GPIO_VSYNC_CURRENT  111 core/usb_sync.c         int cur_cnt = *(volatile int*)(GPIO_VSYNC_CURRENT) & 0xffff; // get the counter state at the time of sync
GPIO_VSYNC_CURRENT  118 core/usb_sync.c             while ((*(volatile int*)(GPIO_VSYNC_CURRENT) & 0xffff) >= cur_cnt) {};