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134
main.c
134
main.c
@ -1,4 +1,3 @@
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#include<avr/power.h>
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#include<util/delay.h>
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#include<avr/io.h>
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#include"fix_fft.h"
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@ -30,55 +29,26 @@
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//7- 880
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//8- 1kHz
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//
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const float log_scale = 64./log(64./SCALE_FACTOR + 1.);
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int sec;
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uint16_t ticks;
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int ticks_sample;
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ISR(TIMER1_OVF_vect)
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{
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ticks_sample++;
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if(ticks < 65000)
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{
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ticks++;
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}
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if(ticks >= 65000)
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{
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ticks=0;
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if(sec<255)
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{
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sec++;
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}
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else
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{
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sec=0;
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}
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}
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}
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int msec;
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int main (void)
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{
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int i,i2;
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int i4=0;
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int colorb;
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int colora;
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int sum,avg;
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char sample[64];
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char im[64];
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char buff[64];
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float fac_r=0.1;
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float fac_g=0.5;
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float fac_b=0.7;
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sec=0;
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ticks=0;
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ticks_sample=0;
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char temp;
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msec=0;
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struct cRGB led_bar1[8];
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Fader fader1[4]={{5,5,5},{7,3,2},{3,7,2},{2,3,7}};
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//DDRB = (1<<mic);//would be setting output, default is input so no need for setting
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setupADC();
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setupTimer();
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//OSCCAL = 250;//overclock!!! to 30MHz
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OSCCAL = 240;//overclock!!! to 30MHz
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for(i=0;i<8;i++)
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{
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led_bar1[i].r=0;
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@ -93,87 +63,82 @@ int main (void)
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sei();
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while(1)
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{
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//######RECORD SAMPLES######
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//######RECORD SAMPLES######
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sum = 0;
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ticks_sample=0;
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if(sec>3)
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{
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fac_r=(float)fader1[i4].r/10;
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fac_g=(float)fader1[i4].g/10;
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fac_b=(float)fader1[i4].b/10;
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if(i4<3) {i4++;}
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else {i4=0;}
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sec=0;
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}
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for(i=0;i<64;i++)
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{
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msec=0;
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STARTADC;
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sample[i] = (ADCH-128); //read Analog value register 8bit center -128
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//sample[i] = (sample[i] <= NOISE) ? 0 : (sample[i] - NOISE); //noise reduction
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im[i]=0; //pseudo data for funciton
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//
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sum+=sample[i];//dc-bias
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}
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//while(msec==0);
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}
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avg = sum/64;//calculate bias
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for(i=0;i<64;i++)
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{
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sample[i]-=avg;//remove bias
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}
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fix_fftr(sample,6,0);
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//####Averaging Data####
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fix_fftr(sample,6,0);//im[i] is always zero
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//####Averaging Data####
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//
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for(i=0;i<64;i++)
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{
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if(sample[i]<0) sample[i] = 0;
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if(sample[i]>64) sample[i]=64; //define upper limit
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if(sample[i]>64) sample[i]=64;
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sample[i] = sample[i] *SCALE_FACTOR;
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sample[i] = (sample[i]*0.7 + buff[i]*0.3); //influence of last sample on current sample
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buff[i] = sample[i]; //store sample for next round
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sample[i] = (sample[i]*0.7 + buff[i]*0.3);
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buff[i] = sample[i];
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}
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for(i=0;i<8;i++) //we store 8 frequency domains acros the whole 64 stpectrum
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for(i=0;i<8;i++)
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{
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for(i2=1;i2<=4;i2++)
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{
