移植n101软核到非官方指定的FPGA板卡中（XC7A100TFGG676-1),蜂鸟调试器连接JTAG接口（二线JTAG调试），在使用openocd连接JTAG时，发现有报错，如下所示：
D:\OpenOCD\bin>openocd -f openocd_hbird.cfg
Open On-Chip Debugger 0.11.0 (2021-11-18) [https://github.com/sysprogs/openocd]
Licensed under GNU GPL v2
libusb1 09e75e98b4d9ea7909e8837b7a3f00dda4589dc3
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
DEPRECATED! use ‘adapter speed’ not ‘adapter_khz’
DEPRECATED! use ‘adapter driver’ not ‘interface’
DEPRECATED! use ‘ftdi vid_pid’ not ‘ftdi_vid_pid’
DEPRECATED! use ‘ftdi layout_init’ not ‘ftdi_layout_init’
DEPRECATED! use ‘ftdi layout_signal’ not ‘ftdi_layout_signal’
DEPRECATED! use ‘ftdi layout_signal’ not ‘ftdi_layout_signal’
DEPRECATED! use ‘ftdi layout_signal’ not ‘ftdi_layout_signal’
DEPRECATED! use ‘ftdi layout_signal’ not ‘ftdi_layout_signal’
DEPRECATED! use ‘ftdi layout_signal’ not ‘ftdi_layout_signal’
DEPRECATED! use ‘ftdi layout_signal’ not ‘ftdi_layout_signal’
Info : auto-selecting first available session transport “jtag”. To override use ‘transport select
Info : clock speed 1000 kHz
Error: JTAG scan chain interrogation failed: all ones
Error: Check JTAG interface, timings, target power, etc.
Error: Trying to use configured scan chain anyway…
Error: riscv.cpu: IR capture error; saw 0x1f not 0x01
Warn : Bypassing JTAG setup events due to errors
Error: Unsupported DTM version: 15
Warn : target riscv.cpu examination failed
Info : starting gdb server for riscv.cpu on 3333
Info : Listening on port 3333 for gdb connections
Error: Target not examined yet
Error: Unsupported DTM version: 15
接口连线正确，有人遇到过这种情况吗？应该怎么解决？多谢！！！！
还是报错，但是和前几次的不一样，如下：
Open On-Chip Debugger 0.11.0+dev-01889-geee887d60 (2022-01-13-23:33)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
DEPRECATED! use 'adapter speed' not 'adapter_khz'
DEPRECATED! use 'adapter driver' not 'interface'
Info : auto-selecting first available session transport "jtag". To override use 'transport select <transport>'.
Info : Using libusb driver
Info : clock speed 1000 kHz
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Info : JTAG tap: riscv.cpu tap/device found: 0x82000211 (mfg: 0x108 (Ardent Technologies), part: 0x2000, ver: 0x8)
Info : TAP auto0.tap does not have valid IDCODE (idcode=0x2494aa94)
Info : TAP auto1.tap does not have valid IDCODE (idcode=0x924a554a)
Info : JTAG tap: auto2.tap tap/device found: 0x49252aa5 (mfg: 0x552 (NOR-MEM), part: 0x9252, ver: 0x4)
Info : TAP auto3.tap does not have valid IDCODE (idcode=0x25249124)
Info : TAP auto4.tap does not have valid IDCODE (idcode=0x92924892)
Info : JTAG tap: auto5.tap tap/device found: 0x49492449 (mfg: 0x224 (Raza Microelectronics), part: 0x9492, ver: 0x4)
Info : TAP auto6.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto7.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto8.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto9.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto10.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto11.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto12.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto13.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto14.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto15.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto16.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto17.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto18.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto19.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Warn : Unexpected idcode after end of chain: 331 0x92492492
Warn : Unexpected idcode after end of chain: 363 0x24924924
Warn : Unexpected idcode after end of chain: 395 0x49249249
Warn : Unexpected idcode after end of chain: 427 0x92492492
Warn : Unexpected idcode after end of chain: 459 0x24924924
Warn : Unexpected idcode after end of chain: 491 0x49249249
Warn : Unexpected idcode after end of chain: 523 0x92492492
Warn : Unexpected idcode after end of chain: 555 0x24924924
Warn : Unexpected idcode after end of chain: 587 0x49249249
Warn : Unexpected idcode after end of chain: 619 0x92492492
Error: double-check your JTAG setup (interface, speed, ...)
