WebSVN - Projects - Rev 54 - /IR-TX-BL/branches/LED-CTRL

//############################################################################
// - PWM CTRL
// - Main
// - ATMEGA8 mit 8MHz
// - Nur für den privaten Gebrauch
// - Keine Garantie auf Fehlerfreiheit
// - Kommerzielle Nutzung nur mit meiner Zustimmung
// - walter Meyer @ www.freakware.de
// - 11.12.2007
// - Make sure Fuses are programmed for internal 8 MHz RC Oscilator
//############################################################################*/

#include "main.h"
#include "uart.h"
#include "twislave.h"

volatile unsigned int ppm_signal = 1500;
volatile unsigned char ppm_new = 0;
volatile unsigned char TMR1OvF = 0;
volatile unsigned int TMR1MS;
volatile unsigned char ch0;
volatile unsigned char ch1;
volatile unsigned char ch2;
volatile unsigned char ch3;
volatile unsigned char ch4;
volatile unsigned char ch5;
volatile unsigned char ch0_tmp;
volatile unsigned char ch1_tmp;
volatile unsigned char ch2_tmp;
volatile unsigned char ch3_tmp;
volatile unsigned char ch4_tmp;
volatile unsigned char ch5_tmp;

unsigned int timer;

SIGNAL(SIG_OVERFLOW1)
{
TMR1OvF++;
}

SIGNAL(SIG_INPUT_CAPTURE1)
{
static unsigned int pos_ICR;
static unsigned int ppm;

if ((TCCR1B & (1<<ICES1)) != 0) //rising edge
{
TCCR1B &= ~(1<<ICES1); //set falling egde
TMR1OvF = 0;
pos_ICR = ICR1;
}
else //falling edge
{
TCCR1B |= (1<<ICES1); //set rising egde
ppm = (ICR1 - pos_ICR + (int) TMR1OvF * 65536);
if ((ppm > 600) && (ppm < 2400))
{
if (ppm > 2100) ppm = 2100;
if (ppm < 900) ppm = 900;
ppm = (ppm_signal * 3 + ppm) / 4;
ppm_signal = ppm;
if (ppm_new < 50) ppm_new++;
}

}

}

SIGNAL(SIG_OVERFLOW0)
{
// this function is called every 32us,
// it is very important that it's execution time is as short as possible
// currently it's about 20us

static unsigned char counter = 254;
static unsigned char ms1 = 0;
unsigned char PORTB_BAK;
unsigned char PORTD_BAK;

PORTB_BAK = PORTB;
PORTD_BAK = PORTD;

if (counter++ == 254)
{
PORTB_BAK LEDON (CH0_B | CH1_B | CH2_B);
PORTD_BAK LEDON (CH3_D | CH4_D | CH5_D);
ch0_tmp = ch0;
ch1_tmp = ch1;
ch2_tmp = ch2;
ch3_tmp = ch3;
ch4_tmp = ch4;
ch5_tmp = ch5;
counter = 0;
}

if (ch0_tmp == counter) PORTB_BAK LEDOFF CH0_B;
if (ch1_tmp == counter) PORTB_BAK LEDOFF CH1_B;
if (ch2_tmp == counter) PORTB_BAK LEDOFF CH2_B;
if (ch3_tmp == counter) PORTD_BAK LEDOFF CH3_D;
if (ch4_tmp == counter) PORTD_BAK LEDOFF CH4_D;
if (ch5_tmp == counter) PORTD_BAK LEDOFF CH5_D;

PORTB = PORTB_BAK;
PORTD = PORTD_BAK;

if (ms1++ == 32)
{
ms1=0;
TMR1MS++;
}

}

unsigned int SetDelay (unsigned int t)
{
unsigned char temp_hi;
unsigned char temp_lo;

temp_hi = (TMR1MS >> 8);
temp_lo = (TMR1MS & 0xff);
if (temp_hi != (TMR1MS >> 8)) temp_hi = (TMR1MS >> 8);

return(((temp_hi << 8) | temp_lo) + t + 1);

}

char CheckDelay(unsigned int t)
{
unsigned char temp_hi;
unsigned char temp_lo;

temp_hi = (TMR1MS >> 8);
temp_lo = (TMR1MS & 0xff);
if (temp_hi != (TMR1MS >> 8)) temp_hi = (TMR1MS >> 8);

return(((t - ((temp_hi << 8) | temp_lo)) & 0x8000) >> 9);

}

/*##############################################################################*/
void StartPWM(void)
{
//Timer 0 Config for getting right timing for IR Pattern
TCCR0 = (0<<CS02)|(0<<CS01)|(1<<CS00); // (@8MHz) = 1/8us Clk = 256/8 = 32us overflow
TIMSK setbit (1<<TOIE0); // enable Int

}

/*##############################################################################*/
void StartPPM(void)
{

//global timer1 Config
TCCR1A = (0<<COM1A1)|(0<<COM1A0)|(0<<COM1B1)|(0<<COM1B0)|
(0<<FOC1A) |(0<<FOC1B) |(0<<WGM10) |(0<<WGM11);
TCCR1B = (1<<ICNC1)|(1<<ICES1)|(0<<WGM13)|
(0<<WGM12)|(0<<CS12)|(1<<CS11)|(0<<CS10); //ICP_POS_FLANKE

