Sonic Alert 2.8 user manual Revision

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