工程中添加好 jtag to avalon master bridge 模块，并下载到板子上后，打开 tool -- system debugging tools -- system console ,如下图：
如果左侧没有 devices 卡，则 load design (sof) 后，关闭console然后重新打开，并 refresh connections
然后参考 ： https://blog.csdn.net/stu_ding/article/details/49274675
即
1 打开master
A 语法：set <service-path> [lindex[get_service_paths master] 0] //重命名master
举例：set jd_path [lindex [get_service_paths master ] 0]
B 语法：open_service master <service-path> //open master
举例：open_service master$jd_path
2 读写avalon地址数据
master_write_8 / master_write_16 / master_write_32
master_read_8 / master_read_16 / master_read_32
语法：master_write_32 <service-path><address> <list_of_32_bit_words>
举例：master_write_32 $jd_path 0x0000 0x12345678
语法：master_read_32 <service-path><address> <size_in_multiples_of_32_bits>
举例：master_write_32 $jd_path 0x0000 0x12345678