From eb498a4fbc5937d52f6dbfde1c3dd8eb0678cf81 Mon Sep 17 00:00:00 2001
From: vlahan <vlahan>
Date: Tue, 10 Jul 2007 00:49:41 +0000
Subject: [PATCH] - Fix UartByte to properly disable interrupts before
 busywaiting on the TX interrupt flag, and clear the flag and enable
 interrupts back afterwards, problem reported by David M.

---
 tos/chips/msp430/usart/Msp430UartP.nc | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/tos/chips/msp430/usart/Msp430UartP.nc b/tos/chips/msp430/usart/Msp430UartP.nc
index 290fb606..9393595c 100644
--- a/tos/chips/msp430/usart/Msp430UartP.nc
+++ b/tos/chips/msp430/usart/Msp430UartP.nc
@@ -157,10 +157,13 @@ implementation {
     }
   }
   
-  async command error_t UartByte.send( uint8_t data ) {
-    call Usart.tx( data );
-    while( !call Usart.isTxIntrPending() );
-    call Usart.clrTxIntr();
+    async command error_t UartByte.send( uint8_t data ) {
+      call Usart.clrTxIntr();
+      call Usart.disableTxIntr ();
+      call Usart.tx( data );
+      while( !call Usart.isTxIntrPending() );
+      call Usart.clrTxIntr();
+      call Usart.enableTxIntr();
     return SUCCESS;
   }
   
-- 
2.39.2