Neues Rescue-Programm angefangen

This commit is contained in:
neoraider 2007-04-03 12:47:03 +00:00
commit 98c623dc89
10 changed files with 937 additions and 0 deletions

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#include "Global.h"
void *operator new(size_t sz) {
return malloc(sz);
}
void operator delete(void *p) {
free(p);
}

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#ifndef _ROBOCUP_GLOBAL_H_
#define _ROBOCUP_GLOBAL_H_
#include <stdlib.h>
// Geschwindigkeiten
#define DEFAULT_SPEED 255
#define SPEED_RUECK 50
// Status
#define STATUS_OK 0
#define STATUS_WEISS 1
#define STATUS_HINDERNIS_L 2 // Hindernis vorne links
#define STATUS_HINDERNIS_R 3 // Hindernis vorne rechts
#define STATUS_HINDERNIS_WAR_L 4 // Hindernis war vorne links
#define STATUS_HINDERNIS_WAR_R 5 // Hindernis war vorne rechts
#define STATUS_HINDERNIS_VOR_L 6 // Hindernis ist gleich vorne links
#define STATUS_HINDERNIS_VOR_R 7 // Hindernis ist gleich vorne rechts
// Sensoren
#define KALI_MINDIFF 80 // minimale Abweichung s/w
#define KALI_WEISSMAXDIFF 5 // maximale Abweichung weiss1/weiss2
#define HINDERNIS_ERKENNUNGSWERT 155 // 100
#define HINDERNIS_ERKENNUNGSWERT_SEITL 80
#define HINDERNIS_SOLLWERT 90
#define HINDERNIS_ABW 5 // 10
#define HINDERNIS_SLEEP 100
// Opfer
#define OPFER_TIMEOUT 500
#define OPFER_WAIT 2000
#define OPFER_TIMER 1000
#define OPFER_BEEP 440
void *operator new(size_t sz);
void operator delete(void *p);
#endif

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#include "Navigation.h"
void Navigation::start() {
int r = m_speed, l = m_speed;
switch(m_richtung)
{
case -2:
l = 0;
break;
case -1:
l /= 4;
break;
case 1:
r /= 4;
break;
case 2:
r = 0;
}
m_board->motor(MOTOR_PORT_LINKS, l);
m_board->motor(MOTOR_PORT_RECHTS, r);
m_gestartet = true;
}
void Navigation::stop() {
m_board->motor(MOTOR_PORT_LINKS, 0);
m_board->motor(MOTOR_PORT_RECHTS, 0);
m_gestartet = false;
}
void Navigation::setSpeed(int speed) {
m_speed = (speed > 255) ? 255 : (speed < -255) ? -255 : speed;
if(m_gestartet) start();
}
void Navigation::setRichtung(int richtung) {
m_richtung = richtung;
if(m_gestartet) start();
}

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#include "qfixSoccerBoard.h"
#include "Global.h"
// Physikalische Motorausgänge
#define MOTOR_PORT_LINKS 0
#define MOTOR_PORT_RECHTS 1
class Navigation {
private:
SoccerBoard *m_board;
bool m_gestartet;
int m_speed;
int m_richtung;
public:
Navigation(SoccerBoard *board) {
m_gestartet = false;
m_speed = DEFAULT_SPEED;
m_richtung = 0;
m_board = board;
}
int getRichtung() {return m_richtung;}
void start();
void stop();
void setSpeed(int speed);
void setRichtung(int richtung);
};

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#include "Global.h"
#include "Navigation.h"
#include "Sensors.h"
#include "qfixSoccerBoard.h"
void OpferSignal(SoccerBoard *board) {
board->ledOn(0);
board->beep(OPFER_BEEP);
board->sleep(OPFER_WAIT);
board->ledOff(0);
board->beepOff();
}
int main() {
int status = STATUS_OK;
int linie = 0, last_linie = 0;
SoccerBoard board;
Sensors sensors(&board);
Navigation nav(&board);
do {
sensors.update();
} while(!sensors.kalibrieren());
board.ledOn(0);
board.waitForButton(0);
board.ledOff(0);
board.sleep(4000);
nav.start();
while(true) {
sensors.update();
sensors.auswerten();
last_linie = linie;
linie = sensors.getLinie();
switch(status) {
case STATUS_OK:
if(linie == 0) sensors.kalibrieren();
if(sensors.getOpfer() && board.timer()) {
nav.stop();
OpferSignal(&board);
nav.start();
board.setTimer(OPFER_TIMER);
break;
}
if(sensors.hindernisV()) {
nav.setSpeed(SPEED_RUECK);
nav.setRichtung(0);
board.sleep(HINDERNIS_SLEEP);
