Cascade Feature - 2023.2 English

Vitis Libraries

Release Date
2023.2 English

The FFT is configured using the template parameter TP_CASC_LEN. This determines the number of kernels over which the FFT function (or subframe FFT in the case of TP_PARALLEL_POWER>0) is split. To be clear, this feature does not use the cascade ports of kernels to convey any data. IObuffers are used to convey data from one kernel to the next in the chain. The term cascade is used simply in the sense that the function is split into a series of operations which are executed by a series of kernels, each on a separate tile. The FFT function is only split at stage boundaries, so the TP_CASC_LEN value cannot exceed the number of stages for that FFT.