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Hi,
Im looking for some specifications and/or source code which shows how to program an external flash on an ARM7 core through JTAG.
It seems there are two possible ways of doing this.
1. Bit banging the boundary scan register of the ARM7 core
2. Running the ARM7 core in debug mode and...
jed to svf converter
Hi,
I located naxjp (naxjp-0.7.9-1) which includes sourcecode for the CPLD im interested in, and it seems it is able to load a .JED file.
I have not tried it yet, but i think i can use this to achieve my goal.
.jed format
I found the CPLD programming specifications here: **broken link removed**
However they do not mention anything about JTAG. Does JTAG simply control the programming pins?
Added after 1 hours 51 minutes:
Here is some Java source for JTAG programming Xilinx CPLDs...
jed file format
Thank you for the information.
I have now registered for a webcase and im awaiting approval. I will then ask Xilinx for some help.
I will try and read the jesd3c pdf, perhaps this will shed some light on the matter.
I think you are right that it might complicate things trying...
jed format
Thanks for the help but i have already tried searching on these pages and reading the appnotes on the matter. But i dont seem to be able to find any specifications on the .JED file format and also no specifications on which JTAG commands to use for programming the CPLD.
Im not sure...
Hi,
I need to develop software which can program / erase a XC9500 CPLD using JTAG. I have a JED file, and i have the JTAG communcations up and running and can read the ID code of the XC9500 device.
How do i parse a .JED file? or how to interpret the file so i can run the appropriate JTAG...
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