Patch spi - Githubissues

stacksmashing / pico-tpmsniffer

A simple, very experimental TPM sniffer for LPC bus

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Patch spi #8

Open zaphoxx opened 7 months ago

zaphoxx commented 7 months ago

updated the spi sniffer capability

added handling of WAIT states
added handling of #bytes transmitted (instead of reading only 1byte from MISO)
added gpios to handle dipswitch input for sniffer mode selection
added some blinkyblink on the onboard led when sniffing starts and when key has been found
update the pio spi file to flush the isr when select line is low on raising clock edge to avoid bit offsets
moved the countdown (5 sec) after the logo shows and made the countdown (sleep) visual
dipswitch position 0 --> spi bios sniffing; dipswitch position 1 --> lpc sniffing
added the gerberfile(s) from my pcb for reference
vmk header check is updated

i think thats it. let me know if you have any questions or suggestions.

nezza commented 3 months ago

I finally got an SPI machine - so I will try to test this :)

Cybercop-Training commented 2 months ago

@zaphoxx Thanks for creating this upgrade project 👍 Would it be possible to share your KiCad files from the modified SPI sniffer aswell?

The reason why I ask this is because I was able to export a CPL (component placement list) file from the original KiCad files that were provided by stacksmashing. I couldn't find a way to extract such a CPL file only from the gerber files that you did provide on your github.

Together with the gerber files, the CPL file and a little BOM list I was able to use the soldering service from the company pcb way to create the original pico TPM sniffer. Maybe it's possible to create a similar project with yours aswell?

pico_tpm_sniffer

zaphoxx commented 1 month ago

Hi, thanks for your praise and sorry for the very late response. Unfortunately there is no BOM available as I did that online with the easyEDA tool on the fly and just used some available footprints that would suit my needs. I ordered the parts seperately and soldered it myself (i didnt need the pogo pins, so i left them out on my board). From what i can see the footprints used where for

Name Designator Footprint KH-2.54PH180-1X6P-L11.5 H1 HDR-TH_6P-P2.54-V-M-1
DIP switchEI-04 SW1 SW-TH_DIPSWITCHEI-04
Button-SMD-4x4x1.5 SW2,SW3 SW-SMD_4P-L5.2-W5.2-P3.70-LS6.5 PICO U1 COMM-SMD_L51.0-W21.0-P2.54_SC0916
X9555WV-2X04-6TV01 U2 IDC-TH_8P-P2.54_XKB_X9555WV-2X04-PTV01

Hope that helps Best

Cybercop-Training commented 1 week ago

@zaphoxx Now it was me who didn't recognize your response :-) Thanks for sharing the footprints. If possible are you able to share a picture (front and back) how your sniffer with soldered components looks like? Would it be possible for you to create a export from your easyEDA project? I think it's file --> export --> easyEDA... Output will be a json file. Maybe I can try to import the file in easyEDA then to check if it's possible to create a soldering project from there...

Thanks in advance and best regards Cybercop