diff --git a/snippets/test1/test1.c b/snippets/test1/test1.c
index 0762121..de0fb32 100644
--- a/snippets/test1/test1.c
+++ b/snippets/test1/test1.c
@@ -60,11 +60,8 @@ const uint8_t MDR1_F_BW  = 0b01000000;
 const uint8_t MDR1_F_CY  = 0b10000000;
 
 
-volatile uint32_t ec = 0;
-
-void isr() {
-  ec++;
-}
+volatile uint32_t savedCounter = 0;
+uint32_t lastSavedCounter = 0;
 
 void writeCmd(uint8_t c) {
   uint8_t buf[1];
@@ -94,6 +91,10 @@ uint32_t read32(uint8_t c) {
   return r;
 }
 
+void isr() {
+  savedCounter = read32(CMD_RD | REG_OTR);
+}
+
 void init() {
   wiringPiSetupGpio();
 
@@ -109,6 +110,7 @@ void init() {
 void initCounter() {
   writeCmd(CMD_CLR | REG_STR);
   writeCmd(CMD_CLR | REG_CNTR);
+  writeCmdData(CMD_WR | REG_MDR0, MDR0_ILO);
 }
 
 int main (void) {
@@ -116,10 +118,9 @@ int main (void) {
   initCounter();
 
   while (1) {
-    uint8_t str = read8(CMD_RD | REG_STR);
-    uint32_t cntr = read32(CMD_RD | REG_CNTR);
-
-    printf("%02x %d %d\n", str, ec, cntr);
+    uint32_t diff = savedCounter - lastSavedCounter;
+    lastSavedCounter = savedCounter;
+    printf("%d\n", diff);
 
     sleep(1);
   }