Error: Trying to use configured scan chain anyway...
Warn : AUTO auto0.tap - use "jtag newtap auto0 tap -irlen 2 -expected-id 0x00000000"
Error: auto0.tap: IR capture error; saw 0x0000 not 0x0001
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Warn : Bypassing JTAG setup events due to errors
Error: dtmcontrol is 0. Check JTAG connectivity/board power.
Warn : target riscv.cpu examination failed
Info : starting gdb server for riscv.cpu on 3333
Info : Listening on port 3333 for gdb connections
Error: Target not examined yet
您好，请问这个问题解决了吗，是怎么解决的。
“assign jtag_TMS=jtag_DRV_TMS?jtag_TMS_out:1'bz;
assign jtag_TMS_in=jtag_TMS;”
这个地方TMS信号的处理，参考原N101的工程来改一下吧，用IOBUF来处理，在约束里面带上KEEP属性。
又报这样的错了：
Open On-Chip Debugger 0.11.0+dev-01889-geee887d60 (2022-01-13-23:33)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
DEPRECATED! use 'adapter speed' not 'adapter_khz'
DEPRECATED! use 'adapter driver' not 'interface'
Info : auto-selecting first available session transport "jtag". To override use 'transport select <transport>'.
Info : Using libusb driver
Info : clock speed 1000 kHz
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Error: JTAG scan chain interrogation failed: all ones
Error: Check JTAG interface, timings, target power, etc.
Error: Trying to use configured scan chain anyway...
Error: riscv.cpu: IR capture error; saw 0x1f not 0x01
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Warn : Bypassing JTAG setup events due to errors
Error: Unsupported DTM version: 15
Warn : target riscv.cpu examination failed
Info : starting gdb server for riscv.cpu on 3333
Info : Listening on port 3333 for gdb connections
Error: Target not examined yet
Error: Unsupported DTM version: 15
“assign jtag_TMS=jtag_DRV_TMS?jtag_TMS_out:1'bz;
assign jtag_TMS_in=jtag_TMS;”
这个地方TMS信号的处理，参考原N101的工程来改一下吧，用IOBUF来处理，在约束里面带上KEEP属性。
还是报错，但是和前几次的不一样，如下：
Open On-Chip Debugger 0.11.0+dev-01889-geee887d60 (2022-01-13-23:33)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
DEPRECATED! use 'adapter speed' not 'adapter_khz'
DEPRECATED! use 'adapter driver' not 'interface'
Info : auto-selecting first available session transport "jtag". To override use 'transport select <transport>'.
Info : Using libusb driver
Info : clock speed 1000 kHz
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Info : JTAG tap: riscv.cpu tap/device found: 0x82000211 (mfg: 0x108 (Ardent Technologies), part: 0x2000, ver: 0x8)
Info : TAP auto0.tap does not have valid IDCODE (idcode=0x2494aa94)
Info : TAP auto1.tap does not have valid IDCODE (idcode=0x924a554a)
Info : JTAG tap: auto2.tap tap/device found: 0x49252aa5 (mfg: 0x552 (NOR-MEM), part: 0x9252, ver: 0x4)
Info : TAP auto3.tap does not have valid IDCODE (idcode=0x25249124)
Info : TAP auto4.tap does not have valid IDCODE (idcode=0x92924892)
Info : JTAG tap: auto5.tap tap/device found: 0x49492449 (mfg: 0x224 (Raza Microelectronics), part: 0x9492, ver: 0x4)
Info : TAP auto6.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto7.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto8.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto9.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto10.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto11.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto12.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto13.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto14.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto15.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto16.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto17.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto18.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto19.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Warn : Unexpected idcode after end of chain: 331 0x92492492
Warn : Unexpected idcode after end of chain: 363 0x24924924
Warn : Unexpected idcode after end of chain: 395 0x49249249
Warn : Unexpected idcode after end of chain: 427 0x92492492
Warn : Unexpected idcode after end of chain: 459 0x24924924
Warn : Unexpected idcode after end of chain: 491 0x49249249
Warn : Unexpected idcode after end of chain: 523 0x92492492
Warn : Unexpected idcode after end of chain: 555 0x24924924
Warn : Unexpected idcode after end of chain: 587 0x49249249
Warn : Unexpected idcode after end of chain: 619 0x92492492
Error: double-check your JTAG setup (interface, speed, ...)
