fpga is configured successfully but cannot work

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My project has two FPGAs and these two FPGAs can be configured separately via their JTAG headers.

Besides, the two FPGAs shares an epcs in the multi-device AS configuration mode.

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Is "headers" a typo? There should only be one JTAG header. If you have two FPGAs in a chain, and chip-enable-out (nCEO) of the first drives chip-enable-in (nCE) on the second, then regardless of the configuration method, you must configure the first FPGA before configuring the second FPGA.

Is the FPGA you are having a problem with the second FPGA? If so, the fact that the first FPGA is not configured is your problem.

Cheers,

Dave