fix: 优化射箭拍照慢问题

main.py

@@ -278,8 +278,6 @@ def cmd_str():
         logger.info("系统准备完成...")
 
     last_adc_trigger = 0
-    _latest_frame = None  # 预读的最新帧缓存，供射箭触发时减少延迟
-    _frame_read_counter = 0  # 相机预读计数器，避免每帧都读拖慢CPU
     # 气压采样：减少日志频率（每 N 个点输出一条），避免 logger.debug 拖慢采样
     PRESSURE_BATCH_SIZE = 100
 
@@ -391,8 +389,7 @@ def cmd_str():
                 _flush_pressure_buf("before_trigger")
 
                 try:
-                    process_shot(adc_val, pre_frame=_latest_frame)
-                    _latest_frame = None
+                    process_shot(adc_val)
                 except Exception as e:
                     logger = logger_manager.logger
                     if logger:
@@ -402,18 +399,11 @@ def cmd_str():
                     time.sleep_ms(100)
                     continue
             else:
-                # 每3次循环预读一次相机帧（~15ms间隔），平衡buffer新鲜度与CPU占用
-                _frame_read_counter += 1
-                if _frame_read_counter >= 3:
-                    _frame_read_counter = 0
+                if config.SHOW_CAMERA_PHOTO_WHILE_SHOOTING:
                     try:
-                        _latest_frame = camera_manager.read_frame()
-                        if config.SHOW_CAMERA_PHOTO_WHILE_SHOOTING and _latest_frame is not None:
-                            camera_manager.show(_latest_frame)
+                        camera_manager.show(camera_manager.read_frame())
                     except Exception as e:
-                        logger = logger_manager.logger
-                        if logger:
-                            logger.error(f"[MAIN] 预读/显示异常: {e}")
+                        pass
                 time.sleep_ms(5)
 
         except Exception as e: