Bit mathematics

Example:

#include <MemMath.h>

int main() {
    setLow(DDRB, 0);
    setHign(PORTB, 0);
    while (1) {
        if (bitIsLow(PINB, 0)) {
             waitLow(PINB, 0);
        }
    }
}

List of all functions:

• setLow(A, N)

Function sets bit N (zero-based) in variable A to zero. Example:

A = 0x05;
setLow(A, 2); // A == 0x01;

• setHigh(A, N) Function sets bit N (zero-based) in variable A to one. Example:

A = 0x01;
setHigh(A, 2); // A == 0x05;

• bitIsHigh(A, N) Function returns TRUE if bit N (zero-based) in variable A is one. Example:

A = 0x05;
bitIsHigh(A, 2); // TRUE;
bitIsHigh(A, 1); // FALSE;

• bitIsLow(A, N) Function returns TRUE if bit N (zero-based) in variable A is zero. Example:

A = 0x05;
bitIsLow(A, 2); // FALSE;
bitIsLow(A, 1); // TRUE;

• waitHigh(A, N) Function suspend main program while bit N (zero-based) in variable A is zero. Example:

A = 0x05;
waitHigh(A, 1); // Infinite sleep

• waitLow(A, N) Function suspend main program while bit N (zero-based) in variable A is one. Example:

A = 0x05;
waitLow(A, 2); // Infinite sleep