diff --git a/Inc/PwmIO.h b/Inc/PwmIO.h
index fc2d28c..5ab6d3e 100644
--- a/Inc/PwmIO.h
+++ b/Inc/PwmIO.h
@@ -16,5 +16,11 @@ typedef struct {
     PwmIOTransactionSetActivePercent setActivePercent;
 } tPwmIO;
 
+typedef uint8_t (*PwmIOCaptureTransaction  )(void *env);
+
+typedef struct {
+    void *env;
+    PwmIOCaptureTransaction getPwm;
+} tPwmCaptureIO;
 
 #endif //MODULE_PWMIO_H