use macros to read/write ports

diff --git a/main.c b/main.c
index 5dd4f1d..e794376 100644 (file)
--- a/main.c
+++ b/main.c
@@ -19,9 +19,19 @@
 #endif
 
 /* port B */
-#define BUZ_BIT   0
-#define RADIO_BIT 2
-#define LED_BIT   4
+#define BUZZER_BIT    0
+#define BUZZER_ON()   PORTB |= _BV(BUZZER_BIT)
+#define BUZZER_OFF()  PORTB &= (~_BV(BUZZER_BIT))
+
+#define RADIO_BIT  2
+#define RADIO_READ() (!!(PINB & (_BV(RADIO_BIT))))
+
+#define BUTTON_BIT 3
+#define BUTTON_IS_PRESSED()  (!!(PINB & (_BV(BUTTON_BIT))))
+
+#define LED_BIT    4
+#define LED_ON()   PORTB |= _BV(LED_BIT)
+#define LED_OFF()  PORTB &= (~_BV(LED_BIT))
 
 static uint32_t bitfield;
 
@@ -330,7 +340,7 @@ static uint8_t get_input(int i)
 #ifdef HOST_VERSION
        return !!x[i];
 #else
-       return !!(PINB & (1 << RADIO_BIT));
+       return RADIO_READ();
 #endif
 }
 
@@ -348,15 +358,15 @@ static void set_output(int16_t i)
               i, pow_fond, pow_harm1, pow_other, cpt_filter, detected);
 #else
        if (detected)
-               PORTB |= (1 << LED_BIT);
+               LED_ON();
        else
-               PORTB &= ~(1 << LED_BIT);
+               LED_OFF();
 
        /* when we receive, output a square signal at 625 hz */
        if ((detected == 1) && (i & 4))
-               PORTB |= (1 << BUZ_BIT);
+               BUZZER_ON();
        else
-               PORTB &= ~(1 << BUZ_BIT);
+               BUZZER_OFF();
 #endif
 }
 
@@ -373,7 +383,7 @@ int main(void)
 
        /* led and buzzer are outputs */
 #if defined(__AVR_ATtiny45__)
-       DDRB |= (1 << LED_BIT) | (1 << BUZ_BIT);
+       DDRB |= (1 << LED_BIT) | (1 << BUZZER_BIT);
 #endif
 
        i = 0;