I need to read and write some jtag registers …
So i think we can do it using the irscan and drscan commands
Into the last revision drscan do not use the var statement …
What is the new right procedure ?
eg: to access idcode
endstate rti
irscan 0 0xe → id code instr
drscan 0 4 0 → exec id code
irscan 0 0xc → intest cmd
drscan 0 32 0 → read idcode and write (nop?)
is this right ?
it do not works … where is my error ?
… especially in chained proc. (but the init is correct and the startup id well checked …)
i need also to write to a scan_n reg. is it possible using irscan and drscan commands ?