Move source code to firmware directory

firmware/main.c

@@ -0,0 +1,37 @@
+#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
+
+int main() 
+{
+  keyboard_init();
+  ptimer_init();
+  i2c_init(I2C_BITRATE); 
+  rtc_int0_init();
+  led_init();
+
+  sei();
+
+  led_hour = 0;
+  led_minute = 0;
+  led_second = 0;  
+
+  while(1) 
+  {
+    keyboard_handle_input();
+  }
+}
+
+ISR(INT0_vect)
+{
+  struct time curr_time = rtc_read_time();
+  led_hour = curr_time.hour;
+  led_minute = curr_time.minute;
+  led_second = curr_time.second;
+}