From dcc6ecfa7565a1821d46950a5354bfed269d8e91 Mon Sep 17 00:00:00 2001
From: rusefi <qweZXC21>
Date: Sun, 14 May 2017 15:46:13 -0400
Subject: [PATCH] #414

---
 firmware/config/stm32f4ems/mcuconf.h | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/firmware/config/stm32f4ems/mcuconf.h b/firmware/config/stm32f4ems/mcuconf.h
index b5d1cb636e..e4f536176f 100644
--- a/firmware/config/stm32f4ems/mcuconf.h
+++ b/firmware/config/stm32f4ems/mcuconf.h
@@ -280,12 +280,15 @@
 #define STM32_SERIAL_USE_UART4              FALSE
 #define STM32_SERIAL_USE_UART5              FALSE
 #define STM32_SERIAL_USE_USART6             FALSE
-#define STM32_SERIAL_USART1_PRIORITY        12
-#define STM32_SERIAL_USART2_PRIORITY        12
-#define STM32_SERIAL_USART3_PRIORITY        12
-#define STM32_SERIAL_UART4_PRIORITY         12
-#define STM32_SERIAL_UART5_PRIORITY         12
-#define STM32_SERIAL_USART6_PRIORITY        12
+/**
+ * UART priority should not be too low so that we do not miss bytes
+ */
+#define STM32_SERIAL_USART1_PRIORITY        (PRECISE_SCHEDULING_TIMER_PRIORITY + 2)
+#define STM32_SERIAL_USART2_PRIORITY        (PRECISE_SCHEDULING_TIMER_PRIORITY + 2)
+#define STM32_SERIAL_USART3_PRIORITY        (PRECISE_SCHEDULING_TIMER_PRIORITY + 2)
+#define STM32_SERIAL_UART4_PRIORITY         (PRECISE_SCHEDULING_TIMER_PRIORITY + 2)
+#define STM32_SERIAL_UART5_PRIORITY         (PRECISE_SCHEDULING_TIMER_PRIORITY + 2)
+#define STM32_SERIAL_USART6_PRIORITY        (PRECISE_SCHEDULING_TIMER_PRIORITY + 2)
 
 /*
  * SPI driver system settings.