// interrupts
TIMSK |= (1<<TICIE1)|(1<<TOIE1); //ICP_INT_ENABLE and TIMER1_INT_ENABLE

}

/*##############################################################################*/
unsigned int GetPPM(void)
{
//this routines seems to be nesseccary, as reading a 16 bit value
//on a 8 bit machine is not atomic, so if an interrupt apears between reading
//low and high byte of the 16 bit value a wrong result is possible

unsigned char temp_hi;
unsigned char temp_lo;

temp_hi = (ppm_signal >> 8);
temp_lo = (ppm_signal & 0xff);
if (temp_hi != (ppm_signal >> 8)) temp_hi = (ppm_signal >> 8);
return( (temp_hi << 8) | temp_lo);

}

/*##############################################################################*/
// MAIN
/*##############################################################################*/
int main (void)
{

#define step 128
#define mul 2

#define sigeepadr 0x00
#define mineepadr 0x20
#define maxeepadr 0x22
#define eepsig 0x55aa

unsigned int ppm;
unsigned int setupdly;
unsigned int ppmtodly;
unsigned int lmax;
unsigned int lmin;
unsigned int max;
unsigned int min;
unsigned int sig;
unsigned char setup;

DDRB = (CH0_B|CH1_B|CH2_B);
PORTB = 0x00;

DDRC = (ledred);
PORTC = 0x00;

DDRD = (ledgreen|CH3_D|CH4_D|CH5_D);
PORTD = 0x00;

ch0 = 0;
ch1 = 0;
ch2 = 0;
ch3 = 0;
ch4 = 0;
ch5 = 0;

lmax = 0x0000;
lmin = 0xffff;

StartUART();
StartPPM();
//StartI2C();
StartPWM();
sei();

min = 1100;
max = 1900;

if (eeprom_read_word(sigeepadr) != eepsig)
{
eeprom_write_word(mineepadr, min);
eeprom_write_word(maxeepadr, max);
eeprom_write_word(sigeepadr, eepsig);
}
else
{
min = eeprom_read_word(mineepadr);
max = eeprom_read_word(maxeepadr);
}

printf("ppm: %d / min: %d / max: %d\n",ppm,min,max);

setup = 0;
setupdly = SetDelay(3000);
ppmtodly = SetDelay(5000);

while (1)
{

if (ppm_new > 20)
{
PORTC clrbit ledred;
ppm = GetPPM();
ppmtodly = SetDelay(500);
if (lmax < ppm) lmax=ppm;
if (lmin > ppm) lmin=ppm;
}
else
{
PORTC setbit ledred;
ppm = min;
}

if (CheckDelay(ppmtodly))
{
ppmtodly = SetDelay(5000);
ppm_new = 0;
}

if ((ppm > 1600) && ((setup&1)==0)) setup++;
if ((ppm < 1400) && ((setup&1)==1)) setup++;
if (setup == 6)
{
PORTD setbit ledgreen;
eeprom_write_word(mineepadr, lmin);
eeprom_write_word(maxeepadr, lmax);
min = lmin;
max = lmax;
setupdly = SetDelay(2000);
}
if (CheckDelay(setupdly))
{
setup = 0;
PORTD clrbit ledgreen;
}

//printf("ppm: %d / min: %d / max: %d\n",ppm,lmin,lmax);

/*
// Farbablauf: rot > Violett > blau > tuerkis > gruen > gelb >
if ((ppm >= (step * 0)) && (ppm < (step * 1)))
{
ch0 = mul * ((ppm - (step * 0))); //fade in red > red (red only)
ch1 = 0;
ch2 = 0;
}
if ((ppm >= (step * 1)) && (ppm < (step * 2)))
{
ch0 = ((step-1) * mul);
ch2 = mul * ((ppm - (step * 1))); //fade in blue > purple (red + blue)
ch1 = 0;
}
if ((ppm >= (step * 2)) && (ppm < (step * 3)))
{
ch0 = mul * ((step - 1) - (ppm - (step * 2))); //fade out red > blue (blue only)
ch2 = ((step-1) * mul);
ch1 = 0;
}
if ((ppm >= (step * 3)) && (ppm < (step * 4)))
{
ch0 = 0;
ch2 = ((step-1) * mul);
ch1 = mul * ((ppm - (step * 3))); //fade in green > tuerkis (blue + green)
}
if ((ppm >= (step * 4)) && (ppm < (step * 5)))
{
ch0 = 0;
ch2 = mul * ((step - 1) - (ppm - (step * 4))); //fade out blue > green (green only)
ch1 = ((step-1) * mul);
}
if ((ppm >= (step * 5)) && (ppm < (step * 6)))
{
ch0 = mul * ((ppm - (step * 5))); //fade in red > yellow (green + red)
ch2 = 0;
ch1 = ((step-1) * mul);
}
if ((ppm >= (step * 6)) && (ppm < (step * 7)))
{
ch0 = ((step-1) * mul);
ch2 = 0;
ch1 = mul * ((step - 1) - (ppm - (step * 6))); //fade out green > red (red only)
}
if ((ppm >= (step * 7)) )
{
ch0 = ((step-1) * mul);
ch2 = 0;
ch1 = 9;
}
*/

}

}

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