From: vlahan <vlahan>
Date: Tue, 10 Jul 2007 00:49:41 +0000 (+0000)
Subject: - Fix UartByte to properly disable interrupts before busywaiting on the TX interrupt... 
X-Git-Tag: release_tools_1_2_4_1~61
X-Git-Url: https://oss.titaniummirror.com/gitweb/?a=commitdiff_plain;h=eb498a4fbc5937d52f6dbfde1c3dd8eb0678cf81;p=tinyos-2.x.git

- 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.
---

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;
   }