USB SPI Flasher with PIC18F2455 - now with source and binaries

[gepal]

dumps are usually binary, hex files are basically text.. it's normal that they don't match up.
use the verify function to be sure.

By saying "dump" I mean read PIC/save to file with winpic800. And no, dump is not binary, but hex as source is.
Most visible difference between dump and original file is that header in original is in the beginning of the file and in dump header is in the end.
Yes they don't match but I also see differences in the body.

Also interesting thing is comparing disassembled files, dumped one and original. They are identical !!

So I guess I need to look deeper into wiring of flasher because PIC programmer works as expected.

edit: Wiring seems OK. I was thinking that there is problem with resonator, so I changed it to oscillator with 22pf capacitors wired to the ground. Problem still remains. Anyone have ideas ?

[maximilian0017]

Anyone have ideas ?

Sometimes USB de vices give a VID/PID of 0000 because the cable is broken or the processor isn't (correctly)running.

Would check the following:
USB wiring(data wires wrong way around) and 5v/gnd
Crystal/capacitor setup
Make sure that while programming you select the correct oscillator

And try without a xbox connected

With a picture of your setup we could probably help more

[SpikedCola]

Built the circuit on a breadboard, flashed the bootloader, and it worked the first try! So I decided to design a small board for it:





On my way to school to etch it now. More pictures to follow

[nicmon]

Hi, is there any other variant of PIC18F2455 that we could use instead? e.g. PIC18F2550

any help will be appreciated

[docentore]

Hi, is there any other variant of PIC18F2455 that we could use instead? e.g. PIC18F2550

any help will be appreciated

I don't want to be rude, I am looking for some info as well, but before asking I read the whole thread twice, and then if info was missing or I didn't understand something I asked. I would suggesting doing the same, answer to your question was given good few times.

[gepal]

Built the circuit on a breadboard, flashed the bootloader, and it worked the first try! So I decided to design a small board for it:





On my way to school to etch it now. More pictures to follow

your schematics shows xtal with caps, but board itself is designed to use resonator.
where is typo ?

[SpikedCola]

What you see on the schematic is the 'internal view' of a resonator - a resonator consists of a crystal and the two caps in one package.

[gepal]

What you see on the schematic is the 'internal view' of a resonator - a resonator consists of a crystal and the two caps in one package.

I know internals of tripod resonator. I also know how tripod resonator is displayed in schematics. Only want to note that board and schematic do not match at this point.
People may be confused when looking at those pictures.

[Arakon]

I'd recommend going for xtal and caps instead of the resonator. I rebuilt my constantly erroring programmer earlier, using the xtal instead of the resonator, and it works perfectly.

[gepal]

dumps are usually binary, hex files are basically text.. it's normal that they don't match up.
use the verify function to be sure.

By saying "dump" I mean read PIC/save to file with winpic800. And no, dump is not binary, but hex as source is.
Most visible difference between dump and original file is that header in original is in the beginning of the file and in dump header is in the end.
Yes they don't match but I also see differences in the body.

Also interesting thing is comparing disassembled files, dumped one and original. They are identical !!

So I guess I need to look deeper into wiring of flasher because PIC programmer works as expected.

edit: Wiring seems OK. I was thinking that there is problem with resonator, so I changed it to oscillator with 22pf capacitors wired to the ground. Problem still remains. Anyone have ideas ?

Problem solved. I added USB-B into board and used whole USB cable instead of soldered-in USB cable.
Successfully used flasher to uncripple hdd.

Here is setup of my board:

[icuithink]

anyone selling usb Nand readers i have dumped mine with lpt but it takes way to long

[maximilian0017]

Looks like the board went back to a backup as my last post here has dissapeared, well ok, lets type it again:

Really like the PCB, Few idea's:
1. Xtal would be better, or you could at least modify the pcb so it can take Xtal/Capacitor too
2. Maby you could also add a pinhearder for the serial debug mode(rx/tx) with a pinhearder to enable/disable it.
(hopefully someone will program it into the firmware,

Hope you will also sell bare pcb's, would be interested.

[Arakon]

All posts related to buying or selling these are in General 360 now. This is a technical thread, not a shop.

[MrBrown666]

hi everybody,

I did some homebrew etching to make a some PCBs. looks like this:


It's designed very close to DarkstarTM's schematic

if anyone wants to try, here is my stencil:
http://img97.imageshack.us/img97/4972/nandflashervorlage.pdf

and here the component diagram:

(the blue line is a jumper wire)

[sandungas]

First time i built the "mini-board" was to confirm that the drawing i did was right ---> http://www.xboxhacker.net/index.php?topic=12306.msg90216#msg90216
After this... i was thinking how to mount it permanently inside the case, and this is the result


Now im working in a case for the usb-flasher (to be installed permanently inside the 360)

*I will upload photos of the usb-flasher case when will be finished

The cable



*I will upload an updated diagram in few days, a bit more simplified, and with some variations (4 drawings)

[joeyddr]

hi everybody,

I did some homebrew etching to make a some PCBs. looks like this:


It's designed very close to DarkstarTM's schematic

if anyone wants to try, here is my stencil:
http://img97.imageshack.us/img97/4972/nandflashervorlage.pdf

and here the component diagram:

(the blue line is a jumper wire)

according to  the initial diagram you have you caps swapped

[MrBrown666]

ok ok maybe it's not thaaat close to the schematics.
i relocated the capacitors to solve some routing problems. trust me it is connected properly. this way it uses only 1 jumper wire instead of 2.

EDIT: ok i just checked my board and guess what. i really did swap the capacitors. it's right in the diagram i posted but i placed them like in the original schematic when i soldered them. but it still works. i dumped my nand 3 times without any unusual errors and flashed one block to unlock my HDD without any errors.

[d4m4n]

Phew... finally got it working. I had big problems with ART2003 programmer and WinPic800. The fix was to change the hardware settings "Use Vdd" and "Use Mclr" both to on or off if I got an error message. These setting sometimes had to be on and sometimes off for the same function (read, erase, program, verify).

[Dream]

Thanks and merry xmas.
USB SPI works great and one 16mb nand dump time was 6 min 35 Sec.
Love your work guys.

http://dream.pic.fi/kuvat/Xbox%20360/HiTec%20XBReboot%200.05/Dream%20USB%20mKo%20Nand%20Dump/

[maximilian0017]

Pin18 = rb7/pic uart rx (18F2455)
Pin17 = rb6/pic uart tx

Shouldn't that be:
Pin18 = RC7/pic uart rx
Pin17 = RC6/pic uart tx

And witch unused pin could we best use for switching between USB-Serial and USB-SPI?