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ahhh yes sorry when u said Morphic II it did not click, now i remember that is the FTDI FPGA module :) i did have a good read about this when i was first researching this project and it does do exactly what i want!!! but it was missing the FPGA config eeprom and i was not 100% sure how i would add this into its design/ if it was even possible to program a FPGA config eeprom using JTAG.
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Do you need the EEPROM? If you have to plug the module into a USB port, then there is no harm in just programming the device when you need it.
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looking at FPGA schematics none of the JTAG pins seam to go any where near the EPCS4 but im guessing you just connect it to the FPGA as normal and when you use JTAG it programs the FPGA and then the FPGA also writes the data to the EPCS4?
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I'm pretty sure the FPGA pins on the JTAG header go to the JTAG pins on the FPGA. It would have been better if they went to the MPSSE pins, since if you want to use SignalTap, you have to use a USB-Blaster. If the board did have an EPCS4, then you can use the FPGA to program it.
Cheers,
Dave
Honored Contributor
