uart.c: save resources if UART1 isn't used

src/uart/uart.c

@@ -245,7 +245,7 @@ static volatile unsigned char UART_RxHead;
 static volatile unsigned char UART_RxTail;
 static volatile unsigned char UART_LastRxError;
 
-#if defined( ATMEGA_USART1 )
+#if defined( ATMEGA_USART1 ) && defined (USE_UART1)
 static volatile unsigned char UART1_TxBuf[UART_TX_BUFFER_SIZE];
 static volatile unsigned char UART1_RxBuf[UART_RX_BUFFER_SIZE];
 static volatile unsigned char UART1_TxHead;
@@ -506,7 +506,7 @@ void uart_puts_p(const char *progmem_s )
 /*
  * these functions are only for ATmegas with two USART
  */
-#if defined( ATMEGA_USART1 )
+#if defined( ATMEGA_USART1 ) && defined (USE_UART1)
 
 ISR(UART1_RECEIVE_INTERRUPT)
 /*************************************************************************
@@ -565,9 +565,6 @@ Purpose:  called when the UART1 is ready to transmit the next byte
 }
 
 
-
-#if defined USE_UART1 || defined DOXYGEN
-
 /*************************************************************************
 Function: uart1_init()
 Purpose:  initialize UART1 and set baudrate
@@ -688,6 +685,4 @@ void uart1_puts_p(const char *progmem_s )
 
 }/* uart1_puts_p */
 
-#endif // defined USE_UART1 || defined DOXYGEN
-
 #endif

src/uart/uart_commands.c

@@ -285,10 +285,10 @@ static bool uartcmd_read_until_enter(void) {
 			case 27: // ignore Esc
 				break;
 			default:
-				// We don't accept control characters (except for \r and \n) and
-				// we also limit the input to 7 bit ASCII.
+				// We don't accept control characters except for \b, \r and \n.
+				// We also limit the input to 7 bit ASCII.
 				if ((uart_result < 0x20) || (uart_result > 0x7f)) {
-					uart_putc('\007'); // complain via ASCII bell
+					uart_putc('\a'); // complain via ASCII bell
 				} else {
 					g_rx_buffer[g_rx_index++] = uart_result; // accept input
 					uart_putc(uart_result); // echo input back to terminal