according to the documentation, to access to jtag I need:
Power on and reset the Hi3660.
Set JTAG_SEL1 and JTAG_SEL0 to 2'b01 to multiplex the CPU JTAG function on the JTAG pin.
Set JTAG_SEL1 and JTAG_SEL0 to 2'b00 to enter the register selection mode. Configure the
system control register JTAGSYS_SW_SEL [7:0] to switch to the selected debugging
interface for debugging.
Connect the corresponding simulator and open the corresponding debugging software to start
I have soldered the JTAG connector. I verified my cable and soldering are ok. I have used two different jtag probes but they cannot find the target.
I have localized JTAG_SEL0 and JTAG_SEL1 (TP902 and 903 on the board following the schematics), but how can I configure the system control register JTAGSYS_SW_SEL please? No information about that into the doc.
Please any detail shoulb be nice here.