nav.setSpeed(DEFAULT_SPEED);
if(sensors.getDsVL() > sensors.getDsVR()) {
// Hindernis eher links -> wir fahren rechts rum
nav.setRichtung(2);
status = STATUS_HINDERNIS_VOR_L; // status variable setzen
}
else {
// Hindernis eher rechts -> wir fahren links rum
nav.setRichtung(-2);
status = STATUS_HINDERNIS_VOR_R; // status variable setzen
}
break;
}
switch(linie) {
case LINIE_FEHLER:
break;
case LINIE_WEISS:
/*if(abs(last_linie) == 2) break;
nav.setRichtung(0);
status = STATUS_WEISS;*/
break;
default:
nav.setRichtung(linie);
}
break;
case STATUS_WEISS:
if(sensors.getOpfer() && board.timer()) {
nav.stop();
OpferSignal(&board);
nav.start();
board.setTimer(OPFER_TIMER);
continue;
}
if(linie != LINIE_WEISS) status = STATUS_OK;
break;
case STATUS_HINDERNIS_VOR_L:
if(sensors.hindernisL() && linie == LINIE_WEISS) status = STATUS_HINDERNIS_L;
break;
case STATUS_HINDERNIS_VOR_R:
if(sensors.hindernisR() && linie == LINIE_WEISS) status = STATUS_HINDERNIS_R;
break;
case STATUS_HINDERNIS_L:
if(sensors.hindernisVL()) {
nav.setSpeed(SPEED_RUECK);
nav.setRichtung(0);
board.sleep(HINDERNIS_SLEEP);
nav.setSpeed(DEFAULT_SPEED);
nav.setRichtung(2);
status = STATUS_HINDERNIS_VOR_L;
}
else if(linie == LINIE_WEISS) {
if(sensors.getDsL() > HINDERNIS_SOLLWERT + HINDERNIS_ABW)
nav.setRichtung(2);
else if(sensors.getDsL() < HINDERNIS_SOLLWERT - HINDERNIS_ABW)
nav.setRichtung(-2);
else
nav.setRichtung(0);
}
else {
status = STATUS_HINDERNIS_WAR_L;
nav.setRichtung(0);
}
break;
case STATUS_HINDERNIS_R:
if(sensors.hindernisVR()) {
nav.setSpeed(SPEED_RUECK);
nav.setRichtung(0);
board.sleep(HINDERNIS_SLEEP);
nav.setSpeed(DEFAULT_SPEED);
nav.setRichtung(-2);
status = STATUS_HINDERNIS_VOR_R;
}
else if(linie == LINIE_WEISS) {
if(sensors.getDsR() > HINDERNIS_SOLLWERT + HINDERNIS_ABW)
nav.setRichtung(-2);
else if(sensors.getDsR() < HINDERNIS_SOLLWERT - HINDERNIS_ABW)
nav.setRichtung(2);
else
nav.setRichtung(0);
}
else {
status = STATUS_HINDERNIS_WAR_R;
nav.setRichtung(0);
}
break;
case STATUS_HINDERNIS_WAR_L:
if(linie != LINIE_WEISS) break;
board.sleep(40);
status = STATUS_OK;
nav.setRichtung(2);
break;
case STATUS_HINDERNIS_WAR_R:
if(linie != LINIE_WEISS) break;
board.sleep(40);
status = STATUS_OK;
nav.setRichtung(-2);
}
}
return 0;
}

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#include "qfixSoccerBoard.h"
#include "Global.h"
#include "Sensors.h"
void Sensor::update() {
m_board->analog(m_port);
m_board->analog(m_port);
m_wert = m_board->analog(m_port);
}
void Sensors::update() {
m_lsLinks->update();
m_lsMitte->update();
m_lsRechts->update();
m_dsL->update();
m_dsVL->update();
m_dsV->update();
m_dsVR->update();
m_dsR->update();
}
bool Sensors::kalibrieren() {
int links = m_lsLinks->getWert();
int mitte = m_lsMitte->getWert();
int rechts = m_lsRechts->getWert();
int weiss = (rechts + links) / 2;
int diff = mitte - weiss;
if(links > mitte || rechts > mitte) return false;
if(diff < KALI_MINDIFF) return false;
if(abs(rechts - links) > KALI_WEISSMAXDIFF) return false;
if(!m_kalibriert) {
m_gw_sg = mitte - diff/8;
m_gw_gw = weiss + diff/8;
m_gw_ws = weiss - diff/8;
m_gw_sw = weiss + diff/2;
m_kalibriert = true;
}
else {
m_gw_sg = m_gw_sg/2 + mitte/2 - diff/16;
m_gw_gw = m_gw_gw/2 + weiss/2 + diff/16;
m_gw_ws = m_gw_ws/2 + weiss/2 - diff/16;
m_gw_sw = m_gw_sw/2 + weiss/2 + diff/4;
}
return true;
}
void Sensors::auswerten() {
// Linie
m_liniePos = int(SW_SCHWARZ(m_lsRechts)) - int(SW_SCHWARZ(m_lsLinks)); //Linie links oder rechts -> -1 oder 1, beides oder keines -> 0
m_liniePos *= (1+int(SW_WEISS(m_lsMitte))); //Kurvenstärke bestimmen
if((!m_liniePos) && SW_WEISS(m_lsMitte)) //alles weiß?
