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Anybody has any idea if Cyclone V checks for the QSPI size when booting?
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The FPGA does not check the size, but it does do an ID check. I forget which OPCODE it uses, but its one of read ID (0x9F) or read electronic signature (silicon ID) 0xAB (you could use an oscilloscope to see which one the Cyclone V is using at power-on. I recall that the device first issues a write-disable).
Either way, in the Advanced Settings of the configuration file conversion tool, you can disable the ID check. So long as the READ (or FAST_READ) opcode matches the standard parts, it should work fine.
Cheers,
Dave
Honored Contributor
