Tested and working.

src/main.c

@@ -23,65 +23,100 @@
 #include <avr/io.h>
 #include <util/delay.h>
 
+#define SW1PIN (1<<5)
+#define SW2PIN (1<<4)
+#define RELAYPIN (1<<1)
+#define RELAYREADINGPIN (1<<7) //It would be better to use PA7 so USART worked
+
 
 //char msg[] = "Attiny404:\n\r";
 char maketime_msg[] = "\r\nMake Time(10Khz):";
-char hi_msg[] = " Hi byte: ";
+char breaktime_msg[] = "\r\nBreak Time(10Khz):";
-char lo_msg[] = " Lo byte: ";
-char overflow_count_msg[] = " Overflows: "; 
-//char breaktime_msg[] = "Break Time(10Khz):";
-char hex_msg[3];
 
 //Set the function pointer for the delay func
 void (*Delay_MicroSeconds)(double us) = _delay_us;
 
-void delay_period()
+void SW1_Wait(void)
 { 
-    Timer_Enable();
+    //poll the input.
-    Timer_BlockingWait();
+    while(PORTA.IN & SW1PIN){}
-    Timer_Disable();
+}
+
+void SW2_Wait(void)
+{ 
+    //poll the input.
+    while(PORTA.IN & SW2PIN){}
+}
+
+
+void Activate_Relay(void)
+{
+    PORTA.OUT |= RELAYPIN;
+}
+
+void Deactivate_Relay(void)
+{
+    PORTA.OUT &= ~RELAYPIN;
+}
+
+
+void WaitForRelayConnect(void)
+{
+    while(!(PORTA.IN & RELAYREADINGPIN)){;}
+}
+
+void WaitForRelayDisconnect(void)
+{
+    while(PORTA.IN & RELAYREADINGPIN){;}
 }
 
 
 int main(int argc, char **argv)
 {
     USART0_Init();
-    //Timer_SelectClock();
-    //Timer_Period();
-    PORTA.DIR |= (1<<7);
 
-    uint16_t cnt = 0;
+    PORTA.DIR |= RELAYPIN;
-    uint8_t hi, lo;
+    PORTA.DIR &= ~RELAYREADINGPIN;
+    PORTA.DIR &= ~SW1PIN;
+    PORTA.DIR &= ~SW2PIN;
+
+    //PORTA.OUT |= RELAYPIN;
+
+    //uint16_t cnt = 0;
+    //uint8_t hi, lo;
+    uint16_t make_time = 0;
+    uint16_t break_time = 0;
+    
+    /*
+    WaitForRelayConnect();
+    Activate_Relay();
+    WaitForRelayDisconnect();
+    Deactivate_Relay();
+    */
+
+    while(true) {
+        SW1_Wait();
+        Activate_Relay();
 
-    while(true){
         Timer_Start();
-        _delay_ms(250);
+        WaitForRelayConnect();
         Timer_Disable(); 
-        cnt = Timer_GetOverflowCount();
+
+        make_time = Timer_GetOverflowCount();
+
+        SW2_Wait();
+        Deactivate_Relay();
+
+        Timer_Start();
+        WaitForRelayDisconnect();
+        Timer_Disable();
+
+        break_time = Timer_GetOverflowCount();
 
         USART0_sendString(maketime_msg);
-
+        USART0_sendChar((uint8_t)(0xFF & make_time)); 
-        hi = (uint8_t)(cnt >> 8);
-        lo = (uint8_t) (cnt & 0x00FF);
-
-        USART0_sendString(hi_msg);
-        USART0_sendChar(hi);
-        //USART0_sendString(hex_msg);
-
-        USART0_sendString(lo_msg);
-        USART0_sendChar(lo);
-        
-
-
-        /*
-        USART0_sendString(msg);
-        USART0_sendString(maketime_msg);
-        USART0_sendChar('\r');
-        USART0_sendChar('\n');
         USART0_sendString(breaktime_msg);
-        USART0_sendChar('\r');
+        USART0_sendChar((uint8_t)(0xFF & break_time)); 
-        USART0_sendChar('\n');
+
-        */
-        ;   //Do nothing until new Power cycle/reset occurs
     }
 }