bitmanipulation zu kompliziert?

sbit lowbit at P2.B0;

sbit highbit at P2.B1;

sbit button_0 at P1.B1;

sbit led_1 at P1.B6;

sbit led_2 at P1.B7;

void main() {

unsigned char buffer = 0x00;

unsigned char val_new = 0x00;

unsigned char val_old = 0x00;

unsigned char same;

lowbit = 1;         //input

highbit = 1;        //input

button_0 = 1;       //input

led_1 = 0;          //output

led_2 = 0;          //output

     while(1){

     if (button_0 == 0){                  //is the button pressed?

        while (button_0 == 0);            //is the button still pressed?

        buffer = highbit;               // if highbit 1 --> buffer = 00000001

        buffer <<= 1;                   // buffer = 00000010

        val_new = buffer;               // val_new = 00000010

        buffer = lowbit;                // if lowbit 1 --> buffer = 00000001

        val_new |= buffer;              // val_new = 00000011

        if (val_new > val_old){

           led_1 = 1;

           delay_ms (1000);

           led_1 = 0;

           }

           else if (val_new < val_old){

           led_2 = 0;

           delay_ms (1000);

           led_2 = 1;

           }

           else {

           same++;

           }

        val_old = val_new;

        }

     }

}