~ruther/avr-shift-registers

ref: 1f2a92a06212f4f39cef70035f3250a2ae43e640 avr-shift-registers/src/sr/util.c -rw-r--r-- 546 bytes
1f2a92a0 — František Boháček fix: code 5 years ago 
                                                                                
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#include "shift_register_internal.h"

void set_value_to(volatile byte* reg, byte position, byte value)
{
    if (value == 1) {
        (*reg) |= (1 << position);
    } else if (value == 0) {
        (*reg) &= ~(1 << position); // TODO: check this one
    }
}

void set_value(volatile byte* reg, byte position)
{
    set_value_to(reg, position, 1);
}

void reset_value(volatile byte* reg, byte position)
{
    set_value_to(reg, position, 0);
}

bool get_value(volatile byte* reg, byte position)
{
    return (*reg & (1 << position)) >> position;
}