diff --git a/Inc/GpioPin.h b/Inc/GpioPin.h
index 821cc07..19f78da 100644
--- a/Inc/GpioPin.h
+++ b/Inc/GpioPin.h
@@ -15,13 +15,19 @@
 #define GPIO_PIN_NOREVERSE false
 #define GPIO_PIN_REVERSE true
 
+typedef enum
+{
+    GPIO_OPEN_DRAIN = 0,
+    GPIO_PUSH_PULL = 1
+} eType_PUSH_PULL_OPEN_DARIN;
+
 tGpioPin vInitGpioPinPull(
         GPIO_InstanceType port,
         uint32_t pinMask,
         GPIO_PinDirectionType direction,
         bool reverse,
         GPIO_PinLevelType ePinLevel,
-        bool bPullEn,
+        eType_PUSH_PULL_OPEN_DARIN bPullEn,
         PORT_PullStatusType ePullSel
 );
 
diff --git a/Src/GpioPin.c b/Src/GpioPin.c
index 7e6baf1..a020b31 100644
--- a/Src/GpioPin.c
+++ b/Src/GpioPin.c
@@ -9,7 +9,7 @@ tGpioPin vInitGpioPinPull(
         GPIO_PinDirectionType direction,
         bool reverse,
         GPIO_PinLevelType ePinLevel,
-        bool bPullEn,
+        eType_PUSH_PULL_OPEN_DARIN bPullEn,
         PORT_PullStatusType ePullSel
 ) {
     PORT_InitType tInitStruct = {0};