# Debut of the AJ4VD QRSS Gator

I re-wrote the code from the previous entry to do several things. Once of which was to make a gator rather than a fish. It’s more appropriate since I’m planning on housing the transmitter at the University of Florida. To do it, I drew a gator in paint and wrote a python script to convert the image into a series of points. I’ll post it later. One thing to note was that size was a SERIOUS issue. I only have two thousand bytes of code, and every point of that gator was a byte, so it was a memory hog. I helped it dramatically by using repeating segments wherever possible, and some creative math to help out the best I could (i.e., the spines on the back) Here’s what it looks like, and the code below it…

```#include <avr/io.h>
#include <util/delay.h>

// front top LED - PA0
// inside top LED - PA1
// inside bot LED - PA2
// front bot LED - PA3

unsigned long int t_unit; // units of time
const int tDit = 100; //units for a dit
const int tDah = 255; //units for a dah
char fsk; // degree of frequency shift to use for CW
char fsk2; // degree of frequency shift to use for HELL

char light = 0; // which lights are on/off

void delay(){
_delay_loop_2(t_unit);
}

return;
if (light==0){
PORTA|=(1<<PA0); //on
PORTA|=(1<<PA1); //on
PORTA&=~(1<<PA2); //off
PORTA&=~(1<<PA3); //off
light=1;
} else {
PORTA|=(1<<PA2); //on
PORTA|=(1<<PA3); //on
PORTA&=~(1<<PA0); //off
PORTA&=~(1<<PA1); //off
light=0;

}
}

void tick(unsigned long ticks){
while (ticks>0){
delay();
delay();
ticks--;
}
}

void pwm_init() {
//Output on PA6, OC1A pin (ATTiny44a)
OCR1A = 0x00; //enter the pulse width. We will use 0x00 for now, which is 0 power.
TCCR1A = 0x81; //8-bit, non inverted PWM
TCCR1B = 1; //start PWM
}

void set(int freq, int dly){
OCR1A = freq;
tick(dly);
}

void fish(){
char mult = 3;

char f2[]={2, 3, 4, 5, 6, 7, 4, 3, 7, 4, 7, 7, 6, 5, 4, 3, 2, 2, 2, 3, 3, 3, 2, 2, 2, 3, 3, 3, 2, 2, 2, 3, 4, 5, 6, 7, 8, 4, 9, 5, 9, 6, 9, 6, 9, 6, 9, 8, 8, 7, 7, 6, 5, 4, 3, 3, 3, 4, 5, 5};

for (int i=0;i<sizeof(f2);i++) {
OCR1A = f2[i]*mult;
tick(20);
OCR1A = 1*mult;
tick(20);
}

char f3[]={1,2,3,4,3,2};

char offset=0;
while (offset<9){
for (char j=0;j<3;j++){
for (char i=0;i<sizeof(f3);i++){
char val = (f3[i]+5-offset)*mult;
if (val<mult || val > 10*mult){val=mult;}
OCR1A = val;
tick(20);
OCR1A = 1*mult;
tick(20);
}
}
offset++;
}

}

void id(){
char f[]={0,0,1,2,0,1,2,2,2,0,1,1,1,1,2,0,1,1,1,2,0,2,1,1,0,0};
char i=0;
while (i<sizeof(f)) {
if (f[i]==0){OCR1A = 0;tick(tDah);}
if (f[i]==1){OCR1A = fsk;tick(tDit);}
if (f[i]==2){OCR1A = fsk;tick(tDah);}
OCR1A=0;
tick(tDit);
i++;
}
}

void slope(){
char i=0;
while (i<25){
OCR1A = 255-i;
i++;
}
while (i>0){
i--;
OCR1A = 255-i;
}
}

int main(void)
{
DDRA = 255;
pwm_init();
t_unit=1000;fsk=10;id(); // set to fast and ID once
//fsk=50;//t_unit = 65536; // set to slow for QRSS
t_unit=60000;

while(1){;
fish();
id();
}

return 1;
}
```