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sample[i] = ((sample[i] + sample[i*8+i2])/2);//average each 4 following spectrums, write results to sample[0..7]
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sample[i] = ((sample[i] + sample[i*8+i2])/2);
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}
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//avg written to sample[0..7]
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if(sample[i]<20)
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{
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led_bar1[i].r=(char)sample[i]*fac_r;
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led_bar1[i].g=(char)sample[i]*fac_g;
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led_bar1[i].b=(char)sample[i]*fac_b;
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led_bar1[i].r=0;
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led_bar1[i].g=0;
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led_bar1[i].b=sample[i];
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}
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else if(sample[i]<30)
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else if(sample[i]<40)
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{
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led_bar1[i].r=(char)sample[i]*fac_r*2;
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led_bar1[i].g=(char)sample[i]*fac_g/2;
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led_bar1[i].b=(char)sample[i]*fac_b/2;
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led_bar1[i].r=0;
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led_bar1[i].g=sample[i];
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led_bar1[i].b=sample[i]/2;
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}
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else if(sample[i]<50)
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else if(sample[i]<60)
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{
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led_bar1[i].r=(char)sample[i]*fac_r*2;
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led_bar1[i].g=(char)sample[i]*fac_g*2;
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led_bar1[i].b=(char)sample[i]*fac_b*2;
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led_bar1[i].r=sample[i];
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led_bar1[i].g=0;
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led_bar1[i].b=sample[i]/2;
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}
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}
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ws2812_setleds(led_bar1,8);
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while(ticks_sample<60){asm("");}//workaround for stoping gcc optimizing
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}
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return 0;
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}
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int map(int value, int old_min, int old_max,int new_min, int new_max)
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{
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return (new_max/old_max*value);
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}
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void setupTimer(void)
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{
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clock_prescale_set(0);
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TCCR1 = (1<<CS10);//|(1<<CS10)|(1<<CTC1); /8 //clear timer on compare match
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TCCR1 = (1<<CS13)|(1<<CS10)|(1<<CTC1); //clear timer on compare match
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GTCCR = 0; //default values should be ok
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//OCR1C = 117; //Compare value of timer / overflow , sets OCF1A
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//OCR1A = 117;
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TIMSK |= (1<<TOIE1);//|(1<<TOIE1); //timer0 ovf
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TIFR |= (1<<TOV1); //flag register "aka when to interrupt
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OCR1C = 117; //Compare value of timer / overflow , sets OCF1A
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OCR1A = 117;
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TIMSK = (1<<OCIE1A);//|(1<<TOIE1); //enable interupt compare a
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TIFR = (1<<OCF1A); //flag register "aka when to interrupt
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}
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/*
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* 1/(30Mhz/16384) *255 = 0.139264s Time for one overflow
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@ -182,3 +147,14 @@ void setupTimer(void)
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* 255/0.017204*0.001=15 counts = 1ms
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* 256 gives 1ms
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*/
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void wait_period(void)
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{
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// TIFR |=(1<<TOV1); //clear overflow flag
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}
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ISR(TIMER1_COMPA_vect)
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{
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msec++;
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}
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8
makefile
8
makefile
@ -10,7 +10,7 @@ FORMAT = ihex
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TARGET = main
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SRC = $(TARGET).c avr_adc.c fix_fft.c light_ws2812_AVR/Light_WS2812/light_ws2812.c
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ASRC =
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OPT = 1
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OPT = s
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# Name of this Makefile (used for "make depend").
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MAKEFILE = Makefile
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@ -18,7 +18,7 @@ MAKEFILE = Makefile
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# Debugging format.
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# Native formats for AVR-GCC's -g are stabs [default], or dwarf-2.
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# AVR (extended) COFF requires stabs, plus an avr-objcopy run.
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#DEBUG = stabs
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DEBUG = stabs
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# Compiler flag to set the C Standard level.
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# c89 - "ANSI" C
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@ -28,7 +28,7 @@ MAKEFILE = Makefile
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CSTANDARD = -std=gnu99
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# Place -D or -U options here
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CDEFS = -D F_CPU=16000000UL
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CDEFS = -DF_CPU=30000000UL
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# Place -I options here
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CINCS =
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@ -38,7 +38,7 @@ CDEBUG = -g$(DEBUG)
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CWARN = -Wall -Wstrict-prototypes
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CTUNING = -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
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#CEXTRA = -Wa,-adhlns=$(<:.c=.lst)
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CFLAGS = $(CDEBUG) $(CDEFS) $(CINCS) -O$(OPT) $(CWARN) $(CSTANDARD)# $(CEXTRA)
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CFLAGS = $(CDEBUG) $(CDEFS) $(CINCS) -O$(OPT) $(CWARN) $(CSTANDARD) $(CEXTRA)
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#ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs
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