Hi, I am using a custom board design in which i have 2 FPGAs (spartan 3 xc3s4000) and an EEPROM xcf16p daisy chained together. The chain is like this:
EEPROM -> FPGA1 -> FPGA2
Now the problem is that when i try to program the FPGA using JTAG, my DONE goes high, INIT_B stays high and PROG_B stays high after config, iMPACT says program succeeded but FPGA doesn't work. If i run chipscope, it says 0 cores found.
Same goes when i try to program FPGAs using EEPROM. I have tried in daisy chain and even programming the FPGAs individually by disconnecting them from the chain.
Now there's another dynamic to this problem, i have a previously built .bit file, when i program the FPGAs using it, they get programmed. But if i try to program the FPGAs with any other .bit file, they don't. I am clueless now and i cannot find the problem.
I need help here..
Thanks regards
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