m_liniePos = LINIE_WEISS;
if(SW_SCHWARZ(m_lsLinks) && SW_SCHWARZ(m_lsRechts)) // beide äußeren schwarz? -> fehler
m_liniePos = LINIE_FEHLER;
// Opfer
if(m_sLinks) m_sLinks--;
if(m_sMitte) m_sMitte--;
if(m_sRechts) m_sRechts--;
if(m_gLinks) m_gLinks--;
if(m_gMitte) m_gMitte--;
if(m_gRechts) m_gRechts--;
if(C_SILBER(m_lsLinks)) m_sLinks = OPFER_TIMEOUT;
if(C_SILBER(m_lsMitte)) m_sMitte = OPFER_TIMEOUT;
if(C_SILBER(m_lsRechts)) m_sRechts = OPFER_TIMEOUT;
if(C_GRUEN(m_lsLinks)) m_gLinks = OPFER_TIMEOUT;
if(C_GRUEN(m_lsMitte)) m_gMitte = OPFER_TIMEOUT;
if(C_GRUEN(m_lsRechts)) m_gRechts = OPFER_TIMEOUT;
}

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#ifndef _ROBOCUP_SENSORS_H_
#define _ROBOCUP_SENSORS_H_
#include "qfixSoccerBoard.h"
#define SENSOR_PORT_LINIE_LINKS 0
#define SENSOR_PORT_LINIE_MITTE 1
#define SENSOR_PORT_LINIE_RECHTS 2
#define SENSOR_PORT_D_L 3
#define SENSOR_PORT_D_VL 4
#define SENSOR_PORT_D_V 5
#define SENSOR_PORT_D_VR 6
#define SENSOR_PORT_D_R 7
#define LINIE_WEISS 70
#define LINIE_FEHLER 71
#define SW_SCHWARZ(sensor) (sensor->getWert() > m_gw_sw)
#define SW_WEISS(sensor) (sensor->getWert() <= m_gw_sw)
#define C_SCHWARZ(sensor) (sensor->getWert() > m_gw_sg)
#define C_GRUEN(sensor) (sensor->getWert() > m_gw_gw && sensor->getWert() <= m_gw_sg)
#define C_WEISS(sensor) (sensor->getWert() > m_gw_ws && sensor->getWert() <= m_gw_gw)
#define C_SILBER(sensor) (sensor->getWert() <= m_gw_ws)
class Sensor {
private:
SoccerBoard *m_board;
int m_port;
int m_wert;
public:
Sensor(SoccerBoard *board, int port) {
m_board = board;
m_port = port;
}
void update();
int getWert() {
return m_wert;
}
};
class Sensors {
private:
SoccerBoard *m_board;
bool m_kalibriert;
Sensor *m_lsLinks, *m_lsMitte, *m_lsRechts;
int m_sLinks, m_sMitte, m_sRechts;
int m_gLinks, m_gMitte, m_gRechts;
int m_liniePos;
int m_gw_sg; // Grenzwert schwarz/grün
int m_gw_gw; // Grenzwert grün/weiß
int m_gw_ws; // Grenzwert weiß/silber
int m_gw_sw; // Grenzwert schwarz/weiß
Sensor *m_dsL, *m_dsVL, *m_dsV, *m_dsVR, *m_dsR;
public:
Sensors(SoccerBoard *board) {
m_board = board;
m_kalibriert = false;
m_lsLinks = new Sensor(board, SENSOR_PORT_LINIE_LINKS);
m_lsMitte = new Sensor(board, SENSOR_PORT_LINIE_MITTE);
m_lsRechts = new Sensor(board, SENSOR_PORT_LINIE_RECHTS);
m_dsL = new Sensor(board, SENSOR_PORT_D_L);
m_dsVL = new Sensor(board, SENSOR_PORT_D_VL);
m_dsV = new Sensor(board, SENSOR_PORT_D_V);
m_dsVR = new Sensor(board, SENSOR_PORT_D_VR);
m_dsR = new Sensor(board, SENSOR_PORT_D_R);
