Intelligent Systems / mbed-src

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Diff: targets/hal/TARGET_STM/TARGET_STM32F407VG/serial_api.c

Revision:
339:40bd4701f3e2
Parent:
296:ec1b66a3d094
--- a/targets/hal/TARGET_STM/TARGET_STM32F407VG/serial_api.c	Mon Oct 06 11:00:07 2014 +0100
+++ b/targets/hal/TARGET_STM/TARGET_STM32F407VG/serial_api.c	Mon Oct 06 11:45:07 2014 +0100
@@ -104,8 +104,12 @@
     // Configure the UART pins
     pinmap_pinout(tx, PinMap_UART_TX);
     pinmap_pinout(rx, PinMap_UART_RX);
-    pin_mode(tx, PullUp);
-    pin_mode(rx, PullUp);
+    if (tx != NC) {
+        pin_mode(tx, PullUp);
+    }
+    if (rx != NC) {
+        pin_mode(rx, PullUp);
+    }
     
     // Configure UART
     obj->baudrate = 9600;