Error: Trying to use configured scan chain anyway...
Warn : AUTO auto0.tap - use "jtag newtap auto0 tap -irlen 2 -expected-id 0x00000000"
Error: auto0.tap: IR capture error; saw 0x0000 not 0x0001
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Warn : Bypassing JTAG setup events due to errors
Error: dtmcontrol is 0. Check JTAG connectivity/board power.
Warn : target riscv.cpu examination failed
Info : starting gdb server for riscv.cpu on 3333
Info : Listening on port 3333 for gdb connections
Error: Target not examined yet
cfg配置文件如下：
adapter_khz 1000
interface ftdi
#ftdi_device_desc "USB <-> JTAG-DEBUGGER"
ftdi_vid_pid 0x0403 0x6010
ftdi_oscan1_mode on
ftdi_layout_init 0x0008 0x001b
ftdi_layout_signal nSRST -oe 0x0020 -data 0x0020
ftdi_layout_signal TCK -data 0x0001
ftdi_layout_signal TDI -data 0x0002
ftdi_layout_signal TDO -input 0x0004
ftdi_layout_signal TMS -data 0x0008
ftdi_layout_signal JTAG_SEL -data 0x0100 -oe 0x0100
#Reset Stretcher logic on FE310 is ~1 second long
#This doesn't apply if you use
# ftdi_set_signal, but still good to document
#adapter_nsrst_delay 1500
set _CHIPNAME riscv
jtag newtap $_CHIPNAME cpu -irlen 5
set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME riscv -chain-position $_TARGETNAME
$_TARGETNAME configure -work-area-phys 0x80000 -work-area-size 10000 -work-area-backup 1
init
#reset
if {[ info exists pulse_srst]} {
ftdi_set_signal nSRST 0
ftdi_set_signal nSRST z
}
halt
约束里面加上这个吧
set_property KEEPER true [get_ports jtag_TMS]
还是报错，但是和前几次的不一样，如下：
Open On-Chip Debugger 0.11.0+dev-01889-geee887d60 (2022-01-13-23:33)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
DEPRECATED! use 'adapter speed' not 'adapter_khz'
DEPRECATED! use 'adapter driver' not 'interface'
Info : auto-selecting first available session transport "jtag". To override use 'transport select <transport>'.
Info : Using libusb driver
Info : clock speed 1000 kHz
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Info : JTAG tap: riscv.cpu tap/device found: 0x82000211 (mfg: 0x108 (Ardent Technologies), part: 0x2000, ver: 0x8)
Info : TAP auto0.tap does not have valid IDCODE (idcode=0x2494aa94)
Info : TAP auto1.tap does not have valid IDCODE (idcode=0x924a554a)
Info : JTAG tap: auto2.tap tap/device found: 0x49252aa5 (mfg: 0x552 (NOR-MEM), part: 0x9252, ver: 0x4)
Info : TAP auto3.tap does not have valid IDCODE (idcode=0x25249124)
Info : TAP auto4.tap does not have valid IDCODE (idcode=0x92924892)
Info : JTAG tap: auto5.tap tap/device found: 0x49492449 (mfg: 0x224 (Raza Microelectronics), part: 0x9492, ver: 0x4)
Info : TAP auto6.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto7.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto8.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto9.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto10.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto11.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto12.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto13.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto14.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto15.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto16.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto17.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Info : TAP auto18.tap does not have valid IDCODE (idcode=0x92492492)
Info : JTAG tap: auto19.tap tap/device found: 0x49249249 (mfg: 0x124 (Peregrine Semiconductor), part: 0x9249, ver: 0x4)
Warn : Unexpected idcode after end of chain: 331 0x92492492
Warn : Unexpected idcode after end of chain: 363 0x24924924
Warn : Unexpected idcode after end of chain: 395 0x49249249
Warn : Unexpected idcode after end of chain: 427 0x92492492
Warn : Unexpected idcode after end of chain: 459 0x24924924
Warn : Unexpected idcode after end of chain: 491 0x49249249
Warn : Unexpected idcode after end of chain: 523 0x92492492
Warn : Unexpected idcode after end of chain: 555 0x24924924
Warn : Unexpected idcode after end of chain: 587 0x49249249
Warn : Unexpected idcode after end of chain: 619 0x92492492
Error: double-check your JTAG setup (interface, speed, ...)
