 AVCC
// PB7 10| |19 PB5
// PD5 11| |18 PB4
// PD6 12| |17 PB3
// PD7 13| |16 PB2
// PB0 14| |15 PB1
// +----+
#define NUM_PINS 28
#define NUM_PORTS 4
#define PB 2
#define PC 3
#define PD 4
int port_to_mode[NUM_PORTS + 1] = {
NOT_A_PORT,
NOT_A_PORT,
_SFR_IO_ADDR(DDRB),
_SFR_IO_ADDR(DDRC),
_SFR_IO_ADDR(DDRD),
};
int port_to_output[NUM_PORTS + 1] = {
NOT_A_PORT,
NOT_A_PORT,
_SFR_IO_ADDR(PORTB),
_SFR_IO_ADDR(PORTC),
_SFR_IO_ADDR(PORTD),
};
int port_to_input[NUM_PORTS + 1] = {
NOT_A_PORT,
NOT_A_PORT,
_SFR_IO_ADDR(PINB),
_SFR_IO_ADDR(PINC),
_SFR_IO_ADDR(PIND),
};
pin_t digital_pin_to_port_array[] = {
{ NOT_A_PIN, NOT_A_PIN },
{ PC, 6 },
{ PD, 0 },
{ PD, 1 },
{ PD, 2 },
{ PD, 3 },
{ PD, 4 },
{ NOT_A_PIN, NOT_A_PIN },
{ NOT_A_PIN, NOT_A_PIN },
{ PB, 6 },
{ PB, 7 },
{ PD, 5 },
{ PD, 6 },
{ PD, 7 },
{ PB, 0 },
{ PB, 1 },
{ PB, 2 },
{ PB, 3 },
{ PB, 4 },
{ PB, 5 },
{ NOT_A_PIN, NOT_A_PIN },
{ NOT_A_PIN, NOT_A_PIN },
{ NOT_A_PIN, NOT_A_PIN },
{ PC, 0 },
{ PC, 1 },
{ PC, 2 },
{ PC, 3 },
{ PC, 4 },
{ PC, 5 },
};
pin_t *digital_pin_to_port = digital_pin_to_port_array;
pin_t *analog_in_pin_to_port = digital_pin_to_port_array;
pin_t *analog_out_pin_to_port = digital_pin_to_port_array;

