Chris at 13:00, 14 July 2007

2007-07-14T13:00:27Z

RBot: Bot (Edward's framework)

2007-03-07T03:34:33Z

Bot (Edward's framework)

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== Using JTAGER with the Juicebox ==
=== Introduction ===
JTAGER has not been updated for a while but is a great program. It comes with support for the ARM7TDMI built in but only supports wiggler jtag hardware.

JTAGER is useful for debugging and downloading binary files to the JB. See [[JuiceBox Code Test]] for demo programs.

=== Install ===
Download the tarball from http://jtager.sourceforge.net/

Read the README file for install instructions (./configure && make && make install should do it)

=== Usage ===
This will take you through running the lcd_2 demo on your Juicebox using JTAGER. Note that I am using # for comments but this is not actually valid - it is just to clarify what the command is doing.

<pre>
#see available commands
JTAGER> help
*snip - see your output from this*

#halt the CPU
JTAGER> halt
Requesting HALT target ... [OK]
The target is halted in ARM mode.

#Verify the CPU
JTAGER> idcode
Device ID = 0x1F0F0F0F
bit[0] = 1, always be 1, required by IEEE Std 1149.1
Manufacturer (bit[11:1]): 0x787 - SAMSUNG
Part number (bit[27:12]): 0xF0F0
Version (bit[31:28]) : 0x1

#Copy the lcd_2 demo to memory (you have to hit enter twice)
#be sure to copy the BIN file and not the ELF file
JTAGER> memset --base=0x0c001000 --infile=hacking/juicebox/jb-code/lcd_2.bin
memset: Fill the memory block [0x0C001000, 0x0C0017EB] with the file "hacking/juicebox/jb-code/lcd_2.bin" ...
. [OK]
Total 2028 bytes are written.

#restart the proc at the correct entry point
JTAGER>JTAGER> restart 0x0c001000
Restarting the target processor at 0x0C001000
</pre>

That's it You should now be looking at the LCD demo starting with the text "Juicebox LCD Demo #2" on the screen.

=== What is going on here? ===
Read the lcd_2.dld file from the lcd_2 tarball - this gives a clue as to where to copy the BIN file.

<pre>
/* Memory Definitions */
MEMORY
{
RAM (rw) : ORIGIN = 0x0c001000, LENGTH = 0x00010000
SRAM (rw) : ORIGIN = 0x010001000, LENGTH = 0x1000

}
</pre>

The Juicebox memory (RAM) starts at 0x0c001000 - therefore that is where we copy the BIN to.

Now that you can copy binaries to your juicebox and run them it's time to start writing your own code. See [[JuiceBox Software Development]] for help.

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	Now that you can copy binaries to your juicebox and run them it's time to start writing your own code. See [[JuiceBox Software Development]] for help.		Now that you can copy binaries to your juicebox and run them it's time to start writing your own code. See [[JuiceBox Software Development]] for help.
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		+	[[Category:Development Tools]]

Using Jtager - Revision history

Chris at 13:00, 14 July 2007

RBot: Bot (Edward's framework)