many improvement

Core/App/Graphic/ui.h

@@ -11,6 +11,8 @@ void ui_com_freq_digital(uint8_t clear, uint8_t only_pointer);
 void ui_com_fm_am(uint8_t clear);
 void ui_com_vol_bar(uint8_t clear);
 void ui_com_sig_bar(uint8_t clear);
+/* 图标 */
+void icon_stereo();
 /* 绘制主界面 */
 void ui_screen_main();
 void ui_screen_main_animation();