X-Git-Url: https://git.karo-electronics.de/?p=oswald.git;a=blobdiff_plain;f=metawatch%2Fmw_uart.c;h=79b650e7f73ca46373c476c541f4a3f1b2011850;hp=16a1a29a8d26c764e5eade40c72eb96ba2720cf4;hb=1b5790095c23913d02531727e47b79af3568e0b1;hpb=3e320aaa4175a0ed469581f1dea2eac35b390878

diff --git a/metawatch/mw_uart.c b/metawatch/mw_uart.c
index 16a1a29..79b650e 100644
--- a/metawatch/mw_uart.c
+++ b/metawatch/mw_uart.c
@@ -16,12 +16,20 @@ void debug_uart_tx_char(char c);
 #pragma vector=USCI_A3_VECTOR
 __interrupt void UCA_ISR (void)
 {
-	/* clear IRQ flag */
-	UCA3IFG  &= ~UCRXIFG;
-	UART_RX_CHAR = UCA3RXBUF;
-	_event_src |= DBG_UART_RCV_EVENT;
-	/* wake up to handle the received char */
-	LPM3_EXIT;
+	switch (UCA3IV) {
+		case 2: // RXIFG
+			/* clear IRQ flag */
+			UCA3IFG  &= ~UCRXIFG;
+			UART_RX_CHAR = UCA3RXBUF;
+			_event_src |= DBG_UART_RCV_EVENT;
+			/* wake up to handle the received char */
+			LPM3_EXIT;
+			break;
+		case 4: // TXIFG
+			break;
+		default:
+			break;
+	}
 }
 
 void init_debug_uart(void)
@@ -36,7 +44,7 @@ void init_debug_uart(void)
 	/* 16,000,000 115200 138  7     0 */
 
 	UCA3BR0 = 138;
-	UCA3MCTL = UCBRS_7 + UCBRF_0;
+	UCA3MCTL = UCBRS_7 | UCBRF_0;
 
 	/* set P10.4 & P10.5 to UCA function */
 	P10SEL |= BIT4;
@@ -55,6 +63,8 @@ void init_debug_uart(void)
 
 void debug_uart_tx_char(const char c)
 {
+	while (UCA3STAT & UCBUSY)
+		nop();
 	UCA3TXBUF = c;
 	while ((UCA3IFG & UCTXIFG) == 0 )
 		nop();