diff --git a/bsl/csl/interfaces/usart.h b/bsl/csl/interfaces/usart.h
new file mode 100644
index 0000000..a10a08e
--- /dev/null
+++ b/bsl/csl/interfaces/usart.h
@@ -0,0 +1,16 @@
+#ifndef _USART_H_
+#define _USART_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+void usartTxInit(); 
+void usartRxInit(); 
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //  _USART_H_
diff --git a/bsl/csl/stm32f042/Src/pin.c b/bsl/csl/stm32f042/Src/pin.c
index 022b970..189a389 100644
--- a/bsl/csl/stm32f042/Src/pin.c
+++ b/bsl/csl/stm32f042/Src/pin.c
@@ -80,11 +80,11 @@ void pinSetSpeed(pinNo_t pinNo, speed speed)
  
 void pinConfig(pinNo_t pinNo, mode mode, state state, pullUpDown resistance, speed speed)
 {
+	pinInit(pinNo);	
 	pinSetMode(pinNo, mode); 	
 	pinSetOutputState(pinNo, state); 
 	pinSetPullUpDonw(pinNo, resistance);
 	pinSetSpeed(pinNo,speed); 
-	pinInit(pinNo);	
 }
 
 uint8_t pinRead(pinNo_t pinNo)