diff --git a/bsl/csl/stm32f042/Src/pin.c b/bsl/csl/stm32f042/Src/pin.c
index c1f99e7..61460a1 100644
--- a/bsl/csl/stm32f042/Src/pin.c
+++ b/bsl/csl/stm32f042/Src/pin.c
@@ -42,6 +42,13 @@ const uint32_t speedList[4] = {
 	3
 };
 
+const uint32_t outputStateList[3] = 
+{
+	1,
+	0,
+	1
+};
+
 void setMode(pinNo_t pinNo, mode mode)
 {
 	init(pinNo);
@@ -53,7 +60,8 @@ void setMode(pinNo_t pinNo, mode mode)
 
 void setOutputState(pinNo_t pinNo, state state)
 {
-	
+	PIN_BASE->OSPEEDR &= 1 << (pinNo & 0x0F);	
+	PIN_BASE->OSPEEDR |= (outputStateList[state] << (pinNo & 0x0F));
 }
  
 void setPullUpDonw(pinNo_t pinNo, pullUpDown resistance)