Error: Trying to use configured scan chain anyway...
Warn : AUTO auto0.tap - use "jtag newtap auto0 tap -irlen 2 -expected-id 0x00000000"
Error: auto0.tap: IR capture error; saw 0x0000 not 0x0001
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Warn : Bypassing JTAG setup events due to errors
Error: dtmcontrol is 0. Check JTAG connectivity/board power.
Warn : target riscv.cpu examination failed
Info : starting gdb server for riscv.cpu on 3333
Info : Listening on port 3333 for gdb connections
Error: Target not examined yet
约束：
# 时钟引脚
set_property IOSTANDARD LVCMOS33 [get_ports clk50mhz]
set_property PACKAGE_PIN U22 [get_ports clk50mhz]
# 复位引脚
set_property IOSTANDARD LVCMOS33 [get_ports rst_n]
set_property PACKAGE_PIN AC26 [get_ports rst_n]
set_property IOSTANDARD LVCMOS33 [get_ports jtag_rst]
set_property PACKAGE_PIN P4 [get_ports jtag_rst]
# JTAG TCK引脚
set_property IOSTANDARD LVCMOS33 [get_ports jtag_TCK]
set_property PACKAGE_PIN E26 [get_ports jtag_TCK]
set_property CLOCK_DEDICATED_ROUTE FALSE [get_nets jtag_TCK]
# JTAG TMS引脚
set_property IOSTANDARD LVCMOS33 [get_ports jtag_TMS]
set_property PACKAGE_PIN E25 [get_ports jtag_TMS]
#串口tx
set_property IOSTANDARD LVCMOS33 [get_ports tx_evt]
set_property PACKAGE_PIN G22 [get_ports tx_evt]
#串口rx
set_property IOSTANDARD LVCMOS33 [get_ports rx_evt]
set_property PACKAGE_PIN J25 [get_ports rx_evt]
顶层TOP：
module n101_core_100T_top(
input jtag_TCK,
inout jtag_TMS,
//input jtag_TDI,
output jtag_dwen,
output tx_evt,
input rx_evt,
//input i_dbg_stop,
input jtag_rst,
input clk50mhz,
input rst_n
);
//wire jtag_TDI_IN;
wire jtag_TMS_out;
wire jtag_DRV_TMS;
wire jtag_TMS_in;
//assign jtag_TDI_IN=jtag_TDI;
assign jtag_TMS=jtag_DRV_TMS?jtag_TMS_out:1'bz;
assign jtag_TMS_in=jtag_TMS;
n101_core_wrapper n101_core_wrapper(
.jtag_TCK(jtag_TCK),
.jtag_TMS_in(jtag_TMS_in),
.jtag_TDI(),
.jtag_TDO(),
.jtag_DRV_TDO(),
.jtag_dwen(jtag_dwen),
.jtag_TMS_out(jtag_TMS_out),
.jtag_DRV_TMS(jtag_DRV_TMS),
.jtag_BK_TMS(),
.hart_halted(),
.i_dbg_stop(1'b0),
.sysrstreq(),
.core_clk_aon(clk50mhz),
.core_clk(clk50mhz),
.core_reset_n(rst_n),
.por_reset_n(jtag_rst),
.reset_bypass(1'b0),
.clkgate_bypass(1'b1),
.mtime_toggle_a(1'b1),
.dbg_toggle_a(1'b1),
.clic_irq(2'b00),
.htrans(),
.hwrite(),
.hsize(),
.hburst(),
.hmastlock(),
.hwdata(),
.hprot(),
.master(),
.hrdata(32'd0),
.hresp(2'b00),
.hready(1'b1),
.tx_evt(tx_evt),
.rx_evt(rx_evt),
.core_wfi_mode(),
.hart_id(32'h0),
.reset_vector(20'd0),
.core_sleep_value()
);
endmodule
约束里面加上这个吧
set_property KEEPER true [get_ports jtag_TMS]
约束：
# 时钟引脚
set_property IOSTANDARD LVCMOS33 [get_ports clk50mhz]
set_property PACKAGE_PIN U22 [get_ports clk50mhz]
# 复位引脚
set_property IOSTANDARD LVCMOS33 [get_ports rst_n]
set_property PACKAGE_PIN AC26 [get_ports rst_n]
set_property IOSTANDARD LVCMOS33 [get_ports jtag_rst]
set_property PACKAGE_PIN P4 [get_ports jtag_rst]
