6.2 JTAG system-level debugger

30

6.2.3Control Keys

Once running, the jtag program responds to a number of command se- quences, all beginning with [Ctrl A] .

[Ctrl A] B

Send a break

[Ctrl A] S

Send a file using XModem

[Ctrl A] L

Toggle logging to jtag.log

[Ctrl A] T

Send an ascii file

[Ctrl A] P

Choose baud rate

[Ctrl A] Q

Quit

[Ctrl A] R

Hardware reset

 

 

6.2.4Blast protocol

When used with the mdebug image, the jtag program recognizes the start- of-download request sent by the device, and will prompt the user for a file name to send. Refer to the example in the mdebug section for details.

6.2.5Quick-start download and burn

If you have a minidebug for your platform in the current working directory, the following sequence shows the process of using it to download and burn a new u-boot image.

Start debugger.

$ cd ..

$ ./jtag -d

ioport 3bc wrote 5d read ff using printer port at 378

IDCODE: 69264013 - 0110 1001001001100100 00000001001 1

Halt released

Waiting for stub

LDIC finished

This uses the program minidebug on the arm to download to ram using the serial port(xmodem protocol) or blast the file using ethernet

^A Q for quit, ^A B external break, ^A S for sending a file with xmodem, ^A I for sending an RGB bitmap with xmodem, ^A P baudrate

^A T to send an ascii file

DBG-Vector Trap A0008000

 

 

 

 

R0:

00000000

R1:

0000014C

R2:

00000000

R3:

00000003

R4:

0000001E

R5:

81A0F288 R6: AAA00010 R7: 000BD784

R8:

00000000

R9:

81A18774

SL:

AAA0001C

FP:

81A1606C

IP:

80039094

SP:

A0003400

LR:

8006C8CC

PC:

A0008000

CPSR 600000D3

FP0:

0000000000

 

 

 

 

.

To download using serial, use the ’dl address’ command.

Hit [Ctrl A] S to send the file (assumes u-boot.bin in the current direc- tory). After issuing the DL command, the minidebug will begin sending C’s. These are the start commands for XModem, and signal the readiness

December 28, 2005

Revision 2.8

Page 30
Image 30
Sonic Alert 2.8 user manual Revision

2.8 specifications

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