-static void PCint(uint8_t port) {
- byte input = ( INPUT_SIG_PORTB & ~ PINB ) | ( ( INPUT_SIG_PORTC & ~ PINC ) <<1 ) |( INPUT_SIG_PORTD & ~ PIND );
- byte output = ( OUTPUT_SIG_PORTC & ~ PINC ) | (( OUTPUT_SIG_PORTD & ~ PIND ) <<2 ); // no output on B
+static void PCint() {
+ byte PINB_COPY = PINB;
+ byte PINC_COPY = PINC;
+ byte PIND_COPY = PIND;
+ byte output = ( OUTPUT_SIG_PORTC & ~ PINC_COPY ) | (( OUTPUT_SIG_PORTD & ~ PIND_COPY ) <<2 ); // no output on B
+ byte input = ( INPUT_SIG_PORTB & ~ PINB_COPY ) | ( ( INPUT_SIG_PORTC & ~ PINC_COPY ) <<1 ) |( INPUT_SIG_PORTD & ~ PIND_COPY );