3.6.3.27 SHLS-62

Message

Error:   (SHLS-62) The depth of FIFO '{fifo}' at {location} was already set to '{depth}' with setDepth() before being set again to '{depth}'. The setDepth function can only be called once per FIFO. For an array of FIFOs, all elements must have the same depth.

/*****************************************************************
 *  This example is expected to result in
 *  - Code  : SHLS-62
 *  - Type  : Error
 *  - Cause : The setDepth() of a FIFO is invoked multiple times
 *            with different 'depth' value in the hardware design code.
 *****************************************************************/ 
#include "hls/streaming.hpp"

int pop(hls::FIFO<int> &fifo) {
#pragma HLS function noinline
    return fifo.read();
}

int DUT( int a, int b ) {
#pragma HLS function top
    hls::FIFO<int> my_fifo;

    my_fifo.setDepth(8);
    my_fifo.setDepth(10);

    my_fifo.write(a+b);
    return pop(my_fifo);
}

Related to: Streaming Library