DOWNLOAD_FIRMWARE
struct req_t req = {DOWNLOAD_FIRMWARE, 0, 0, 0, 0, 0, NULL};
case DOWNLOAD_FIRMWARE:
if (req->cmd == DOWNLOAD_FIRMWARE || req->cmd == RECONNECT_USB)
struct ec168_req req = {DOWNLOAD_FIRMWARE, 0, 0, 0, NULL};
case DOWNLOAD_FIRMWARE: