From 19ede34bedb36684ff607dde29ec417cacafb75f Mon Sep 17 00:00:00 2001
From: Giovanni Di Sirio <gdisirio@gmail.com>
Date: Fri, 29 Dec 2017 09:47:19 +0000
Subject: [PATCH] Fixed bug #908.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@11209 35acf78f-673a-0410-8e92-d51de3d6d3f4
---
 os/hal/ports/STM32/LLD/USARTv1/hal_uart_lld.c | 4 ++++
 os/hal/ports/STM32/LLD/USARTv2/hal_uart_lld.c | 4 ++++
 readme.txt                                    | 2 ++
 3 files changed, 10 insertions(+)

diff --git a/os/hal/ports/STM32/LLD/USARTv1/hal_uart_lld.c b/os/hal/ports/STM32/LLD/USARTv1/hal_uart_lld.c
index 8cb5c1a8f..54c1632b3 100644
--- a/os/hal/ports/STM32/LLD/USARTv1/hal_uart_lld.c
+++ b/os/hal/ports/STM32/LLD/USARTv1/hal_uart_lld.c
@@ -733,7 +733,11 @@ void uart_lld_start_send(UARTDriver *uartp, size_t n, const void *txbuf) {
   /* Only enable TC interrupt if there's a callback attached to it or
      if called from uartSendFullTimeout(). Also we need to clear TC flag
      which could be set before.*/
+#if UART_USE_WAIT == TRUE
   if ((uartp->config->txend2_cb != NULL) || (uartp->early == false)) {
+#else
+  if (uartp->config->txend2_cb != NULL) {
+#endif
     uartp->usart->SR = ~USART_SR_TC;
     uartp->usart->CR1 |= USART_CR1_TCIE;
   }
diff --git a/os/hal/ports/STM32/LLD/USARTv2/hal_uart_lld.c b/os/hal/ports/STM32/LLD/USARTv2/hal_uart_lld.c
index 505cd537a..9fd66fa87 100644
--- a/os/hal/ports/STM32/LLD/USARTv2/hal_uart_lld.c
+++ b/os/hal/ports/STM32/LLD/USARTv2/hal_uart_lld.c
@@ -956,7 +956,11 @@ void uart_lld_start_send(UARTDriver *uartp, size_t n, const void *txbuf) {
   /* Only enable TC interrupt if there's a callback attached to it or
      if called from uartSendFullTimeout(). Also we need to clear TC flag
      which could be set before.*/
+#if UART_USE_WAIT == TRUE
   if ((uartp->config->txend2_cb != NULL) || (uartp->early == false)) {
+#else
+  if (uartp->config->txend2_cb != NULL) {
+#endif
     uartp->usart->ICR = USART_ICR_TCCF;
     uartp->usart->CR1 |= USART_CR1_TCIE;
   }
diff --git a/readme.txt b/readme.txt
index f1d5da336..ef218e421 100644
--- a/readme.txt
+++ b/readme.txt
@@ -165,6 +165,8 @@
        Updated the various platform.mk implementing "smart build" mode.
 - RT:  Fixed compile error with assertions enabled and dynamic extensions
        disabled (bug #909)(backported to 17.6.4).
+- HAL: Fixed compile error HAL UART without WAIT (bug #908)(backported to
+       17.6.4 and 16.1.10).
 - RT:  Fixed gcc7 implicit-fallthrough (bug #906)(backported to 17.6.4
        and 16.1.10).
 - HAL: Fixed gcc7 implicit-fallthrough (bug #906)(backported to 17.6.4