00001c76 <KBD_Scan>:

uint8_t KBD_Scan() {
    uint8_t keyb, nokey;
    nokey=1;
    keyb=0;
    CLEARBIT(PORTA, KBV1);
    1c76:   dd 98           cbi 0x1b, 5 ; 27
    //_delay_us(1);
    if (!CHECKBIT(PINA,KBH1)) {
    1c78:   c9 99           sbic    0x19, 1 ; 25
    1c7a:   02 c0           rjmp    .+4         ; 0x1c80 <KBD_Scan+0xa>
        keyb=42;
    1c7c:   8a e2           ldi r24, 0x2A   ; 42
    1c7e:   01 c0           rjmp    .+2         ; 0x1c82 <KBD_Scan+0xc>
//static uint8_t keycode;

uint8_t KBD_Scan() {
    uint8_t keyb, nokey;
    nokey=1;
    keyb=0;
    1c80:   80 e0           ldi r24, 0x00   ; 0
    //_delay_us(1);
    if (!CHECKBIT(PINA,KBH1)) {
        keyb=42;
        nokey=0;
    }
    if (!CHECKBIT(PINA,KBH2)) {
    1c82:   c8 9b           sbis    0x19, 0 ; 25
        keyb=55;
    1c84:   87 e3           ldi r24, 0x37   ; 55
        nokey=0;
    }
    if (!CHECKBIT(PING,KBH3)) {
    1c86:   90 91 63 00     lds r25, 0x0063
    1c8a:   90 ff           sbrs    r25, 0
        keyb=52;
    1c8c:   84 e3           ldi r24, 0x34   ; 52
        nokey=0;
    }
    if (!CHECKBIT(PING,KBH4)) {
    1c8e:   90 91 63 00     lds r25, 0x0063
    1c92:   91 ff           sbrs    r25, 1
        keyb=49;
    1c94:   81 e3           ldi r24, 0x31   ; 49
        nokey=0;
    }
    SETBIT(PORTA, KBV1);
    1c96:   dd 9a           sbi 0x1b, 5 ; 27
    CLEARBIT(PORTA, KBV2);
    1c98:   dc 98           cbi 0x1b, 4 ; 27
    #else
        //round up by default
        __ticks_dc = (uint32_t)(ceil(fabs(__tmp)));
    #endif

    __builtin_avr_delay_cycles(__ticks_dc);
    1c9a:   95 e0           ldi r25, 0x05   ; 5
    1c9c:   9a 95           dec r25
    1c9e:   f1 f7           brne    .-4         ; 0x1c9c <KBD_Scan+0x26>
    _delay_us(1);
    if (!CHECKBIT(PINA,KBH1)) {