USBVC_BUF_MAPPED
buf->status = USBVC_BUF_MAPPED;
if (usbvc_buf->status >= USBVC_BUF_MAPPED) {
if (usbvc_buf->status < USBVC_BUF_MAPPED) {
if (usbvc_buf->status == USBVC_BUF_MAPPED) {