J-Link Commander

    本文以J-Link ARM V4.35为例进行说明。

1 命令

    输入？可以查询所支持的命令：

J-Link>?

Available commands are:
----------------------
f          Firmware info
h          halt
g          go
Sleep      Waits the given time (in milliseconds). Syntax: Sleep 
s          Single step the target chip
st         Show hardware status
hwinfo     Show hardware info
mem        Read memory. Syntax: mem  ,  (hex)
mem8       Read  8-bit items. Syntax: mem8  ,  (hex)
mem16      Read 16-bit items. Syntax: mem16 ,  (hex)
mem32      Read 32-bit items. Syntax: mem32 ,  (hex)
w1         Write  8-bit items. Syntax: w1 ,  (hex)
w2         Write 16-bit items. Syntax: w2 ,  (hex)
w4         Write 32-bit items. Syntax: w4 ,  (hex)
wm         Write test words. Syntax: wm 
is         Identify length of scan chain select register
ms         Measure length of scan chain. Syntax: ms 
mr         Measure RTCK react time. Syntax: mr
q          Quit
qc         Close JLink connection and quit
r          Reset target         (RESET)
rx         Reset target         (RESET). Syntax: rx 
RSetType   Set the current reset type. Syntax: RSetType 
Regs       Display contents of registers
wreg       Write register.   Syntax: wreg , 
SetBP      Set breakpoint.   Syntax: SetBP  [A/T] [S/H]
SetWP      Set Watchpoint. Syntax:  [R/W] [ [] [A-Mask]]
ClrBP      Clear breakpoint. Syntax: ClrBP  
ClrWP      Clear watchpoint. Syntax: ClrWP  
VCatch     Write vector catch. Syntax: VCatch 
loadbin    Load binary file into target memory.
             Syntax: loadbin , 
savebin    Saves target memory into binary file.
             Syntax: savebin , , 
SetPC      Set the PC to specified value. Syntax: SetPC 
le         Change to little endian mode
be         Change to big endian mode
log        Enables log to file.  Syntax: log 
unlock     Unlocks a device. Syntax: unlock 
           Type unlock without  to get a list
           of supported device names.
           nRESET has to be connected
---- CP15 ------------
rce        Read CP15.  Syntax: rce , , , 
wce        Write CP15. Syntax: wce , , , , 
---- ICE -------------
Ice        Show state of the embedded ice macrocell (ICE breaker)
ri         Read Ice reg.  Syntax: ri (hex)
wi         Write Ice reg. Syntax: wi , (hex)
---- ETM -------------
etm        Show ETM status
re         Read ETM reg.  Syntax: re 
we         Write ETM reg. Syntax: we , (hex)
es         Start trace
---- ETB -------------
etb        Show ETB status
rb         Read ETB register.  Syntax: rb 
wb         Write ETB register. Syntax: wb , (hex)
---- TRACE -----------
TAddBranch TRACE - Add branch instruction to trace buffer. Paras:,
TAddInst   TRACE - Add (non-branch) instruction to trace buffer. Syntax: 
TClear     TRACE - Clear buffer
TSetSize   TRACE - Set Size of trace buffer
TSetFormat TRACE - SetFormat
TSR        TRACE - Show Regions (and analyze trace buffer)
TStart     TRACE - Start
TStop      TRACE - Stop
---- SWO -------------
SWOSpeed   SWO - Show supported speeds
SWOStart   SWO - Start
SWOStop    SWO - Stop
SWOStat    SWO - Display SWO status
SWORead    SWO - Read and display SWO data
SWOShow    SWO - Read and analyze SWO data
SWOFlush   SWO - Flush data
---- File I/O --------
fwrite     Write file to emulator
fread      Read file from emulator
fshow      Read and display file from emulator
fdelete    Delete file on emulator
fsize      Display size of file on emulator
---- Test ------------
TestHaltGo   Run go/halt 1000 times
TestStep     Run step 1000 times
TestCSpeed   Measure CPU speed.
             Parameters: []
TestWSpeed   Measure download speed into target memory.
             Parameters:  [ []]
TestRSpeed   Measure upload speed from target memory.
             Parameters: [ [] []]
TestNWSpeed  Measure network download speed.
             Parameters: [ []]
TestNRSpeed  Measure network upload speed.
             Parameters: [ []]
---- JTAG ------------
Config     Set number of IR/DR bits before ARM device.
             Syntax: Config , 
speed      Set JTAG speed. Syntax: speed |auto|adaptive, e.g. speed 2000, speed a
i          Read JTAG Id (Host CPU)
wjc        Write JTAG command (IR). Syntax: wjc (hex)
wjd        Write JTAG data (DR). Syntax: wjd (hex), (dec)
RTAP       Reset TAP Controller using state machine (111110)
wjraw      Write Raw JTAG data. Syntax: wjraw , , 
rt         Reset TAP Controller (nTRST)
---- JTAG-Hardware ---
c00        Create clock with TDI = TMS = 0
c          Clock
0          Clear TDI
1          Set   TDI
t0         Clear TMS
t1         Set   TMS
trst0      Clear TRST
trst1      Set   TRST
r0         Clear RESET
r1         Set   RESET
---- Connection ------
usb        Connect to J-Link via USB.  Syntax: usb , where port is 0..3
ip         Connect to J-Link ARM Pro or J-Link TCP/IP Server via TCP/IP.
           Syntax: ip 
---- Configuration ---
si         Select target interface. Syntax: si ,
           where 0=JTAG and 1=SWD.
power      Switch power supply for target. Syntax: power  [perm],
           where State is either On or Off. Example: power on perm
wconf      Write configuration byte. Syntax: wconf , 
rconf      Read configuration bytes. Syntax: rconf
usbaddr    Assign usb address to the connected J-Link: Syntax: usbaddr = 
ipaddr     Show/Assign IP address and subnetmask of/to the connected J-Link.
gwaddr     Show/Assign network gateway address of/to the connected J-Link.
dnsaddr    Show/Assign network DNS server address of/to the connected J-Link.
conf       Show configuration of the connected J-Link.
ecp        Enable the  J-Link control panel.
calibrate  Calibrate the target current measurement.
selemu     Select a emulator to communicate with,
           from a list of all emulators which are connected to the host
           The interfaces to search on, can be specified
             Syntax: selemu [  ...]
ShowEmuList Shows a list of all emulators which are connected to the host.
            The interfaces to search on, can be specified.
             Syntax: ShowEmuList [  ...]
----------------------
NOTE: Specifying a filename in command line
will start J-Link Commander in script mode.