diff --git a/test/case52/src/testcase52.c b/test/case52/src/testcase52.c
index 6151011..f0685eb 100755
--- a/test/case52/src/testcase52.c
+++ b/test/case52/src/testcase52.c
@@ -294,6 +294,7 @@ uint32_t rx_callback_data(const char* buf,uint32_t payloadSize)
 
     uint32_t tick_from_tx_ctrl = *(uint32_t *)(buf+4);
 
+    printf("[rx_callback_data]:slot_ind_flag == 1 \n");
     slot_ind_flag = 1;
     gu32_value = value;
     gu32_tick_receive_ctrl = stc_cnt;