From 18ffc47807b47fd5e50d4d8a0ee7f5f01c82c7f2 Mon Sep 17 00:00:00 2001
From: Kelvin Lawson <kelvin@laptop.(none)>
Date: Mon, 3 May 2010 12:57:41 +0100
Subject: [PATCH] STM8 uart.c: Return mutex to allow multiple threads access to
 the UART.

---
 ports/stm8/uart.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/ports/stm8/uart.c b/ports/stm8/uart.c
index 026d3f6..732a769 100644
--- a/ports/stm8/uart.c
+++ b/ports/stm8/uart.c
@@ -67,7 +67,10 @@ char putchar (char c)
         /* Loop until the end of transmission */
         while (UART2_GetFlagStatus(UART2_FLAG_TXE) == RESET)
             ;
-
+
+        /* Return mutex access */
+        atomMutexPut(&uart_mutex);
+
     }
 
     return (c);