Print TDO on JTAG Chain Debugger

Altera_Forum · ‎12-15-2017

Hello,

I have a JTAG chain of 3 devices; I used JTAG Chain Debugger to go through the JTAG chain step-by-step.

In the example that I attached, I sent an IR instruction to bypass the first 2 devices, and select the ID register of Device 3 (UNKNOWN_1000143). Then, I shift the data registers and I get the correct ID (1000143) for device 3.

What I want to do is use a .svf to automate the previous commands; I saved the session log and I get the following content for the .svf:

ENDIR IDLE;
ENDDR IDLE;
SIR 18 TDI (3FFF1); !TDO (15511)
SDR 34 TDI (000000000); !TDO (001000143)

I also tried to move the semicolon and remove the "!" which I guess is for comments, but I have the same result: "Success to execute file...".

ENDIR IDLE;
ENDDR IDLE;
SIR 18 TDI (3FFF1) TDO (15511);
SDR 34 TDI (000000000) TDO (001000143);

I even tried to play with MASK and SMASK (I am still confused with their differences).

Is it possible to print the value of TDO with JTAG Chain Debugger; or is it something the tool does internally during step-by-step operations?

Thanks,

Damien