m_sLinks = m_sMitte = m_sRechts = 0;
m_gLinks = m_gMitte = m_gRechts = 0;
m_liniePos = 0;
}
~Sensors() {
delete m_lsLinks;
delete m_lsMitte;
delete m_lsRechts;
delete m_dsL;
delete m_dsVL;
delete m_dsV;
delete m_dsVR;
delete m_dsR;
}
int getLinie() {return m_liniePos;}
bool getOpfer() {
return /*(m_sLinks && m_sMitte && m_sRechts) || */(m_gLinks && m_gMitte && m_gRechts);
}
bool hindernisL() {
return (m_dsL->getWert() > HINDERNIS_ERKENNUNGSWERT_SEITL);
}
bool hindernisVL() {
return (m_dsVL->getWert() > HINDERNIS_ERKENNUNGSWERT);
}
bool hindernisV() {
return (m_dsV->getWert() > HINDERNIS_ERKENNUNGSWERT);
}
bool hindernisVR() {
return (m_dsVR->getWert() > HINDERNIS_ERKENNUNGSWERT);
}
bool hindernisR() {
return m_dsR->getWert();
}
int getDsL() {
return m_dsL->getWert();
}
int getDsVL() {
return m_dsVL->getWert();
}
int getDsV() {
return m_dsV->getWert();
}
int getDsVR() {
return m_dsVR->getWert();
}
int getDsR() {
return m_dsR->getWert();
}
void update();
void auswerten();
bool kalibrieren();
};
#endif

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#include "qfixSoccerBoard.h"
static int speedMotor0 = 0;
static int speedMotor1 = 0;
//static int speedMotor2 = 0;
//static int speedMotor3 = 0;
//static int speedMotor4 = 0;
//static int speedMotor5 = 0;
static unsigned long timerVal = 0;
static unsigned long sleepVal = 0;
static int beepFreq = 0;
static int beepFreqTimer = 0;
static long beepTimer = 0;
// PWM routine //
SIGNAL (SIG_OVERFLOW0)
{
const int OFFSET=50; // motor does not work with very low ratio
static int counter=255+OFFSET;
if (speedMotor0==0) cbi(PORTB, 3); // enable1 = 0
else if (abs(speedMotor0)+OFFSET >= counter) sbi(PORTB, 3); // enable1 = 1
else cbi(PORTB, 3); // enable1 = 0
if (speedMotor1==0) cbi(PORTG, 2); // enable2 = 0
else if (abs(speedMotor1)+OFFSET >= counter) sbi(PORTG, 2); // enable2 = 1
else cbi(PORTG, 2); // enable2 = 0
/*if (speedMotor2==0) cbi(PORTB, 4); // enable3 = 0
else if (abs(speedMotor2)+OFFSET >= counter) sbi(PORTB, 4); // enable3 = 1
else cbi(PORTB, 4); // enable3 = 0
if (speedMotor3==0) cbi(PORTB, 6); // enable4 = 0
else if (abs(speedMotor3)+OFFSET >= counter) sbi(PORTB, 6); // enable4 = 1
else cbi(PORTB, 6); // enable4 = 0
if (speedMotor4==0) cbi(PORTB, 5); // enable5 = 0
else if (abs(speedMotor4)+OFFSET >= counter) sbi(PORTB, 5); // enable5 = 1
else cbi(PORTB, 5); // enable5 = 0
if (speedMotor5==0) cbi(PORTB, 7); // enable6 = 0