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/*
wiring.c - Wiring API Partial Implementation
Part of Arduino / Wiring Lite
Copyright (c) 2005 David A. Mellis
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
$Id: wiring.c,v 1.7 2005/05/28 21:04:15 mellis Exp $
*/
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/signal.h>
#include <avr/delay.h>
#include <stdio.h>
#include <stdarg.h>
#ifndef cbi
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
#endif
#ifndef sbi
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
#endif
// from Pascal's avrlib
#include "global.h"
//#include "a2d.h"
#include "timer.h"
#include "uart.h"
// timer.h #defines delay to be delay_us, we need to undefine
// it so our delay can be in milliseconds.
#undef delay
#include "BConstants.h"
#include "wiring.h"
// Get the hardware port of the given virtual pin number. This comes from
// the pins_*.c file for the active board configuration.
int digitalPinToPort(int pin)
{
return digital_pin_to_port[pin].port;
}
// Get the bit location within the hardware port of the given virtual pin.
// This comes from the pins_*.c file for the active board configuration.
int digitalPinToBit(int pin)
{
return digital_pin_to_port[pin].bit;
}
int analogOutPinToPort(int pin)
{
return analog_out_pin_to_port[pin].port;
}
int analogOutPinToBit(int pin)
{
return analog_out_pin_to_port[pin].bit;
}
int analogInPinToBit(int pin)
{
return analog_in_pin_to_port[pin].bit;
}
void pinMode(int pin, int mode)
{
if (digitalPinToPort(pin) != NOT_A_PIN) {
if (mode == INPUT)
cbi(_SFR_IO8(port_to_mode[digitalPinToPort(pin)]), digitalPinToBit(pin));
else
sbi(_SFR_IO8(port_to_mode[digitalPinToPort(pin)]), digitalPinToBit(pin));
}
}
void digitalWrite(int pin, int val)
{
if (digitalPinToPort(pin) != NOT_A_PIN) {
// If the pin that support PWM output, we need to turn it off
// before doing a digital write.
if (analogOutPinToBit(pin) == 1)
timer1PWMAOff();
if (analogOutPinToBit(pin) == 2)
timer1PWMBOff();
if (val == LOW)
cbi(_SFR_IO8(port_to_output[digitalPinToPort(pin)]), digitalPinToBit(pin));
else
sbi(_SFR_IO8(port_to_output[digitalPinToPort(pin)]), digitalPinToBit(pin));
}
}
int digitalRead(int pin)
{
if (digitalPinToPort(pin) != NOT_A_PIN) {
// If the pin that support PWM output, we need to turn it off
// before getting a digital reading.
if (analogOutPinToBit(pin) == 1)
timer1PWMAOff();
if (analogOutPinToBit(pin) == 2)
timer1PWMBOff();
return (_SFR_IO8(port_to_input[digitalPinToPort(pin)]) >> digitalPinToBit(pin)) & 0x01;
}
return LOW;
}
/*
int analogRead(int pin)
{
unsigned long start_time = millis();
int ch = analogInPinToBit(pin);
volatile unsigned int low, high;
//return a2dConvert10bit(ch);
a2dSetChannel(ch);
a2dStartConvert();
// wait until the conversion is complete or we
// time out. without the timeout, this sometimes
// becomes an infinite loop. page 245 of the atmega8
// datasheet says the conversion should take at most
// 260 microseconds, so if two milliseconds have ticked
// by, something's wrong.
//while (!a2dIsComplete() && millis() - start_time < 50);
while (!a2dIsComplete());
// a2Convert10bit sometimes read ADCL and ADCH in the
// wrong order (?) causing it to sometimes miss reading,
// especially if called multiple times in rapid succession.
//return a2dConvert10bit(ch);
//return ADCW;
low = ADCL;
high = ADCH;
return (high << 8) | low;
}
*/
int analogRead(int pin)
{
unsigned int low, high, ch = analogInPinToBit(pin);
// the low 4 bits of ADMUX select the ADC channel
ADMUX = (ADMUX & (unsigned int) 0xf0) | (ch & (unsigned int) 0x0f);
// without a delay, we seem to read from the wrong channel
delay(1);
// start the conversion
sbi(ADCSRA, ADSC);
// ADSC is cleared when the conversion finishes
while (bit_is_set(ADCSRA, ADSC));
// we have to read ADCL first; doing so locks both ADCL
// and ADCH until ADCH is read. reading ADCL second would
// cause the results of each conversion to be discarded,
// as ADCL and ADCH would be locked when it completed.
low = ADCL;
high = ADCH;
// combine the two bytes
return (high << 8) | low;
}
// Right now, PWM output only works on the pins with
// hardware support. These are defined in the appropriate
// pins_*.c file. For the rest of the pins, we default
// to digital output.
void analogWrite(int pin, int val)
{
// We need to make sure the PWM output is enabled for those pins
// that support it, as we turn it off when digitally reading or
// writing with them. Also, make sure the pin is in output mode
// for consistenty with Wiring, which doesn't require a pinMode
// call for the analog output pins.
if (analogOutPinToBit(pin) == 1) {
pinMode(pin, OUTPUT);
timer1PWMAOn();
timer1PWMASet(val);
} else if (analogOutPinToBit(pin) == 2) {
pinMode(pin, OUTPUT);
timer1PWMBOn();
timer1PWMBSet(val);
} else if (val < 128)
digitalWrite(pin, LOW);
else
digitalWrite(pin, HIGH);
}
void beginSerial(int baud)
{
uartInit();
uartSetBaudRate(baud);
}
void serialWrite(unsigned char c)
{
uartSendByte(c);
}
void printMode(int mode)
{
// do nothing, we only support serial printing, not lcd.
}
void uartSendString(unsigned char *str)
{
while (*str)
uartSendByte(*str++);
}
void print(const char *format, ...)
{
char buf[256];
va_list ap;
va_start(ap, format);
vsnprintf(buf, 256, format, ap);
va_end(ap);
uartSendString(buf);
}
unsigned long millis()
{
// timer 0 increments every timer0GetPrescaler() cycles, and
// overflows when it reaches 256. we calculate the total
// number of clock cycles, then divide by the number of clock
// cycles per millisecond.
return timer0GetOverflowCount() * timer0GetPrescaler() * 256L / F_CPU * 1000L;
}
void delay(unsigned long ms)
{
timerPause(ms);
}
int main(void)
{
sei();
// timer 0 is used for millis() and delay()
timer0Init();
// timer 1 is used for the hardware pwm
timer1Init();
timer1SetPrescaler(TIMER_CLK_DIV1);
timer1PWMInit(8);
//a2dInit();
//a2dSetPrescaler(ADC_PRESCALE_DIV128);
// set a2d reference to AVCC (5 volts)
cbi(ADMUX, REFS1);
sbi(ADMUX, REFS0);
// set a2d prescale factor to 128
// 16 MHz / 128 = 125 KHz, inside the desired 50-200 KHz range.
// XXX: this will not work properly for other clock speeds, and
// this code should use F_CPU to determine the prescale factor.
sbi(ADCSRA, ADPS2);
sbi(ADCSRA, ADPS1);
sbi(ADCSRA, ADPS0);
// enable a2d conversions
sbi(ADCSRA, ADEN);
setup();
for (;;)
loop();
return 0;
}

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/*
wiring.h - Wiring API Partial Implementation
Part of Arduino / Wiring Lite
Copyright (c) 2005 David A. Mellis
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
$Id: wiring.h,v 1.4 2005/05/24 17:47:41 mellis Exp $
*/
#ifndef Wiring_h
#define Wiring_h
#define HIGH 0x1
#define LOW 0x0
#define INPUT 0x0
#define OUTPUT 0x1
#define true 0x1
#define false 0x0
#define NOT_A_PIN 0
#define NOT_A_PORT -1
void delay(unsigned long);
void delay_ms(unsigned short ms);
void pinMode(int, int);
void digitalWrite(int, int);
int digitalRead(int);
void analogWrite(int, int);
int analogRead(int);
unsigned long millis(void);
void setup(void);
void loop(void);
void beginSerial(int);
void serialWrite(unsigned char);
typedef struct {
int port;
int bit;
} pin_t;
extern int port_to_mode[];
extern int port_to_input[];
extern int port_to_output[];
extern pin_t *digital_pin_to_port;
extern pin_t *analog_in_pin_to_port;
extern pin_t *analog_out_pin_to_port;
#endif

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core/wiringlite.inc Executable file
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#define F_CPU 16000000UL
#define CPU_FREQ 16000000L
#define XTAL_CPU 16000000L
#define UART_BAUD_RATE 9600
#ifndef __AVR_ATmega8__
#define __AVR_ATmega8__
#endif
#define __MCU_CLOCK_FREQUENCY__ _16.0000_MHz
//#include "BConstants.h"
#include "wiring.h"
#include <avr/interrupt.h>
#include <avr/signal.h>