diff --git a/usrc/project_configs.h b/usrc/project_configs.h
index 1a3c5e6..502c86e 100644
--- a/usrc/project_configs.h
+++ b/usrc/project_configs.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #define VERSION(main, sub, fix) (main << 16 | sub << 8 | fix << 0)
-#define PC_VERSION              VERSION(3, 3, 3)
+#define PC_VERSION              VERSION(3, 3, 4)
 
 #define PC_MANUFACTURER0     ('i' | 'f' << 8 | 'l' << 16 | 'y' << 24)
 #define PC_MANUFACTURER1     ('t' | 'o' << 8 | 'p' << 16 | '\0' << 24)
diff --git a/usrc/service/report_generator_service.c b/usrc/service/report_generator_service.c
index 67cb724..a5b89c9 100644
--- a/usrc/service/report_generator_service.c
+++ b/usrc/service/report_generator_service.c
@@ -20,6 +20,7 @@ static uint32_t m_xsync_workstate_start_sig_irq_pin_off;
 static uint32_t m_timecode_trigger_input_off;
 static uint32_t m_xync_trigger_input_off;
 static uint32_t m_xyns_camera_sync_packet_last_report_tp;
+static bool     m_first_frame = true;
 #define TAG "timecode"
 /**
  * @brief 构建并发送时间码数据包
@@ -160,8 +161,9 @@ static void xync_signal_report_thread(void const *argument) {
       create_and_send_timecode(tc0, tc1, cnt);  // timecode广播包
       last_report_packet_time = xs_get_ticket();
 
-        second = daycnt * 24 * 3600 + result.timeinall;
-      if (dtime >= 1|| second == 0) {
+      if (dtime >= 1 || m_first_frame) {
+        m_first_frame = false;
+        second        = daycnt * 24 * 3600 + result.timeinall;
         create_and_send_camera_sync_msg(second);
       }
     }