1 files changed, 4 insertions, 3 deletions
diff --git a/uart.c b/uart.c
index df3243f..fcc5783 100644
--- a/uart.c
+++ b/uart.c
@@ -1,4 +1,5 @@
-static char txbuf[64];
+#define TXBSIZE 128
+static char txbuf[TXBSIZE];
 static uint8_t txput = 0, txsend = 0;
 
 ISR(USART_RX_vect)
@@ -11,7 +12,7 @@ ISR(USART_UDRE_vect)
 	if (txsend != txput) {
 		UDR0 = txbuf[txsend];
 		txsend++;
-		txsend &= 63;
+		txsend &= TXBSIZE - 1;
 		UCSR0B = (1 << RXCIE0) | (1 << UDRIE0) | (1 << RXEN0) | (1 << TXEN0);
 	} else {
 		UCSR0B = (1 << RXCIE0) | (1 << RXEN0) | (1 << TXEN0);
@@ -22,7 +23,7 @@ static void _uart_putch(const char ch)
 {
 	txbuf[txput] = ch;
 	txput++;
-	txput &= 63;
+	txput &= TXBSIZE - 1;
 }
 
 static void uart_putpgm(PGM_P str)