Hi Tim, Thanks for the quick response!
But I couldn't find any code about `set_bscan_tunnel_ir` (I think `irscv set_bscan_tunner_ir <value>` you mentioned is probably wrong, should be `riscv set_bscan_tunnel_ir`, right?) I checked the master branch of openocd GitHub and SourceForge repo. Is it in another repository? please elaborate a bit. Thanks! BR, Peng Tim Newsome <t...@sifive.com> 于2022年10月12日周三 18:01写道： > You can set the value you need for your hardware using `irscv > set_bscan_tunner_ir <value>`. The code you pointed at is the default value. > > Tim > > On Wed, Oct 12, 2022 at 3:15 AM peng cheng <thomas.pch...@gmail.com> > wrote: > >> Registered in the mail list and repost this bug report again. >> >> peng cheng <thomas.pch...@gmail.com> 于2022年10月12日周三 12:08写道： >> >>> Hi all, >>> >>> Hope everyone had a nice day! >>> >>> Don't know whether this is the correct place, but please forward it if I >>> am wrong. >>> >>> Found this tricky issue when using the RISC-V user4 JTAG tunnel on the >>> VCU128 FPGA Xilinx board. >>> >>> The user4 IR is totally wrongly set in this bit of codes >>> >>> >>> https://github.com/openocd-org/openocd/blob/master/src/target/riscv/riscv.c#L455 >>> >>> uint32_t ir_user4_raw = 0x23 << (target->tap->ir_length - 6); >>> >>> The correct one is 0x23924 for VCU128, and below is my temporary change >>> to fix this. >>> >>> - uint32_t ir_user4_raw = 0x23 << (target->tap->ir_length >>> - 6); >>> + //uint32_t ir_user4_raw = 0x23 << (target->tap->ir_length - >>> 6); >>> + uint32_t ir_user4_raw = 0x23924; >>> + printf("ir user4 change to 0x23924\n"); >>> >>> IMO, the correct user4 IR should be set on the command line, something >>> like ``--set-user4-ir`. >>> Please let me know if I am correct and maybe discuss how to fix it. >>> >>> Thanks! >>> >>> BR, >>> Peng >>> >>
