USB SPI Flasher with PIC18F2455 - now with source and binaries

[blackillusion]

Uk guys try uk.farnell.com free shipping aswell.im kind of stuck with which crystals to get it rather baffled theres so many.

[doveman]

Thanks for the tip. My Dad suggested them earlier when I spoke to him and they seem pretty good and free shipping as well as you say

[maximilian0017]

Uk guys try uk.farnell.com free shipping aswell.im kind of stuck with which crystals to get it rather baffled theres so many.

Crystals, 12 Mhz, through hole, sort for price, non us stock, look for enough in stock.

http://uk.farnell.com/citizen-america/hc49us12-000mabj-ub/crystal-12m-18pf-cl-hc49-4h/dp/1611710


(C1 = C2 = 2 * 18pF - 5pF = 31pF ?!?, seems a bit high, would get 2x22pF and 2x30 pF, can anyone confirm?)


Or your local parts bin, usbhubs, motherboards etc

[TeeBee918]

The programming hardware is the same for all xboxes, should not be a problem.

You are using short wires and a crystal, have you rechecked the soldering/wiring?

What is the manufacturedate?

Yes, I am using a real crystal (12 MHz) + 2 caps. Wires are about 12-15 centimetres. I rechecked everything a LOT of times... The flasher should be OK then, because of the perfect 16MB dumping (and I am using 3b plus2 fw). The flasher would not dump small NANDs so well if it was not OK, would it? The manufacture date of the Xbox is: 2009-05-06, the NAND is Hynix HY27UF084G2B. People were talking about Samsung large NANDs a few pages back. Could that be the problem, that mine is a Hynix (although my Falcon's 16 MB is a Hynix too...)? I don't know, should I give up and be content with the small NAND dumping? I'd like to uncripple that Jasper though.

[maximilian0017]

I rechecked everything a LOT of times... The flasher should be OK then, because of the perfect 16MB dumping (and I am using 3b plus2 fw). The flasher would not dump small NANDs so well if it was not OK, would it?

Was referring to the wiring between the Pic flasher and the xbox itself, you had to reinstall the flasher into this xbox.
If the NAND chip is different and reports a different config it sounds plausible that this could cause this problem.
(Should nandpro2b not report the flashconfig?!?)

For this have to refer to the other hackers here, do not have the same xbox as you so i cannot check it out for myself.

Edit: mmmm maby would try to get XFlash.py to show me the flashconfig with read, but dont know if this is your "cuppa tea"

[TeeBee918]

No, NandPro does not report a flashconfig (shows only the error message). And I already tried Xflash.py (I'm a bit familiar with Python), shows flashconfig 00000000 and dumps a bunch of 0x00s (and dumps only 16MB of "data" no matter what). Besides I checked the wiring from the flasher to the Xbox a hundred times, everything seems fine. In about 2-3 weeks I'm gonna try with another 512MB Jasper (my friend's) and I'll see what happens. Thanx for all your help.

[SpikedCola]

Out of curiosity, are the resistors on all the pins to do a sort of el-cheapo level shifting between 5v and 3v3? Or, put another way, does the 360's logic that we're interfacing with run at 5v or 3v3?

[Arakon]

3.3V.
And the resistors also serve as protection (voltage peaks etc).

[SpikedCola]

Hmm. Would it be a better idea for me to implement a 5v to 3v3 level translator in the flasher Im building, like the MAX3378, instead of using resistors? It seems like a lot of people are having trouble with resistor values, using diodes, etc.

[cory1492]

I've done my own voltage tests with the recommended resistor values, it reads 3.3V on the xbox side of things so they are definitely doing their job. A proper high speed voltage shifter would probably be a better way to go than resistors, just to keep edges/peaks cleaner, but it works OK as is.

TeeBee918: the wiring is the same, there are no other mods to do to make it work with jasper. If you aren't getting flash config, something else is up. I'm not sure, and you don't seem to mention it directly, is the jasper booting a retail dash without issues? Have you tried the lpt method on it to see if you get different results? Is the console extremely new (ie: newer than ones that came with exploitable kernel.) Something you could try, if all that isn't enough, is checking that the points you connect the flasher to (besides ej, as you have proven that is working) are all connected to what they are supposed to be, that any pull downs or pull ups are in place and other thoughts along those lines (see speedy H&C diagram pdf for some older reference material.)

[maximilian0017]

Hmm. Would it be a better idea for me to implement a 5v to 3v3 level translator in the flasher Im building, like the MAX3378, instead of using resistors? It seems like a lot of people are having trouble with resistor values, using diodes, etc.

The people talking about different resistors/diodes are all talking about the LPT hack, this has nothing to do with the Pic Nand flasher.

Mine is rock solid.

[SpikedCola]

Hmm. Would it be a better idea for me to implement a 5v to 3v3 level translator in the flasher Im building, like the MAX3378, instead of using resistors? It seems like a lot of people are having trouble with resistor values, using diodes, etc.

The people talking about different resistors/diodes are all talking about the LPT hack, this has nothing to do with the Pic Nand flasher.

Mine is rock solid.

I was just curious if using a level translator vs the resistors on the pic was a more 'proper' way to do it.

[KEKSi]

since the 18f2550 and 18f2455 are sold out at reichelt, can someone tell me if the pic18f2450 would work as well ?
its a little bit smaller but it got the usb part

[dak]

http://www.virtual-village.com.au/pic28-prototype-kit-for-28-pin-microcontrollers-18f2550-006401-061.html
Would this thing work, any1 tested this ?
Would make it easy for a lot of people.
It costs 11€ at ebay + 5€ for shipping from china, i guess its a good alternative, if it works.

[Arakon]

That's a prototyping board, ot a programmer. It says you need an additional programmer.

[dak]

Yes Arakon, but i thought it would work as a flasher for lazy ppl.
You'd just have to figure out which pins you have at the RJ45/com, add the resistors at the cable und plug a progged pic in it.

[ColtB45]

since the 18f2550 and 18f2455 are sold out at reichelt, can someone tell me if the pic18f2450 would work as well ?
its a little bit smaller but it got the usb part

No, the 18f2450 doesn't have the necessary MSSP(SPI/I2C) interface. It could never be used as a SPI interface.

Furthermore, don't double post or start a new thread just because you didn't get a reply as quick as you wanted. If a mod hasn't done it yet I would suggest you delete the new topic you started.

[ChaoZ]

Hi Cory and gupek,

I have the same problem as gupek before,
I build the art2003 programmer to flash the bootloader for pic18f4550
flash bootloader okay
connect usb, detected by PDFUSB.exe, and installed drivers
flash picflash.hex
windows detect "access memory", can't find drivers to install
then stop working

went back to winpic800 and just can't erase and flash over old bootloader.

I would like to know, when 4.5-5.5V is needed for VDD to reflash/erased? and would need to use external power supply?
gupek, you got it working, how?

I tried putting the power directly from the USB, the voltage across VDD and VSS keeps dropping to 2.5V instead of 5V

need help. do not think i need to use an external programmer right?

thanks in advanced.

[maximilian0017]

windows detect "access memory", can't find drivers to install
then stop working

The driver needed is included in the Nandpro 2b release dir.

An art2003 will normally deliver enough power for flashing, maby you need to restart your pc after a flash?

If you connect it to usb and the usb voltage drops to 2,5 volt you have a problem, check for bad wiring/shorts or electrolitic capacitors that are turned around.

[Mooner2]

Any recommend Load Capacitance for the 12Mhz crystal? 18pf with 2x31pf caps to ground?