I have a requirment for a Rabbit to program a flash-based Xilinx FPGA
via a JTAG interface. The Rabbit would receive the data file via a
serial port and program the FPGA via its JTAG port. I've found alot of
info on using a JTAG port, but nothing that defines how to implement
the interface.
Does anyone know where I can get that level of detail? And words of
wisdom from anyone who's done this before are always welcome.
Steve
Programming FPGA
Started by ●March 17, 2011
Reply by ●March 17, 20112011-03-17
Steve,
A quick google search revealed the following Xilinx document titled
"Xilinx In-System Programming Using an
Embedded Microcontroller" that may be helpful to you:
http://www.xilinx.com/support/documentation/application_notes/xapp058.pdf
--Mike
A quick google search revealed the following Xilinx document titled
"Xilinx In-System Programming Using an
Embedded Microcontroller" that may be helpful to you:
http://www.xilinx.com/support/documentation/application_notes/xapp058.pdf
--Mike
Reply by ●March 17, 20112011-03-17
Last time we tried this, we discovered that the JTAG spec would have
cost us a lot of money. The faster solution was to use SPI to the FPGA.
I don't know which device you are using and whether it can do SPI, but I
think that is how the flash based devices work. We are using the
xc3s700.
-Pete F
-----Original Message-----
From: r... [mailto:r...]
On Behalf Of seecwriter
Sent: Thursday, March 17, 2011 3:17 PM
To: r...
Subject: [rabbit-semi] Programming FPGA
I have a requirment for a Rabbit to program a flash-based Xilinx FPGA
via a JTAG interface. The Rabbit would receive the data file via a
serial port and program the FPGA via its JTAG port. I've found alot of
info on using a JTAG port, but nothing that defines how to implement the
interface.
Does anyone know where I can get that level of detail? And words of
wisdom from anyone who's done this before are always welcome.
Steve
cost us a lot of money. The faster solution was to use SPI to the FPGA.
I don't know which device you are using and whether it can do SPI, but I
think that is how the flash based devices work. We are using the
xc3s700.
-Pete F
-----Original Message-----
From: r... [mailto:r...]
On Behalf Of seecwriter
Sent: Thursday, March 17, 2011 3:17 PM
To: r...
Subject: [rabbit-semi] Programming FPGA
I have a requirment for a Rabbit to program a flash-based Xilinx FPGA
via a JTAG interface. The Rabbit would receive the data file via a
serial port and program the FPGA via its JTAG port. I've found alot of
info on using a JTAG port, but nothing that defines how to implement the
interface.
Does anyone know where I can get that level of detail? And words of
wisdom from anyone who's done this before are always welcome.
Steve
Reply by ●January 9, 20132013-01-09
Pete,
I'm looking into this again. We are using a XC95288XL CPLD. Once we
get this working we'll move on to an FPGA.
Looking at AppNote 058 sample code, it bit thumps the JTAG pins. And
it appears that a hardware SPI would not work because it changes modes
by setting TMS and toggling TCK once. You can't do that with HW SPI.
What data type did you use?
Steve
--- In r..., "Fournier, Peter" wrote:
>
> Last time we tried this, we discovered that the JTAG spec would have
> cost us a lot of money. The faster solution was to use SPI to the FPGA.
> I don't know which device you are using and whether it can do SPI, but I
> think that is how the flash based devices work. We are using the
> xc3s700.
>
> -Pete F
>
>
> -----Original Message-----
> From: r... [mailto:r...]
> On Behalf Of seecwriter
> Sent: Thursday, March 17, 2011 3:17 PM
> To: r...
> Subject: [rabbit-semi] Programming FPGA
>
> I have a requirment for a Rabbit to program a flash-based Xilinx FPGA
> via a JTAG interface. The Rabbit would receive the data file via a
> serial port and program the FPGA via its JTAG port. I've found alot of
> info on using a JTAG port, but nothing that defines how to implement the
> interface.
>
> Does anyone know where I can get that level of detail? And words of
> wisdom from anyone who's done this before are always welcome.
>
> Steve
>
>
I'm looking into this again. We are using a XC95288XL CPLD. Once we
get this working we'll move on to an FPGA.
Looking at AppNote 058 sample code, it bit thumps the JTAG pins. And
it appears that a hardware SPI would not work because it changes modes
by setting TMS and toggling TCK once. You can't do that with HW SPI.
What data type did you use?
Steve
--- In r..., "Fournier, Peter" wrote:
>
> Last time we tried this, we discovered that the JTAG spec would have
> cost us a lot of money. The faster solution was to use SPI to the FPGA.
