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 >> >