# JTAG TCK引脚
set_property IOSTANDARD LVCMOS33 [get_ports jtag_TCK]
set_property PACKAGE_PIN E26 [get_ports jtag_TCK]
set_property CLOCK_DEDICATED_ROUTE FALSE [get_nets jtag_TCK]
# JTAG TMS引脚
set_property IOSTANDARD LVCMOS33 [get_ports jtag_TMS]
set_property PACKAGE_PIN E25 [get_ports jtag_TMS]
#串口tx
set_property IOSTANDARD LVCMOS33 [get_ports tx_evt]
set_property PACKAGE_PIN G22 [get_ports tx_evt]
#串口rx
set_property IOSTANDARD LVCMOS33 [get_ports rx_evt]
set_property PACKAGE_PIN J25 [get_ports rx_evt]
顶层TOP：
module n101_core_100T_top(
input jtag_TCK,
inout jtag_TMS,
//input jtag_TDI,
output jtag_dwen,
output tx_evt,
input rx_evt,
//input i_dbg_stop,
input jtag_rst,
input clk50mhz,
input rst_n
);
//wire jtag_TDI_IN;
wire jtag_TMS_out;
wire jtag_DRV_TMS;
wire jtag_TMS_in;
//assign jtag_TDI_IN=jtag_TDI;
assign jtag_TMS=jtag_DRV_TMS?jtag_TMS_out:1'bz;
assign jtag_TMS_in=jtag_TMS;
n101_core_wrapper n101_core_wrapper(
.jtag_TCK(jtag_TCK),
.jtag_TMS_in(jtag_TMS_in),
.jtag_TDI(),
.jtag_TDO(),
.jtag_DRV_TDO(),
.jtag_dwen(jtag_dwen),
.jtag_TMS_out(jtag_TMS_out),
.jtag_DRV_TMS(jtag_DRV_TMS),
.jtag_BK_TMS(),
.hart_halted(),
.i_dbg_stop(1'b0),
.sysrstreq(),
.core_clk_aon(clk50mhz),
.core_clk(clk50mhz),
.core_reset_n(rst_n),
.por_reset_n(jtag_rst),
.reset_bypass(1'b0),
.clkgate_bypass(1'b1),
.mtime_toggle_a(1'b1),
.dbg_toggle_a(1'b1),
.clic_irq(2'b00),
.htrans(),
.hwrite(),
.hsize(),
.hburst(),
.hmastlock(),
.hwdata(),
.hprot(),
.master(),
.hrdata(32'd0),
.hresp(2'b00),
.hready(1'b1),
.tx_evt(tx_evt),
.rx_evt(rx_evt),
.core_wfi_mode(),
.hart_id(32'h0),
.reset_vector(20'd0),
.core_sleep_value()
);
endmodule
jtag_rst直接约束位FPGA板上的复位按键，蜂鸟调试器上的rst管脚是悬空的
JTAG的约束也发出来看看吧
约束：
# 时钟引脚
set_property IOSTANDARD LVCMOS33 [get_ports clk50mhz]
set_property PACKAGE_PIN U22 [get_ports clk50mhz]
# 复位引脚
set_property IOSTANDARD LVCMOS33 [get_ports rst_n]
set_property PACKAGE_PIN AC26 [get_ports rst_n]
set_property IOSTANDARD LVCMOS33 [get_ports jtag_rst]
set_property PACKAGE_PIN P4 [get_ports jtag_rst]
# JTAG TCK引脚
set_property IOSTANDARD LVCMOS33 [get_ports jtag_TCK]
set_property PACKAGE_PIN E26 [get_ports jtag_TCK]
set_property CLOCK_DEDICATED_ROUTE FALSE [get_nets jtag_TCK]
# JTAG TMS引脚
set_property IOSTANDARD LVCMOS33 [get_ports jtag_TMS]
set_property PACKAGE_PIN E25 [get_ports jtag_TMS]
#串口tx
set_property IOSTANDARD LVCMOS33 [get_ports tx_evt]
set_property PACKAGE_PIN G22 [get_ports tx_evt]
#串口rx
set_property IOSTANDARD LVCMOS33 [get_ports rx_evt]
set_property PACKAGE_PIN J25 [get_ports rx_evt]
顶层TOP：
module n101_core_100T_top(
input jtag_TCK,
inout jtag_TMS,
//input jtag_TDI,
output jtag_dwen,
output tx_evt,
input rx_evt,
//input i_dbg_stop,
input jtag_rst,
input clk50mhz,
input rst_n
);
//wire jtag_TDI_IN;
wire jtag_TMS_out;
wire jtag_DRV_TMS;
wire jtag_TMS_in;
//assign jtag_TDI_IN=jtag_TDI;
assign jtag_TMS=jtag_DRV_TMS?jtag_TMS_out:1'bz;
