gadgetfs_phy.py 文件源码

def _open_endpoint_fd(self, ep):
        '''
        :param ep: USBEndpoint object

        :raises Exception: if no endpoint file found, or failed to open

        .. todo:: detect transfer-type specific endpoint files
        '''
        num = ep.number
        s_dir = 'out' if ep.direction == USBEndpoint.direction_out else 'in'
        filename = 'ep%d%s' % (num, s_dir)
        path = os.path.join(self.gadgetfs_dir, filename)
        fd = os.open(path, os.O_RDWR | os.O_NONBLOCK)
        self.debug('Opened endpoint %d' % (num))
        self.debug('ep: %d dir: %s file: %s fd: %d' % (num, s_dir, filename, fd))
        ep.fd = fd