Sending data using lf sim

xavierrr · 2018-02-25 05:31:42

Hi, I have a question about the function of lf sim and possible modifications that I could make on this command.

In my understanding, lf sim is simulating a passive tag. When the simulation begins, the Proxmark will detect the reader field and once detected, the data in the graph buffer will be sent.

I am wondering if I can modify the code so that the command transmits the data in the graph buffer once I entered the command without waiting for the reader field?

iceman · 2018-02-25 06:38:16

?? doesn't it do that already? It sends the data to the device, then enters the loop where it detects readerfield? Look at armsrc/lfops.c...

xavierrr · 2018-02-25 06:59:44

Sorry for any confusion but I mean if I can send the data immediately after the command typed without waiting for the reader field.

I looked into SimulateTagLowFrequency function, it seems the FPGA is set to FPGA_MAJOR_MODE_LF_EDGE_DETECT mode which I believe is used to detect the reader field. I am wondering in which file does this mode defined that I may possibly modify? Or there are another mode that I can send the data in the graphbuffer out directly?

iceman · 2018-02-25 07:23:12

I belive the whole LF sim code is inside the lfops.c If it looks for a readerfield you usually see a reference to reading adc values.
Go bananas and have fun! if it turn out to be any good, make a PR

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#1 2018-02-25 05:31:42

Sending data using lf sim

#2 2018-02-25 06:38:16

Re: Sending data using lf sim

#3 2018-02-25 06:59:44

Re: Sending data using lf sim

#4 2018-02-25 07:23:12

Re: Sending data using lf sim

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