//***********************************************************************************
uint8_t main()
{
uint16_t sum=0;
uint8_t digit=0;
//set port bits 4-7 B as outputs
DDRB = 0xF0;
PORTB = 0x00;
while(1){
//insert loop delay for debounce
_delay_ms(3);
//make PORTA an input port with pullups
DDRA = 0x00;
PORTA = 0xFF;
//enable tristate buffer for pushbutton switches
PORTB |= 0x70;
//now check each button and increment the count as needed
for(uint8_t i=0; i<8; ++i){
sum += chk_buttons(i) << i;
}
//disable tristate buffer for pushbutton switches
PORTB &= 0x5F;
//bound the count to 0 - 1023
if(sum>1023){
//sum = (sum+1)%1024;
sum = 0;
segment_data[0] = 0x01;
segment_data[1] = 0x00;
segment_data[2] = 0x00;
segment_data[3] = 0x00;
segment_data[4] = 0x00;
}
// sum %= 1024;
//break up the disp_value to 4, BCD digits in the array: call (segsum)
segsum(sum);
//make PORTA an output
DDRA = 0xFF;
//prevent ghosting
PORTA = 0x00;
//send 7 segment code to LED segments
//TODO: why did I put dec_to_7seg here and it works?
PORTA = dec_to_7seg[segment_data[digit]];
//send PORTB the digit to display
PORTB = ((0x8<<4) & PORTB)|(digit<<4);
//update digit to display
digit = (++digit)%5;
}//while
return 0;
}//main
void
dollar(char *cp)
{
cp = nextc(cp);
switch(*cp) {
default:
Bprint(bioout, "?\n");
break;
case 'c':
case 'C':
stktrace(*cp);
break;
case 'b':
dobplist();
break;
case 'r':
dumpreg();
break;
case 'R':
dumpreg();
/* fall through */
case 'f':
dumpfreg();
break;
case 'F':
dumpdreg();
break;
case 'q':
exits(0);
break;
case 'Q':
isum();
segsum();
break;
case 't':
cp++;
switch(*cp) {
default:
Bprint(bioout, ":t[0sic]\n");
break;
case '\0':
trace = 1;
break;
case '0':
trace = 0;
sysdbg = 0;
calltree = 0;
break;
case 's':
sysdbg = 1;
break;
case 'i':
trace = 1;
break;
case 'c':
calltree = 1;
break;
}
break;
case 'i':
cp++;
switch(*cp) {
default:
Bprint(bioout, "$i[isa]\n");
break;
case 'i':
isum();
break;
case 's':
segsum();
break;
case 'a':
isum();
segsum();
iprofile();
break;
case 'p':
iprofile();
break;
}
}
}