Star64: jtag debugging?

[bwooster0]

I am using a j-link edu with my star64 board. I am using a macbook pro with my jlink edu. I also connected to the uart pins on the star64.



Here are the pins that need to be connected from the edu to the star64 gpio pins:



JLinkEdu pin    Star64 gpio pin



1               40

3               36

5               38

7               35

9               37

1               2


I couldn't figure out how to use the jlinkexe software to connect to the different cores of the jh7110.



I WAS able to use openocd to connect and see all the cores. I was able to load different programs onto different cores.



I used openocd with the following text in a config file:



>>>>

// config.tcl

adapter driver jlink



reset_config trst_only



transport select jtag



adapter speed 4000



jtag newtap e24 cpu -irlen 5

jtag newtap u74 cpu -irlen 5



#target create e24.cpu0 riscv -chain-position e24.cpu -coreid 0

target create u74.cpu0 riscv -chain-position u74.cpu -coreid 0 -rtos hwthread

target create u74.cpu1 riscv -chain-position u74.cpu -coreid 1

target create u74.cpu2 riscv -chain-position u74.cpu -coreid 2

target create u74.cpu3 riscv -chain-position u74.cpu -coreid 3

target create u74.cpu4 riscv -chain-position u74.cpu -coreid 4

#target smp u74.cpu0 u74.cpu1 u74.cpu2 u74.cpu3 u74.cpu4



init
>>>>



There isn't much general documentation for the JH7110. I did write a simple assembly program that wrote to the serial board.

I was able load the program onto the board using openocd. It was fun seeing 4 cores all writing to the serial port at the same time!