/* calibrates the sensor that is passed in */
unsigned short calibrate(unsigned char resistor) {
Set_A2D_Pin(resistor);
for(int i = 0; i < 100; ++i);
unsigned short avg = 0;
for(int i = 0; i < 10; ++i) avg += ADC;
return avg / 10;
}
/* check the value of a specific resistor like at 0x02 (pin 2)
and return whether it senses a shadow or not */
bool checkPhotoValue(unsigned char resistor) {
unsigned short photoValue;
switch(resistor) {
case 0x02:
photoValue = photoValueL;
break;
case 0x00:
photoValue = photoValueU;
break;
case 0x04:
photoValue = photoValueR;
break;
case 0x01:
photoValue = photoValueD;
break;
case 0x05:
photoValue = photoValueU2;
break;
case 0x06:
photoValue = photoValueD2;
break;
default:
return false;
break;
}
Set_A2D_Pin(resistor);
for(int i = 0; i < 100; ++i);
unsigned short input = ADC;
if(input < photoValue) {
return true;
} else {
return false;
}
}
int User_Tick(int state) {
// === Local Variables ===
unsigned short x_joystick = 512;
unsigned short y_joystick = 512;
unsigned char tmpA = PINA;
unsigned char pina2 = ~tmpA & 0x04;
// === Transitions ===
switch (state) {
case -1:
state = set_x;
break;
case set_x:
if (isgameover) { state = gameover; }
else { state = read_x; }
break;
case read_x:
if (isgameover) { state = gameover; }
else { state = set_y; }
break;
case set_y:
if (isgameover) { state = gameover; }
else { state = read_y; }
break;
case read_y:
if (isgameover) { state = gameover; }
else { state = set_x; }
break;
case gameover:
if (isreset) { state = -1; }
else { state = gameover; }
default:
state = set_x;
break;
}
// === Actions ===
switch (state) {
case set_x:
Set_A2D_Pin(0);
break;
case read_x:
x_joystick = ADC;
break;
case set_y:
Set_A2D_Pin(1);
break;
case read_y:
y_joystick = ADC;
break;
case gameover:
if (pina2) { isreset = 1; }
break;
default:
break;
}
if (y_joystick < 312) //up
{
if (user_row[0] != 0x01)
{
for (unsigned i=0; i<4; i++)
{
user_row[i] = user_row[i] >> 1;
}
}
}
else if (y_joystick > 712) //down