> I don't know which device you are using and whether it can do SPI, but I
> think that is how the flash based devices work. We are using the
> xc3s700.
>
> -Pete F
>
>
> -----Original Message-----
> From: r... [mailto:r...]
> On Behalf Of seecwriter
> Sent: Thursday, March 17, 2011 3:17 PM
> To: r...
> Subject: [rabbit-semi] Programming FPGA
>
> I have a requirment for a Rabbit to program a flash-based Xilinx FPGA
> via a JTAG interface. The Rabbit would receive the data file via a
> serial port and program the FPGA via its JTAG port. I've found alot of
> info on using a JTAG port, but nothing that defines how to implement the
> interface.
>
> Does anyone know where I can get that level of detail? And words of
> wisdom from anyone who's done this before are always welcome.
>
> Steve
>
>
Reply by ●January 10, 20132013-01-10
I can't send you a file here, I'll send one to your email.
For others who are reading this, the FPGA we are using is a Xilinx XC3S700-4FG400. This one (there may be others as well) has a built in SPI programming capability. We also included JTAG capability for design testing. It took a couple of jumpers and an extra glue chip or two, but it works.
-Pete F
-----Original Message-----
From: r... [mailto:r...] On Behalf Of seecwriter
Sent: Wednesday, January 09, 2013 7:11 PM
To: r...
Subject: [rabbit-semi] Re: Programming FPGA
Pete,
I'm looking into this again. We are using a XC95288XL CPLD. Once we get this working we'll move on to an FPGA.
Looking at AppNote 058 sample code, it bit thumps the JTAG pins. And it appears that a hardware SPI would not work because it changes modes by setting TMS and toggling TCK once. You can't do that with HW SPI.
What data type did you use?
Steve
--- In r..., "Fournier, Peter" wrote:
>
> Last time we tried this, we discovered that the JTAG spec would have
> cost us a lot of money. The faster solution was to use SPI to the FPGA.
> I don't know which device you are using and whether it can do SPI, but
> I think that is how the flash based devices work. We are using the
> xc3s700.
>
> -Pete F
>
>
> -----Original Message-----
> From: r... [mailto:r...]
> On Behalf Of seecwriter
> Sent: Thursday, March 17, 2011 3:17 PM
> To: r...
> Subject: [rabbit-semi] Programming FPGA
>
> I have a requirment for a Rabbit to program a flash-based Xilinx FPGA
> via a JTAG interface. The Rabbit would receive the data file via a
> serial port and program the FPGA via its JTAG port. I've found alot of
> info on using a JTAG port, but nothing that defines how to implement
> the interface.
>
> Does anyone know where I can get that level of detail? And words of
> wisdom from anyone who's done this before are always welcome.
>
> Steve
>
>
For others who are reading this, the FPGA we are using is a Xilinx XC3S700-4FG400. This one (there may be others as well) has a built in SPI programming capability. We also included JTAG capability for design testing. It took a couple of jumpers and an extra glue chip or two, but it works.
-Pete F
-----Original Message-----
From: r... [mailto:r...] On Behalf Of seecwriter
Sent: Wednesday, January 09, 2013 7:11 PM
To: r...
Subject: [rabbit-semi] Re: Programming FPGA
Pete,
I'm looking into this again. We are using a XC95288XL CPLD. Once we get this working we'll move on to an FPGA.
Looking at AppNote 058 sample code, it bit thumps the JTAG pins. And it appears that a hardware SPI would not work because it changes modes by setting TMS and toggling TCK once. You can't do that with HW SPI.
What data type did you use?
Steve
--- In r..., "Fournier, Peter" wrote:
>
> Last time we tried this, we discovered that the JTAG spec would have
> cost us a lot of money. The faster solution was to use SPI to the FPGA.
> I don't know which device you are using and whether it can do SPI, but
> I think that is how the flash based devices work. We are using the
> xc3s700.
>
> -Pete F
>
>
> -----Original Message-----
> From: r... [mailto:r...]
> On Behalf Of seecwriter
> Sent: Thursday, March 17, 2011 3:17 PM
> To: r...
> Subject: [rabbit-semi] Programming FPGA
>
> I have a requirment for a Rabbit to program a flash-based Xilinx FPGA
> via a JTAG interface. The Rabbit would receive the data file via a
> serial port and program the FPGA via its JTAG port. I've found alot of
> info on using a JTAG port, but nothing that defines how to implement
> the interface.
>
> Does anyone know where I can get that level of detail? And words of
> wisdom from anyone who's done this before are always welcome.
>
> Steve
>
>
