diff --git a/snippets/test1/test1.c b/snippets/test1/test1.c
index 1f29f2a..bc69491 100644
--- a/snippets/test1/test1.c
+++ b/snippets/test1/test1.c
@@ -60,8 +60,10 @@ const uint8_t MDR1_F_BW  = 0b01000000;
 const uint8_t MDR1_F_CY  = 0b10000000;
 
 
-volatile uint32_t ec = 0;
-volatile uint32_t diff = 0;
+uint32_t ec = 0;
+uint32_t counter = 0;
+uint32_t diff = 0;
+
 
 pthread_mutex_t eventMutex = PTHREAD_MUTEX_INITIALIZER;
 pthread_cond_t eventSignal = PTHREAD_COND_INITIALIZER;
@@ -100,6 +102,7 @@ void isr() {
   uint32_t currentCounter = read32(CMD_RD | REG_OTR);
 
   diff = currentCounter - lastCounter;
+  counter = currentCounter;
   lastCounter = currentCounter;
 
   ec++;
@@ -136,6 +139,8 @@ int main (void) {
     pthread_cond_wait(&eventSignal, &eventMutex);
     pthread_mutex_unlock(&eventMutex);
 
-    printf("%d %d\n", ec, diff);
+    double f = 1.0 / (((double) diff) / 1000.0);
+
+    printf("%d %d %d %f\n", ec, counter, diff, f);
   }
 }