jlink使用方法笔记

lantianyu520

   这段时间在用jlink调试freescale的mx51板子，下面将使用jlink的方法在此做一个笔记。

   jlink是segger公司的产品，由于正版的工具巨贵，所以现在大部分人都喜欢用山寨版的jlink，幸运的是我的山寨版jlink支持arm cortex a8，所以能调试mx51板子。

   jlink的官方提供调试软件和驱动，调试软件有jlink commander（j-tag调试）、j-mem（内存查看）、j-flash（flash烧写）等。我主要用到的是jlink commander，以下是它的命令集：

  SEGGER J-Link Commander V4.20h ('?' for help)

Compiled Oct  5 2010 19:11:57

DLL version V4.20h, compiled Oct  5 2010 19:11:41

Firmware: J-Link ARM V8 compiled Oct  5 2010 08:59:59

Hardware: V8.00

S/N: 20100214

Feature(s): RDI,FlashDL,FlashBP,JFlash,GDBFull

VTarget = 3.280V

Info: TotalIRLen = ?, IRPrint = 0x..FFFFFFFFFFFFFFFFFFFFFFF1

WARNING: CPU core not found.

No devices found on JTAG chain. Trying to find device on SWD.

WARNING: CPU core not found.

****** Error: Parity error (Data = 0xFFFFFFFF, ReceivedParity = 1)

No device found on SWD.

Did not find any core.

Info: TotalIRLen = 9, IRPrint = 0x0011

Found 2 JTAG devices, Total IRLen = 5:

 #0 Id: 0x2B900F0F, IRLen: 04, IRPrint: 0x0, ARM ETB

 #1 Id: 0x07B76F0F, IRLen: 05, IRPrint: 0x1, ARM1176 Core

ARM11 identified.

J-Link>

  Available commands are:

----------------------

f          Firmware info

h          halt

g          go

Sleep      Waits the given time (in milliseconds). Syntax: Sleep <delay>

s          Single step the target chip

st         Show hardware status

hwinfo     Show hardware info

mem        Read memory. Syntax: mem  <Addr>, <NumBytes> (hex)

mem8       Read  8-bit items. Syntax: mem8  <Addr>, <NumBytes> (hex)

mem16      Read 16-bit items. Syntax: mem16 <Addr>, <NumItems> (hex)

mem32      Read 32-bit items. Syntax: mem32 <Addr>, <NumItems> (hex)

w1         Write  8-bit items. Syntax: w1 <Addr>, <Data> (hex)

w2         Write 16-bit items. Syntax: w2 <Addr>, <Data> (hex)

w4         Write 32-bit items. Syntax: w4 <Addr>, <Data> (hex)

wm         Write test words. Syntax: wm <NumWords>

is         Identify length of scan chain select register

ms         Measure length of scan chain. Syntax: ms <Scan chain>

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 <DelayAfterReset>

RSetType   Set the current reset type. Syntax: RSetType <type>

Regs       Display contents of registers

wreg       Write register.   Syntax: wreg <RegName>, <Value>

SetBP      Set breakpoint.   Syntax: SetBP <addr> [A/T] [S/H]

SetWP      Set Watchpoint. Syntax: <Addr> [R/W] [<Data> [<D-Mask>] [A-Mask]]

ClrBP      Clear breakpoint. Syntax: ClrBP  <BP_Handle>

ClrWP      Clear watchpoint. Syntax: ClrWP  <WP_Handle>

VCatch     Write vector catch. Syntax: VCatch <Value>

loadbin    Load binary file into target memory.

             Syntax: loadbin <filename>, <addr>

savebin    Saves target memory into binary file.

             Syntax: savebin <filename>, <addr>, <NumBytes>

SetPC      Set the PC to specified value. Syntax: SetPC <Addr>

le         Change to little endian mode

be         Change to big endian mode

log        Enables log to file.  Syntax: log <filename>

unlock     Unlocks a device. Syntax: unlock <DeviceName>

           Type unlock without <DeviceName> to get a list

           of supported device names.

           nRESET has to be connected

---- CP15 ------------

rce        Read CP15.  Syntax: rce <Op1>, <CRn>, <CRm>, <Op2>

wce        Write CP15. Syntax: wce <Op1>, <CRn>, <CRm>, <Op2>, <Data>

---- ICE -------------

Ice        Show state of the embedded ice macrocell (ICE breaker)

ri         Read Ice reg.  Syntax: ri <RegIndex>(hex)

wi         Write Ice reg. Syntax: wi <RegIndex>, <Data>(hex)

---- ETM -------------

etm        Show ETM status

re         Read ETM reg.  Syntax: re <RegIndex>

we         Write ETM reg. Syntax: we <RegIndex>, <Data>(hex)

es         Start trace

---- ETB -------------

etb        Show ETB status

rb         Read ETB register.  Syntax: rb <RegIndex>

wb         Write ETB register. Syntax: wb <RegIndex>, <Data>(hex)

---- TRACE -----------

TAddBranch TRACE - Add branch instruction to trace buffer. Paras:<Addr>,<BAddr>

TAddInst   TRACE - Add (non-branch) instruction to trace buffer. Syntax: <Addr>

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 ------------

thg        Run go/halt 1000 times

ts         Run step 1000 times

testwspeed Test download speed.   Syntax: testwspeed [<Addr> [<Size>]]

testrspeed Test upload speed.     Syntax: testrspeed [<Addr> [<Size>] [<NumBlock

s>]]

testcspeed Test CPU speed.        Syntax: testcspeed [<RAMAddr>]

---- JTAG ------------

Config     Set number of IR/DR bits before ARM device.

             Syntax: Config <IRpre>, <DRpre>

speed      Set JTAG speed. Syntax: speed <freq>|auto|adaptive, e.g. speed 2000,

speed a

i          Read JTAG Id (Host CPU)

wjc        Write JTAG command (IR). Syntax: wjc <Data>(hex)

wjd        Write JTAG data (DR). Syntax: wjd <Data32>(hex), <NumBits>(dec)

RTAP       Reset TAP Controller using state machine (111110)

wjraw      Write Raw JTAG data. Syntax: wjraw <NumBits(dec)>, <tms>, <tdi>

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 <port>, where port is 0..3

ip         Connect to J-Link ARM Pro or J-Link TCP/IP Server via TCP/IP.

           Syntax: ip <ip_addr>

---- Configuration ---

si         Select target interface. Syntax: si <Interface>,

           where 0=JTAG and 1=SWD.

power      Switch power supply for target. Syntax: power <State> [perm],

           where State is either On or Off. Example: power on perm

wconf      Write configuration byte. Syntax: wconf <offset>, <data>

rconf      Read configuration bytes. Syntax: rconf

usbaddr    Assign usb address to the connected J-Link: Syntax: usbaddr = <addr>

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.

----------------------

NOTE: Specifying a filename in command line

will start J-Link Commander in script mode.

  总结一下我们使用的最多的命令：

  usb--------连接目标板

  r----------重启目标板

  halt-------停止cpu运行的程序

  loadbin----加载可执行的二进制文件

  g----------跳到代码段地址执行
  s----------单步执行（调试用）
  setpc-----设置pc寄存器的值（调试用）
  setbp-----设置断点

  Regs-------读寄存器组织

  wreg-------写寄存器

  mem--------读内存

  w4---------写内存

  power off mmu---关闭mmu，这个对于裸板调试很重要
  w4 cpsr,0x0000001f------切换到系统模式

  speed------设置jtag的传输速率
  rce 0,c0,c0,0-----设置cp15寄存器的第1个寄存器为0

  完结。