TUSB_DEV_CONF_SOFT_ID
dev_conf &= ~TUSB_DEV_CONF_SOFT_ID;
dev_conf |= (TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
dev_conf &= ~(TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);