else if (abs(speedMotor5)+OFFSET >= counter) sbi(PORTB, 7); // enable6 = 1
else cbi(PORTB, 7); // enable6 = 0*/
if (counter==0) counter=255+OFFSET;
else counter--;
if(timerVal > 0) timerVal--;
if(sleepVal > 0) sleepVal--;
if(beepTimer > 0) beepTimer--;
if(beepTimer == 0) cbi(PORTB, 4);
else {
if(beepFreqTimer) beepFreqTimer--;
else beepFreqTimer = beepFreq;
if(beepFreqTimer > beepFreq/2) sbi(PORTB, 4);
else cbi(PORTB, 4);
}
}
void initTimer()
{
TIMSK0=1; // timer 0 overflow for interrupt (8 bit timer)
TCCR0A=2; // prescaler 8 => 0.5us
TCNT0=56;
sei(); // enable interrupts
}
SoccerBoard::SoccerBoard()
{
// PORT A: Digital In (PA0, PA1) //
DDRA= 255 - (1+2); // all bits output (motor direction) except PA0,PA1 (digital in)
PORTA=1+2; // set pullups for digital in
// PORT B: LEDs (PB0, PB2), Motor enable (PB3-PB7) //
DDRB = 1+4; // PB0 + PB4 = LEDs -> output
DDRB |= 8+16+32+64+128; // PB3 - PB7 = Motor enable -> output
PORTB |= 1+4; // set bits 0 and 2 -> LEDs off
PORTB &= 255-(8+16+32+64+128); // clear bits 3-7 -> motor disable
// PORT C: Power Output //
DDRC = 255; // direction port D, all bits output
PORTC = 0; // clear all bits -> power on
// PORT D: I2C, USB, CAN //
DDRD = 0; // all bits input
PORTD = 1+2; // set bits 0,1 -> I2C pullUps
// PORT E: Digital In (PE2 - PE7) //
DDRE=0; // all bits input
PORTE=4+8+16+32+64+128; // set pullups for digital in
// PORT F: Analog In //
DDRF=0; // all bits input
ADCSRA=128; // set A/D enable bit (ADEN)
// PORT G: Buttons (PG3, PG4), motor enable (PG2)
DDRG = BV(PG2); // PG2 output
PORTG= BV(PG3)+BV(PG4); // set pullups for buttons
cbi(PORTG,PG2); // clear PG2 -> motor disable
initTimer();
}
void SoccerBoard::ledOn(int i)
{
if (i==0) cbi(PORTB, PB0); // clear bit -> LED on
else if (i==1) cbi(PORTB, PB2); // clear bit -> LED on
}
void SoccerBoard::ledOff(int i)
{
if (i==0) sbi(PORTB, PB0); // set bit -> LED off
else if (i==1) sbi(PORTB, PB2); // set bit -> LED off
}
void SoccerBoard::ledsOff()
{
PORTB|=BV(PB0)+BV(PB2); // set bits -> LEDs off
}
void SoccerBoard::led(int i, bool state)
{
if (state) ledOn(i); else ledOff(i);
}
void SoccerBoard::powerOn(int i)
{
if ((i<0) || (i>7)) return;
cbi(PORTC, i);
}
void SoccerBoard::powerOff(int i)
{
if ((i<0) || (i>7)) return;
sbi(PORTC, i);
}
void SoccerBoard::power(int i, bool state)
{
if (state) powerOn(i); else powerOff(i);
}
bool SoccerBoard::button(int i)
{
if (i==0) return ( (PING & BV(PG4)) == 0);
else if (i==1) return ( (PING & BV(PG3)) == 0);
else return false; // bad approach...
}
void SoccerBoard::ledMeter(int i,int maxvalue = 256)
{
//led(0, (i>100)); //modified by meyma
//led(1, (i>200));
if(i < (maxvalue / 4))
{
ledOff(0);
ledOff(1);
}
else if(i < (maxvalue / 2))
{
ledOn(0);
ledOff(1);
}
else if(i < ((maxvalue /4) * 3))
{
ledOff(0);
ledOn(1);
}
else {
ledOn(0);
ledOn(1);
}
}
void SoccerBoard::motor(int i, int speed)
{
if ((i<0) || (i>1)) return;
if (i==0) {
speedMotor0 = speed;
if (speed>0) sbi(PORTA, 3); // input1 = 1
else cbi(PORTA, 3); // input1 = 0
}
else if (i==1) {
speedMotor1 = speed;
if (speed>0) sbi(PORTA, 2); // input2 = 1
else cbi(PORTA, 2); // input2 = 0
}
/*else if (i==2) {
speedMotor2 = speed;
if (speed>0) sbi(PORTA, 5); // input3 = 1
else cbi(PORTA, 5); // input3 = 0
}
else if (i==3) {
speedMotor3 = speed;
if (speed>0) sbi(PORTA, 4); // input4 = 1
else cbi(PORTA, 4); // input4 = 0
}
else if (i==4) {
speedMotor4 = speed;
if (speed>0) sbi(PORTA, 7); // input5 = 1
else cbi(PORTA, 7); // input5 = 0
}
else if (i==5) {
speedMotor5 = speed;
if (speed>0) sbi(PORTA, 6); // input6 = 1
else cbi(PORTA, 6); // input6 = 0
}*/
}
void SoccerBoard::motorsOff()
{
motor(0,0);
motor(1,0);
motor(2,0);
motor(3,0);
motor(4,0);
motor(5,0);
}
// return 0-255 //
int SoccerBoard::analog(int i)
{
if ((i<0) || (i>7)) return -1;
ADMUX=i; // select analog input and start A/D
sbi(ADMUX, ADLAR); // left adjust -> we use only ADCH
sbi(ADCSRA, ADSC); // start conversion
while (ADCSRA & 64); // wait until ADSC is low again
int value = ADCH; // read 8 bit value fom ADCH
return value;
}
bool SoccerBoard::digital(int i)
{
if ((i<0) || (i>7)) return false; // bad solution...
if (i==0) return (PINA & 1);
else if (i==1) return (PINA & 2);
else return (PINE & (1<<i)) ;
}
void SoccerBoard::waitForButton(int i)
{
if ((i<0) || (i>3)) return; // bad solution...
while (!button(i)) { /* do nothing */ }
while (button(i)) { /* do nothing */ }
}
void SoccerBoard::beep(int freq) {
beep(freq, -1);
}
void SoccerBoard::beep(int freq, long msecs) {
beepTimer = 7*msecs;
beepFreq = 7000 / freq;
}
void SoccerBoard::beepOff() {
beepTimer = 0;
}
void SoccerBoard::setTimer(unsigned long msecs) {
timerVal = 7*msecs;
}
bool SoccerBoard::timer() {
return (timerVal <= 0);
}
void SoccerBoard::sleep(unsigned long msecs) {
sleepVal = 7*msecs;
while(sleepVal > 0);
}

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#include <qfix/qfix.h>
#ifndef qfixSoccerBoard_h
#define qfixSoccerBoard_h
/**
* \class SoccerBoard
* \brief Represents the controller board "SoccerBoard".
* \author Stefan Enderle
*
* The class SoccerBoard represents the
* physical SoccerBoard with all its inputs and outputs.
* With this class it is possible to drive the motors,
* put on LEDs, check the buttons and get data from the
* analog and digital inputs.
*/
class SoccerBoard
{
public:
/** Constructor for the SoccerBoard class.
*/
SoccerBoard();
/** Puts on LED i. i must be 0 or 1.
*/
void ledOn(int i);
/** Puts off LED i. i must be 0 or 1.
*/
void ledOff(int i);
/** Puts off all LEDs.
*/
void ledsOff();
/** Puts LED i on if state is true, else off. i must be 0 or 1.
*/
void led(int i, bool state);
/** Puts the power output i on
*/
void powerOn(int i);
/** Puts the power output i off
*/
void powerOff(int i);
/** Puts the power output i on if state is true, else off.
*/
void power(int i, bool state);
/** Checks the state of button i. If it is pressed, true is returned,
* else false.
*/
bool button(int i);
/** Uses the four LEDs on the board to display the value i
* with 0 <= i <= 255
*/
void ledMeter(int i,int maxvalue);
/** Sets motor i to the given speed. -255 <= speed <= 255.
*/
void motor(int i, int speed);
void stop(int i);
/** Puts off all motors.
*/
void motorsOff();
/** returns the value of the analog port i. 0 <= value <= 255.
*/
int analog(int i);
/** returns true if the digital port is logical high, else false.
*/
bool digital(int i);
/** Waits until button i is pressed and released again.
*/
void waitForButton(int i);
void beep(int freq);
void beep(int freq, long msecs);
void beepOff();
void setTimer(unsigned long msecs);
bool timer();
void sleep(unsigned long msecs);
};
void initTimer();
#endif