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//############################################################################
// - LED 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 char ch0;
volatile unsigned char ch1;
volatile unsigned char ch2;
volatile unsigned char ch3;
volatile unsigned char ch4;
volatile unsigned char ch5;
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 * 7 + ppm) / 8;
ppm_signal = ppm;
ppm_new = 1;
}
}
}
SIGNAL(SIG_OVERFLOW0)
{
static unsigned char counter;
unsigned char PORTB_BAK;
unsigned char PORTD_BAK;
PORTB_BAK = PORTB;
PORTD_BAK = PORTD;
if (counter == 0)
{
PORTB_BAK clrbit (CH0_B | CH1_B | CH2_B);
PORTD_BAK clrbit (CH3_D | CH4_D | CH5_D);
}
if (ch0 == 255)
{
PORTB_BAK setbit CH0_B;
}
if (ch0 == counter)
{
PORTB_BAK setbit CH0_B;
}
if (ch0 == 0)
{
PORTB_BAK clrbit CH0_B;
}
if (ch1 == counter)
{
PORTB_BAK setbit CH1_B;
}
if (ch2 == counter)
{
PORTB_BAK setbit CH2_B;
}
if (ch3 == counter)
{
PORTD_BAK setbit CH3_D;
}
if (ch4_BAK == counter)
{
PORTD setbit CH4_D;
}
if (ch5_BAK == counter)
{
PORTD setbit CH5_D;
}
}
}
counter++;
PORTB = PORTB_BAK;
PORTD = PORTD_BAK;
}
/*##############################################################################*/
void StartPWM(unsigned char txbyte)
{
//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
}
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 intmask;
unsigned int ppm_temp;
intmask = TIMSK; //backup interupt enable bits
TIMSK &= ~(1<<TICIE1); //disable ppm interrupt
ppm_temp = ppm_signal;
TIMSK = intmask; //restore interupt enable bits
return(ppm_temp); //return ppm_signal
}
/*##############################################################################*/
// MAIN
/*##############################################################################*/
int main (void)
{
DDRC = (1<<ledred);
PORTC = 0x00;
DDRD = (1<<ledgreen);
PORTD = 0x00;
DDRB = (1<<1)|(1<<2)|(1<<3);
PORTB = 0x00;
ch0 = 0;
ch1 = 0;
ch2 = 0;
ch3 = 0;
ch4 = 0;
ch5 = 0;
//StartUART();
StartPPM();
StartI2C();
StartPWM();
sei();
while (1)
{
//printf("%d ",ppm_signal);
}
}