1、bug fix

bike.c

@@ -18,7 +18,27 @@ LV_FONT_DECLARE(lv_font_din_16);
 
 static void battery_timer_cb(lv_timer_t* timer) {
     int8_t battery_percent = lv_battery_indicator_get_percentage(battery_indicator);
-    battery_percent -= 1;
+    battery_percent -= 1;
+    static int accelerating = 0;
+
+    if (speed_meter != NULL) {
+        if (accelerating) {
+
+            lv_speedmeter_set_speed(speed_meter, lv_speedmeter_get_speed(speed_meter) + 1.5f);
+
+            if (lv_speedmeter_get_speed(speed_meter) >= 90.0f) {
+                accelerating = 0;
+            }
+        }
+        else {
+            lv_speedmeter_set_speed(speed_meter, lv_speedmeter_get_speed(speed_meter) - 1.0f);
+
+            if (lv_speedmeter_get_speed(speed_meter) <= 0.0f) {
+                accelerating = 1;
+            }
+        }
+    }
+
     if (battery_percent < 0)
     {
         battery_percent = 100;