CC2538DK: contiki-ng运行环境下：rpl-border-router可以开启tsch吗

Part Number: CC2538DK

为了使用边界路由器，开启TSCH,我在目录(contiki-ng-develop/examples/rpl-border-router)的Makefile文件中添加代码：MAKE_MAC = MAKE_MAC_TSCH
但是烧录进板子后，边界路由器不能正常运行了，串口打印如下：

contiki-ng-develop/examples/rpl-border-router-1$ sudo make TARGET=cc2538dk connect-router
sudo ../../tools/serial-io/tunslip6 fd00::1/64
********SLIP started on /dev/ttyUSB0'' opened tun device /dev/tun0''
ifconfig tun0 inet hostname mtu 1500 up
ifconfig tun0 add fd00::1/64
ifconfig tun0 add fe80::0:0:0:1/64
ifconfig tun0
tun0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> mtu 1500
inet 127.0.1.1 netmask 255.255.255.255 destination 127.0.1.1
inet6 fe80::b4b9:8473:81c5:2802 prefixlen 64 scopeid 0x20
inet6 fd00::1 prefixlen 64 scopeid 0x0
inet6 fe80::1 prefixlen 64 scopeid 0x20
unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 txqueuelen 500 (UNSPEC)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0