Enable setting the clock time via keyboard

main.c

@@ -1,16 +1,16 @@
 #include <avr/io.h>
 #include <avr/interrupt.h>
+#include "keyboard.h"
 #include "ptimer.h"
 #include "i2c.h"
 #include "rtc.h"
 #include "led.h"
 
 #define I2C_BITRATE 100000UL // 100kHz
-#define RTC_I2C_ADDR 0xA2
-
 
 int main() 
 {
+  keyboard_init();
   ptimer_init();
   i2c_init(I2C_BITRATE); 
   rtc_int0_init();
@@ -20,17 +20,17 @@ int main()
 
   led_hour = 0;
   led_minute = 0;
-  led_second = 0;
+  led_second = 0;  
 
   while(1) 
   {
-
+    keyboard_handle_input();
   }
 }
 
 ISR(INT0_vect)
 {
-  struct time curr_time = rtc_read_time(RTC_I2C_ADDR);
+  struct time curr_time = rtc_read_time();
   led_hour = curr_time.hour;
   led_minute = curr_time.minute;
   led_second = curr_time.second;