Bus Pirate to read/write Uprint

[jthand]

Hello,

I have made an attempt to read the chip using a bus pirate. I think I have it connected correctly. I have downloaded python and pycrypto. I am using PuTTy to connect to the Bus Pirate, when I enter "$ ./bp_read.py /dev/ttyUSB0 eeprom.bin" to read the chip, all that comes up is BOOTLOADER. Would someone please school me a bit to tell me what I am doing wrong?

Thanks, John

[rowlandski]

Can you give a bit more detail? Is the eeprom.bin file generated? If so, what's its contents?

R

[jthand]

Sorry, When I use the Putty I get the following:

1-WIRE>$ ./bp_read.py eeprom.bin Are you sure? y BOOTLOADER It does nothing after the BOOTLOADER and I have to reset the Bus Pirate. No eeprom.bin file is created. It seems that the call is getting caught in a loop and I cant get out without resetting the bus pirate.

I have followed the directions from other examples and tried to do it manually and get the below:

SEARCH (0xF0) Macro 1WIRE address 1.0xB3 0xEF 0xEF 0x00 0xD0 0x14 0x10 0x2F *Unknown deviceDevice IDs are available by MACRO, see (0). the r:512 results in a repeated 0xFF

[RobListon]

It looks like you are using putty to connect directly to the bus pirate and then entering the python command. You should just be running the python command which will open the connection to the bus pirate and run the commands for you. The "1-WIRE>" prompt means that you are at the bus pirate's 1-wire mode command interface.

[bvanheu]

Exactly as Rob put it, you just have to connect the bus pirate to your device, then run the Python script. The first parameter is the path to the serial device, the second is the path where the EEPROM should be dump.

It might be easier if you're booting into Linux.

[jthand]

Thanks,

I am not at all familiar with connecting to a com port with python. Is there any tricks? When I copy and paste the "$ ./bp_read.py /dev/ttyUSB0 eeprom.bin" I get a syntax error. Would you please give me some basic how to's

[RobListon]

1) Go to your "/stratasys/helper" directory (For me it's "~/stratasys/helper"). 2) Type "./bp_read.py /dev/ttyUSB0 eeprom.bin" 3) Profit! No, just kidding. It should dump the eeprom to a file for you in the helper directory. If it doesn't it should give you an error with traceback that can help track down the problem.

[jthand]

Rob, Thanks for the help. I am doing the following, but I am getting the following.

os.chdir('C:\Users\jthan_000\Desktop\stratasys-master\helper') ./bp_read.py /dev/ttyUSB0 eeprom.bin File "", line 1 ./bp_read.py /dev/ttyUSB0 eeprom.bin ^ SyntaxError: invalid syntax

[RobListon]

Oh, you are running this from a windows machine. Then you would type "bp_read.py COM1 eeprom.bin" with COM1 being replaced with whatever com port the bus pirate shows up as.

[jthand]

That helps but I am now getting the following:

bp_read.py COM4 eeprom.bin File "", line 1 bp_read.py COM4 eeprom.bin ^ SyntaxError: invalid syntax

[RobListon]

I just installed my bus pirate on my windows machine to try and see if I could get the same error but can't replicate it yet. I think you will need to post the entire command you typed and it's output. Also, can you try "python bp_read.py COM4 eeprom.bin" and see if you get a different result?

[RobListon]

What version of python are you running? I think Fedora uses python3 as the default now and this program doesn't run in python3 yet.

[jthand]

It is 2.7.8

[RobListon]

Hmm...how are you getting the exact same syntax error on both windows and linux? Are you running these commands directly from a terminal window on either of these operating systems?

[jthand]

Ok, I have a little progress but now I am getting a different error:

C:\Python27>python bp_read.py COM4 eeprom.bin Device found: 0xB3 0xEF 0xEF 0x00 0xD0 0x14 0x10 0x2F Reading... Done! Traceback (most recent call last): File "bp_read.py", line 147, in f.write(hex2bin(memory)) File "bp_read.py", line 40, in hex2bin return hexadecimal.replace("0x", "").replace(" ", "").decode("hex") AttributeError: 'NoneType' object has no attribute 'replace'

C:\Python27>

this creates an eeprom file, but I believe it is blank. What is the best way to read the bin file?

[bvanheu]

It seems like bp.onewire_read(512) does not return the EEPROM data correctly.

Please see the issue #8 . You can always dump the EEPROM manually, but if you are able to debug & fix the problem on Windows, that would be great ;)

[jthand]

I tried issue #8 already but all I get is a repeated 0xFF. I have gotten the bp_read.py file to run with no issues (I think). It creates a bin file that has a size of 1kb. Could you give a newbie some direction on how to read the file?

The link to the file is below: https://drive.google.com/open?id=0B_hWDzwnVoPmYzNHQW1mRFhKSUE&authuser=0

[bvanheu]

Wont fix as the rapsberry pi is the preferred method to read/write on the eeprom.