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Re: USB Cable for Programming Xilinx FPGA (Spartan 3)

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langwadt@fonz.dk wrote:
> if it's got the right drivers it should work, though it might not work
> with the xilinx programming tools, and for stuff like encryption keys in
> spartan6 you need the real Xilinx one.

I don't know the Xilinx cables as such, but there's no such thing as
standard JTAG interfaces.  So there's no generic JTAG framework for
Windows/Linux/whatever that vendors write drivers for.  In Altera land,
either it's a hardware clone of Altera's USB Blaster, or it doesn't work. 
That implies you either need a Xilinx cable or a Xilinx-compatible one.

Some of these cables can be used by other software like OpenOCD, which has
its own set of backends for them, but the vendor tools don't hook into this. 
So while there is a set of fairly comprehensive hardware drivers (JTAG is
just bitbanging after all, so the driver is fairly trivial) they aren't used
by the software that matters.

Theo

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Thread

USB Cable for Programming Xilinx FPGA (Spartan 3) "Anand P. Paralkar" <anand.paralkar@gnospammale.com> - 2014-10-17 23:02 +0530
  Re: USB Cable for Programming Xilinx FPGA (Spartan 3) langwadt@fonz.dk - 2014-10-17 10:46 -0700
    Re: USB Cable for Programming Xilinx FPGA (Spartan 3) Theo Markettos <theom+news@chiark.greenend.org.uk> - 2014-10-17 20:10 +0100
      Re: USB Cable for Programming Xilinx FPGA (Spartan 3) rickman <gnuarm@gmail.com> - 2014-10-17 15:30 -0400
  Re: USB Cable for Programming Xilinx FPGA (Spartan 3) "Anand P. Paralkar" <anand.paralkar@gnospammale.com> - 2014-10-18 15:14 +0530
    Re: USB Cable for Programming Xilinx FPGA (Spartan 3) Petter Gustad <newsmailcomp6@gustad.com> - 2014-10-19 11:06 +0200
      Re: USB Cable for Programming Xilinx FPGA (Spartan 3) Theo Markettos <theom+news@chiark.greenend.org.uk> - 2014-10-19 12:08 +0100

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