assign jtag_TMS_in=jtag_TMS;
n101_core_wrapper n101_core_wrapper(
.jtag_TCK(jtag_TCK),
.jtag_TMS_in(jtag_TMS_in),
.jtag_TDI(),
.jtag_TDO(),
.jtag_DRV_TDO(),
.jtag_dwen(jtag_dwen),
.jtag_TMS_out(jtag_TMS_out),
.jtag_DRV_TMS(jtag_DRV_TMS),
.jtag_BK_TMS(),
.hart_halted(),
.i_dbg_stop(1'b0),
.sysrstreq(),
.core_clk_aon(clk50mhz),
.core_clk(clk50mhz),
.core_reset_n(rst_n),
.por_reset_n(jtag_rst),
.reset_bypass(1'b0),
.clkgate_bypass(1'b1),
.mtime_toggle_a(1'b1),
.dbg_toggle_a(1'b1),
.clic_irq(2'b00),
.htrans(),
.hwrite(),
.hsize(),
.hburst(),
.hmastlock(),
.hwdata(),
.hprot(),
.master(),
.hrdata(32'd0),
.hresp(2'b00),
.hready(1'b1),
.tx_evt(tx_evt),
.rx_evt(rx_evt),
.core_wfi_mode(),
.hart_id(32'h0),
.reset_vector(20'd0),
.core_sleep_value()
);
endmodule
改了，还是报相同的错，如下：
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Error: JTAG scan chain interrogation failed: all zeroes
Error: Check JTAG interface, timings, target power, etc.
Error: Trying to use configured scan chain anyway...
Error: riscv.cpu: IR capture error; saw 0x00 not 0x01
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Warn : Bypassing JTAG setup events due to errors
Error: dtmcontrol is 0. Check JTAG connectivity/board power.
Warn : target riscv.cpu examination failed
Info : starting gdb server for riscv.cpu on 3333
Info : Listening on port 3333 for gdb connections
Error: Target not examined yet
那连线是如何连的呢
改了，还是报相同的错，如下：
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Error: JTAG scan chain interrogation failed: all zeroes
Error: Check JTAG interface, timings, target power, etc.
Error: Trying to use configured scan chain anyway...
Error: riscv.cpu: IR capture error; saw 0x00 not 0x01
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Warn : Bypassing JTAG setup events due to errors
Error: dtmcontrol is 0. Check JTAG connectivity/board power.
Warn : target riscv.cpu examination failed
Info : starting gdb server for riscv.cpu on 3333
Info : Listening on port 3333 for gdb connections
Error: Target not examined yet
看错了，不是报all ones了，而是报 all zeros
看了下配置文件，还有个地方对应改成如下
ftdi_layout_signal JTAG_SEL -data 0x0100 -oe 0x0100
改了，还是报相同的错，如下：
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Error: JTAG scan chain interrogation failed: all zeroes
Error: Check JTAG interface, timings, target power, etc.
Error: Trying to use configured scan chain anyway...
Error: riscv.cpu: IR capture error; saw 0x00 not 0x01
Info : hbird_debugger: This TAP's version is too old, trying use async sequence to handshake..
Warn : Bypassing JTAG setup events due to errors
Error: dtmcontrol is 0. Check JTAG connectivity/board power.
Warn : target riscv.cpu examination failed
Info : starting gdb server for riscv.cpu on 3333
Info : Listening on port 3333 for gdb connections
Error: Target not examined yet
四线没有问题
看了下配置文件，还有个地方对应改成如下
ftdi_layout_signal JTAG_SEL -data 0x0100 -oe 0x0100