Xilinx platform cable USB API?
in [FPGA]
|
Prev: Picobalze in the FPGA
Next: Routing problem of DCM
From: MotM on 26 Feb 2007 08:46 Is there a way to access the platform cable USB from a user program (i.e., from outside the Xilinx toolchain) ? What I'd like to do is access a BSCAN module inside my design from a custom win32 application. Many thanks, Guy.
From: Andreas Ehliar on 26 Feb 2007 10:13 On 2007-02-26, MotM <Guy.Eschemann(a)gmail.com> wrote: > Is there a way to access the platform cable USB from a user program > (i.e., from outside the Xilinx toolchain) ? What I'd like to do is > access a BSCAN module inside my design from a custom win32 > application. Take a look at the following URLs: http://www.xilinx.com/publications/xcellonline/xcell_53/xc_jtag53.htm and http://www.s3group.com/system_ic/gnat/ /Andreas
From: Eric Smith on 27 Feb 2007 23:38 MotM wrote: > Is there a way to access the platform cable USB from a user program > (i.e., from outside the Xilinx toolchain) ? What I'd like to do is > access a BSCAN module inside my design from a custom win32 > application. Andreas Ehliar wrote: > Take a look at the following URLs: > http://www.xilinx.com/publications/xcellonline/xcell_53/xc_jtag53.htm > and http://www.s3group.com/system_ic/gnat/ Those articles show how to acess the JTAG interface from logic inside the FPGA. What MotM wants is to access the JTAG chain from the PC. Unfortunately Xilinx does not provide any API to do this, and believes that the interface to their PC4 and Platform USB cables is some kind of super-valuable trade secret, so the answer is that you can't do it with the Xilinx cable. You have to use a third party JTAG interface, and swap JTAG cables back and forth. :-( There *must* be some kind of API that Xilinx uses in their own software to do this. C'mon, guys, open it up for customer use! Eric
From: cs_posting on 27 Feb 2007 23:54 On Feb 27, 11:38 pm, Eric Smith <e...(a)brouhaha.com> wrote: > Unfortunately Xilinx does not provide any API to do this, and believes > that the interface to their PC4 and Platform USB cables is some kind > of super-valuable trade secret, so the answer is that you can't do > it with the Xilinx cable. You have to use a third party JTAG interface, > and swap JTAG cables back and forth. :-( I believe that one option is to use the Xilinx cable, but download your own firmware to it rather than the firmware the Xilinx tools download. Since the firmware defines the interface, you can then use it anyway you like... It is a Cypress fx2, isn't it? Or is is that only true of the Digilent cables? It is one of the FTD chips?
From: Eric Smith on 28 Feb 2007 02:25
cs_posting(a)hotmail.com writes: > I believe that one option is to use the Xilinx cable, but download > your own firmware to it rather than the firmware the Xilinx tools > download. Since the firmware defines the interface, you can then use > it anyway you like... Yes, you can do that. You have to download your own CPLD configuration too, unless someone reverse-engineers the one that Xilinx uses. So every time you switch between using the cable for Xilinx software vs. for your own software, you have to wait while the CPLD is reprogrammed. Sigh. |