Fix F4 BSP without UART_DEV.

1 files changed, 3 insertions, 1 deletions

diff --git a/hw/bsp/stm32f4/family.c b/hw/bsp/stm32f4/family.c
index 3a1507dbf..260927903 100644
--- a/hw/bsp/stm32f4/family.c
+++ b/hw/bsp/stm32f4/family.c
@@ -53,6 +53,7 @@ void OTG_HS_IRQHandler(void) {
 //--------------------------------------------------------------------+
 // MACRO TYPEDEF CONSTANT ENUM
 //--------------------------------------------------------------------+
+#ifdef UART_DEV
 UART_HandleTypeDef UartHandle = {
     .Instance = UART_DEV,
     .Init = {
@@ -65,6 +66,7 @@ UART_HandleTypeDef UartHandle = {
       .OverSampling = UART_OVERSAMPLING_16
     }
 };
+#endif
 
 void board_init(void) {
   board_clock_init();
@@ -233,7 +235,7 @@ int board_uart_write(void const *buf, int len) {
   HAL_UART_Transmit(&UartHandle, (uint8_t *) (uintptr_t) buf, len, 0xffff);
   return len;
 #else
-  (void) buf; (void) len; (void) UartHandle;
+  (void) buf; (void) len;
   return 0;
 #endif
 }