Fixed blocking on full rx buffer and implemented support for ATmega328P

hardware1.hpp

@@ -84,8 +84,6 @@ extern void (*fnDataReg1EmptyIntHandler)();
 
 #define HAS_UART1
 
-#else
-#error "This chip is not supported"
 #endif
 
 } // namespace detail
@@ -217,11 +215,15 @@ class Hardware1<cfg, Driven::INTERRUPT, mode> {
 
 	static void rxIntHandler()
 	{
+		auto data = HardwareImpl::rxByteInterrupt();
+
 		uint8_t tmpHead = (sm_rxBuf.head + 1) % RX_BUFFER_SIZE;
 
 		if (tmpHead != sm_rxBuf.tail) {
 			sm_rxBuf.head = tmpHead;
-			sm_rxBuf.buf[tmpHead] = HardwareImpl::rxByteInterrupt();
+			sm_rxBuf.buf[tmpHead] = data;
+		} else {
+			// TODO: Handle overflow
 		}
 	}